Research On The Process Design Of The Water Treatment Process Of The Village And Town Living In Jiangnan Water Village In Zhejiang Province

With the rapid development of social economy, the level of rural life is increasing day by day, and the growth of livestock and poultry, aquaculture, a lot of rural domestic sewage discharge, makes the water pollution and eutrophication of rivers and ponds problems such as more and more serious, plus the complex terrain of rural, discharge point dispersion, unsteady water, municipal sewage plant process and operating conditions are not suitable for use in the rural areas., huzhou city, this article through to the dojo township home bridge village of field investigations, sewage characteristics of this area are studied, and according to the local economic situation, the conditions of operation and management, design a set of suitable for local sewage treatment engineering solutions, solve the problem of current much-needed engineering need, provide reference and demonstration village rural sewage treatment engineering practice this area.In this paper, the main research contents and achievements are as follows:(1) The region sewage mainly comes from the farmhouse toilet flushing water, washing water, washing machine, shower drainage and other drainage, etc. The sewage containing cellulose, starch, sugar, organic material such as fat, protein, also contain nitrogen, phosphorus and other nutrients, the BOD5 concentration is about: between 100 and 250 mg/L. Domestic sewage contains a variety of microorganisms, the total number of bacteria in fresh domestic sewage in 5 x 105 ~ 5 x 106 / L, and contain a variety of pathogens. Suspended solids content in sewage is in commonly 200 ~ 400 mg/L. Due to give priority to with organic pollutants in sewage, sewage also contains many microbes at the same time, the decomposition of organic pollutants and sewage is unstable, biodegradable and easy rotten, if not treated directly discharge into the environment to cause pollution of the environment.(2) To give home a bridge village scattered the limitation of natural conditions and population distribution, processing pattern mainly includes single door handle, door handle, regional processing; Sewage treatment technology mainly includes the buried precipitation + anaerobic + artificial wetland, buried combination micro power A/O + artificial wetland, buried weak power integration A/O + artificial wetland type, buried steel concrete micro power A/O + artificial wetland.(3) Research shows that, after the house of shi bridge village on-the-spot investigation of rural domestic sewage treatment engineering, chooses treatment process of high efficiency and energy saving, simple maintenance and management, good treatment effect and effluent water quality is clear and no smell. Suitable for sewage treatment is widely used in rural life.