The present disposal routes of sewage sludge represent a critical environmental issue in Egypt. Recently, there has been an increasing concern about sewage sludge management due to the environmental risks, which resulted from the fast expansion of wastewater treatment plants without equal attention in dealing with the produced sludge. This paper discusses the current situation of sewage sludge ...

PAHs are widely distributed in the environment and pose a serious threat to ecological security human health. The P&A (Pseudomonas aeruginosa Alcaligenes faecalis) bacterium consortium obtained this study comes from oily sludge is reused for degradation of mixture sludge. Few articles pay attention reuse its degradation. solution efficient bacterial under different environmental conditions,...

Polyhydroxyalkanoate (PHA) is a new type of bio-polyester which expected to replace traditional petroleum-based plastics. The experiment was carried out based on anaerobic-microaerobic process. Firstly, the PHA accumulation capacity activated sludge under different pH conditions discussed, and then batch test nitrogen phosphorus limitation condition optimal pH. Moreover, content monomer nutrien...

This paper presents three new approaches to reduce excess sludge production in activated sludge systems: 1) modification of conventional activated sludge process with insertion of a sludge holding tank in the sludge return line; 2) chlorination of excess sludge so as to minimize excess sludge production; and 3) utilization of a metabolic uncoupler, 3, 3', 4', 5-Tetrachlorosalicylanilide (TCS) t...

Progressive cavity pumps are used in industry for the circulation of high viscosity fluids, such as crude oil and petroleum products, sewage sludge, oils, salt water, wastewater. Also known single screw pumps, these composed a rotor which has shape rounded screw, moves inside rubber stator. The stator an double helical internal surface which, together with rotor, creates that along rotor. movem...

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