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Sodium hypochlorite (NaOCl) is a common cleaning agent in ultrafiltration (UF) treatment. Despite the efficiency of fouling removal, acceleration of degradation and loss in membrane integrity are caused. In this paper, hollow fiber membranes made from polyvinylchloride (PVC) were treated with different concentration of NaOCl solution for different periods of time, and both virgin and polluted membranes...
The method of magnesium ammonium phosphate (MAP) precipitation was used to remove high concentration of ammonia-nitrogen wastewater. A lab scale study about diosgenin wastewater was conducted to optimize the reaction condition by single factor experimentation. MgCl2·6H2O and Na2HPO4·12H2O were used as precipitants. The experimental results demonstrated that the removal rate of ammonia nitrogen was...
H2O2-based advanced oxidation processes (AOPs) and SO4·--based AOPs were proved novel and promising techniques in treatment of wasterwater. Microwave (MW)-assisted hydrogen peroxide (H2O2), peroxymonosulfate (PMS) and persulfate (PS) were used to dispose of COD in landfill leachate. Oxidant dosage and chloride concentration were investigated as the major operating conditions. The initial COD is 4062...
According to the characteristics of contaminated surface water, a stain of Micrococcus sp. (Micrococcus sp. N3-9P) that could remove CODCr efficiently was picked out from the slowly flowing oil-polluted riverbed sludge in Liaohe Oil Field, and then it was immobilized by chemical embedding technology. Through the conditional tests of immobilizing parameters, an improved co-immobilization technique...
The present work consisted in the study of Titania/Zeolite catalyzed ozonation for nitrobenzene removal. Catalytic activity of the supported TiO2 is strongly influenced by the heat treatment temperature. Titania/Zeolite calcined at 600??C showed the best activity. An approximate increase of 21% in removal rate was achieved for catalytic ozonation compared with single ozonation. Kinetic study of dissolved...
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