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Method for quick processing wastewater by using microwave energy

A technology for wastewater treatment and microwave treatment, which is applied in the direction of light water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., to achieve the effects of small land occupation, on-site resource utilization of sewage, and small sewage treatment equipment

Inactive Publication Date: 2009-06-17
GUANGDONG SHANGJIU BIODEGRADABLE PLASTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is to overcome the shortcomings of single use of flocculation sedimentation method or microwave treatment method for sewage treatment, and propose a method for quickly treating wastewater using microwave energy that combines the two organically. Strong, high treatment rate, significant economic and social benefits

Method used

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  • Method for quick processing wastewater by using microwave energy
  • Method for quick processing wastewater by using microwave energy

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0088] Example 1 Add 5ppm of iron-aluminum polymer flocculant, microwave power 20KW / h, act for 0.3 seconds, feed water 100 cubic meters / h

[0089] The sewage is taken from a sewage treatment plant, the pH of the raw water is 7.3, and the NH 3-N is 31.6ppm, COD is 352ppm, BOD is 54ppm, chroma is 92, the total number of bacteria is 24000, the pH of the effluent after microwave treatment at 20KW / h for 0.3 seconds is 7.17, NH 3 -N is 3.42ppm, the removal rate is 97.2%; COD is 9ppm, the removal rate is 100%; BOD<2ppm, the removal rate is 99.5%; the color is 7, the removal rate is 83.8%; the total number of bacteria is 420 , The removal rate is 98.3%. The effluent meets the Class I A discharge standard and the ground Class III reuse standard.

example 2

[0090] Example 2 Domestic sewage treatment experiment

[0091] The sewage is taken from domestic sewage in a commercial area. The raw sewage contains volatile phenol 0.012mg / L, cyanide 0.004mg / L, COD 109mg / L, suspended matter 94.8mg / L, ammonia nitrogen 14.5mg / L, BOD 5 49.3mg / L, the total number of bacteria is 198667 / L, adding 3ppm of iron-aluminum polymer flocculant, after microwave treatment with a power of 20KW / h for 0.3 seconds, the effluent contains 0.004mg / L of volatile phenol, 0.002mg / L of cyanide, and 15.8 COD mg / L, suspended matter 8.1mg / L, ammonia nitrogen 8mg / L, BOD 5 4.3mg / L, the total number of bacteria is 1693 / L, and the removal rates are 66.7%, 50%, 85.5%, 91.5%, 44.8%, 91.3% and 99.1%. The experiment has reached the Class III ground reuse standard and the supplementary water quality standard of industrial fresh water.

example 3

[0092] Example 3 Electroplating wastewater treatment experiment

[0093] Electroplating wastewater from an electroplating factory was used for microwave treatment experiments. The pH of raw sewage was 1.64, COD was 182mg / L, hexavalent chromium was 0.162mg / L, cyanide was 11.1mg / L, ammonia nitrogen was 10.6mg / L, and phosphate was 9.46mg / L. L, copper 16.5mg / L, lead 0.504mg / L, zinc 8.15mg / L, add iron-aluminum polymer flocculant 3ppm, after microwave treatment with power 20KW / h for 0.3 seconds, the pH of the effluent is 7.56, and the COD is 40.0mg / L , hexavalent chromium 0.033mg / L, cyanide 0.018mg / L, ammonia nitrogen 0.24mg / L, phosphate not detected, copper 0.311mg / L, lead not detected, zinc not detected. The effluent is stable up to the standard, and all the effluent indicators have been tested to meet the "Water Pollutant Discharge Limits" of Guangdong Province (DB44 / 26-2001)

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Abstract

The invention discloses a method for rapid sewage treatment by using microwaves. The invention adopts a technical proposal of organically combining a flocculent settling method and a microwave treatment method, namely, pretreating sewage by using a physicochemical treatment technology to reduce the burden of microwave treatment, improve the efficiency of microwave treatment and solve the problem of high cost due to large physicochemical agent consumption during single physicochemical treatment at the same time. The method for rapid sewage treatment by using microwaves has the advantages of small sewage treatment equipment, large treatment capacity, small land occupation and effluent and mud meeting standards for direct reuse, and consequently is applicable to sewage treatment of various scales and capable of avoiding huge pipe network construction for concentrated sewage treatment. The quality of water treated by the technology reaches A standard of GB18918-2002 Pollutants Emission Standards of Urban Wastewater Treatment Firm and GJ25.1-89 Quality Standards for Water for Living General Use of Ministry of Housing and Urban-Rural Development of the People's Republic of China, so on-site recycling of sewage is realized.

Description

Technical field: [0001] The invention relates to the technical field of waste water treatment, in particular to a method for rapidly treating waste water by using microwave energy. The treatment method is a method for treating waste water by using a polymer flocculant combined with microwave energy. Background technique [0002] 1. Flocculation and sedimentation sewage treatment technology [0003] The flocculation and sedimentation method is an economical and simple water quality treatment method widely used at home and abroad to improve the efficiency of water quality treatment. Polymer flocculant plays an irreplaceable role in the water treatment process due to its good coagulation effect, decolorization ability and easy operation, and has attracted widespread attention at home and abroad. With the strengthening of people's awareness of environmental protection, more high-efficiency, low-toxicity, economical and applicable polymer flocculants will appear, and it will als...

Claims

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Application Information

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IPC IPC(8): C02F1/30C02F1/52
Inventor 祝光富黄少斌杨刚毅徐荣险张峥嵘
Owner GUANGDONG SHANGJIU BIODEGRADABLE PLASTICS
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