Meeting Circular Economy Demands with Advanced Digestion

Currently, about 30-35% of the Indian population is connected to the sewage network, requiring large infrastructure projects for treating wastewater and most of these are underway in major cities (New Delhi, Mumbai, Bengaluru, to name a few). As India focuses on wastewater treatment, the world is moving towards a circular economy, with ambitious targets for reuse and resource recovery. The World Economic Forum (2018) shows many ways in which cities can become more sustainable by designing their infrastructure and system for a circular economy. The question for Indian cities is, how can they be a part of this circular economy model while tackling and coping with tremendous population growth at an affordable cost while becoming more sustainable and facilitating the recovery of valuable resources from increasing waste streams. From a sludge management perspective many cities around the world have embraced sustainable technologies like advanced anaerobic digestion (AAD), and at a lower life cycle cost and carbon footprint than alternative non-circular solutions. Some examples are seen in cities like Washington DC, London, Beijing, Oslo, Edinburg, to name a few.

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