Intermittent biological sand filtration treatment system

Abstract

The invention discloses an intermittent biological sand filtration treatment system. The intermittent biological sand filtration treatment system comprises a water storage container which is communicated with two upper water inlet tanks respectively through a water inlet system, wherein water outlets of the upper water inlet tanks are communicated with water inlets in the upper ends of biological sand filters below the upper water inlet tanks through pipes respectively, and water outlets in the lower ends of the biological sand filters are communicated with a clean water tank through the pipes respectively; a porous water distribution plate is arranged between the water inlet and a filler layer in each biological sand filter; a self-control system is formed by connecting a control device, control valves arranged on the pipes and low and high water level control meters arranged in the upper water inlet tanks, automatic water supplementing and intermittent operation of the upper water inlet tanks can be controlled according to water inlet periods of the upper water inlet tanks, overflow is prevented, and water drainage of the biological sand filters is controlled. The cellar water treatment efficiency of the intermittent biological sand filtration treatment system is improved by 25%-40% compared with that of biological sand filtration, and the maintenance period of the system is prolonged to 1.0-1.25 years from 2-5 months.

Description

technical field [0001] The invention relates to the field of biological purification treatment of cellar water, in particular to an intermittent biological sand filtration treatment system. Background technique [0002] At present, in the arid regions of northwest my country, rainwater is an important living water resource, and rainwater is collected into water cellars for crop irrigation, livestock use, and drinking water sources for people. However, the cellar water is collected from the natural surface and stored for a long time. The water quality indicators such as organic matter, turbidity, chroma, ammonia nitrogen and microorganisms in the cellar water exceed the standard or exceed the standard seriously. People drink untreated or simply heated cellar water for a long time. People's health is troubled by the development of the northwest region and the improvement of people's living standards. [0003] Bio-sand filtration technology has broad application prospects in t...

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Problems solved by technology

[0004] Based on the problems existing in the above-mentioned prior art, the present invention provides an intermittent biological sand filter treatment system, which can solve the problems of long film-hanging period and continuous non-stop operation in the traditional biological sand filter technology applied to purify the water quality of rainwater cellars. Intermittent, low processing efficiency, short operating cycle, frequent maintenance, complex maintenance operations and need to shut down, etc.

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