The Research Of Internal Lectrolysis-Coagulation-Anaerobic Treatment For Organic Dying Wastewater

The article elaborated the status quo of the organic dying wastewater treatment from home and abroad. Based on the distinctive characteristic of organic dying wastewater such as high organic content, high chromaticity, hard to be biological degraded, we put great empHasis on the pretreatment of dying wastewater from experimental angle. After comparing internal electrolysis coagulation treatment with coagulation treatment from treatment effect and technology availability as well as cost, we decided to adopt the internal electrolysis coagulation treatment. We put forward the process of internal electrolysis-coagulation-anaerobic aerobic treatment and studied the treatment effect and affecting factor of this process when it was employed to treat the organic dying wastewater with high concentration and chromaticity. Meanwhile we made success in acclimating the biological membrane that can degrade the organic dying wastewater effectively through the proper method. After finishing experiments, we draw several conclusions as follows:haccording to the data:CODb/COD_cr=5%,it is obvious the room to degrade the wastewater by biomembrane is small, therefore we should not adopt biochemical treatment without pretreatment. The process of internal electrolysis-coagulation-anaerobic treatment has three steps. The first step is internal electrolysis coagulation treatment; the second one is anaerobic treatment. Through this step we can improve the degradability and reduce COD and chromaticity. The third step is aerobic treatment.2: we made consecutive experiments in the context of 60 min electrolysis and found out the COD is reduced by 30%-40% and chromaticity reduced by around 90%.3:we made consecutive experiments upon the condition that organic capability of the anaerobic treatment reactor is 1,3kgCOD/m.d, and found out the COD is reduced by 57%-62% and chromaticity reduced by 25-30%.4:we made consecutive experiments upon the condition that organic capability of the aerobic treatment reactor is 1.3kgCOD/m.d, and found out the COD is reduced by 75%-80% and chromaticity reduced by less than 20%.5: after the whole process, the organic dying wastewater can be treated well and both COD and chromaticity are reduced by more than 92%, therefore this process is feasible in the practical sense.