Rainwater collecting and recycling method

Abstract

The invention discloses a rainwater collecting and recycling method. The method comprises the steps as follows: a roof rainwater collecting system and a ground runoff rainwater collecting system are used for collecting rainwater into a buried reservoir; a rainwater monitoring sensor is mounted on a roof and a water level sensor is mounted in the buried reservoir; the buried reservoir is communicated with a sedimentation tank, and sedimentation is realized through fiber reinforced plastic grids and high-speed sand filtration in the sedimentation tank; polymeric aluminum chloride and polyacrylamide are added to the sedimentation tank for coagulation; primarily filtered water is delivered into a restroom of a building through a domestic water delivery pipe to flush a toilet; secondarily filtered water flows into a fish pond through a pipeline for fish culture; water discharged from the fish pond is used for irrigating planted plants through a water distribution pipe; the pipeline is connected with a plant planting area, biological filtration is performed on water obtained after irrigation, and the filtered water flows back to the fish pond through a pipeline. The use cost is low by use of recycled rainwater, recycling of rainwater contributes to improvement of the ecological environment, and virtuous cycle of water ecology is realized.

Description

technical field [0001] The invention relates to a method, in particular to a method for collecting and recycling rainwater. Background technique [0002] According to statistics, nearly 400 of the more than 600 cities in the country are short of water or severely short of water. Especially in some large and super-large cities, the contradiction between supply and demand of water resources is more acute, which directly affects people's life, production and social development. The shortage of water resources has become one of the important factors affecting and restricting the sustainable development of my country's economy and society. With the rapid development of urbanization in my country, greater pressure will be placed on water resources and the water environment. Rainwater utilization is an effective measure to solve the contradiction between water shortage and economic and social development, alleviate the urban water crisis, and improve the urban water environment. ...

AI Technical Summary

Problems solved by technology

[0004] Sponge city is a new generation of urban rainwater management concept, which means that the city has good flexibility in adapting to environmental changes and responding to natural disasters caused by rainwater. In fact, this concept corresponds to the rainwater collection and recycling system in the existing technology , the rainwater collection and recycling method and system in the prior art are mostly just drained directly through the downpipe of the building, and are not utilized, resulting in a great waste of resources, without excessive treatment, and cannot used in many fields