In the future, an effort should be put on the effect of sludge reduction technologies on the removal of organic micropollutants and heavy metals.Īnaerobic digestion Methane Pretreatment Sludge reduction Waste activated sludge Wastewater treatment plants.Ĭopyright © 2017 Elsevier B.V. New York City’s sludge is digested, which is a form of processing that microbiologically transforms material and creates biogas, a type of renewable energy. Once further processed, its use is regulated by both the federal and state governments. The new wastewater treatment processes including SANI®, high-rate activated sludge coupled autotrophic nitrogen removal and anaerobic membrane bioreactor coupled autotrophic nitrogen removal also have a great potential to reduce sludge production. Sludge is the solid byproduct of wastewater treatment. However, thermal pretreatment and TPAD are superior to other pretreatment technologies when pathogen inactivation is required. Wastewater and stormwater enter the sewage system and flow into wastewater treatment facilities, where the solid wastes are separated from the liquid wastes. In sludge treatment line, thermal, ultrasonic (<4400kJ/kg TS), FNA pretreatment and temperature-phased anaerobic digestion (TPAD) are promising if pathogen inactivation is not a concern. Post-treatment of swine wastewater using aerobic granular sludge: Granulation, microbiota development, and performance.
Sludge in wastewater treatment free#
Free nitrous acid (FNA) technology seems good in wastewater treatment line but it is only under the lab-scale trial.
Emphasis was put on their effect on sludge reduction performance, with 10% sludge reduction to zero sludge production in wastewater treatment line and enhanced TS (total solids) or volatile solids removal of 5-40% in sludge treatment line. They include chemical, mechanical, thermal, electrical treatment, addition of chemical un-coupler, and predation of protozoa/metazoa in wastewater treatment line, and physical, chemical and biological pretreatment in sludge treatment line. This review presents the state-of-the-art sludge reduction technologies applied in both wastewater and sludge treatment lines.
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