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Method for accurately monitoring chemical oxygen demand of sediment-laden river

A chemical oxygen demand and sediment content technology, which can be used in testing water, general water supply conservation, material inspection, etc., and can solve problems such as restrictions

Inactive Publication Date: 2012-12-19
兰州云式环境科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the current monitoring standards are subject to great restrictions and disadvantages in actual use.

Method used

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  • Method for accurately monitoring chemical oxygen demand of sediment-laden river
  • Method for accurately monitoring chemical oxygen demand of sediment-laden river
  • Method for accurately monitoring chemical oxygen demand of sediment-laden river

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Embodiment Construction

[0021] Rivers in my country are generally rich in sediment, and the sediment content of rivers is generally higher than that in foreign countries. In this embodiment, the Lanzhou section of the main stream of the Yellow River is selected as the monitoring object. The regulation and storage of 12 large-scale water conservancy and hydropower projects that have been completed in the main stream of the Yellow River, as well as the vigorous implementation of water and soil conservation projects such as check dams, have brought about significant changes in the cement and sand conditions of the Yellow River. Especially since 2008, the annual average sediment concentration of the main stream of the Yellow River has been below 6g / L, and the sediment is basically the relatively coarse-grained sediment restored by the water scouring the river along the course (the sediment particle size is mostly above 0.025mm , it is generally believed that fine-grained sediments have a greater impact o...

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Abstract

The invention discloses a method for accurately monitoring a chemical oxygen demand of a sediment-laden river. The method comprises the following steps of: detecting water body sediment characters, sediment content and sediment grain sizes of a river reach to be detected; simulating the effect of the different sediment content and different sample preservation conditions of an actual water body on CODCr (Chemical Oxygen Demand (Cr)) measurement by virtue of a treated river sediment sample and domestic sewage, thus obtaining a relationship diagram according to experimental data; and adjusting actual operation steps and amending data according to the relationshpip diagram. The method disclosed by the invention can be applied to the monitoring on the chemical oxygen demand of a water body of the sediment-laden river, eliminates the effect of sediment and operation during a monitoring experiment on the CODCr, and can obtain the data which can truthfully reflect the pollution condition of the river water body, thus having very important scientific and social practice significance on correctly assessing the actual pollution condition of the sediment-containing water body, more positively and effectively harnessing water environment pollution, employing optimized configuration of water resources, and pushing forward harmonious and sustainable development of social economy.

Description

technical field [0001] The invention relates to the technical field of environmental monitoring, in particular to a method for accurately monitoring the chemical oxygen demand of a sediment-rich river. Background technique [0002] Potassium dichromate is highly oxidizing and can oxidize most of the reducing substances in the water sample, so the chemical oxygen demand COD Cr It can objectively reflect the degree of organic pollution of the water body and is the main control index for evaluating the organic pollution of the water body. Therefore, accurate monitoring of COD Cr Essential to water conservation efforts. COD Cr The monitoring principle is to use potassium dichromate to oxidize the reducing substances in the water sample under the catalytic action of silver salt, and determine the degree of organic pollution of the water body according to the consumption of potassium dichromate. [0003] The pollution degree, pollution characteristics, migration, transformation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/18
CPCY02A20/20
Inventor 姜云超颜鲁河宋小三杜康赵丹丹武文飞晋王强赵翠翠
Owner 兰州云式环境科技有限公司
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