Research On The Treatment Effects Towards Sanitary Sewagy Using The Novel SBR Based On The Immobilized Algal-bacterial Symbionts System

China's rapid progress in urbanization today,along with the deterioration of water resources.So the urgent need for efficient and stable sewage treatment process.In this paper,the sludge was mixed with microalgae,and the effluent was treated with SBR reactor by combining the nitrogen and phosphorus efficiency of algae.The SBR system was explored in depth.Make full use of the synergistic effect between activated sludge and algae.Can solve the SBR in the nitrogen and phosphorus removal of the shortcomings,but also can further reduce energy consumption,and the resources in the sewage to be synchronized recycling.But the bacteria and algae symbiosis system is still facing serious loss of algae,easy to cause secondary pollution problems.In order to further improve the water treatment efficiency of algae symbiotic system and reduce the loss of algae,and in the reactor by adding modified filler.On the basis of this,the effects of illumination time and light intensity on the symbiosis system were studied,and the optimum parameters were determined and the stability of the immobilized algae SBR was studied.First,the effect of modified filler on the algae reactor was studied.In order to reduce the loss of algae and promote the growth of algae,the filler is fed into the reactor to immobilize the growth.Six groups of reactors were set up,the control group had no filler,one group was fed with ordinary packing,and the other four groups were added with different concentration gradient modified filler.Samples were taken in the same time range every day,and then the effluent quality of the reactors in each group and the chlorophyll a content in the system were determined.To determine the growth of algae and treatment efficiency.The results show that when the mass ratio of resin to luminescent material is 3: 1,the removal effect of pollutant in the system is the best water treatment effect and algae growth condition,and the treatment effect of ammonia nitrogen is over 85%.Second,the light has an important effect on the symbiotic system.Therefore,we should focus on the effect of light intensity and time on the efficiency of nitrogen and phosphorus removal in the reactor.The stability of the reactor and the activity of the algae were determined by the investigation of the effluent quality of the reactor during the operation and the change of the chlorophyll a concentration in the algae.The experimental results show that when the light intensity is 4000 lux and the illumination time is 8 h,the water quality of the system is the best,and the sludge has better properties.The removal rate of COD was 91 %,the removal rate of total nitrogen was 88 %,and the removal rate of total phosphorus was 78%.Water quality are in line with the national development of sewage treatment water quality A standard.Finally,under the conditions of optimum lighting parameters,the other reaction conditions were constant and the reactor was operated continuously for a long period of time.The pure sludge SBR was set as the control group;Two groups of bacteria in the experimental group-algae SBR reactor,one without filler,one plus modified filler.The water quality of the system and the characteristics of sludge and other indicators to investigate.The results showed that the effluent quality of the bacteria-algae symbiotic SBR was stable,the removal rate of COD was 92.31 %,the removal rate of total nitrogen was 72.79 %,and the removal rate of total phosphorus was 75 %.The treatment efficiency was significantly due to the absence of filler plus the bacteria-algae SBR and pure sludge SBR.And the concentration of chlorophyll a in the effluent is low,which can effectively avoid the loss of algae.