Method for reducing sewage concentration of pretreatment tank

Abstract

The invention discloses a method for reducing sewage concentration in a pretreatment tank, which is characterized in that all functional units are connected in series in the process: high-concentration sewage firstly enters a dilution area, water in the dilution area is detected by a detection part instrument, the sewage enters the pretreatment tank for treatment if the concentration index is normal, and the sewage enters the pretreatment tank for treatment if the concentration index is normal; pretreated sewage sequentially flows in each stage of unit of the biochemical pool and then is treated by the membrane pool, treated effluent finally enters the water storage area, part of the effluent in the water storage area is directly discharged or recycled, and part of the effluent is returned to the dilution area as dilution water. Wherein when the concentration index of water in the dilution area is displayed to be abnormal through the detection part, the dilution system is started, and a tap water supply pipeline, a sludge drying process cooling water pipeline, an air blower cooling water pipeline and a branch pipeline of the water storage area are opened. The method has the advantages of simplicity in operation, flexible process and high adaptability, and is suitable for being popularized in vast rural areas in China.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for reducing the concentration of sewage in a pretreatment pool. Background technique [0002] To do a good job in sewage treatment, we must first understand the water quality parameters of sewage. Usually, the monitoring of water quality parameters needs to collect water samples on site and send them to the laboratory for chemical analysis, spectrophotometry and other methods to measure one by one. The monitoring data in this way is highly accurate, but the project is single, time-consuming and laborious, and cannot be completed on the spot. It is also possible to use the electrode type water quality rapid tester to directly insert the water sample for detection, which is convenient and timely. However, most of the existing electrode-type rapid water quality measuring instruments can only detect a single indicator, and cannot monitor on-line in real time. Onl...

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Problems solved by technology

For example, high concentrations of COD and NH in the influent 3 It will lead to the rapid consumption of dissolved oxygen (DO) in the biochemical pool, the water body is in an anaerobic state, the nitrification reaction is suspended, the system denitrification efficiency is significantly reduced, and a low treatment efficiency area is formed at the front of the biochemical pool; A large amount of accumulation, the low treatment efficiency area will gradually increase along the direction of water flow, and eventually lead to the low efficiency level of the entire sewage treatment process; the high concentration of NH3 in the water will also inhibit the activity of plants and cause plant root corruption. The above reasons lead to the traditional sewage treatment process Difficult to be directly used for high-concentration sewage discharge, but only for advanced treatment of low-concentration sewage

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