Recovery of Valuable Products from Municial Wastewater Sludge

摘要

Municipal wastewater sludge is a complex product containing both valuable substances as well as contaminants. The valuable substances are: i) Phosphorus, ii) Organic matter, and iii) Coagulants. The contaminants include heavy metals and organic micro-pollutants. With increasing wastewater volumes and advanced wastewater treatment processes, sludge production continues to grow and with it, the volumes of contaminated sludge which is not suitable for arable land. This will have an unacceptable, negative impact on the environment. This is why new sustainable sludge treatment technologies/disposal alternatives have become so interesting.