Short-cut nitrification coupled reduction-state humus enhanced anaerobic denitrification device

Abstract

The invention relates to a short-cut nitrification coupled reduction-state humus enhanced anaerobic denitrification device. The first part is an HSR reactor for generating reduced humus, wherein the water flow is in annular motion, and the respiration of the humus is promoted by adding Fe 3+. The second part is a short-cut nitrification reactor, wherein effluent enters an intermediate water tank,reflux nitrogen is introduced, effluent of the intermediate water tank is combined with effluent of the first part, and the effluent enters the third part after pH is adjusted. The third part is an anaerobic ammonia oxidation and denitrification reactor, wherein the lower layer is subjected to Anammox reaction, nitrate dissimilatory reducing bacteria reduce nitrate into ammonia nitrogen and generate CO2 to promote anaerobic ammonia oxidation, and solid-liquid separation is realized by an inclined baffle plate; meanwhile, a DN reaction is carried out on the upper layer, so that the organic matter can be used as a denitrification carbon source herein, and the reduction-state humus can provide an electron donor to greatly promote denitrification reaction. The device has the characteristics ofhigh sewage denitrification efficiency, stable operation effect, high reaction rate, no need of an external carbon source and the like.

Description

technical field [0001] The invention relates to a sewage treatment device, in particular to a short-range nitrification coupled reduced humus enhanced anaerobic denitrification device. Background technique [0002] The reduced humus has a strong electron donating ability, which can strengthen the anaerobic conversion of wastewater nitrate. The study found that AQDS (humus model substance) reduction (AH 2 QDS, hydroquinone) in microbial reduction of nitrate and N 2 O acts as an electron donor, AHDS is used as a reducing humic substance model, and nitrate is used as an electron acceptor. Humic activated sludge A constructed by Wu Lei 2 O system, its technical core is to add a humic activated sludge culture tank in the sludge return section to produce reduced humus, and then enter the activated sludge system to increase the amount of electron donors, thereby enhancing the efficiency of extracellular electron transfer and improving the efficiency of microorganisms. Denitrifi...

AI Technical Summary

Problems solved by technology

However, most of the current literature mainly studies the original state or oxidized humus and its influence on the anammox process, and there are few studies on the influence of the reduced humus on the anammox process.

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