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A method and device for treating chromium composite polluted wastewater

A technology of compound pollution and treatment method, applied in the field of treatment and treatment of chromium compound pollution wastewater, can solve problems such as secondary pollution, and achieve the effects of simple device, cheap raw materials, and good removal effect

Inactive Publication Date: 2018-10-19
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the strong mobility of organic complex chromium, when it migrates in the environment, it will be oxidized to hexavalent chromium by bacteria under the action of manganese dioxide and other oxidized substances, thus causing secondary pollution

Method used

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  • A method and device for treating chromium composite polluted wastewater
  • A method and device for treating chromium composite polluted wastewater
  • A method and device for treating chromium composite polluted wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add the sludge from the secondary sedimentation tank and 300mL simulated wastewater into a 500mL stoppered Erlenmeyer flask to maintain an anoxic environment, then add 30g of biodegradable lunch box at 100rpm to acclimatize the sludge and degrade the biodegradable lunch box hanging film. Change the water three times a week and detect the nitrate and chromium content in the supernatant. After 2 months of acclimatization, a layer of biofilm hangs on the surface of the bio-reducible lunch box and the nitrate and chromium are stably removed. At this time, it is considered that the denitrification sludge is domesticated stably, and the bio-reduced lunch box can be successfully filmed.

[0023] In a 70mm inner diameter, 500mm high, 30g biodegradable lunch box is added to the upflow packed bed device, the filling height of the biodegradable lunch box is 250mm, and the biodegradable lunch box will contain 10mg / L hexavalent chromium and 200mg / L nitrate nitrogen The simulated wa...

Embodiment 2

[0026] Add the sludge from the secondary sedimentation tank and 300mL simulated wastewater into a 500mL stoppered Erlenmeyer flask to maintain an anoxic environment, and then add 30g of biodegradable lunch boxes at 100rpm to acclimatize the sludge and hang film on the biodegradable lunch boxes . Change the water three times a week and detect the nitrate and chromium content in the supernatant. After 2 months of acclimatization, a layer of biofilm hangs on the surface of the biodegradable lunch box and the nitrate and chromium have been removed stably. At this time, it is considered that the denitrification sludge is domesticated stably, and the biodegradable lunch box is successfully coated.

[0027] In a 70mm inner diameter, 500mm high, 30g biodegradable lunch box is added to the upflow packed bed device, the filling height of the biodegradable lunch box is 250mm, and the simulation containing 10mg / L hexavalent chromium and 400mg / L nitrate The waste water enters the reactor ...

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Abstract

The invention discloses a method and a plant for chromium compound pollution wastewater treatment. The method comprises the steps of removing large particle matters of sludge through a screen mesh, adding chromium compound pollution wastewater into the sludge, at the meantime adding biodegradable polymers to serve as a solid carbon source, performing effective biofilm culturing on a biocarrier, and putting an acclimated mixture into an up-flow packed bed device, adding an appropriate amount of solid carbon source to the hexavalent chromium compound pollution wastewater, and reacting under a continuous mode to complete the wastewater treatment process. The up-flow packed bed device comprises a water quality monitoring port, a solid sampling port, a tank body, a plastic net plate and a pump, wherein a water inlet is arranged at the lower end of the tank body, and the water quality monitoring port, the solid sampling port and the plastic net plate are arranged on the tank body. According to the method and the plant for chromium compound pollution wastewater treatment, hexavalent chromium and oxidation state pollutants are removed jointly and complex trivalent chromium is effectively fixed, continuous treatment can be achieved, and the plant can be used individually as an anaerobic reactor for treating nitrate, nitrite and the like during wastewater treatment or be used as a unit of a denitrification process during treatment of ammonia nitrogen.

Description

technical field [0001] The invention relates to a method and device for treating chromium composite polluted wastewater, and belongs to the technical field of treating heavy metal and inorganic compound pollution in water bodies. Background technique [0002] In recent years, with the rapid development of the chromium industry, the unreasonable discharge of chromium-containing wastewater has led to a large amount of chromium, especially hexavalent chromium, entering the water environment. Some surface water bodies in my country have been seriously polluted by chromium, and chromium pollution in groundwater is also very common, and chromium pollution incidents occur from time to time. The biological treatment of wastewater containing hexavalent chromium is considered to be one of the most potential wastewater pollution control methods, which has the advantages of mild reaction, low energy consumption, and small impact on the environment, especially in the range of middle and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/28C02F3/34
CPCC02F3/2806C02F3/341C02F2101/101C02F2101/16C02F2101/163C02F2101/166C02F2101/22
Inventor 金若菲王蓓蓓周集体柳广飞乔森
Owner DALIAN UNIV OF TECH