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Multi-stage composite processing technology of high-concentration organic sewage

A technology of organic wastewater and treatment process, which is applied in the directions of water/sewage multi-stage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. Incomplete adaptation and other problems, to achieve good social and economic benefits, improve the efficiency of biochemical treatment, and improve the effect of biochemical treatment

Active Publication Date: 2011-09-14
深圳市先科环保有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] There are many methods for organic wastewater treatment in the prior art, and the Chinese Patent Office has also published a lot of patent documents, but most of them directly adopt biochemical treatment methods, and all the treatment processes are completed sequentially at one time, but for high-concentration wastewater , this treatment method is not completely suitable, and it is difficult to achieve a better treatment effect; at present, some people use an anaerobic-aerobic cycle integrated treatment method, although compared with a single treatment, the effect has been improved to a certain extent, but due to The characteristics of raw water are different, and the above treatment methods are difficult to fully adapt to

Method used

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  • Multi-stage composite processing technology of high-concentration organic sewage
  • Multi-stage composite processing technology of high-concentration organic sewage
  • Multi-stage composite processing technology of high-concentration organic sewage

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Embodiment 1

[0034] Such as figure 1 , Figure 1A As shown, the present embodiment provides a method for treating high-concentration chemical organic wastewater by a multi-stage combined process, which mainly includes pretreatment biochemical treatment, and the process includes the following treatment steps:

[0035] 1) Firstly, introduce high-concentration wastewater into the regulating tank 1, which can be equipped with a liquid level controller and a time controller to control the opening of the lifting pump, which can adjust the water quality and volume of the wastewater, and lift the wastewater into the subsequent process deal with;

[0036] 2) The wastewater enters the anoxic pool through the regulating pool 1. Under the anoxic condition, the anoxic denitrifying bacteria use the organic matter as the electron donor, the combined oxygen respiration in the nitrate nitrogen, and the nitrate or nitrite as the electron acceptor To carry out metabolic activities, oxidize and decompose or...

Embodiment 2

[0055] Such as figure 2 As shown, the utility model can also be provided with a pretreatment step before the biochemical treatment, and can perform preliminary treatment on wastewater with more impurities and suspended matter content, and the pretreatment step includes catalytic oxidation, flocculation / precipitation, Flocculation / air flotation, anaerobic / sedimentation, stripping treatment single, partial or all process combination. Such as Figure 2A As shown, this embodiment specifically introduces high-concentration wastewater into the regulating tank 1, and then sets the flocculation tank 2 and the air flotation tank 3. Dissolved air is blown into the water outlet. Pretreatment can remove suspended solids in raw water and partially remove dissolved organic pollutants, so as to reduce the pollutant treatment load of the main biochemical process.

[0056] When the removal rate of pretreatment pollutants is less than 50%, the pH value should be adjusted, and appropriate fl...

Embodiment 3

[0065] Such as image 3 As shown, in this embodiment, treatment steps are provided before and after the biochemical treatment of the organic wastewater, so that the water quality can reach the reuse water standard. Wherein the pretreatment step can be treated according to the second embodiment, and the posttreatment step includes at least one membrane bioreaction, or simultaneous catalytic oxidation, flocculation / sedimentation, sand filtration, carbon filtration, ultrafiltration, reverse osmosis, and disinfection In the above-mentioned catalytic oxidation, flocculation / sedimentation, sand filtration, carbon filtration, ultrafiltration, reverse osmosis, and disinfection treatment steps, any one of the treatment steps can be selected to be carried out alone with the membrane biological reaction, and it can also be considered according to the biochemical physiology of high-concentration organic wastewater. effluent COD Cr 、BOD 5 The predicted data and their ratios of the above-...

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Abstract

The present invention relates to a multi-stage combination process used for the treatment of organic wastewater of high concentration, comprising a pretreatment process, a biochemical treatment process and a post-treatment process. The biochemical treatment process comprises the following steps: 1) the raw water passes a regulating tank and enters an anoxic tank for anoxic biodegradation; 2) the effluent after the anoxic biodegradation enters an aerobic tank for second biodegradation; 3) the effluent after the aerobic treatment enters an anaerobic tank for biodegradation or flows back to the anoxic tank for recirculation; 4) the effluent after the anaerobic treatment enters a second stage aerobic tank for further degradation or flows back to the anaerobic tank for recirculation; 5) the effluent after the second stage aerobic treatment flows back to the anoxic tank, wherein the effluent after the second stage aerobic treatment enters an aerobic tank and the backflow ratio of the anaerobic tank is 50% to 200%, and the final effluent enters a sedimentation tank, and the effluent meeting the standard after the sedimentation, together with the sludge, is discharged. The processes of the invention can also be provided with a plurality of stages of pretreatment steps and a plurality of post-treatment processes. The processes of the invention can ensure that any high concentration organic wastewater after treatment meets the discharge standard and the wastewater can be recycled.

Description

【Technical field】 [0001] The invention relates to a wastewater treatment process in the field of environmental protection, in particular to a process for treating biochemically degradable high-concentration wastewater whose COD (chemical oxygen demand): BOD (biochemical oxygen demand) is greater than 4 times of the biochemically treated wastewater. Level combination processing technology. 【Background technique】 [0002] The treatment of high-concentration organic wastewater with a COD concentration of 30,000mg / L-100,000mg / L is a technical problem in the environmental protection circles at home and abroad. The early method of diluting with clean water and then treating it is a simple method that can be treated on the surface and then discharged up to the standard. The total amount of pollution has not been reduced, and the floor area is large, the operating cost is high, and the cost is expensive. Although the method of burning after concentration is feasible, the cost is hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F3/30C02F1/52
Inventor 张善武钟江涛蔡昊余先福李伟强朱定有沈亮
Owner 深圳市先科环保有限公司
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