Urban park and lake sewage treatment method

Abstract

The invention discloses an urban park and lake sewage treatment method. The urban park and lake sewage treatment method comprises the following steps: adding a phosphate fixing agent in a primary sewage purifying region, treating the problem that the element phosphor is main influence factor of water body eutrophication, enabling lake water which enters a secondary sewage purifying region to reacha basically clear state through the filter effect of a first screen membrane, a second screen membrane and a third screen membrane, adding aquatic plant and microbial water purifiers such as algae control magna and photosynthetic bacteria into the secondary sewage purifying region to further purify water, enabling the filtered water to enter a water purifying region, re-constructing ecological balance by planting improved submerged plant with a water quality purifying function, and adding aquatic animals such as fish, shrimps, spiral shells and shellfishes to achieve a self-purifying state, and continuously regulating each treatment region until the water purifying region covers the whole lake. The urban park and lake sewage treatment method is adopted to control the polluted lake, so that the lake water quality can be remarkably improved, lake eutrophication degree is reduced, and the ecology landscape that fish plays in the aquatic plant is further created.

Description

technical field [0001] The invention relates to the field of water quality purification and water ecological restoration methods, in particular to a method for treating urban park lake sewage. Background technique [0002] The park lakes in the city are the receivers of the urban surface runoff and even the surrounding domestic sewage, causing the accumulation of organic matter, nitrogen, phosphorus and other nutrients in the water; moreover, most of the water bodies are closed and slow-flowing water bodies with static or poor fluidity, and the general water environment capacity is small and the water body The self-purification capacity is low. During the rainy season, the pipeline sediments are washed and overflowed into the river, and the bottom of the river settles. Under anaerobic conditions, hydrogen sulfide, ammonia and other odorous gases are produced. The body is severely eutrophic, with large-scale outbreaks of blue-green algae, seriously affecting the quality of th...

AI Technical Summary

Problems solved by technology

[0002] The park lakes in the city are the receivers of the urban surface runoff and even the surrounding domestic sewage, causing the accumulation of organic matter, nitrogen, phosphorus and other nutrients in the water; moreover, most of the water bodies are closed and slow-flowing water bodies with static or poor fluidity, and the general water environment capacity is small and the water body The self-purification capacity is low. During the rainy season, the pipeline sediments are washed and overflowed into the river, and the bottom of the river settles. Under anaerobic conditions, hydrogen sulfide, ammonia and other odorous gases are produced. The body is severely eutrophic, and blue-green algae broke out in a large area, seriously affecting the quality of the urban water environment and the water ecological landscape.

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