Study On The Design Of Siphon Aeration System And The Treatment Of Landscape Water Pollution

As one of the most common water bodies,landscape water is closely related to our life,but the pollution of landscape water is more and more common.Landscape water all over the city,but the pollution level is relatively low,in the process of governance should choose simple process,low cost processing technology.Physical method is a temporary solution,chemical method is easy to produce chemical residue,biological method of treatment,is the long-term stability of the law.Based on the idea of biological treatment of landscape water,this paper developed a siphon biological aerated filter?Siphon Biological Aerated SBAF?for landscape water treatment.Compared with the traditional biological aerated filter,the biggest feature of SBAF is that the aeration equipment such as fan is omitted.The utility model makes use of the potential energy of the water to carry out aeration,and realizes the integration of the intake and the air intake through the water inlet mode of the siphon.The Campus Landscape Water Engineering University of Anhui as the experimental raw water with ceramsite filler,the SBAF hydraulic loading,gas water ratio,height of filter material as the operating parameters,to explore the SBAF of landscape water ammonia nitrogen,COD_Mn and turbidity removal effect,SBAF obtains the best operation parameters.Under the optimum operating parameters,the impact load capacity of SBAF was investigated by changing the concentration of ammonia nitrogen and COD_Mn.In addition,the backwash of the filter is discussed.The main conclusions are as follows:Based on the theoretical derivation of SBAF,it is concluded that the theoretical gas water ratio of SBAF is only related to the drop of the liquid level and the depth of the filter,that is,the ratio of gas to water?L-H?/H,L is the height of the pool and the bottom of the filter,the depth of the filter H.The hypothesis is verified by the gas water ratio test.In addition,by comparing the dissolved oxygen concentration in the influent and effluent,the results show that SBAF has the effect of increasing dissolved oxygen.In this experiment,the SBAF system was constructed by using the method of natural film hanging,and the time of hanging film was 15 days.After the normal and stable operation of SBAF,we can find the best operating parameters by changing the operating conditions of SBAF,such as the hydraulic load,the gas water ratio,the filter material height and so on.After determining the optimal operating parameters of SBAF,by changing the impact load of SBAF,we can see that SBAF has a strong adaptability to the change of influent ammonia nitrogen and COD.As for the impact load of ammonia nitrogen,the removal rate of ammonia nitrogen and COD_Mn was better.For the organic load,the removal rate of COD_Mn increased,while the ammonia nitrogen removal rate tended to decline.However,the removal rate of ammonia nitrogen was 61%.The above results show that SBAF has a strong ability to resist impact load.Due to the special structure of the SBAF,it determines the special way of back flushing.It can be used to carry out back flushing by means of mechanical vibration.SBAF has a backwash period of 15 days,and the recovery ability of SBAF is faster after backwashing.One day later,the removal rate of COD_Mn.was significantly increased,and the removal rate of COD_Mn and ammonia nitrogen removal rate after backwashing were greater than that before backwashing.Finally,the economic feasibility analysis is carried out,taking the campus water of Anhui Engineering University as an example,by comparing with the BAF process,we can know that the SBAF has lower operating costs and lower operating costs.