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Circular economy in sludge treatment

WAI Environmental Solutions AS works with customers to provides treatment technologies and sustainable solutions for wastewater and sludge treatment.

The multidimensional benefits accomplished by circular economy have reinforced the focus on good policies and sustainable solutions for wastewater and sludge treatment.

Rapid urbanization lead to massive generation of wastewater and solid wastes. World Resources Institute (WRI) recently pointed out that in may countries, including China, the disposal of waste products often leads to the pollution of water bodies and farmland.

The pollution is considered a major obstacle to achieving sustainable development, and there is an urgent need to develop environmentally sustainable methods of treating and disposing waste.

The sludge handling is a big global environmental challenge. However, sludge also represent a valuable opportunity to capture and reuse nutrients, reduce greenhouse gas emissions, and recover energy.

Pyrolysis turns sludge and biosolids into gaseous fuel, liquid fuel and biochar. Biochar can be then used as fertilizer and soil conditioner.