Sewage containing high concentration organics and ammonia nitrogen disposal method

An organic, high-concentration technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem of high power consumption, poor denitrification effect, construction and operation costs of treatment facilities increase and other problems, to achieve the effect of reducing reaction time and energy consumption, and reducing the concentration of ammonia nitrogen

Inactive Publication Date: 2004-02-04
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] (1) Since the anaerobic treatment unit contains a relatively high concentration of organic matter and ammoniacal nitrogen, the subsequent A / O treatment unit has poor denitrification effect, long reaction time and high power consumption
[0006] (2) Due to the large fluctuation of the effluent concentration of the anaerobic treatment unit, the treatment effect of the whole system is unstable
Or in order to improve the treatment stability of the whole system, it is necessary to increase the volume of the anaerobic treatment device, resulting in an increase in the construction and operation costs of the entire treatment facility

Method used

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  • Sewage containing high concentration organics and ammonia nitrogen disposal method

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Embodiment 1

[0023] The method of the present invention is used to treat the mixed sewage discharged from the rice washing and soybean cooking process of a certain rice raw material winery, and the sewage flow rate is 350m 3 / d, the process used is as follows figure 1 shown. First, the sewage is sent to the anaerobic treatment unit A[2] for treatment. The concentration of organic matter in the influent water is 5000mg / LCODcr, the concentration of total nitrogen is 500mg / L, the hydraulic retention time is 20 hours, and the water temperature in the anaerobic unit is 33- At 37°C, the removal rate of organic matter is 80%, and the biogas obtained per cubic meter of sewage is 2.0Nm 3 ; The effluent of anaerobic treatment unit A[2] is mixed with return water [7] and then sent to anaerobic treatment unit B[4] for treatment. The hydraulic retention time is 10 hours, and the removal rate of organic matter is 70%. m sewage get biogas 0.5Nm 3 The effluent of anaerobic treatment unit B [4] is sent ...

Embodiment 2

[0025] The method of the present invention is used to treat the sewage discharged from the alcohol distillation tower of a corn raw material alcohol factory, and the sewage flow rate is 700-800m 3 / d, the process used is as follows figure 1 shown. First, the sewage from which suspended solids have been removed is sent to the anaerobic treatment unit A[2] for treatment. The concentration of organic matter in the influent water is 25000-30000mg / LCODcr, the concentration of total nitrogen is 1500mg / L, and the hydraulic retention time is 30 hours. The water temperature in the tank is 53-57°C, the removal rate of organic matter is 90%, and 13.5Nm of biogas is obtained per cubic meter of sewage 3 ; The effluent of anaerobic treatment unit A[2] is mixed with return water [7] and then sent to anaerobic treatment unit B[4] for treatment. The hydraulic retention time is 15 hours, and the water temperature in the device is 33-37°C. The removal rate is 70%, and every cubic meter of sewa...

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Abstract

A process for treating the sewage containing high-concentration organic substance and ammoniacal nitrogen includes such steps as stage-one anaerobic treating to transform the organic substance in sewage to marsh gas, stage-two anaerobic treating to transform the organic substance, ammonia-state nitrogen and nitric acid-state nitrogen to marsh gas and nitrogen respectively, aerobic treating to transform the organic substance and ammonia-state nitrogen to CO2, H2O and nitric acid-state nitrogen, depositing, and returning part of supernatant back to stage-two anaerobic treating unit.

Description

Technical field: [0001] The invention relates to a sewage treatment method, in particular to a treatment method for sewage containing high-concentration organic matter and high-concentration ammonia nitrogen, and belongs to the technical field of sewage treatment. Background technique: [0002] Sewage containing both high concentrations of organic matter and high concentrations of ammonia nitrogen is produced in many industrial productions, such as alcohol, brewing, food and beverage processing, and so on. These sewage are very polluting sources of pollution. For an enterprise with an annual production of 15,000 tons of alcohol, the sewage discharged is equivalent to the pollution of domestic sewage in a building with a population of 300,000. [0003] The existing method for treating this type of sewage adopts "anaerobic + anoxic / aerobic combined treatment process" (A+A / O treatment process), which is characterized in that the wastewater is first treated by an anaerobic biolo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F9/14
Inventor 张振家
Owner SHANGHAI JIAO TONG UNIV
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