Method for ecology restoration and water quality maintenance of city landscape water body by adopting reclaimed water as supply

Abstract

The invention relates to a method for ecology restoration and water quality maintenance of a city landscape water body by adopting reclaimed water as supply. According to the method, a composite type plant ecology system comprising two parts of an ecology bank revetment and a composite type ecology floating island is constructed, and an artificial regulation system is adopted to regulate a landscape water body, wherein the ecology bank revetment comprises a vegetation soil slope type bank revetment, a vegetation tile type bank revetment and a wetland type ecology bank revetment; bank revetments on both sides of the landscape water body are provided with multiple groups of composite type ecology floating islands, wherein each group of the composite type ecology floating islands is formed by connecting a plurality of floating island monomers, and the lower parts of each group of the composite type ecology floating islands are suspended with ecology grasses; the artificial regulation system comprises three parts of water supply regulation, water body disturbance/oxygen increase regulation and aquatic animal regulation. The method of the present invention is applicable for landscape water bodies adopting reclaimed water as a supply water source, wherein the reclaimed water meets requirements of "The reuse of urban recycling water-Water quality standard for scenic environment use". With the method of the present invention, natural ecology system construction and artificial regulation are combined, self-purification capacity of water bodies can be effectively enhanced, and landscape function of water bodies can be maintained.

Description

Technical field: [0001] The invention belongs to the technical field of environmental engineering, and in particular relates to a method for ecological restoration and water quality maintenance of urban landscape water bodies supplemented by recycled water. Background technique: [0002] Due to changes in the natural environment, growing population, rapid economic development, and man-made pollution, more and more cities and regions in my country are facing water shortages. The former landscape river has become a dry river, and the landscape function is almost lost. Reuse of reclaimed water for urban landscape water is one of the effective ways to develop and utilize unconventional water sources and improve urban water environment. Engineering practices have been carried out in Beijing, Shandong, Hebei, Xi'an, Anhui and other places. Policies and standards related to the utilization of recycled water have also been promulgated or revised. The "Urban Sewage Recycling Techn...

AI Technical Summary

Problems solved by technology

The existing technology is generally aimed at the prevention and control of eutrophication of natural water bodies or the treatment of polluted water bodies, without considering the factors of water supply, such as the difference between the water quality of reclaimed water and the water quality of landscape water bodies—mainly the indicators of ammonia nitrogen and total phosphorus, And the specific functional orientation of landscape water bodies and other factors

[0004] Aiming at the eutrophication problem that is easy to occur when reclaimed water is reused in landscape water bodies, the existing technology is to improve the water quality indicators of reclaimed water, especially to reduce the content of ammonia nitrogen and TP, and even reach the standard of Class IV water body in the "Environmental Quality Standards for Surface Water". For some sewage treatment plants, the goal is only to produce reclaimed water that meets the requirements of "Urban Sewage Reuse, Landscape and Environmental Water Quality". Utilization in a non-continuous manner will also increase the difficulty in the operation of reclaimed water facilities

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