Method for treating water quality of black-odor river channel

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...

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.

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