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Method for treating water quality of black-odor river channel

A river channel and water quality technology, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of long time required, discounted coagulation effect, and poor deodorization effect and other problems, to achieve the effect of inhibiting the sediment from floating up, improving the transparency, and reducing the preparation time

Inactive Publication Date: 2012-07-18
GUANGDONG ZHONGDA ENVIRONMENTAL PROTECTION TECH INVESTMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dredging project can transfer the pollutants in the river sediment in a short period of time. It is a better method for controlling the pollution of the river sediment, but it cannot be used for emergency purification of the river water quality; The water quality in the river can be purified by means of dilution and transfer, but the conditions required by this method are quite special, and it is necessary to use a special river water level difference or a water pump lifting method to achieve water exchange. This method only allows the pollutants to other The transfer of water bodies cannot remove pollutants; the main purpose of river aeration and ecological engineering construction is to restore and strengthen the self-purification ability of the river itself. It will take a long time to achieve the effect of water quality purification to gradually restore and purify the water quality. As an auxiliary measure for rapid improvement of coagulation, it is difficult to achieve the hydraulic conditions required for coagulation for ordinary slow-flowing rivers, so that the coagulation effect is greatly reduced; although coagulation can quickly eliminate the "blackness" of the water body, the deodorization effect is insufficient Good; river sediment coverage is also a pollution control method for river sediment, which has certain advantages, but it still cannot achieve emergency purification of river water quality
[0004] In summary, there is currently no method that can quickly and effectively control the black and odorous water quality of slow-flowing rivers.

Method used

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Examples

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Embodiment 1

[0026] A certain river in Guangzhou is located in the central area of ​​Guangzhou. The width of the river is about 30 meters, the length of the river is 2,400 meters, and the treatment length is about 2,000 meters. Residents' domestic sewage is discharged along the coast. The flow velocity of the river is 0.04-0.26m / s, the water depth is between 0.6-2 meters, the water flow is slow, and there is almost no self-purification ability. Before the emergency treatment, the water body was black and smelly, and black sediment emerged from the bottom of the river from time to time.

[0027] During implementation, the dissolved oxygen amount X of the river water is determined to be 0.8 mg / L by the laboratory, and then the amount Y of the substrate cleaning agent to be added is determined to be 84 mg / L according to the relational formula of Y=-20X+100. First install the dosing device in the river, and then use the jet pump to spray the substrate purification agent along the 2,000-meter t...

Embodiment 2

[0032] Zhangcunyong, Baiyun District, Guangzhou, has a river width of 6-10 meters, a river channel length of about 1,500 meters, and a treatment length of about 500 meters. A large amount of sewage is discharged into the upstream of the river. The flow velocity of the river is between 0.02-0.1m / s, and the water depth is between 0.6-1m. The water flow is slow. Before the emergency treatment, the water body is black and smelly, and black sediment emerges from the bottom of the river from time to time. River gushing into Shijing River caused great pollution to Shijing.

[0033] During implementation, the dissolved oxygen amount X of the river water is determined to be 0 by the laboratory, and then the amount Y of the substrate cleaning agent to be added is determined to be 100 mg / L according to the relational formula of Y=-20X+100. First install the dosing device in the river, and then use the jet pump to spray the substrate purification agent along the 500-meter treatment sectio...

Embodiment 3

[0038] A certain river in a certain city has a width of 15-30 meters, a river channel length of about 1,500 meters, a treatment length of about 1,100 meters, a water depth of 1.2-2.5 meters, and slow water flow. Black bottom mud. It is required that the water body in the water quality assurance section should not be black or smelly, and the transparency should be >0.7m. The flow velocity of the river during the guarantee period is between 0.02 and 0.23m / s.

[0039]During implementation, the dissolved oxygen amount X of the river water is determined to be 0 by the laboratory, and then the amount Y of the substrate cleaning agent to be added is determined to be 100 mg / L according to the relational formula of Y=-20X+100. First install the dosing device in the river, and then use the jet pump to spray the substrate purification agent along the 1100-meter treatment section of the river. The substrate cleaning agent is a mixture of calcium peroxide and oxalic acid. The weight rat...

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Abstract

A method for treating water quality of a black-odor river channel comprises the following steps, (1) determining river-water oxygen-dissolving amount X mg / L; (2) placing a bottom material scavenging agent mg / L in the river channel; (3) spraying a photosynthetic bacterium environment scavenging agent in the river channel; and (4) placing polyaluminium chloride and microbial flocculant in the river channel. The bottom material scavenging agent is a mixture of calcium peroxide and oxalic acid. The method for treating the water quality of the black-odor river channel is simple, can effectively restrain upward floating of bottom mud of the river channel, eliminates odor, effectively removes COD, NH3-N and total phosphorus in the river and greatly improves transparency of the river water. Besides, flood control and navigation of the river channel are not influenced, emergency preparation time is little, and chemicals take effect in 1-2 days after applied.

Description

technical field [0001] The invention relates to the technical field of water quality treatment, in particular to a method for controlling the water quality of black and odorous river courses. Background technique [0002] There are a large number of slow-flowing rivers in China, especially in the Pearl River Delta region. The self-purification ability of such rivers is poor. Due to the discharge of a large amount of pollutants, the water body is black and smelly, and the bottom mud floats up. These rivers merge into the main stream, causing the water quality of the main stream to deteriorate, destroying the overall environment and affecting the normal life of residents. Therefore, rapid and effective water purification measures must be taken to ensure timely and effective improvement of water quality and create a comfortable and harmonious living environment. [0003] At present, the treatment methods for black and odorous water quality in river courses mainly include closu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 欧阳清华苏蕾李杰圣黄秀玲陈云思
Owner GUANGDONG ZHONGDA ENVIRONMENTAL PROTECTION TECH INVESTMENT
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