High Salinity Wastewater Biological Treatment Microbial Dynamic Change And Its Correlation With The Performance Of Sludge Research

At present,the high-salinity wastewater biological treatment research focuses on a variety of different processes(such as SBR,A/O,MBR,etc) of wastewater under the conditions(such as NH₃-N,COD_cr,etc) of the various parameters on the removal of the differences,and the domestication of the activated sludge from the early to mature, as well as a variety of external parameters sludge micro-organisms with changes in different periods,as well as the advantages of micro-organisms rarely change.For this problem,this paper as a carrier reactor,the main study the early domestication of fresh water sludge,sludge formation,growth of sludge,sludge at all stages of maturity, such as the representation of biotechnology and to identify which groups the advantages of biological;Under the conditions of different concentrations(10%,20 %,30%,50%) of sea water a symbol of the advantages of biological groups and groups of advantages of biological communities;Different external conditions(such as pH,DO,HRT,temperature)on the impact of micro-organisms in wastewater and advantages of the changes in microbial groups.The relationship between traits and microorganisms under high salt conditions.These researches were promotive to the biological treatment of high saline wastewater.In the beginning of the domestication,the color of sludge was black,the surface of the sludge was winded by filamentous bacteria,the activity of the sludge was poor,so was the settlement's performance.NH₃-N and COD's removals were both between 3 %and 10%,the representative microbial were filamentous bacteria an dissociative bacteria.by about 9 days' domestication,the sludge came to forming stage,the color of sludge changed to taupe,the activity and settlement's performance were both enhanced,NH₃-N and COD's removals were both between 10%and 30%,the representative microbial were bathing Infusorian and Suctorian.By about 18 days' domestication,the sludge came to increasing stage,the color of sludge changed to tawny,the activity and settlement's performance were both markedly increased, NH₃-N and COD's removals were both between 30%and 80%,large numbers of Protozoa appeared,the representative microbial were Vorticella and Epistylis.By about 17 days' domestication,the sludge came to autumn,the color of sludge changed to saffron yellow,NH₃-N and COD's removals were both stabilized at a high level(80%to 89%),Protozoa rapid propagation.The representative microbial were Vorticella and Rotifer.After the sludge came to autumn and the removals of NH3-N and COD stabilized at about 85%,appended ten percent's sea water,the salinity's increasing affected the microorganism,the number of Vorticella and Rotifer slightly reduced,NH3-N and COD's removals reduced to about 82%,but Vorticella and Rotifer were also the dominant microbial.By about 10 days' domestication,NH3-N and COD's removals raised to about 85%,we began to append twenty percent's sea water NH3-N and COD's removals reduced to about 78%,the number of Vorticella and Rotifer did not appear significant reduction and they were also the dominant microbial. This shows that Vorticella and Rotifer had a certain degree of impact on the ability of salt.By about 10 days' domestication,the removals of NH3-N and COD stabilized at about 84%,we began to append thirty percent's sea water.NH3-N and COD's removals reduced to about 72%,the number of Vorticella and Rotifer had a greater decrease.This shows that the higher the impact of salinity on the larger micro-organisms.By about 12days' domestication,the removals of NH3-N and COD stabilized at about 85%,we began to append fifty percent's sea water,the removals of NH3-N and COD redused to about 60%rapidly and,the number of Vorticella and Rotifer had a great decrease,This shows that large changes in salinity and high salinity on the growth of micro-organisms have greater impact.By about 20days' domestication,the removals of NH3-N and COD radual increase and stabilized at about 85%,VorticeUa and Rotifer significant increased.This shows that Vorticella and Rotifer had a certain degree of impact on the ability of salt;they had been trained to salt-tolerant microorganisms.After the removal of NH3-N and COD stabilized,the pH(7.0,7.5,8.0,and 8.5) was changed every 5 days,the effect ofpH for the removal of NH3-N and COD was studied as well as microorganisms.The result was that the most appropriate pH was 8.0 to 8.5.The consistency of DO(0.5 mg/L,1.0 mg/L,2.0 mg/L,3.0 mg/L) was changed every 5 days,the effect of the consistency of DO for the removals of NH3-N and COD was studied as well as microorganisms,the result was that the most appropriate DO's consistency was about 2.0 mg/L.The HRT(6h,8h,10h,12h,and 15h) was changed every 5 days,the effect of HRT for the removals of NH3-N and COD was studied as well as microorganisms,the result was that the most appropriate HRT was 12h.With the ambient temperature slowly debasing,the effect of temperature for the removal of NH₃-N and COD and microorganisms was studied and the result was that the most appropriate temperature was 19℃.Added fifty percent seawater to the sludge which was not domesticated,then observated the changes of the microorganism from the beginning of the domestication to the end,discussing the relation between the microorganism and the characters of the sludge.Improved the NH3-N's concentration and kept the COD's concentration the same,observating the changes of the microorganism and discussing the the relation between the microorganism and the NH₃-N.Then,improved the COD's concentration and kept the NH₃-N's concentration the same,observating the changes of the microorganism and discussing the the relation between the microorganism and the COD.