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Method for treating kitchen anaerobic waste water through short-cut nitrification and denitrification

A short-range nitrification and wastewater technology, applied in anaerobic digestion treatment, chemical instruments and methods, aerobic process treatment, etc., can solve the problems of high energy consumption, low total nitrogen removal efficiency, and many external carbon sources, etc., to achieve Avoid the effect of sludge bulking

Active Publication Date: 2014-10-15
江苏马盛生物科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to provide a method of using short-cut nitrification and denitrification in addition to kitchen anaerobic wastewater treatment, so as to solve the problem that the existing biological denitrification process requires more additional carbon sources, complex system operation, and more energy consumption. , and the total nitrogen removal efficiency is not high

Method used

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  • Method for treating kitchen anaerobic waste water through short-cut nitrification and denitrification

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Experimental program
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Effect test

Embodiment 1

[0034] Embodiment 1 equipment and its operation

[0035] The water distribution tank 8 is preferably steel structure, design parameters: L×W×H=50cm×40cm×50cm, a stirring device 10 is installed on the top, the power is 100W, and the rotation speed is 40rpm. The feed pump is a peristaltic pump 9 (voltage: 220V, flow rate: 0.002-270ml / min), and a sampling port is provided 5cm from the bottom of the distribution tank. At the same time, according to the C / N ratio, an appropriate amount of raw kitchen water from the hydrolysis acidification tank of the company where the test was conducted was added as a carbon source for denitrification.

[0036] The high-efficiency biological denitrification reactor controls the temperature at 35±1°C and the pH at 7.0-8.5. Design parameters: glass structure, the size is D×H=10cm×220cm, bottom feeding is adopted, 4 distribution pipes are evenly distributed, and kitchen waste water, nitrification liquid and nitrosation liquid are mixed and fed at a ...

Embodiment 2

[0043] Example 2 Kitchen sewage treatment

[0044] The waste water of Jiangsu Clean Environment Technology Co., Ltd. after anaerobic fermentation was used as the raw material, and the water quality indicators of the waste water are shown in Table 1.

[0045] Table 1 Kitchen wastewater quality

[0046]

[0047] The waste water is mixed with the returning nitrosation liquid and nitrification liquid into the high-efficiency denitrification reactor, and then flows through the anoxic tank 1, the short-range nitrification reactor, the aerobic tank, the anoxic tank 2, and the sedimentation tank, and then overflows. During the operation of the process, the wastewater indicators monitored daily include: pH, COD, TN, NH 4 + -N, NO 3 - -N, NO 2 - -N, MLSS.

[0048] After a period of operation, the change trend of nitrite nitrogen accumulation rate in the short-cut nitrification reactor is as follows: figure 1 As shown, the influent water quality of the reactor fluctuates great...

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Abstract

The invention discloses a method for treating kitchen anaerobic waste water through short-cut nitrification and denitrification and belongs to the technical field of environmental engineering sewage biological treatment. The method aims at high-ammonia-nitrogen and low-C / N characteristics of the waste water, and the deep denitrification effect is realized through an efficient biological denitrification reactor, a short-cut nitrification reactor and an endogenous denitrification tank under proper condition control. In view of the problem of unbalance of C / N of the kitchen waste water, biodegradable COD is fully used for denitrification at a front anoxic stage, and meanwhile, NH4<+>-N is oxidized to an NO2<->-N stage in the short-cut nitrification reactor, so that carbon sources required at a denitrification stage are saved. Only an ammoxidation reaction instead of a nitrite oxidation reaction exists in the short-cut nitrification process, so that the required aeration quantity is fewer, and the energy consumption is lower. NH4<+>-N, TN and COD can be better removed in the whole process, and the treated effluent completely reaches local connecting pipe emission standards.

Description

technical field [0001] The invention relates to a method for treating kitchen anaerobic wastewater by using short-range nitrification and denitrification, and belongs to the technical field of environmental engineering sewage biological treatment. Background technique [0002] With the rapid growth of the economy and the acceleration of the urban process, the generation of urban kitchen waste continues to grow, and the resulting pollution to the environment is also becoming more and more serious. The reduction, harmless and resourceful disposal of kitchen waste has become an important issue. current research hotspot. [0003] Kitchen waste is the main component of municipal solid waste, accounting for about 37% to 62% of municipal solid waste. According to statistics from the Institute of Solid Waste Pollution Control and Recycling of Tsinghua University, cities in my country generate more than 60 million tons of kitchen waste every year. Food waste is mainly composed of s...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/28C02F3/02
CPCY02W10/10
Inventor 阮文权赵明星张周
Owner 江苏马盛生物科技股份有限公司
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