Unpowered rapid oxygenation rural domestic sewage treatment device and treatment method

Abstract

The invention relates to an unpowered rapid oxygenation rural domestic sewage treatment device and method. The unpowered rapid oxygenation rural domestic sewage treatment device comprises an anaerobic unit and an oxygenation aerobic unit. The oxygenation aerobic unit comprises a gravity aeration system and an aerobic reaction system. The gravity aeration system comprises a reversible water bucket, a piston assembly, an air suction pipe, an air guide pipe and an aeration head. Sewage discharged by the anaerobic unit is discharged into the reversible water bucket from the upper part of the reversible water bucket. The reversible water bucket, the air suction pipe and the air guide pipe are respectively connected with the piston assembly. The aeration head is connected with the air guide pipe, and the aeration head is positioned in the aerobic reaction system. Before the amount of water in the reversible water bucket reaches a preset water amount, a piston is extruded to discharge air. When the amount of water in the reversible water bucket reaches the preset water amount, the reversible water bucket is reversed to discharge the stored sewage, and the piston returns. The device is high in aeration speed, the contact time of gas and sewage is greatly prolonged, and the aeration efficiency is obviously improved. Meanwhile, the device is simple in structure, small in size and convenient to popularize and apply.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a device and method for treating rural domestic sewage without power and rapidly increasing oxygen. Background technique [0002] Rural domestic sewage has the characteristics of small water volume, scattered discharge, and complex water quality. At the same time, the per capita discharge of domestic sewage in rural areas is far lower than that in urban areas, and the houses in rural areas are basically self-built houses, which are relatively random. Therefore, equipment suitable for urban sewage treatment is difficult to apply to decentralized rural domestic sewage treatment. At present, a large number of miniaturized treatment equipments have appeared for the treatment of rural domestic sewage, and most of the treatment processes adopt biological treatment, mainly anaerobic, aerobic and plant adsorption. In the aerobic process, power mechanical equipment is usually u...

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Problems solved by technology

[0003] In response to this situation, relevant technical personnel have developed non-powered domestic sewage treatment devices. At present, non-powered domestic sewage treatment devices generally adopt natural reoxygenation methods (water drop, waterwheel type, differential pressure type), and natural reoxygenation methods exist. Problems such as low reoxygenation efficiency and unsatisfactory follow-up treatment effect

[0004] For example, the Chinese patent with the application number 201920781635.8 involves a new type of unpowered rural domestic sewage treatment device. The device uses a biological runner for self-aeration, but it only uses the runner to sprinkle and re-oxygenate, and the amount of sprinkled water is limited and the contact time is limited. Short, resulting in low reoxygenation efficiency, and in order to achieve the treatment effect, it is necessary to set up multi-stage biological runners, which also leads to an increase in the occupied area

Similarly, the aeration involved in the Chinese patent with application number 201810247867.5 also uses water trucks, which still have the problems of less water spraying and short contact time; in addition, the device uses aerobic first and then anaerobic treatment of domestic sewage At the same time, a certain amount of water is required to drive the water wheel. Due to the discharge characteristics of rural domestic sewage in the morning and evening, it is difficult to realize it only by the liquid level difference, and the sewage directly enters after reoxygenation, requiring a large-volume anaerobic chamber, resulting in The overall device volume increases

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