Device and method for sludge fermentation coupled with short-range denitrification in series with two-stage anaerobic ammonium oxidation to achieve sludge reduction and total nitrogen removal

Abstract

A device and method for sludge fermentation coupled with short-range denitrification in series with two-stage anaerobic ammonium oxidation to realize sludge reduction and total nitrogen removal belong to the field of sewage biological treatment. The device includes a raw water tank, a sludge storage tank, a nitrifying liquid water tank, an intermediate water tank, two SBR reactors, and a water outlet tank. The remaining sludge enters the short-range denitrification reactor coupled with sludge fermentation, and the refractory organic matter in the sludge is converted into easily degradable organic matter through fermentation; then the nitrification liquid enters the short-range denitrification reactor coupled with sludge fermentation, and the fermentation product is used as the carbon source The reaction completes the accumulation of nitrous; finally, the effluent of the reactor enters the anammox biofilm reactor together with the domestic sewage to realize the removal of total nitrogen. This method combines sludge fermentation with short-range denitrification and anammox in series, which not only reduces the cost of sludge disposal but also saves carbon sources, and at the same time provides more suitable living conditions for anammox bacteria, so as to achieve sludge Weight reduction and total nitrogen removal.

Description

technical field [0001] The device and method for sludge fermentation coupled with short-range denitrification in series with two-stage anaerobic ammonium oxidation to realize sludge reduction and total nitrogen removal in the present invention belong to the technical field of sewage biological treatment and are used to realize the harmless reduction of excess sludge A test device and method for simultaneous removal of total nitrogen. Background technique [0002] With the development of industry and the improvement of residents' living standards, nutrients such as nitrogen and phosphorus in water bodies increase accordingly, and eutrophication problems frequently occur. Phosphorus in water can be removed by various methods such as biosorption and chemical deposition, while nitrogen can only be oxidized and reduced to nitrogen gas through the nitrogen cycle to remove water. Therefore, it is particularly important to explore new nitrogen removal processes. [0003] Among the...

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Problems solved by technology

[0005] Each urban sewage treatment plant discharges a large amount of surplus sludge every day, and its treatment and disposal costs are high. At the same time, if it is not treated properly, it will become another form of pollution.

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