Enhancing the performance of sequencing batch reactors by adding crushed date seeds to remove high concentrations of 2,4-dinitrophenol.

Wastewater treatment systems using simultaneous adsorption and biodegradation processes have been successful in treating toxic pollutants present in industrial wastewater. The goal of this investigation was to assess the effectiveness of date seeds in reducing the toxic effects of 2,4-dinitrophenol (DNP) on activated sludge microorganisms. Two identical sequencing batch reactors (SBRs) (4-L glass vessel), each with a 3.

Aerobic selectors in slaughterhouse activated sludge systems: a preliminary investigation.

Filamentous bulking at a slaughterhouse activated sludge treatment plant significantly reduced mixed liquor settling properties, which caused many operational problems and worsening in effluent quality. The main cause of this condition was attributed to significant levels of influent readily biodegradable COD, which was present primarily in the form of organic acids. An aerobic selector was chosen to eradicate the usual bulking incidents of slaughterhouse wastewater treatment plants.

Coagulant toxicity and effectiveness in a slaughterhouse wastewater treatment plant.

Attempts were made in this study to examine the toxicity of polymer/alum addition to the aeration tank effluent prior to sludge flotation as practiced in a slaughterhouse wastewater treatment plant. Based on the Microtox toxicity assay, alum at concentrations 100-200 mg/L was found to slightly increase the toxicity level of slaughterhouse wastewater effluent. However, at higher concentrations (300-1000 mg/L), significant residual chronic toxicity remained in all slaughterhouse wastewater effluents, independent of the treatment process.

Performance-based characterization of a contact stabilization process for slaughterhouse wastewater.

This paper evaluates the effluent treatment plant of a slaughterhouse in Hawalli City, Kuwait processing 1100 heads of livestock a day. Results indicated that the proposed process effectively reduces pollution potential of slaughterhouse wastewater. Influent Chemical Oxygen Demand (COD) ranged from 3335 to 7580 mg L(-1), of which approximately 30% were in the form of suspended solids (SS).