Study On Phosphorous Removal Using By Electrolysis Process And It Used In The Integrated Bioreactor

In present society, one of the main problems is environmental degradation and resource starvation. Water resources pollution has been the key factor which impedes our national economic sustainable development. Distributed sewage discharrge standard has not been satisfied by traditional sewage disposal system. This research applies electrochemistry into integrated bioreactor and develops a process of integrated bioreactor which is bearing impact load, easy and simple to handle with anoxic/anaerobic/oxic process.In this study, a system of electrocoagulation has been applied to the treatment of phosphate-contaminated water. The effectiveness of main operational parameters such as electrode materials, initial phosphorous concentration, electric current densiry, hydraulic retention time, initial pH and plate spacing were examined. In addition, phosphate removal efficiency and energy consumption were compared for among aluminum, aluminum-iron (aluminum and iron alternately as electrode) and iron electrodes. In accordance with influence plate spacing on phosphate removal efficiency system and energy consumption vs. time in different electrode materials, the optimum conditions for these parameters were found to be0.5cm as plate spacing and50min for equilibrium time. The results of the electrocoagulation application have shown that the maximum removal efficiency of88%was achieved using aluminum, and the minimum energy consumption of0.12kWhm-3was obtained with aluminum-iron at a current density of8mAcm-2, pH of7.0and plate spacing of0.5cm. Current density have key effect on removing phosphorous in sewage by electrolytic flocculation and with current density inreasing, energy consumption became higher. When hydraulic retention time was increased, the removal rate was enhanced and energy consumption was reduced, with the other conditions being constant. Moreover, pH also has huge impact on removing phosphorous from sewage using by electrocoagulation and pH reaches8is optimum.Phosphorous was removed using by micro-electrolysis process and Lower effluent phosphorus concentration was analysed by orthogonal experimental method. The results show that the sequence of influence on phosphorus removal was:the incoming phosphorus concentration> pH value> hydraulic retention time> sampling time> the volume ratio of iron and carbon. According to the removal rate, the best operating conditions for:phosphorus concentrations of32mg/L, sampling time of40min, hydraulic retention time for60min, pH of8, the volume ratio of iron and carbon of2:1.Electrocoagulation was applied into the sedimentation tank of integrated bioreactor, in real-life situations, organics, TN, and TP removal efficiencies, as well as economic potential should all be considered in optimizing hydraulic retention time (HRT), organic load (OLR) and return sludge ratio (R). The optimum HRT is8hours and at the same time, the removal rate of COD, TN and TP is95%,65%and95%, respectively. The COD, TN, and TP removal efficiencies from synthetic wastewater were90,74, and93%, respectively, at an OLR of2.7g.L-1.d-1. The removals of COD, TN, and TP in the effluent were95,72, and98%respectively, at the controlled R range of75%. The system established in the present study had a strong capability of shock organic loading resistance. Each tank in the reactor also had distinct abilities in removing organic matter, TN, and TP at the HRT of8h, R of75%and OLR of2.7g.L-1.d-1. The removal ratio of COD, TN and TP were15,20and30%in the electrolytic cell caused by electrocoagulation. The modified system was proven valuable, effective, and suitable for synthetic wastewater treatment.Synthetic wastewater was treated using a novel system integrating the anoxic/anaerobic/oxic process, a micro-electrolysis bed, and complex biological media. The performance of the system was optimised by considering the influences of three major controlling factors, namely, HRT, OLR, and R. The optimum HRT is8hours and at the same time, the removal rate of COD, TN and TP is95%,63%and87%, respectively. The COD, TN, and TP removal efficiencies from synthetic wastewater were90,74, and88%, respectively, at an OLR of2.7g.L-1.d-1. The removals of COD, TN, and TP in the effluent were95,70, and94%respectively, at the controlled R range of75%. In this system, organics, TN, and TP were primarily removed from the anoxic tank regardless of the operational condition.