Electric Flocculation Coupled SBR Process For The Treatment Of Rural Domestic Sewage

With the country paying more and more attention to the revitalization and development of rural areas,the requirements of the rural ecological environment have been gradually raised,and the treatment standards of domestic sewage in rural areas have been gradually raised,so improving the treatment effect of domestic sewage in rural areas of China has become an urgent problem to be solved.This experimental study explores the effects of the coupling process on the factors of electroflomaculation by coupling SBR with the electroflocculation process,compares and analyzes the operating conditions and biome composition of the SBR process,and also investigates the decontamination efficiency and energy consumption analysis under extreme water intake conditions.The static beaker comparison test examined the denitrinization effect of aluminum plate electrifying in the aeration segment,and in 12 hours of non-intermittent aeration and power-up,the results showed that the aeration group with aluminum plate on was 5.58%higher than the aeration group only in ammonia nitrogen and the total nitrogen removal rate was 5.58%and 5.21%,respectively.On this basis,a small test test is carried out to energize the condensation in the aeration section to explore the effects of current density and plate power-on time.The coupling process system has the best denaturation at a current density of2.5A/m~2,with an average removal rate of 82.63 percent of total nitrogen.The power-on time has little effect on the system decontamination efficiency,but decreases with the power-up time and the total nitrogen removal efficiency.The SBR-coupled flocculation process and the SBR process were performed in a hypoxia-aerobic-hypoxia mode for horizontal comparison and analysis on drainage ratio,aeration frequency,and carbon-nitrogen ratio and biome detection.The test results show that the increase of drainage ratio will lead to an increase in water load,increase the amount of activated sludge unit treatment in the two systems,and affect the effectiveness of decontamination.The increase of the number of stop exposures makes the distribution of carbon sources more uniform,the utilization rate of microorganisms in activated sludge increases,and the efficiency of decontamination is improved.Under different low-carbon nitrogen ratio conditions,the lower the carbon-nitrogen ratio,ammonia nitrogen removal efficiency will increase,the total nitrogen removal efficiency will be slightly reduced.SBR-coupled flocculation process is significantly better than SBR process in decontamination efficiency,and water discharge can meet the standard of rural sewage treatment facilities.In the community analysis,the SBR-coupled flocculation system is slightly higher than the SBR system community richness and community uniformity,and the two systems account for a larger proportion of anti-nitrification reactions.Under extreme water inlet conditions,the SBR coupled electroflocutulation process operates under optimal working conditions,and the overall decontamination efficiency is reduced at low temperature inlet water;Under the conditions of partial acid and partial alkali inlet water,the system’s nitrogen removal efficiency is reduced.However,the water output effect of the SBR coupling electric flocculation process is still relatively stable and can reach the first-class discharge standard of rural domestic sewage treatment facilities in Heilongjiang Province.