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Treating agent for reducing sewage COD (Chemical Oxygen Demand) value

A treatment agent and sewage technology, which is applied in the field of treatment agents to reduce the COD value of sewage, can solve the problems of poor biodegradability of raw water and achieve the effect of reducing COD content

Inactive Publication Date: 2017-07-14
E TECH ENERGY TECH DEV CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biochemical treatment method is to use the metabolic life activities of corresponding microorganisms to convert organic impurities into harmless and simple substances, so as to reduce the oxygen demand, but the biodegradability of raw water is poor: the BOD5 of sewage is only 2mg / L. With increasing emphasis on environmental protection issues, the "Liaoning Provincial Sewage Comprehensive Discharge Standard" (DB21 / 1627-2008) was promulgated. In this standard, the allowable discharge concentration standard of sewage pollutants has been greatly improved (COD<50mg / L, ammonia nitrogen< 8 or 10mg / L, total nitrogen <15mg / L, total phosphorus <0.5mg / L)

Method used

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  • Treating agent for reducing sewage COD (Chemical Oxygen Demand) value
  • Treating agent for reducing sewage COD (Chemical Oxygen Demand) value

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take 250ml of petroleum wastewater into the water, add potassium ferrate, stir for 10 minutes, let it stand for 1-2 hours, and measure its COD; COD detection: potassium dichromate method (national standard method)

Embodiment 2

[0027] Take 250ml of petroleum wastewater effluent, put it in an electric heating constant temperature water bath with stirring, set at 50°C, preheat for 20 minutes, add potassium ferrate, stir magnetically for 10 minutes, let it stand for 1-2 hours, and measure its COD; COD detection: dichromic acid Potassium method (national standard method)

Embodiment 3

[0029] Take 250ml of petroleum wastewater and put it in an electric heating constant temperature water bath with stirring, set at 50°C. Preheat for 20min to adjust pH=3, +50mg of potassium ferrate, stir for 1h

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Abstract

The invention provides a treating agent for reducing a sewage COD (Chemical Oxygen Demand) value. The treating agent is prepared from potassium ferrate and aluminum chloride. The treating agent provided by the invention has the beneficial effects that the potassium ferrate is adopted as a strong oxidant, so that secondary pollution cannot be caused, and the potassium ferrate also has the effects of sterilizing, inhibiting bacteria, flocculating and the like; the potassium ferrate is combined with the flocculating agent aluminum chloride so as to be capable of reducing the COD content in petroleum wastewater within a short time.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, in particular to a treatment agent for reducing the COD value of sewage. Background technique [0002] In the study of the nature of industrial wastewater and the operation and management of wastewater treatment plants, chemical oxygen demand is an important and quickly measured organic pollution parameter, often expressed by the symbol COD (Chemical Oxygen Demand). It is also a chemical method to measure the amount of reducing substances that need to be oxidized in the water sample. Determination methods: dichromate method, potassium permanganate method, spectrophotometric method, rapid digestion method, rapid digestion spectrophotometric method. Chemical oxygen demand can also be compared with biochemical oxygen demand (BOD), the ratio of BOD / COD reflects the biodegradability of sewage. [0003] The crude oil produced in the oil field is of heavy oil type, and the produced water has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/00C02F1/28C02F1/50C02F1/52C02F1/66C02F1/72C02F103/36
CPCC02F1/00C02F1/28C02F1/50C02F1/52C02F1/5245C02F1/66C02F1/72C02F2103/365C02F2209/08C02F2303/02
Inventor 赵玉安
Owner E TECH ENERGY TECH DEV CORP
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