High-efficiency composite hydrolysis acidification pool used for sludge reduction

Abstract

Sludge is a byproduct of sewage treatment, a great deal of sludge generated causes the increasingly severe secondary pollution, and the sludge treatment cost is high, so the sludge becomes a bottleneck problem in the urban sewage treatment industry. The invention provides a high-efficiency composite hydrolysis acidification pool technique used for sludge reduction, and belongs to the technical field of water treatment. The technique can be used as a pretreatment process of two-stage biochemical treatment in a sewage plant or independently used as a sludge reduction process. A high-efficiency mass transfer guiding plate and a turbulent generator are arranged in the pool to enhance the mass transfer effect of solid-liquid two-phase reaction; meanwhile, a filler is filled in the pool, so biomass in the reactor is increased, the efficiency of degrading residual sludge by hydrolysis acidification bacteria is improved, and the sludge to be finally treated is reduced.

Description

Technical field: [0001] The invention relates to an improvement of sewage treatment process equipment, belonging to the technical field of water treatment. Background technique: [0002] Sludge is a by-product of sewage treatment. At present, the annual discharge of dry sludge in my country is about 1.3×10 6 t, and is increasing at a rate of more than 10%. The massive generation of sludge has also caused increasingly severe secondary pollution, and has become a bottleneck problem in the urban sewage treatment industry. One of the most important reasons for the low rate of sludge treatment and disposal is the limitation of investment and operating costs. Therefore, sludge reduction and resource utilization have always received great attention. [0003] Sludge reduction was proposed in the 1990s. It is a method of discharging sewage treatment facilities to the outside by means of physical, chemical, and biological methods, relying on the reduction of microbial productivity ...

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Problems solved by technology

[0004] The patent "anaerobic baffle reactor (patent number 200420068573.X)" adopts a closed anaerobic baffle reactor, which has achieved good sewage treatment effect, but does not involve sludge reduction; the patent "a Baffled plate reactor and its sewage treatment method (Patent Publication No. CN1850665A) "Using partitions to divide the reactor into multiple compartments, and controlling the aerobic and anaerobic series alternate operating environment to achieve sludge reduction, but there are The growth environment of aerobic bacteria and anaerobic bacteria is not ideal, and the energy consumption is high; the patent "device for reducing excess sludge production by using biological predation (patent publication No. The principle of biological predation is used, and there are problems such as low reaction efficiency and long residence time; the patent "high-efficiency composite hydrolysis acidification tank with both sewage treatment and sludge reduction (patent publication number CN 101205108A)" improves the transmission of the reaction. quality effect, but there is the problem of the loss of hydrolytic acidification bacteria in adjacent compartments, which affects the living environment of hydrolytic acidification bacteria

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