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Method for combined enhanced coagulation treatment of black and odorous water body by potassium permanganate and activated carbon

A technology of black and odorous water, potassium ferrate, applied in chemical instruments and methods, special treatment targets, water/sewage treatment, etc. The effect of low cost, improved settling performance and strong operability

Inactive Publication Date: 2019-01-22
JIANGSU POLYTECHNIC COLLEGE OF AGRI & FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The intermediate product of potassium ferrate oxidation will increase the chroma of the water body and cause secondary pollution; the oxidation of chlorine is easy to produce "three-induced" organic chlorides; the application of chlorine dioxide and ozone to enhanced coagulation is costly and difficult to operate

Method used

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  • Method for combined enhanced coagulation treatment of black and odorous water body by potassium permanganate and activated carbon
  • Method for combined enhanced coagulation treatment of black and odorous water body by potassium permanganate and activated carbon
  • Method for combined enhanced coagulation treatment of black and odorous water body by potassium permanganate and activated carbon

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The method for using potassium ferrate and activated carbon to jointly strengthen coagulation treatment of black and odorous water comprises the following steps: adding potassium ferrate to the black and odorous water for pre-oxidation reaction for 15 minutes, adding polyaluminum chloride and activated carbon, adjusting the pH value to 10, and Stir at 250r / min for 3min, then at 100r / min for 4min, then at 30r / min for 8min, and let it settle for 25min. Among them, the addition amount of polyaluminium chloride is 50 mg in 1 L of black and odorous water, the addition of potassium ferrate is 1.2 mg in 1 L of black and odorous water, and the addition of activated carbon is 1 L Add 20mg to the black and odorous water.

Embodiment 2

[0034] The method of using potassium ferrate and activated carbon to jointly strengthen the coagulation treatment of black and odorous water comprises the following steps: adding potassium ferrate to the black and odorous water for pre-oxidation reaction for 5 minutes, adding polyaluminum chloride and activated carbon, adjusting the pH value to 5, and Stir at 350r / min for 1min, then at 200r / min for 2min, then at 100r / min for 3min, and let it settle for 15min. Among them, the addition amount of polyaluminum chloride is 10 mg in 1 L of black and odorous water, the addition of potassium ferrate is 0.8 mg in 1 L of black and odorous water, and the addition of activated carbon is 1 L Add 10mg to the black and odorous water.

Embodiment 3

[0036] This embodiment selects K 2 FeO 4 and GAC dosage, K 2 FeO 4 The four factors of preoxidation time and pH value were used as independent variables. According to the central combination principle, a total of 29 sets of experimental combination schemes with 4 factors and 3 levels were designed using the BBD model in the Design-expert response surface software (Table 3), in which the number of experiments in the factorial part was 24 times, and the repeated experiments at the central point were 5 times. To determine the best process combination for water quality (Table 4). The design factors and levels of BBD model optimization experiments are shown in Table 3.

[0037] Table 3 Coding and level of experimental independent variable factors

[0038]

[0039]

[0040]According to Table 3, the response surface experiment was carried out according to the BBD model in the Design-expert response surface software. The experimental design and results are shown in Table 4....

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Abstract

The invention discloses a method for combined enhanced coagulation treatment of a black and odorous water body by potassium permanganate and activated carbon, wherein the method includes the steps ofadding potassium permanganate and polyaluminum chloride to the black and odorous water body, stirring, then adding activated carbon, adjusting the pH value to 5-10, carrying out a stirring reaction, and then carrying out static precipitation. The method not only can effectively adsorb dissolved organic matters in the black and odorous water body, improves sedimentation performance of water flocs,effectively removes various pollutants, has obvious chemical oxygen demand (COD), ammonia nitrogen (NH3-N) and turbidity removal effects, and is high in operability and low in cost.

Description

technical field [0001] The invention belongs to the field of black and odorous water treatment, and in particular relates to a method for treating black and odorous water by combined enhanced coagulation with potassium ferrate and activated carbon. Background technique [0002] With the rapid development of economy and society, the water environment is facing various pressures such as water pollution and water resource shortage. Black and odorous water bodies are currently a prominent water environment problem that affects production and life. The country is actively promoting the treatment of black and odorous water bodies. The "Water Pollution Prevention and Control Action Plan" promulgated by the State Council proposes that "by 2020, the black and odorous water bodies in the urban built-up areas at the prefecture level and above shall be controlled within 10%, and by 2030, the black and odorous water bodies in the urban built-up areas shall be eliminated in general". Tar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
CPCC02F1/5245C02F1/722C02F2209/14C02F2303/02
Inventor 樊开青黄滔邰燕朱晓彦
Owner JIANGSU POLYTECHNIC COLLEGE OF AGRI & FORESTRY