Treatment system and method of township domestic wastewater

Abstract

The invention discloses a treatment system and method of township domestic wastewater, and belongs to the technical field of wastewater treatment. The wastewater treatment system comprises a deslagging tank, a sedimentation tank, a lift pot, a multistage moving-bed biological membrane reactor, a pipeline type mixer, a fully automatic dosing machine, a settling tank, a filter, a sterilizer, a recycle water storage tank, a secondary sedimentation tank, a Babbitt gauge tank, a sludge storage tank, a sludge dewatering machine and a fan. The invention also discloses a treatment method of township domestic wastewater. The treatment system of township domestic wastewater disclosed by the invention can adapt to various complicated township wastewater treatment, has strong shockproof load capacity and solid SS hydrolysis capacity, high efficiency in denitrification and dephosphorization, low operating cost and stable treatment effect, and ensures that the effluent water quality achieves the primary A standard according to the national GB18918-2002 Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant.

Description

technical field [0001] The invention relates to a system and method for treating domestic sewage in villages and towns, and belongs to the technical field of sewage treatment. Background technique [0002] Problems existing in the existing township domestic sewage treatment technology: (1) The sewage collection rate is low; (2) Rain and sewage are not separated; (3) The amount of sewage varies greatly (the amount of sewage discharged at different times of the day is different); (4) Large fluctuations in water quality (such as mixed with high-concentration sewage from small-scale food processing, slaughterhouses, and retail farming); (5) Difficult operation and maintenance (such as lack of professional and technical personnel management); (6) Many existing township sewage treatment plants are Built according to the design concept of municipal sewage treatment, the initial investment is too large (more than 10 million yuan is required to treat 500 tons of sewage per day), and ...

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Problems solved by technology

[0002] Problems existing in the existing township domestic sewage treatment technology: (1) The sewage collection rate is low; (2) Rain and sewage are not separated; (3) The amount of sewage varies greatly (the amount of sewage discharged at different times of the day is different); (4) Large fluctuations in water quality (such as mixed with high-concentration sewage from small-scale food processing, slaughterhouses, and retail farming); (5) Difficult operation and maintenance (such as lack of professional and technical personnel management); (6) Many existing township sewage treatment plants are Built according to the design concept of municipal sewage treatment, the initial investment is too large (more than 10 million yuan is required to treat 500 tons of sewage per day), and its municipal sewage treatment technology is difficult to adapt to the current situation of township sewage water volume changes and water quality fluctuations, resulting in unstable operation and Factors such as higher operating costs

The operating cost of this process is relatively low, the disc production is complicated, the climate has a great influence on this process, and the effect of phosphorus removal is poor

Due to large fluctuations in water quality and flow of township sewage and poor impact load resistance, it is easy to cause sewage treatment failure

[0007] (4) MC-MBBR method: It is a multi-stage composite moving bed biofilm reactor (MC-MBBR) developed on the basis of the oxidation ditch process. The dominant strain starts with strengthening the microbial metabolic function and improving the coagulation and sedimentation performance of activated sludge. It has the function of synchronous nitrification and denitrification, and has achieved good nitrogen and phosphorus removal effects while degrading organic pollutants. However, from the operation examples in the past two years It can be seen that the effect of nitrogen and phosphorus removal is general. The main reason is that when township sewage is mixed with high-concentration sewage from small-scale food processing, slaughterhouses, and retail aquaculture, the impact load resistance is poor, and the removal rate of SS, N, and P in sewage cannot reach It meets the first-class B standard stipulated by the state, but its design concept is very advanced, less investment in equipment, less land occupation, simple operation and management, no need for professional and technical personnel, low operating cost, and short construction period

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