Composite Flow Constructed Rapid Infiltration Efficiency Of Rural Domestic Sewage Treatment To Strengthen The Ecological Field

In view of the rural area of our country shortage of funds, lack of energy, lack of technology by low investment, low energy consumption, stable operation, maintenance convenient management of practical sewage treatment technology, is the main way to solve the problem of the current conditions of our country’s rural sewage pollution. CRI system has the characteristics of low investment, low cost, quick response, easy maintenance and so on. It is a practical technology of rural decentralized domestic sewage pollution control.In this study, relying on the national water pollution control and management of science and technology major projects-- "Henan Danjiang of watershed water security key technology research and demonstration", to guarantee the water quality safety as the goal, the CRI system total nitrogen and phosphorus removal rate is low, operation effect of unstable and other iSSues, the establishment of a combined flow artificial rapid infiltration field of ecological technology. Focus on the spray trickling filter and water distribution/fall dry coupling of a composite flow constructed rapid infiltration enhanced nitrogen removal technology, composite flow constructed rapid infiltration field of ecological vegetation enhancement technology for nitrogen and phosphorus removal, granular media enhanced phosphorus removal technology, solid organic carbon source corncob denitrification nitrogen removal technology. Through the experimental method, the experimental method, the experimental method of the rural sewage treatment efficiency enhancement technology is studied, and the mechanism, effect, influence factors and feasibility of the treatment of pollutants are studied. Research results show that:The spray height has a great influence on the removal efficiency of the drop filter. When the height of the spray height is 0.4m, the removal efficiency of the pollutant is the best. The influent interval is within the range of 0-36h.Through scReening of limestone, sponge iron, fire clay, quartz sand, rocks and other 5 kinds of typical phosphorus filler, determine the limestone and sponge iron is better. The phosphorus removal efficiency inCReased with the inCRease of pH value, temperature, dosage and other factors, but more than the setting value, it will appear the phenomenon of desorption. This study used limestone as the composite flow artificial quick infiltration of phosphorus removal unit in the ecological field.On 5 species of emergent maCRophytes on phosphorus testing, the results show that, reed, Lythrum salicaria, cattail, iris pseudacorus, Canna of sewage in TP removal rate were 44.7% in the above. Integrated plant growth status, landscape effect and demonstration project site needs, selection of Lythrum salicaria as artificial rapid infiltration ecological land system of phosphorus rich plants. Combined flow artificial rapid infiltration system of ecological field plant Lythrum salicaria after system of pollutants to improve the removal effect has a certain degree of, 氨氮, TN improve larger, TP is the second, CODcr removal rate inCReased minimum.Under the condition of wet dry ratio of 8h to 24h, the removal rate of 0.4m/d and CODCR in the range of 0.8m/d～TN, and the removal rate of and 氨氮 showed a trend of incReasing, while the TP and 0.8m/d showed that the removal rate deCReased gradually with the inCRease of hydraulic loading, but the wet dry ratio was 8h:32H and 8h:24h.Study on permeability of the system, trickling filter in operation in the proceSS of permeability coefficient almost did not change; due to the lower part of the water inlet, constructed rapid infiltration section in the middle and lower part of the filter permeability coefficient deCReased rapidly, the upper down minimum; ceiling phosphorus pool due to chemical precipitation reaction, the permeability coefficient deCReases rapidly.The cob as denitrification supplementary carbon source experiment, influent NO3--N concentration is 30mg/L, volume load is leSS than 0.24kgNO3--N/m3d conditions, the effluent NO3--N can be maintained at about 12mg/L.Using the above four kinds of methods to construct the compound flow constructed by artificial rapid infiltration of ecological field technology, the economic feasibility of rural decentralized sewage treatment, and the experimental results show that the technology of CODCR, ammonia nitrogen, TP, TN have good removal effect, the effluent can be stable to meet the actual needs of rural decentralized sewage treatment CJ25.1-89.