A zoo in the USA has revealed it will use anaerobic digestion (AD) to help it achieve its ambitious environmentally-friendly goal of being powered entirely by Michigan-made renewable energy. The Detroit Zoological Society (DZS) announced it has installed an anaerobic digester that is able to make compost and energy from herbivore animal waste and food scraps. In addition … [Read more...] about AD To Help US Zoo Meet 100% Green Energy Goal