Treatment method of organic wastewater and application

A treatment method, a technology for organic wastewater, applied in water treatment parameter control, special compound water treatment, biological water/sewage treatment, etc., can solve the problems of poor impact resistance, weak nitrate nitrogen treatment capacity, and low COD treatment capacity, etc. problems, to achieve the effects of strong impact resistance, shortened start-up cycle, and small footprint of the processing device

Active Publication Date: 2021-12-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has the problem that the COD treatment capacity is not high, the nitrate nitrogen treatment capacity is not strong, it is granular sludge and the impact resistance is poor.

Method used

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  • Treatment method of organic wastewater and application

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0061] The cultivation of sludge (denitrifying bacteria) is cultivated according to the disclosed method of CN101402990B, specifically:

[0062] 1. Preparation of anaerobic denitrifying bacteria liquid screening medium and solid screening medium;

[0063] 2.0g KNO 3 , 2.0g NaNO 3 , 0.03g MgSO 4 ·7H 2 O, 0.5g K 2 HPO 4 , 10g sodium potassium tartrate, 1.0gKH 2 PO 4 , 0.5g FeCl 2 ·6H 2 O, 0.2g CaCl 2 2H 2 O, 0.5g L-cysteine ​​and the distilled water of surplus form, and the pH value of liquid screening medium is 7.5;

[0064] 2. Take the activated sludge from the anaerobic nitrogen removal process and perform multiple dilution under anaerobic conditions;

[0065] 3. Separation of solid medium: melt the medium for solid screening prepared in step 1 in a boiling water bath, then cool to 50°C, quickly inject the sewage or activated sludge diluted in step 2 into the solid medium with a syringe, and use Hungate Oxygen and "rolling tube" methods are mixed in cold water, a...

Embodiment 1

[0071] A treatment method for organic wastewater, using figure 1 said device,

[0072] Step 1, start-up phase:

[0073] (1) sludge (denitrifying bacteria, obtained in preparation 1) is added to the expanded bed reactor ( figure 1 The packing layer in 1), relative to every L of packing layer filled with biocarriers ( figure 1 (shown in 6) volume, the amount of sludge added on a dry basis is 5g;

[0074] (2) will contain urea, NaH 2 PO 4 , sodium nitrate (initial weight concentration of nitrate-containing material in terms of nitrogen element is 500mg / L) and diluted organic wastewater with COD weight concentration of 3750mg / L (COD weight concentration in organic wastewater is 10000mg / L) , to obtain influent water (initially meeting the COD required for denitrification reaction 1 The weight concentration ratio of the nitrate-containing substance in terms of nitrogen is 3.5:1; the COD required for the anaerobic methanogenesis reaction is initially satisfied 2 It is 2000mg / L; ...

Embodiment 2

[0082] According to the method of Example 1, the difference is that the amount of sludge added on a dry basis is 2 g relative to the volume of the packing layer filled with biological carriers per L.

[0083] Activation time is 30 days.

[0084] After running for 15 days, the measured COD content in the organic wastewater was 200mg / L, and the COD removal rate was 98%.

[0085] After continuing to operate for 15 days (30 days in total), the measured COD content in the organic wastewater was 200 mg / L, and the COD removal rate was 98%.

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Abstract

The invention discloses a treatment method of organic wastewater and application. The treatment method of organic wastewater comprises the following steps of: 1, (1) contacting influent water containing nitrogen nutritive salt, phosphorus nutritive salt, a nitrate-containing substance and a carbon source with denitrifying bacteria and a biological carrier in an expanded bed reactor to carry out denitrification reaction and anaerobic methanogenesis reaction, domesticating the denitrifying bacteria and generating anaerobic methanogens; (2) adjusting the weight concentration of one or more of the nitrogen nutritive salt, the phosphorus nutritive salt, the nitrate-containing substance and the carbon source in the influent water to convert the denitrifying bacteria on the surface of the biological carrier into anaerobic methanogens; and 2, introducing organic wastewater into the expanded bed reactor for treatment. The method disclosed by the invention has the advantages of short starting time, strong COD treatment capacity and high COD removal rate.

Description

technical field [0001] The invention relates to a treatment method and application of organic wastewater. Background technique [0002] In recent years, the treatment of high-concentration organic wastewater in the field of water treatment has become one of the social hot spots. With the increasingly serious problem of eutrophication in China's water bodies and the improvement of future sewage discharge standards, COD removal has always been one of the key issues in the field of water treatment. How to remove COD in water economically, efficiently and safely, and continue to improve the quality of effluent water has become an urgent work content in the field of sewage treatment. [0003] At present, most of the traditional biological treatment methods are used to treat high-concentration organic wastewater. In recent years, the anaerobic treatment process of sewage has developed rapidly, and various new processes and methods have emerged, including anaerobic contact method ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F3/34C02F101/30
CPCC02F3/2806C02F3/2866C02F3/34C02F2101/30C02F2203/004C02F2203/006C02F2209/08C02F2209/02C02F2305/06C02F2301/046Y02E50/30
Inventor 张宾程学文王珺莫馗李海龙高凤霞侯秀华
Owner CHINA PETROLEUM & CHEM CORP
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