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Catalytic oxidation method for low-concentration non-biodegradable industrial organic wastewater treatment

A technology of organic wastewater treatment and catalytic oxidation, which is applied in the direction of special compound water treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problem that the treatment process is difficult to meet the corresponding requirements, and achieve wide applicability and universal application Wide range of properties and mild reaction conditions

Active Publication Date: 2017-12-15
云南省贵金属新材料控股集团有限公司
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Biological method is the most widely used technology for the treatment of low-concentration organic wastewater. The traditional treatment process is difficult to meet the corresponding requirements. Due to the design reasons of many water plants, the original treatment unit can no longer meet the existing requirements, so the sewage treatment plant The improvement of wastewater standards has to be put on the agenda

Method used

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  • Catalytic oxidation method for low-concentration non-biodegradable industrial organic wastewater treatment
  • Catalytic oxidation method for low-concentration non-biodegradable industrial organic wastewater treatment
  • Catalytic oxidation method for low-concentration non-biodegradable industrial organic wastewater treatment

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0031] Example 1: Taking the concentrated solution of a tobacco leaf company in Yunnan as the experimental object after the biochemical effluent passed through the reverse osmosis membrane, the water quality analysis of the water sample showed that the COD was 550-600 mg / L, and the chromaticity was 1200-1300. After being treated by the process of the method, the wastewater treatment residence time is 20 minutes, the effluent water quality after the catalytic oxidation is COD≤40mg / L, and the chroma is ≤20. The process has no attenuation after treating 7 tons of waste water in the laboratory, and the reliability of the service life has been verified. The experimental results are shown in Figure 4 and Table 1.

[0032] Table 1

[0033] Treated water volume / L

example 2

[0034] Example 2: The biochemical effluent of printing and dyeing wastewater from a sewage treatment plant in Xiaoshan, Hangzhou was taken as the experimental object. After water quality analysis, it was found that the COD was 100-150 mg / L and the chroma was 100-300 degrees. After being treated by the process of the method, the wastewater treatment residence time is 20 minutes, the COD of the effluent after catalytic oxidation is ≤30 mg / L, and the chromaticity is ≤10. The process has no attenuation after treating 10 tons of waste water in the laboratory, and the reliability of the service life has been verified. The experimental results are shown in Figure 5 and Table 2.

[0035] Table 2

[0036] Treated water volume / L

example 3

[0037] Example 3: Taking the wastewater from a certain drug manufacturing den cracked in Yunnan as the experimental object, the water quality analysis of the water samples revealed that the COD was 1000-1500mg / L and the chroma was 30-50. Through the process of the method, the wastewater treatment residence time is 30 minutes, the COD of the effluent water is ≤50 mg / L, and the chroma is ≤10.

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Abstract

The invention discloses a catalytic oxidation method for low-concentration non-biodegradable industrial organic wastewater treatment. A core process of the method comprises a front-end enhanced flocculation technology, a catalytic oxidation technology under conditions of normal temperature and normal pressure and a tail-end purification technology. Under the conditions of normal temperature and normal pressure, after enhanced flocculation is performed with calcium hypochlorite and a flocculating agent (polyacrylamide) firstly, ozone with certain concentration and a small amount of H2O2 are supplemented under the conditions of normal temperature and normal pressure, catalytic oxidation is executed by a honeycomb support catalyst supported with noble metal elements such as Pt, Pd, Ru and the like as well as transition metal elements such as Cu, Mn, Zn, Fe, Co and the like, and low-concentration non-biodegradable industrial organic wastewater with COD (chemical oxygen demand) lower than 1000 is efficiently treated. According to the method, the removal rate of the COD is higher than or equal to 95%, the efficiency is increased by 40% than that of independent ozonation for organic pollutants, and the ozone consumption is reduced by 60%.

Description

technical field [0001] The invention relates to a catalytic oxidation method for the treatment of low-concentration (COD≤1000mg / L) biorefractory industrial organic wastewater under normal temperature and pressure conditions, and is especially suitable for treatment by other traditional methods or traditional processes that do not reach the current national level. The water quality of Class A discharge standard. Background technique [0002] With the country's urbanization process and the accelerated development of industry, the problem of environmental pollution is becoming more and more serious. As a large amount of domestic and industrial sewage flows into rivers, lakes or groundwater, it causes serious pollution to water bodies and affects fishery water and domestic water. The "Water Pollution Prevention and Control Action Plan" was promulgated in February and April 2015, and the country raised the sewage discharge standard, and the discharge standard was upgraded from t...

Claims

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Application Information

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IPC IPC(8): C02F9/04
CPCC02F1/001C02F1/5236C02F1/56C02F1/722C02F1/725C02F1/78C02F9/00C02F2001/007C02F2305/023
Inventor 刘锋卢军涂学炎李世民周皓肖宇白屏朱绍武陈家林贺小昆冯峰
Owner 云南省贵金属新材料控股集团有限公司
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