Rapid sewage COD detection method

A detection method and technology for sewage, applied in the direction of chemical analysis by titration method, can solve the problems of secondary pollution, anaerobic system impact, affecting the normal operation of production, etc., to avoid unnecessary accidents, prevent production workshop shutdown, The effect of convenient sewage operation and management

Inactive Publication Date: 2019-01-22
COFCO FOOD SCI & TECH WUHAN CO LTD
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Problems solved by technology

However, under normal circumstances, this method takes about 2 hours from the detection and titration to the data monitoring results, and it is impossible to detect changes in the incoming water indicators in time. Once high-concentration sewage enters the system, it will have an impact on the anaerobic system and affect the normal drainage of production.
At the same time, this method is restricted by the number of test samples, and the analysis time is long, which cannot meet the requirements of batch testing, and the analysis cost and energy consumption are high, and the consumption of mercury salts, silver salts, and chromium salts is large, and it is easy to cause secondary pollution. Moreover, in the existing technology, the change of the incoming water index is quickly and timely detected, and then early regulation is carried out, which solves the problem that the sewage system is often impacted by high-concentration sewage and affects the normal operation of production, which has greater significance in actual production

Method used

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Embodiment Construction

[0020] Sampling: Sewage laboratory sampling comes from mixed wastewater samples from the production workshop (including ground flushing water, activated carbon regeneration wastewater from charcoal furnaces, detached wastewater, plate and frame cleaning water), and this wastewater detached wastewater accounts for 90%. Sampling of incoming water from the sewage station is taken from the entrance of the 1200 cubic buffer tank. According to the communication with the production workshop, it is known whether the workshop discharges sewage. In order to ensure the accuracy of sampling, the sampling bottle was rinsed 3 times, and the sampling port was drained for about 3 seconds to ensure that the water quality was all current wastewater.

[0021] In order to ensure that the sampling frequency is high, resulting in more wastewater discharge, a sampling tank is left on site to ensure that the wastewater will not be lost too much and pollute the surrounding environment. After the sampl...

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Abstract

The invention provides a simple and rapid sewage COD detection method. The sewage color is observed and / or is compared with a colourimetric card by adding a reagent to determine an approximate range of sewage COD so as to meet the demands of early discovery, early warning and early regulation and control for high-concentration sewage in the modern actual production.

Description

technical field [0001] The invention relates to the field of sewage detection, in particular to a method for quickly measuring the chemical oxygen demand of water samples. Background technique [0002] COD (Chemical Oxygen Demand) is a chemical method to measure the amount of reducing substances that need to be oxidized in water. It is an important indicator in the research on the nature of industrial wastewater and the operation and management of wastewater treatment. It is also a major assessment indicator for the current national energy conservation and emission reduction. COD reflects the degree of pollution in water by reducing substances. [0003] At present, the most commonly used method for COD determination is potassium dichromate (K 2 C 2 o 7 ) titration method, potassium dichromate has a high oxidation rate and good reproducibility, and is suitable for determining the total amount of organic matter in water samples. However, under normal circumstances, this me...

Claims

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Application Information

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IPC IPC(8): G01N31/16
CPCG01N31/16
Inventor 赵永武皮冬伟张耀威雷金章耿鑫琪刘玉彪温东伟李贵涛冉小力童彪
Owner COFCO FOOD SCI & TECH WUHAN CO LTD
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