Method for removing chemical oxygen demand of landfill leachate

A chemical oxygen demand and landfill leachate technology, applied in chemical instruments and methods, contaminated groundwater/leachate treatment, oxidized water/sewage treatment, etc., can solve the difficulties of large-scale industrial production, deterioration of working environment, cumbersome operating procedures and other issues, to achieve good chemical oxygen demand removal effect, simple preparation process, and low cost

Inactive Publication Date: 2020-06-26
SHENZHEN CHANGLONG TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The surface of the process looks relatively simple, but the actual operation procedures are cumbersome and require a recrystallization purification process; the preparation process involves toxic Cl 2 Therefore, although the process is relatively mature, its production cost is expensive, and large-scale industrial production is difficult.

Method used

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  • Method for removing chemical oxygen demand of landfill leachate
  • Method for removing chemical oxygen demand of landfill leachate
  • Method for removing chemical oxygen demand of landfill leachate

Examples

Experimental program
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Effect test

Embodiment 1

[0026] The above method is used to reduce the chemical oxygen demand value of landfill leachate, and the specific operation steps are as follows:

[0027] 1. Collect the long-term storage and stable landfill landfill leachate from the regulating pool in Shenzhen. The appearance is dark brown and has an odor.

[0028] 2. Use the national standard method to detect the indicators of leachate samples as shown in the table below.

[0029] Water quality index of leachate in a landfill site in Shenzhen

[0030]

[0031]

[0032] 3. Follow the steps below to treat landfill leachate.

[0033] 1) Dosing industrial pure sodium chlorate and sodium chlorate solid simultaneously in the landfill leachate, the dosage of sodium hypochlorite is 2% of the quality of landfill leachate, and the dosage of sodium chlorate is 1.5% of the quality of landfill leachate.

[0034] 2) Adding 0.05% of landfill leachate mass, the BET specific surface area is about 2000m 2 / L coconut shell activated ...

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Abstract

The invention discloses a method for removing chemical oxygen demand of landfill leachate, wherein the method is applied to sewage treatment, and can effectively remove the chemical oxygen demand in water through oxidation effect and flocculation effect of polyferric sulfate. The method comprises the following implementation steps: 1) determining the chemical oxygen demand value of sewage, and adding sodium hypochlorite and sodium chlorate into the sewage according to the proportional relation between the chemical oxygen demand and sodium hypochlorite; 2) adding an alkaline substance solid ora saturated solution, and adjusting the pH value to 10 or above; and 3) adding ferric chloride according to the chemical oxygen demand of the leachate, quickly stirring for several minutes, completelymixing, and precipitating for half an hour; and 4) adding a small amount of polyaluminium chloride, slowly stirring for 10 minutes, and precipitating for 1 hour. The invention discloses a method forremoving the chemical oxygen demand of landfill leachate, wherein the method has the characteristics of low cost, high speed and high application value, and can effectively remove the chemical oxygendemand index of sewage such as landfill leachate.

Description

technical field [0001] The invention relates to a method for removing chemical oxygen demand, in particular to a method for quickly reducing the chemical oxygen demand of landfill leachate. Background technique [0002] With the acceleration of urbanization and the improvement of people's living standards, the generation of urban domestic waste is also increasing. In 2000, the volume of domestic waste removal in my country was 118 million tons, and in 2008 it reached 154 million tons. By the end of 2017, the national living The waste disposal volume reached 215 million tons. [0003] Landfill leachate is the sewage formed by leaching from the water produced by the decomposition of organic matter in the waste, free water in the waste, precipitation, and infiltrated groundwater during the landfill and stacking process. In 2017, the national landfill leachate production was about 97.16 million tons, with an average daily production of about 266,200 tons. How to efficiently trea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/06
CPCC02F9/00C02F2103/06C02F1/66C02F1/38C02F1/76C02F1/5236C02F2301/08
Inventor 李晨杨佳妮周小峰梁燕婷黄冰冰董林辉蔡振山
Owner SHENZHEN CHANGLONG TECH CO LTD
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