Biosolids are the disinfected remains from the water treatment process once we’ve flushed. It’s a good fertilizer but now it can be made into bricks, the bricks used in construction. Civil engineers at Royal Melbourne Institute of Technology University in Australia developed the process. They look the same as fired bricks and when processed locally can save land, energy and reduce carbon emissions, thus becoming a green alternative. Daily, for example, New York City has 1200 tons or 50 truckloads of what would become biosolids. As it is, what’s not used as fertilizer goes into the sea or landfills. Since population is growing and human waste grows with it, there is pressure to find alternatives. Although biosolids bricks meet industry requirements, they may not be as durable. A proposed usage would be for biosolids to be mixed with soil in some proportion. And given that we make a trillion bricks a year incorporating some biosolids into them would not be a small contribution to the environment. As they decompose biosolids emit carbon dioxide, so the advantages of turning them into a green alternative become clearer and more compelling.
I may have a soft spot for viable green alternatives, but what impresses me about this one is that somewhere people had to overcome our usual reaction to human waste. They saw beyond!