Ozonation strategies to reduce sludge production of a seafood industry WWTP

Pilot-scale study of sludge pretreatment by microwave and sludge reduction based on lysis–cryptic growth

“…Improper treatment of the sludge poses major risks to public health. Currently, the treatment and disposal of excess sludge constitute 50-60% of the operating costs of wastewater treatment plants (WWTPs) (Campos et al, 2009). Therefore, cost-effective disposal of the excess sludge into the environment is a serious challenge faced by researchers.…”

Effects of metabolic uncouplers on excess sludge reduction and microbial products of activated sludge

“…These excess sludge should be treated before discharge and the treatment costs of the excess sludge were high, which may be accounted for 50-60% of the total operation costs of wastewater treatment plants (Horan, 1999;Campos et al, 2009;Feng et al, 2013). Therefore, effective strategies should be developed to reduce sludge production through either sludge post treatment or sludge in-situ treatment.…”

Combined effect of sodium dodecyl sulfate and enzyme on waste activated sludge hydrolysis and acidification

“…The annual production of WAS reached 25 million tons (calculated by 80% of water content) in China in recent years, which might pose a significant threat to ecology system if it was not properly disposed (Yang et al, 2010). In most developed countries, like European countries, WAS were conventionally treated by concentration and anaerobic digestion, which would account for 60% of the total operating cost of WWTPs (Campos et al, 2009), and that could not be accepted by many developing countries. Therefore, cost effective or towards reuse technologies for WAS disposal need to be developed.…”