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Deep purifying method for slightly contaminated waste water

A technology of deep purification and wastewater, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. Achieve the effect of enhanced impact resistance, stable water quality, stable and reliable operation

Inactive Publication Date: 2016-02-03
蒋华
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  • Application Information

AI Technical Summary

Problems solved by technology

However, these studies have not yet reached the stage of application in industrial production; in addition, the cost of photocatalytic oxidation is expensive, the removal rate is low, and the energy consumption is high, which is not conducive to popularization

Method used

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Embodiment

[0036] This embodiment is the advanced treatment of oil refinery sewage.

[0037] The main pollutants of the refinery sewage are petroleum carbon-containing organic substances. After the A / O (anaerobic, aerobic series) process treatment, the main pollutants such as emulsified oil, light hydrocarbons, phenols, and aldehydes have been well recovered. removal. It can be seen from the water quality analysis data that the wastewater mainly contains a certain amount of suspended solids, soluble biodegradable substances, etc., and its wastewater has certain biodegradability, BOD 5 The / COD ratio is 0.25-0.35.

[0038] The processing capacity of this embodiment: 500m 3 / h, system working pressure: 0-0.4Mpa.

[0039] Concrete preparation process is as follows:

[0040] 1. Put the refinery sewage treated by the above-mentioned A / O process into the high-efficiency aerated bioreactor, and make the sewage immerse the filler in the reactor, and add polyaluminum iron oxide (35mg / l) and pol...

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PUM

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Abstract

A deep purifying method for slightly contaminated waste water is characterized by comprising the following treating steps: (1) biochemically treated chemical waste water enters an aeration bioreactor to immerse a filling material in the aeration bioreactor, flocculating agents are added into and fully mixed with outlet water of the aeration bioreactor to obtain a mixture I, and the mixture I enters a sand filter, wherein the flocculating agents are poly-aluminum ferrous chloride and poly-acrylamide with the adding quantities of 20 to 50 mg / l and 2 to 4 mg / l respectively; the chemical waste water contains 120 mg / l or less of COD, 20 mg / l or less of NH3-N, and 50 mg / l or less of suspended matters; (2) outlet water of the sand filter is mixed with ozone to obtain a mixture II, and the mixture II enters a biological activated carbon tower and stays in the biological activated carbon tower for 10 to 15 minutes, wherein the quantity of ozone is 5 to 10 mg / l; (3) water oxidized in the biological activated carbon tower sequentially enters two multi-media filters which are connected in series for filtration; (4) water filtered in the step (3) enters a compound filter for filtration, wherein the outlet water of the compound filter meets the standard of recycle water replenishing; (5) water filtered in the step (4) enters a micro-filter for filtration, so as to achieve the standard of desalted water replenishing.

Description

technical field [0001] The invention relates to sewage treatment technology, more specifically, a deep purification method for lightly polluted waste water. Background technique [0002] According to the national "Twelfth Five-Year" water-saving plan and requirements, the sewage reuse rate in the petrochemical industry is required to reach 50%. From the perspective of sustainable development, promote the recycling of sewage, vigorously develop sewage recycling, and make water supply and drainage in a similar manner. Integrated circulation, mutual complementation and rational allocation are important ways to solve the shortage of water resources. [0003] At present, various advanced wastewater treatment technologies that are relatively mature and deeply researched at home and abroad mainly have the following forms. [0004] ①Biochemical process [0005] The basic biochemical process of regulating tank-coagulation air flotation-sand filtration-hydrolysis acidification-biolo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 蒋华
Owner 蒋华
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