Close up of precast concrete slab with hollow cells created using 3D-printed FoamWork by ETH Zurich
CategoriesSustainable News

“The world needs cement” says concrete industry decarbonisation chief

Concrete will remain the world’s dominant construction material over biomaterials such as timber as the world transitions to net-zero, claims GCCA chief executive Thomas Guillot.

The second most widely used material on the planet after water, concrete is produced by a massively polluting industry that accounts for around seven per cent of the world’s carbon dioxide emissions. For comparison, aviation is responsible for closer to two per cent.

However, Global Cement and Concrete Association (GCCA) chief executive Guillot argues the focus should be on reducing the carbon footprint of concrete rather than seeking to replace it.

“Concrete is really the backbone of all modern society”

“If you look around us, concrete is really the backbone of all modern society,” he told Dezeen. “So it’s easy to say we get rid of cement, but the reality is that everywhere we look for infrastructure, for schools, for roads, for development, cement is there. The world needs cement.”

“So the question is now: if this material is fundamental to the world, then we are custodians as an industry of that material, and as much as we need concrete, we need us to bring net-zero concrete to the world,” he continued.

“The core of our priority is to bring net-zero concrete to the world in the next decades.”

Many sustainable building campaigners argue that to keep global temperature rises under control, concrete must increasingly be swapped out for carbon-sequestering biomaterials, especially timber.

But Guillot believes that his organisation’s vision for a net-zero concrete product will remain the building material of choice for most construction projects, in favour of timber or direct concrete alternatives like hempcrete.

“There are substitutes of concrete,” said Guillot. “The problem is the volume of the use of the material on the scale that concrete is used around the world. So what material can substitute concrete really?”

“You say some of these technologies are better, fine,” he added. “Put a price on carbon and let the market compete, and then we’ll see what is the most effective material,” he said in reference to the GCCA’s call for widespread market-based carbon pricing.

“I’m taking the bet: concrete has a future in a regulated world that says CO2 has a cost and you need to price it.”

The GCCA describes its mission as helping the concrete and cement industry transition to net-zero by 2050.

Its website features multiple fallacy-versus-fact-style articles pouring doubt on the suitability and sustainability of timber as a construction material while extolling the benefits of concrete.

Ribbon of Light in Los Angeles
Top: Thomas Guillot addressed the GCCA’s CEO gathering in Atlanta this year. Above: the Ribbon of Light viaduct in LA. Photo by Iwan Baan

But Guillot denies that his organisation is anti-wood.

“We are not against any type of materials,” he said. “I am definitely not the one that will start to bitch on wood or things like this, because that’s not the point, that’s not my role, honestly. We want to use our energy in trust-forming our materials, not bitching on others’ materials.”

Instead, he claims, the GCCA is seeking a “fair comparison” between the merits of concrete and timber.

“We need to use all the materials we have, but we need to have a fair understanding and we should be candid in front of the reality of what wood is,” he argued.

“We have an issue with deforestation, right? Try to scale using wood in core elements in line with deforestation, in line with mono types of forestry, biodiversity etcetera, etcetera, just try to map that.”

“We are not here to defend an old industry”

The GCCA’s membership includes huge corporations like HeidelbergCement and Cemex, plus more than 40 national cement associations.

It represents 80 per cent of the world’s cement manufacturing capacity outside of China, as well as some Chinese companies including CNBM, which produces around 500 million tonnes of concrete each year. China alone pumps out more than half the world’s concrete and cement.

The GCCA frequently cites the statistic that three-quarters of the infrastructure that will exist in the world by 2050 has yet to be built.

To enable that to happen, it argues, concrete will be crucial. However, Guillot insists the GCCA is not interested in “protecting the status quo”.

“We are not here to defend an old industry,” he said.

“We are not protecting the status quo. We are defending a tremendous – is it a revolution, an evolution? I don’t know, I can’t qualify it today – but we are defending a tremendous change of our industry.”

“We are habitants of the planet, and we totally understand that we are custodians of that material [concrete] and that we need to change things.”

And he concedes that the world will need to find a way to use less concrete and cement.

“We are not saying that it’s concrete and only concrete; there are things out there that will help, including reducing the quantity of material use,” he said. “I say we have to use that material in a more frugal manner.”

“We have to use concrete in a more frugal manner”

Guillot worked in the industry for 20 years before being appointed to lead the GCCA in 2021.

Last year, the body launched a 2050 net-zero roadmap, in what Guillot claims was a “first for the industrial sector”.

Its vision for net-zero concrete seeks “CO2 optimization at each place of the value chain”, according to Guillot.

That includes using concrete more efficiently with the help of 3D printing in construction and better design, plus more accurate measuring of cement brought to market – which is currently often sold by the bag.

The GCCA's net-zero roadmap
The GCCA unveiled its net-zero roadmap in 2021

It also involves adopting recipes for cement that use less of the high-carbon base material clinker, with the GCCA supporting research exploring clay cement as an alternative to the standard Portland cement.

“Circularity is also an important element,” added Guillot. “I mean how much you can reuse the concrete itself, the recycling of concrete, the recycling of cement. Some of our members have put on the market some cement which has up to 20 per cent of circular material inside.”

By reducing clinker-related emissions, producing and using concrete more efficiently and transitioning to renewable electricity, the GCCA believes that the concrete industry can cut its total global carbon dioxide emissions – currently 2.5 billion tonnes a year – by 64 per cent.

The remaining 36 per cent, the single biggest element in its net-zero roadmap, relies on carbon capture at cement plants.

“The technology exists, just it is not applied to cement conditions yet”

Industrial carbon capture involves capturing CO2 from factory flues using machines, which can then be stored or utilised for other purposes. At least 35 carbon capture plants are currently planned by GCCA members, though none are yet fully operational.

“All our members are working on that, making the technologies happen, working on innovation to make sure that this is coming,” said Guillot.

“The technology exists, just it is not applied to cement conditions yet, so this is about to be proven,” he claimed.

Some experts believe that carbon capture will form a major part of the world’s transition to net-zero.

Others – including Cambridge University engineering professor Julian Allwood – have argued that the novel materials and carbon capture technologies being explored by industry cannot be scaled up fast enough to decarbonise all of the world’s concrete production by 2050.

The GCCA’s roadmap calls the 2020s “the decade to make it happen” – the period in which it hopes the industry can develop carbon-reducing technologies to roll out between 2030 and 2050.

It had an active presence at the recent COP27 climate summit. One of its main asks is for governments, which represent a large proportion of global demand for cement, to “stop buying high-carbon concrete” according to Guillot.

“You need to create demand for low-carbon material so that these materials can flow, can have its own market,” he said.

Instead of binding targets, which it argues would place firms in some countries at a disadvantage, GCCA members are required to set their own sustainability objectives that increase in ambition year-on-year.

“Judge us on action”

The body’s recently released one-year action and progress report said that the latest available data showed its members had reduced their net CO2 emissions per tonne of cement by 22 per cent between 1990 and 2020.

However, research by the CICERO Center for International Climate Research found that the industry’s overall CO2 emissions have risen dramatically over the same period due to an increase in production.

“Judge us on action,” said Guillot. “We will be relentlessly working on getting people in motion to the transformation.”

“That’s the essence of this association, the GCCA – we need to accelerate the net-zero transition. This is our headache, this is our life motive, and I’m waking up at night saying ‘how do we do that quicker?'”

Reference

Traceability data for the fashion industry
CategoriesSustainable News

Traceability data for the fashion industry

Spotted: Most organisations have realised the importance of sustainability for their brand image. However, it is very difficult to guarantee supply chain transparency and product traceability over the large networks of suppliers that most big businesses rely on. To make things easier, Swedish company TrusTrace has developed a platform for product traceability and supply chain transparency within the fashion, food, and retail industries.

The TrusTrace platform uses artificial intelligence (AI) and blockchain to integrate retailer, manufacturer, and supplier systems, as well as third parties such as certification agencies, lifecycle datasets, and other sustainability solution providers. The system allows users to track and trace materials and ESG and compliance data for thousands of suppliers and products. Unlike some similar systems, TrusTrace is built specifically for the scale of ultra-large and complex textile supply chains, providing the fashion industry with much-needed transparency.

The software-as-a-service platform allows organisations to track transactions and scope certificates in a standardised and scalable way, while gathering the evidence needed to meet compliance requirements, and see the status of goods as they move through the supply chain.

TrusTrace co-founder and CEO Shameek Ghosh explains: “We have developed our Material Intelligence Frameworks for certified and non-certified materials, which accelerates a brand’s journey to achieve high levels of material compliance. Our goal is to make sure traceability data is accessible in real-time along the value chain as raw materials become finished products.”

Improving sustainability and traceability in the textile industry is the goal of several innovations Springwise has spotted. These include a platform that helps fashion brands have better control over their sustainability data, and a closed-loop production system for cotton goods.

Written By: Lisa Magloff

Reference

Modular facade of Green Solution House 2.0 by 3XN
CategoriesSustainable News

Green Solution House 2.0 is CLT-framed hotel designed by 3XN

Timber provides almost all the building fabric of Green Solution House 2.0, a hotel on the Danish island of Bornholm completed by architecture studio 3XN.

Located in the town of Rønne, the modular building consists of a structural frame of cross-laminated timber (CLT), an exterior of timber boards and a layer of wood fibre insulation.

Modular facade of Green Solution House 2.0 by 3XN
Green Solution House 2.0 has a modular CLT frame

The design was developed by 3XN with its sister studio GXN, which specialises in circular architecture, and is intended as a model for sustainable construction.

As well as specifying natural materials, the design team planned the hotel so that it could be built quickly and efficiently, with minimal waste.

Side view of timber-framed hotel by 3XN
Timber clads the exterior above a layer of wood fibre insulation

Its CLT frame was designed as a kit of parts and manufactured off-site. Material offcuts were carefully calculated and then used to create bespoke furniture elements within the building.

The building also incorporates granite surfaces made using waste material from local quarries.

Balcony of Green Solution House 2.0 by 3XN
The structure was designed as a kit of parts and built off-site

“The widespread use of timber is both good for the climate and gives a particularly warm atmosphere,” said Lasse Lind, partner at GXN and project lead for Green Solution House 2.0.

“The building itself is an expression of the hotel’s ambition to make green solutions an attractive element for guests.”

Staircase and atrium of 3XN-designed hotel in Denmark
Hotel rooms sit on either side of a central atrium and staircase

Green Solution House 2.0 is an extension of Hotel GSH, also designed by 3XN, which opened in 2015.

The three-storey building contains 22 single bedrooms, one double bedroom and two dedicated meeting rooms.

Its interior is organised around a linear atrium, sandwiched between two rows of rooms on the ground and first floors.

A generous staircase rises up through its centre, leading up to a terrace and spa on the uppermost floor.

Bedroom in Green Solution House 2.0 by 3XN
CLT offcuts were used to create bespoke furniture

A sheltered balcony or terrace fronts each room, helping to naturally shade floor-to-ceiling glazing while also providing guests with private outdoor space.

Inside the rooms, the CLT structure is left exposed to create a warm cabin-like feel.

View from balcony of Denmark hotel
Each room has its own balcony or terrace

Modularity was key to minimising waste in Green Solution House 2.0.

The building is formed of repeating box-like modules, arranged in a staggered formation to capture as much natural daylight as possible.

This standardised approach meant that offcuts were of the same size and dimensions, making it easier to utilise them for multiple furniture elements.

Top floor of Green Solution House 2.0 by 3XN
A spa is located on the uppermost level

Timber is a recurring material in 3XN projects, with recent examples including the Klimatorium climate centre, also in Denmark, and the planned extension to the Ecole Polytechnique Fédérale de Lausanne in Switzerland.

The extensive use of the material for Green Solution House 2.0 has led to the project being named a 2022 winner of Årets Byggeri, a prestigious architectural award in Denmark. Hotel GSH received the same award in 2015.

Wooden facade of Denmark hotel by 3XN
The facade is staggered to maximise natural daylighting

“We are very proud to receive this award, which focuses on the impact that architecture can have on society,” said Lind.

“As an office, we seek to inspire through our projects, and we hope the Green Solution House 2.0 will inspire people to build with biogenic materials, use local and upcycled resources, and make holistic sustainability the main design driver.”

Facade of Green Solution House 2.0 by 3XN
Green Solution House 2.0 forms part of Hotel GSH in Rønne

The building also incorporates rooftop solar panels and water recycling to reduce its energy footprint.

The studio expects the building to have a very low carbon footprint across its lifespan.

The photography is by Adam Mørk.

Reference

A countertop device for brewing plant-based milk at home 
CategoriesSustainable News

A countertop device for brewing plant-based milk at home 

Springwise: Some favorite foods, including staples such as pancakes, hummus, and guacamole, are relatively simple to make at home. However, it does take a bit more time to assemble all the ingredients and do the work than it does to open a container and enjoy something immediately. Non-dairy milks are another popular foodstuff that is fairly easy to make. They require a nut or seed, water, and a blender. Despite the ease, though, many of us just don’t have the time, inclination or ingredients to make these by hand. 

Step in GROW UP, a sleek, countertop milk brewer designed to produce fresh, non-dairy milk within minutes. Users choose from a range of up to 10 different ingredients, including nuts, oats, coconuts, and hemp seed. All it takes to make a glass of fresh milk is one cup of the chosen ingredient, plus water, added to the top of the brewer. With the push of a digital button, the device makes fresh milk in less than six minutes.

There are two colours available – black and grey – and parts of the machine are dishwasher safe. GROW UP also does not use single use packaging, and the machine includes a self-cleaning function. The machine is currently available for pre-order with a $50 (around €46) deposit and is scheduled to be shipped in spring 2023.  

As well as milk, recent innovations in non-dairy products that Springwise has spotted include vegan cheeses, lab grown egg whites, and bacteria-based whipped cream.

Written By: Keely Khoury

Reference

Stephen Taylor Court by Feilden Clegg Bradley Studios
CategoriesSustainable News

FCBS creates Passivhaus student accommodation crescents in Cambridge

Architecture practice Feilden Clegg Bradley Studios has created a series of crescent-shaped student housing blocks with a CLT structure for King’s College at the University of Cambridge.

Called Stephen Taylor Court, the blocks contain 84 homes for King’s College’s graduate students and fellows that were designed to Passivhaus standards and to have as low a carbon impact as possible.

“Due to the considered material choice, prioritising low-embodied carbon materials, reuse of existing materials, local sourcing and targeting recycled content, and accounting for carbon sequestered in the cross-laminated timber, the project has negative embodied carbon on completion as more carbon has been sequestered in its production than emitted,” Feilden Clegg Bradley Studios partner Hugo Marrack told Dezeen.

Stephen Taylor Court by Feilden Clegg Bradley Studios
The project is made up of three crescent-shaped buildings

The architecture practice used its own carbon tool named FCBS Carbon at early design stages to help estimate and limit the whole-life carbon emissions of the scheme.

FCBS Carbon is a spreadsheet that is free to use by other architects and considers all the CO2 produced by a building, including the building material, construction and demolition.

Feilden Clegg Bradley Studios used Stephen Taylor Court as a “test case” for its tool and calculated its net carbon performance – both operational and embodied – to be less than zero for the first 10 to 15 years of the project’s life.

According to Marrack, the carbon calculations for the project did not consider furniture, fixtures and equipment (FF&E) or mechanical, electrical and plumbing (MEP).

Stephen Taylor Court by Feilden Clegg Bradley Studios
Steep-pitched roofs reference arts and crafts buildings in the area

Located within a conservation area in Cambridge, the apartments have a cross-laminated timber (CLT) structure clad in water-struck gault bricks that are similar in appearance to traditional Cambridge bricks.

The CLT structure was chosen for its lightweight property, airtightness of the structural envelope and the material’s low embodied carbon.

Stephen Taylor Court by Feilden Clegg Bradley Studios
Stephen Taylor Court has a cross-laminated timber structure clad in brick

“The lightweight CLT structure of the buildings reduces foundation loads, allowing the use of a thin reinforced concrete raft foundation ‘floating’ on rigid insulation,” explained Smith and Wallwork structural engineer Tristan Wallwork.

“This not only reduces the amount of concrete used in the substructure but also provides a perfect Passivhaus foundation solution.”

“Detailing of any inherent thermal bridges, such as facade restraint ties, is also drastically simplified due to the robust and solid CLT structural envelope – providing complete flexibility on location of any fixings required,” continued Wallwork.

Feilden Clegg Bradley Studios plans to continue to work with the college in the future to help maintain net-zero carbon beyond the first 10 to 15 years after completion, by implementing renewable energy options such as photovoltaic panels.

Stephen Taylor Court by Feilden Clegg Bradley Studios
The accommodation buildings surround a courtyard

The 4,300-square-metre scheme is located within a conservation area known for its arts and crafts houses, which influenced Feilden Clegg Bradley Studios’ design.

The housing at Stephen Taylor Court is made up of three brick crescents surrounding a garden courtyard with an adjacent red brick villa.

“The central triptych of three crescents creates an open and informal court which provides depth and breadth to views from the streetscape to the leafy context beyond,” said Hugo Marrack.

Stephen Taylor Court by Feilden Clegg Bradley Studios
A red brick villa sits at the centre of the scheme

Steep-pitched roofs, dormer windows that punctuate the roofline and oriel windows on the gable ends of the apartments reference the arts and crafts buildings in the area.

“The sympathy with the arts and crafts approach is in celebrating the joy in each of these building details and the material’s properties, rather than ironing them out, as one might with a more minimal approach,” Marrack explained.

“This being said, the results aim towards a leaner, contemporary expression of its time, rather than forms of reproduction. In some respects, the outcomes are almost brutalist,” he continued.

Stephen Taylor Court by Feilden Clegg Bradley Studios
The project is part of the college’s plan to provide sustainable living for its students

Along with the newly built housing, Feilden Clegg Bradley Studios refurbished and extended an existing Victorian-era villa on the site to accommodate a common room, library and laundry room.

Stephen Taylor Court is the second graduate accommodation at the college to be built in recent years after the development at Cramner Road by British firm Allies and Morrison, which was also built to Passivhaus standards and was longlisted in the 2021 Dezeen Awards.

The photography is by James Newton.


Project credits:

Architect: Feilden Clegg Bradley Studios
Landscape architect: Robert Myers Associates
Planning consultant: Turley
Structural engineer: Smith and Wallwork
MEP and sustainability engineer, acoustic engineer and Passivhaus consultant: Max Fordham
Principal designer, project manager and quantity surveyor: Faithful and Gould
Fire engineer: The Fire Surgery
Main contractor: Gilbert Ash

Reference

Spreading rocks on tropical farmland to capture carbon
CategoriesSustainable News

Spreading rocks on tropical farmland to capture carbon

Spotted: Wanting to help make the long-standing agricultural practice of remineralising soil with rock powder even more effective, a team of researchers formed InPlanet. Focused exclusively on accelerating the natural carbon removal that occurs when carbon dioxide reacts with silicate rocks and water, the process cleans the air and improves crop outputs. 

Working with mines across Brazil, the company is scaling a sustainable farming practice that has been practiced in the country for generations. The high temperatures and consistent rainfall of the tropics significantly affect the quality of farmed soil. But, spreading ground rock across the fields improves soil biodiversity, and particularly its mineral content, as many commercial fertilisers kill off helpful growth as well as weeds. 

Once the crushed rock is spread, the CO2 will remain inground for thousands of years, whether in the field itself or as sediment in the oceans if it runs off. Farmers can save money they would otherwise spend on chemical fertilisers, and as well as enriching the soil, the rock captures high volumes of CO2 that would otherwise remain in the atmosphere.  

The country has set itself a goal of certifying up to 1,000 mines by 2050 as suppliers of the rock for agricultural use. InPlanet is using its research and development (R&D) capabilities to help farmers economically justify the switch from pesticides and other synthetics to enhanced rock weathering (ERW) field management. Having recently closed an oversubscribed €1.2 million pre-seed round of funding, the company is planning to expand its team and monitoring capacity.  

From growing minerals underground that lock away captured CO2 to using sequestered carbon for industrial processes, Springwise has spotted a range of ways that captured carbon dioxide is being used.

Written By: Keely Khoury

Reference

Close up of precast concrete slab with hollow cells created using 3D-printed FoamWork by ETH Zurich
CategoriesSustainable News

Seven alternative bricks made of reclaimed waste and biomaterials

Expanded cork, construction waste and human urine feature in this roundup of brick alternatives, designed to reduce the masonry unit’s embodied carbon footprint.

After concrete and steel, brick has become the latest focus for architects, designers and material researchers hoping to slash the emissions associated with building materials.

That’s because bricks are generally made from clay – a finite resource that needs to be mined and shipped around the globe – as well as being fired in fossil fuel-powered kilns at temperatures of more than 1,000 degrees Celsius, often for several days.

This energy-intensive process generates not just a large amount of greenhouse gas emissions but also carbon monoxide and other dangerous air pollutants, especially in South Asia where kilns are often still powered by coal.

To tackle these problems, brick manufacturers and researchers are increasingly looking at how to make use of local waste materials to create masonry units, as well as reverting to traditional methods of sun-drying to cut out the need for firing.

Read on for seven examples of brick alternatives, ranging from experimental student projects to the Dezeen Award-winning K-Briq, which is set to go into mass production this spring.


Cork blocks by MPH Architects, Bartlett School of Architecture, University of Bath, Amorim UK and Ty-Mawr

Interlocking blocks of expanded cork are stacked like Lego blocks without the need for mortar or glue in this construction system, which was used to build the Stirling Prize-nominated Cork House.

This means the bricks can be used to create structures that are easily disassembled, recycled and reused, as well as having the potential to be carbon negative due to the large amounts of CO2 sequestered by the cork oaks, from which the material is sourced.

London firm MPH Architects has been working on the system in collaboration with various research institutes since 2014, and is now hoping to develop it into a self-build cork construction kit.

Find out more about the cork blocks  ›


Dezeen Awards sustainable
Photo by Zero Waste Scotland

K-Briq by Kenoteq

At 90 per cent, the K-Briq offers “the highest recycled content of any brick” currently on the market, according to manufacturer Kenoteq, leading the brick to be crowned sustainable design of the year at the 2022 Dezeen Awards.

As the brick doesn’t need to be fired, it requires 90 per cent less energy in its production than a traditional brick and ultimately emits less than a tenth of the carbon emissions in its manufacture.

Out of the brick alternatives on this list, K-Briq is the closest to commercialisation. But its prolonged curing process has previously posed issues for quick-turnaround projects, with South African studio Counterspace forced to abandon plans to integrate K-Briqs into the 2021 Serpentine Pavilion due to long lead times.

Find out more about the K-Briq ›


Building the Local by Ellie Birkhead

Building the Local by Ellie Birkhead

This student project from Design Academy Eindhoven graduate Ellie Birkhead makes use of local waste materials such as hair from a hairdresser, horse manure from a stable and wool from a farm to reinforce unfired clay bricks.

The result is different region-specific bricks, which Birkhead argues can help to manage waste in a more circular way and “forge a future for local industry”.

Find out more about Building the Local ›


Gent Waste Brick by Carmody Groarke, TRANS Architectuur Stedenbouw, Local Works Studio and BC Materials

Gent Waste Brick by Carmody Groarke, TRANS Architectuur Stedenbouw, Local Works Studio and BC Materials

To form the new wing of the Design Museum Gent, architecture studios Carmody Groarke and TRANS Architectuur Stedenbouw worked with materials researchers to turn local municipal waste such as demolition concrete and glass into an unfired low-carbon brick.

This carries one-third of the embodied carbon as a typical Belgian clay brick and is produced in a simple process that is being opened up to the public through workshops, encouraging local residents to have a hand in the construction of their museum.

“The bricks will be manufactured on a brownfield site in Ghent using a clean simple production process, which could easily be replicated in other urban settings,” said Carmody Groarke. “There are no resultant emissions, by-products or waste.”

Find out more about the Gent Waste Brick ›


Green Charcoal bio-brick by Indian School of Design and Innovation Mumbai

Green Charcoal bricks by the Indian School of Design and Innovation

These concrete bricks from the Indian School of Design and Innovation in Mumbai are enriched with soil, charcoal and loofah fibres, which create air pockets and help to reduce the amount of cement needed in their production process.

The resulting building blocks are up to 20 times more porous than common bricks, promoting biodiversity by making space for plants and insects in our cities, the researchers claim.

Find out more about Green Charcoal ›


Mycelium Brick by The Living

Mycelium Brick by The Living

One of the first experiments in using mycelium at an architectural scale saw New York studio The Living construct 2014’s MoMA PS1 pavilion using bricks that were grown from the root-like structure of fungi.

Based on a process pioneered by biomaterials company Ecovative, this involved placing waste corn stalks from agriculture inside a mould and encouraging the mycelium to grow around this aggregate, effectively cementing the brick.

Mycelium is also increasingly being explored as a means of insulating and fire-proofing buildings that can help to sequester carbon while being biodegradable.

Find out more about the Mycelium Brick ›


Bio-bricks from human urine by University of Cape Town

Urine bio-bricks by Suzanne Lambert

In this experimental project from University of Cape Town researcher Suzanne Lambert, human urine, sand and bacteria are combined in brick-shaped moulds.

The bacteria triggers a chemical reaction that breaks down the urea in the urine while producing calcium carbonate – the main component of cement – in much the same process that seashells are formed.

“The longer you allow the little bacteria to make the cement, the stronger the product is going to be,” Lambert told Dezeen.

Find out more about the urine bio-bricks ›

Reference

A ‘positive only’ social media app
CategoriesSustainable News

A ‘positive only’ social media app

Spotted: Once considered a panacea for democratising society and helping people feel more connected, today social media is increasingly seen as something that brings out the worst in too many people. While there have been proposals for how to make social media safer, a Berlin-based startup has come up with a new idea.

SLAY is a new app that promotes positive online interactions for teens through playful social gaming experiences. It is a ‘positive only’ platform where anonymity is used for positivity. Users answer encouraging polls about others and compliment their friends. Only friends, contacts, and classmates are allowed to vote for each other, never strangers; and there is no direct messaging feature.

When users start the app, they are presented with questions that they respond to by selecting a different user to anonymously compliment. All users will be able to read the compliments they have received, but the identity of the person who offered them remains secret.

SLAY has recently raised €2.5 million in a pre-seed round of funding led by Accel. SLAY says it will use the funds to publicly launch the platform in new countries, build its product and consumer teams, and further develop the app’s features and functionality.

Reversing the negative effects of social media has been the goal of a number of innovations Springwise has recently spotted. These include research tools that help people to better understand the viewpoints of social media posts, and a platform that rates news for reliability and bias.

Written By: Lisa Magloff

Reference

Photo of the front of a turboprop plane with ZeroAvia branding on the side sitting on tarmac
CategoriesSustainable News

ZeroAvia test-flies largest plane yet powered by hydrogen-electric engine

ZeroAvia has flown what the aviation company claims is the largest aircraft yet to be run on a zero-emissions hydrogen-electric engine, testing a 19-seater plane over the skies of England.

The company flew a modified 19-seat Dornier 228 twin-engine aircraft with one prototype hydrogen-electric engine retrofitted on its left wing and a regular gas turbine engine, a Honeywell TPE-331, on its right wing.

The test flight saw the plane take off, fly and land at ZeroAvia‘s R&D facility at Cotswold Airport in Gloucestershire on 19 January.

Photo of the front of a turboprop plane with ZeroAvia branding on the side sitting on tarmac
ZeroAvia has test-flown a plane retrofitted with a hydrogen-electric engine

According to ZeroAvia, the flight shows the British-American company is on track to run its first hydrogen-powered commercial flight by 2025, with the aim of eventually scaling up the technology to larger planes.

“This is a major moment, not just for ZeroAvia but for the aviation industry as a whole, as it shows that true zero-emission commercial flight is only a few years away,” said ZeroAvia founder and CEO Val Miftakhov. “Our approach is the best solution to accelerate clean aviation at scale.”

ZeroAvia uses hydrogen fuel cells, one of two major hydrogen-based technologies being explored for flight along with the hydrogen combustion engine.

Photo of a white and blue painted turboprop plane with ZeroAvia branding on the side taking off from a runway
The plane took off and landed at ZeroAvia’s base in south-west England

In fuel cells, hydrogen is used to produce electricity and that electricity powers the propeller, instead of the hydrogen being burnt like in a combustion engine. The process generates no emissions besides water vapour.

ZeroAvia deployed its prototype engine in a testing configuration that featured two fuel cell stacks along with lithium-ion battery packs to provide extra support for takeoff and backup power.

The fuel cells and hydrogen tanks were housed inside the cabin of the plane, where the seats would usually be. But eventually, they will need to be stored externally.

The company conducted the flight test under what it describes as the “stringent” requirements for a Part 21 aircraft flight permit with the UK’s Civil Aviation Authority, which the company says signals its readiness for commercial certification.

ZeroAvia says that under these conditions, the test flight places the company on the direct path to a certifiable configuration to be finalised and submitted for approval in 2023.

ZeroAvia is one of the current leaders in the race to develop hydrogen engines to decarbonise plane travel. The prototype tested was developed as part of the company’s HyFlyer II project, which is supported by the UK government’s Aerospace Technology Institute and targets the development of a 600-kilowatt powertrain.

Photo of two men hugging next to a small aircraft
Pilot Jon Killerby and ZeroAvia Europe head Sergey Kiselev led the test flight

Simultaneously, the company is also developing a two-to-five megawatt powertrain that scales the technology for aircraft with up to 90 seats.

Hydrogen engine technology is evolving rapidly, with many airlines and aerospace companies engaged in development and testing.

Recently, EasyJet and engineering company Rolls-Royce conducted a ground test of a modified commercial aircraft engine run on hydrogen combustion, while Airbus has previously revealed three concept designs for hydrogen-powered aircraft.

A challenge for the technology is the size of the hydrogen tanks required, which has made critics doubt that it can ever be used for jet planes or long journeys.

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Using AI to eliminate protein allergies
CategoriesSustainable News

Using AI to eliminate protein allergies

Spotted: Although statistics vary, it is estimated that one per cent of the global population have coeliac disease, and finding suitable and affordable gluten-free foods can be challenging. Working towards elimination of gluten sensitivity and food allergies is biotech startup Ukko, founded by Professor Yanay Ofran and Dr. Anat Binur. 

Using AI-engineered proteins, the company plans to create new food products that no longer trigger an allergic response. By mapping exactly which portion of a protein causes the allergic reaction, the co-founders have been able to keep the useful portions while discarding the dangerous parts. 

AI analysis helped the co-founders create a gluten protein that did not trigger a typical immune reaction yet still gave baked goods their textures and flavours. If grown commercially, the modified gluten could form a new strain of wheat that would be usable in many types of foods.    

Ukko points out that gluten-free products are often less healthy than the original version because of added preservatives and extra sugar. Healthcare costs are rising as dietary sensitivities increase, so modified proteins could have positive long term health consequences as fewer people require care for allergies or gluten intolerance.  

The next stage of development is to apply protein modification to allergy therapies, focusing first on peanuts. Manipulated proteins could be used to help individuals build up their tolerance to the food without any of the potentially fatal side effects.

As Springwise has spotted, biotechnology is shaping many industries, with molecular-level innovation making it possible to grow cultured meat from 3D-printed edible ink, and new types of microorganisms designed to target disease-causing proteins.  

Written By: Keely Khoury

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