The loading and removal efficiency of 16 US EPA polycyclic aromatic hydrocarbons (PAHs) were examined in an inverted A²/O wastewater treatment plant (WWTP) located in an urban area in China. The total PAH concentrations were 554.3 to 723.2 ng/L in the influent and 189.6 to 262.7 ng/L in the effluent. The removal efficiencies of ∑PAHs in the dissolved phase ranged from 63 to 69%, with the highes...

MFC centered hybrid technologies have attracted attention during the last few years due to their compatibility and dual advantages of energy recovery and wastewater treatment. In this study, a MFC was integrated into a dewatered alum sludge (DAS)- based vertical upflow constructed wetland (CW). Powder activate carbon (PAC) was used in the anode area in varied percentage with DAS to explore its ...

The inactivation of naturally occurring bacterial indicators and bacteriophages by thermal treatment of a dewatered sludge and raw sewage was studied. The sludge was heated at 80 degrees C, and the sewage was heated at 60 degrees C. In both cases phages were significantly more resistant to thermal inactivation than bacterial indicators, with the exception of spores of sulfite-reducing clostridi...

The ecology of microbial populations in water and wastewater environments has been extensively studied (Barcina et al., 1997; Scott et al., 2002; Sinton et al., 1994). Commonly, the reduction of fecal indicator bacteria is attributed to biotic and non-biotic factors such as predation, nutrient scarcity, temperature, osmotic stress and visible light. But these factors could affect these bacteria...

Sewage sludge proves to be difficult to dewater due to its composition and biological nature, and it is unsuitable for disposal with high moisture content. In the present work, sewage sludge is dewatered by the thermal compression, which shows unique separation advantages of various materials, and the effects of applied temperature and pressure on the dewatering performance are investigated. Th...

Abstract Dairy processing sludge is currently a bio-based fertiliser being spread to grassland without knowledge pertaining its phosphorus (P) or nitrogen (N) replacement value. This creates uncertainty of desired crop yield achievement and unproductive nutrient recycling also poses great challenge the dairy milk industry in promoting their food by-product as valuable recyclable fertiliser. The...

The seafood processing industries produce large amounts of wastewater sludge in Thailand. Most is dewatered and then sent directly to landfills without utilization nor resource recovery. dried sludge, having a gross calorific value (GCV) higher than 21.9 MJ/kg, might be worthwhile utilize as refuse-derived fuel. However, the critical obstacle its high moisture content 87.4 wt%. This study inves...