Study Of Humus Activated Sludge Process Degrading Particulate Organic Matter On The Characteristics Of Sludge

Particulate organic matter is an important part of modern urban sewage,it has a large granularity,hard to degrade and other characteristics,traditional activated sludge method is difficult to effectively degrade such sewage,therefore,it is proposed that the humification ecological base strengthens the sewage treatment process,the process has a good effect on improving the efficiency of pollutant removal and the sedimentation and dehydration of activated sludge.This paper is based on the investigation of the effectiveness of humic soil degradation of particulate organic wastewater,by setting different temperatures,different modes of operation,in-depth study of the effect of humic sludge on the performance of sludge in the degradation of particulate organic matter,at the same time,the effect of extracellular polymer on sludge sedimentation and dehydration was also investigated,provide a certain theoretical basis for the further improvement and development of the process.At a water temperature of 10?,comparison of built-in SBR and conventional SBR treatment of particulate organic wastewater effect,the built-in SBR COD,TP,NH₄⁺-N removal rates increased by 2.76%,3.3%,7.37%.The average value of the built-in SBR CST is smaller than that of the traditional SBR 8s,sludge dewatering performance is better.At a water temperature of 20?,NH₄⁺-N removal rate of built-in SBR is 3.5%higher than that of conventional SBR,TP removal difference 0.9%,COD removal rate difference of 2%.It can be seen from the size distribution data of water in and out,adding humic soil can effectively improve the efficiency of sludge degradation of particulate organics,reduce the particle size of particulate organics in the effluent.Through the SVI inspection of sludge,the built-in SBR activated sludge sedimentation is better than the traditional SBR.Analysis of the EPS content in sludge,built-in SBR has lower EPS content than traditional SBR,adding humic soil can improve the performance of activated sludge.Compare humus sludge treatment of dissolved organic wastewater and particulate organic wastewater efficiency.As can be seen from the test results,particulate organic matter make humus sludge has high nitrification activity,humus sludge treatment of dissolved organic wastewater effluent COD,TP lower.The sedimentation and dehydration of humic sludge with dissolved organic matter as matrix are better than that of granular,SVI value and CST value are less than the latter.Particulate organic matter increases the content of protein and polysaccharide in EPS of humic sludge during hydrolysis.Compare built-in and external operation mode,humus sludge degrades particulate organic matter,built-in SBR humus sludge sewage treatment efficiency better,the average removal rates of COD,TP,NH₄⁺-N were higher than those of external1.4%,3.4%,1.6%.In different aerobic and anaerobic modes of operation,built-in SBR aerobic/anaerobic operation of particulate organic wastewater treatment better,the average removal rates of COD,TP and NH₄⁺-N were higher than anaerobic/aerobic1.2%,2.4%and 3.6%.The built-in SBR sludge settles better than the external SBR,the built-in SBR reactor has a relatively small SVI value.CST measurement results show,the built-in SBR sludge has better dewatering performance,the CST value is 2.8s less than the average of the external SBR.Aerobic/anaerobic operation,the sedimentation of humic sludge is better than anaerobic/aerobic,the former SVI value is relatively small CST measurement results show,aerobic/anaerobic operation of the humic sludge dewatering better,the CST value is 6.5s less than the average anaerobic/aerobic value.In summary,addition of humic soil can improve the sedimentation and dewaterability of activated sludge,improve the efficiency of degrading particulate organics.