The physical-chemical properties of activated sludge, such as flocculating ability, hydrophobicity, surface charge, settleability, dewaterability and bacteria extracellular polymer substances (EPS), play vital roles in the normal operation of wastewater treatment plants (WWTPs). The nanoparticles released from commercial products will enter WWTPs and can induce potential adverse effects on acti...

Separately collected organic fraction of municipal solid waste, also known as biowaste, is typically used to fill the available capacity digesters at wastewater treatment plants. However, this approach might impair use ensuing digestate for fertilizer production due presence sewage sludge, a contaminated substrate. Worldwide, unsorted household i.e. residual still disposed in landfills or incin...

Municipal and industrial wastewater treatment plants produce large amounts of sludge. This excess sludge is an inevitable drawback inherent to the waste activated sludge process. Both the reduction of the amount of sludge produced and improving its dewaterability are of paramount importance. Novel pre-treatment processes have been developed in order to improve sludge dewatering, handling and di...

The effects of the molecular weight (MW) and charge density (CD) of cationic polyacrylamide (CPAM) on sludge dewatering and moisture evaporation were investigated in this study. Results indicated that in sludge conditioning, the optimum dosages were 10, 6, 6, 4, and 4 mg g(-1) CPAM with 5 million MW and 20% CD, 5 million MW and 40% CD, 3 million MW and 40% CD, 8 million MW and 40% CD, and 5 mil...

Anaerobic digestion (AD) appears to be a popular unit operation in wastewater treatment plant treat waste activated sludge (WAS) and the produced methane gas can harvested as renewable energy. However, WAS could inhibit hydrolysis stage during AD hence pre-treatment is required overcome issue. This paper aimed study effect of electrochemical (EP) towards efficiency using titanium coated with ru...

Non-sewered sanitation is currently dependant upon pit latrine emptying, the safety of which compromised by high costs faecal sludge transport to centralised treatment facilities. Transport in turn hindered complex rheology sludge. This study therefore characterised compressional fresh faeces and modelled implications for passive (gravity) or mechanical (forced) solid/liquid separation. informs...

VERTADTM is an auto-thermophilic aerobic digestion process, employing a subsurface vertical reactor to aerobically digest mixed primary and secondary wastewater treatment solids. High metabolic activity results in heat generation, which enables the production of Class A Biosolids at short solids retention times (SRT). Currently the Technology Assessment Program of the King County Wastewater Tre...

Microwave heating is a dielectric heating process, in which heat is generated via the interaction of dielectric materials with electromagnetic radiation. The dielectric constant is a measure of the material’s capacity to retard microwave energy as it passes through, while the loss factor is a measure of the material’s capacity to dissipate the energy. The materials with high loss factor are eas...