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Method for removing COD of membrane concentrated liquid

A concentrated water and hydrogen peroxide technology, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problems of increased site occupation and high treatment costs, and achieve weight reduction, difficulty and cost reduction, and water treatment costs cheap effect

Active Publication Date: 2015-04-29
NANJING YUANQUAN TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with general water-insoluble industrial solid waste, this solid waste has higher processing costs and requires a special warehouse for storage, so it also increases the site occupation

Method used

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  • Method for removing COD of membrane concentrated liquid
  • Method for removing COD of membrane concentrated liquid
  • Method for removing COD of membrane concentrated liquid

Examples

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Effect test

Embodiment 1

[0046] In the present embodiment, the effective volume of the oxidation pond is 5m 3 , The effective volume of the ultraviolet treatment device is 50L, and a 100W ultraviolet lamp and corresponding driver are used. COD is measured by the method for measuring the chemical oxygen demand in GB11914-89 of the film concentrated water after the reuse of reclaimed water in the treatment of electroplating wastewater Cr The value is 589mg / L, and the concentration of heavy metals meets the requirements of "National Standard Sewage Comprehensive Discharge Standard of the People's Republic of China (GB8978-1996)".

[0047] (1) Cyclic oxidation treatment under ultraviolet irradiation: Inject 5000L membrane concentrated water into the oxidation pool, and in the oxidation pool: put 3kg of FeSO4·7H 2 O and 4.18 kg of H 2 C 2 o 4 2H 2 O, wait for 10min; adjust the pH value of the solution to 3-4, pH=3.1 in this embodiment; open H 2 o 2 Dosing pump, add 22.5L of 30%H 2 o 2 ; Turn on th...

Embodiment 2

[0051] In this embodiment, the effective volume of the oxidation tank is 10m 3 , The effective volume of the ultraviolet irradiation device is 100L, and two 100W ultraviolet lamps and corresponding drivers are used. COD is measured by the method for measuring the chemical oxygen demand in GB11914-89 of the film concentrated water after the reuse of reclaimed water in the treatment of electroplating wastewater Cr The value is 782mg / L, the content of heavy metal zinc ions is 21mg / L, and the content of nickel ions is 13mg / L.

[0052] (1) Cyclic oxidation treatment under ultraviolet irradiation: Inject 10,000L membrane concentrated water into the oxidation pool, and in the oxidation pool: put 6.79kg of FeSO4·7H 2 O and 9.24 kg of H 2 C 2 o 4 2H 2 O, wait for 10min; adjust the pH value of the solution to 3-4, pH=3.0 in this embodiment; open H 2 o 2Dosing pump, add 59.9L of 30%H 2 o 2 ; Turn on the circulating pump and the ultraviolet lamp, and make the water in the oxidati...

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Abstract

The invention discloses a method for removing COD of membrane concentrated liquid. The method comprises three technical units such as cyclic oxidation treatment under ultraviolet ray irradiation, flocculation deposition and standard discharge. Through Fenton oxidation under ultraviolet ray irradiation, standard membrane concentrated liquid discharge is realized. The method realizes COD removal discharge satisfying the standard and heavy metal ion discharge satisfying the standard, replaces a high-energy consumption evaporation method for membrane concentrated liquid treatment, realizes low equipment investment, small floor space, less equipment reconstruction and low operation cost, and solves the problem that the existing evaporation method needs a special warehouse for storage of evaporated soluble solid waste.

Description

technical field [0001] The invention belongs to the technical field of industrial wastewater treatment, and in particular relates to a method for removing COD and heavy metal ions in membrane concentrated water. Background technique [0002] Membrane is an inorganic or organic polymer material with special selective separation function. It can separate the fluid into two parts that are not connected, so that one or several substances can pass through and separate other substances. . Membrane separation is a method of separating solutes or solvents under the action of a certain driving force and using the specific permeability of a certain membrane. As the treatment progresses, the salt content in the water on one side of the membrane will become higher and higher. Membrane concentrated water comes from high-salt wastewater that cannot be further purified by membrane separation during the reuse of reclaimed water in electroplating wastewater treatment. Membrane concentrate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08C02F103/16
CPCC02F1/32C02F1/52C02F1/56C02F1/722C02F9/00C02F2101/20C02F2103/16C02F2301/046C02F2303/00C02F2305/026
Inventor 沈德华范正芳康佑军秦晴高娟李瑞鹏张伟宁军吴冬飞纪国庆裴宁黄亚俊
Owner NANJING YUANQUAN TECH CO LTD
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