Normal-temperature low-C/N-ratio sewage continuous shortcut nitrification starting method

A short-range nitrification and normal temperature technology, which is applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as high temperature and limited application, and achieve enhanced removal efficiency and prolonged sludge removal. age, increase system nitrification capacity and biomass

Active Publication Date: 2014-07-30
BEIJING UNIV OF TECH
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Problems solved by technology

However, the process requires a higher temperature, which limits its application

Method used

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[0024] Continuous flow A 2 The configuration of the / O reactor: made of 2mm steel plate material, the length, width and height are 110cm, 30cm and 40cm respectively, with a total effective volume of 120L, separated by perforated steel plates, divided into anaerobic zone, anoxic zone along the direction of water flow Zone, aerobic section 1, aerobic section 2 and aerobic section 3, the ratio of each reaction zone is adjusted to V 厌氧 :V 缺氧 :V 好氧1 :V 好 氧2 :V 好氧3 =1:2:1:1:1. At the bottom of the aerobic zone, a microporous aeration plate is connected to the air compressor, and the gas flow meter controls the aeration amount. The anaerobic zone and the anoxic zone are stirred by stirring paddles to prevent sludge from settling.

[0025] Inoculate the return sludge from the secondary sedimentation tank of a municipal sewage treatment plant in Beijing into 2 In the / O reactor, the sludge nitrification performance is good, and the sludge concentration in the reactor is 2.5-3g / L...

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Abstract

The invention relates to a normal-temperature low-C/N-ratio sewage continuous shortcut nitrification starting method, and belongs to the sewage treatment and regeneration field. The method comprises the following steps: dividing the aerobic zone of an A<2>O reactor into three segments comprising an aerobic segment 1, an aerobic segment 2 and an aerobic segment 3 along a water flow direction, and refluxing a nitrification liquid to an anoxic zone from the aerobic segment 3; and inoculating nitrated sludge into the reactor until the concentration of sludge in the reactor is 2.5-3g/L, rapidly elutriating nitrite oxidation bacteria (NOB) with continuous flow short-sludge-age water at a water temperature of 23-25DEG C, screening ammonia-oxidizing bacteria (AOB), adding a cylindrical polypropylene suspension filler into an aerobic zone, recovering the long sludge age, reducing the dissolved oxygen concentration of the aerobic zone, and maintaining the above conditions until the mass concentration of ammonia nitrogen in water discharged from the A<2>O reactor decreases to below 2mg/L and the nitrosification rate stably maintains above 80% in order to complete the continuous shortcut nitrification starting. The starting method realizes the advanced treatment of the N element through shortcut nitrification denitrification, and is simple and feasible.

Description

technical field [0001] The invention belongs to the field of sewage treatment and regeneration. Specifically, the invention relates to the quick start of short-cut nitrification of a continuous flow reactor specially used for treating normal temperature and low C / N ratio sewage. Background technique [0002] With the rapid growth of population, the rapid development of economy and the intensification of human activities in our country, the pollution of water bodies is becoming more and more serious, especially the eutrophication of water bodies caused by nitrogen and phosphorus elements is the most prominent, which has great impact on the ecological environment and human health. had a great impact. At present, for the removal of nitrogen, urban sewage treatment plants mostly adopt the denitrification process based on the traditional nitrification and denitrification principle, such as A / O, oxidation ditch, A 2 / O process, etc. [0003] such as A 2 The / O method is a clas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F3/34
Inventor 李冬杨杰范丹罗亚红路健姜沙沙张金库梁雨雯王朗卫家驹田海成吕育锋曾辉平张杰
Owner BEIJING UNIV OF TECH
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