Distributed rural domestic sewage treatment system suitable for plateau section

Abstract

The invention discloses a distributed rural domestic sewage treatment system suitable for the plateau section. The system comprises an oil-separating tank, an anaerobic digester, a sequencing batch reactor (SBR) reaction pool and a subsurface-flow constructed wetland, wherein the oil-separating tank and the anaerobic digester are positioned underground, and the outer walls of the oil-separating tank and the anaerobic digester are respectively provided with a thermal insulation material for realizing thermal insulation; the wall of the anaerobic digester is provided with a solar heating device, the anaerobic digester is internally connected with a pressure gauge, the top of the anaerobic digester is provided with a biogas collecting pipe, and the generated biogas is collected so as to be used by farmer families; on the one hand, the bottom of the SBR reaction pool is provided with an aerator pipe and a sludge discharge pipe, and a top cover is arranged above the SBR reaction pool, so that odor diffusion is prevented, and on the other hand, a solar panel can be arranged on the cover, and a solar heater is used for heating the anaerobic digester, so that a digestive hydrolysis process is accelerated, and the yield of the biogas is increased; sewage flows into a constructed wetland treatment unit after passing through a water discharge pipe of the SBR reaction pool; the upper layer of a constructed wetland is a soil vegetation layer used for planting local cold-resistant plants, and the lower layer of the constructed wetland is a filter layer filled with pebbles, crushed stones and cinder filler.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a treatment system suitable for distributed domestic sewage in alpine regions. Background technique [0002] With the rapid development of my country's economy and the continuous increase of population, the problem of water pollution is becoming more and more serious. Large and medium-sized cities have slowed water pollution to a certain extent by continuously improving sewage collection pipe networks, improving sewage treatment facilities, and strict sewage discharge standards. However, due to the long-term lack of effective treatment technology and management methods for rural domestic sewage, a large amount of untreated rural domestic sewage is discharged randomly, which has led to the increasingly prominent problem of rural water environment pollution. [0003] Distributed rural domestic sewage has the characteristics of small water volume, high organic ...

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Problems solved by technology

The purification effect of these methods on sewage is greatly affected by environmental factors such as climate and air pressure, so they cannot be well applied to plateau areas with environmental characteristics such as high altitude, high cold (or large temperature difference between day and night), low oxygen, low air pressure, and strong sunshine.

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