Integrated domestic sewage treatment device with novel structure

Abstract

The invention discloses an integrated domestic sewage treatment device with a novel structure. The sewage treatment device comprises an A-A' biological reaction tank, an O biological reaction tank, an FCD (Flocculation Control Device) reaction tank which are sequentially connected and arranged transversely, wherein the A-A' biological reaction tank and the O biological reaction tank constitute an anaerobic-anoxic-aerobic biological treatment system; since the A-A' biological reaction tank and O biological reaction tank both operate under the conditions that water and gas are supplied at a low pressure and the A-A' biological reaction tank and O biological reaction tank are sealed and equipped with particle fillers, the contents of oxygen dissolved in water and microbes are greatly increased. The FCD reaction tank is used for filtering water treated by the A-A'-O system and storing and disinfecting the cleaned water; a backwash water and gas inlet is arranged at the bottom of each of the FCD reactor tank, A-A' biological reaction tank and O biological reaction tank, and the top of the FCD reactor tank, the A-A' biological reaction tank and the O biological reaction tank are respectively connected with a backwash water outlet which is connected with the sludge inlet of the sedimentation-regulation tank; and a backwash mode of the treatment device is vertical backwash perpendicular to the water flowing direction.

Description

technical field [0001] The invention relates to a new type of integrated treatment equipment for domestic sewage. Background technique [0002] With the continuous expansion of the scale of rural urbanization in my country, the discharge of domestic sewage from urban residents' living areas is increasing. It is urgent to effectively treat domestic sewage to prevent its pollution hazards, and at the same time, the treated water will reach a certain level of water quality. Its resource utilization has been mentioned in the important agenda by the township governments of counties and towns across the country. [0003] my country has a vast territory, and the towns in many counties exist in a highly dispersed form. It is obviously unreasonable technically and economically to centralize the drainage pipe network of these townships that gather tens of kilometers together in the center of the county. It is one of the important needs in the process of rural urbanization in my country...

AI Technical Summary

Problems solved by technology

[0004] The research and development and production of small-scale domestic sewage treatment equipment in China began in the 1980s. The outstanding features of this type of equipment are: 1) The process flow is generally: precipitation-multi-stage biological contact oxidation-precipitation-discharge, and later in the good A hydrolysis and acidification section was added before the oxygen treatment section; 2) The structure is mostly modular integrated equipment, which is connected by two or three modular sub-devices with pipelines to form an "integrated" assembly mode; 3) In the biological oxidation section Equipped with combined or elastic microbial fillers or honeycomb inclined tube fillers to increase the number of microorganisms per unit volume; 4) The shape of each module is mostly a horizontal cylindrical tank with heads at both ends or a rectangular cross section 5) The main material of the module is glass fiber reinforced plastic, supplemented by carbon steel anti-corrosion; 6) The installation method is mainly buried, and a small part is semi-buried; 7) The operation mode generally has a separate In the underground operation room, a small part of the operation room is set in the module; 8) In terms of degree of automation, fully automated operation cannot be achieved, and fixed or on-duty personnel are required for full-time or regular operation or patrol supervision; 9) Equipment operating parameters Most of the detection is on-site manual sampling detection, lack of online automatic recording detection instruments, and very few detection data remote transmission systems; 10) The removal rate of various pollutant parameters in sewage: under normal operating conditions, the COD cr The removal rate ≥ 70%, BOD 5 The removal rate of SS is ≥80%, the removal rate of SS is ≥80%, and the removal rate of NH X - The removal rate of N is ≥70%, the removal rate of total phosphorus is ≥75%, and the removal rate of total nitrogen is ≥50%; the effluent can generally meet the requirements of the first-level standard in the "Comprehensive Wastewater Discharge Standard" (GB8978-1996), Namely PH6-9, BOD 5 ≤20mg / L,COD cr ≤60mg / L, chroma≤50 times, NH X -N≤15mg / L, SS should reach ≤20mg / L, but in general, SS≥30mg / L; but the effluent generally does not meet the requirements in Table 1 of "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002) Level 1 A standard: BOD 5 ≤10mg / L,COD cr ≤50mg / L, SS≤10mg / L, total nitrogen≤15mg / L, ammonia nitrogen≤5(8)mg / L, so they cannot be reused as water resources

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