Using biotech to purify water and recover valuable waterborne materials
CategoriesSustainable News

Using biotech to purify water and recover valuable waterborne materials

Spotted: Access to safe water, sanitation, and hygiene are essential for health and well-being. Yet billions of people still lack access to these basic needs. On top of this, demand for water is rising due to population growth, urbanisation, and increasing water demands from sources such as agriculture, industry, and energy. But water purification and recovery can be expensive, requiring a great deal of energy, which can, in turn, lead to carbon emissions.

Now, Swedish company Retein has developed a new technology for energy-efficient and high-purity water separation. This has the potential to reduce the cost of recovering clean water while having a lower impact on the environment than traditional methods. The method was initially developed as a PhD project at Chalmers University of Technology.

The technology utilises a channel protein called aquaporin. Channel proteins provide gateways across the cell membrane, allowing water, nutrients, and other resources to move in and out. Retein has developed a new class of aquaporin capsules that are purified and stabilised by silica. These capsules are then incorporated into conventional polymer membranes to allow water to move rapidly across the separation membrane, with very little input of energy.

Not only could Retein’s aquaporins be used to filter water, but also to filter out other materials, potentially allowing the recovery of substances such as lithium from water. Because the aquaporins have been stabilised, they could easily be used as an additive to various kinds of filters on a wide range of scales.

Climate change is increasing the frequency of extreme weather events – including drought and flooding. This is making the need for sustainable water purification more urgent than ever. Luckily, Springwise is spotting a number of innovations in this space. These include a membrane coating that could make filtration cheaper and greener, and a modular wastewater treatment system driven by sunlight and water movement.

Written By: Lisa Magloff

Reference

Using insects to turn waste into valuable products
CategoriesSustainable News

Using insects to turn waste into valuable products

Spotted: According to a paper from the University of Minnesota’s Institute on the Environment, 36 per cent of the world’s crop calories are actually used for animal feed, which is an inefficient way of producing food. For example, it takes about 100 calories of grain to produce just 12 calories of chicken or three calories of beef. However, a biotech startup in India is developing a more efficient way to feed livestock – using insects.

Instead of growing grain, Loopworm farms black soldier flies and processes them into animal feed products. The insects are raised on food waste sourced from food processors, retail chains, and fruit markets. Once grown, the insects are processed into animal and fish feed.

The finished meal is high in protein, containing around 60 per cent crude protein. The company also claims that it is rich in bio-active peptides which promote anti-oxidative, anti-inflammatory, and anti-microbial properties. Because of this, it can be used as an ingredient in fish, poultry, and even pet food formulations as a replacement for fish meal. The feed also has a lower ash content than traditional meals, which makes it more digestible.

Co-founders Ankit Alok Bagaria and Abhi Gawri set up Loopworm to help solve India’s food waste problem. Bagaria explains: “Our major concern was that we had a significant amount of food waste in India … and there wasn’t much of a meaningful solution, where food waste is actually upcycled. There are solutions like composting, or biogas generation, which actually down cycles the product.”

Insect farming has been gaining traction in recent years as entrepreneurs and scientists search for alternative ways of producing protein for animal and human consumption. Some other innovations that Springwise has spotted include using insects to produce aquaculture feed, and a project that converts waste into animal feed using insects.

Written By: Lisa Magloff

Reference