Integrated rural sewage treatment device combined with AAO and SBR processes

Abstract

The invention relates to the technical field of sewage treatment, in particular to an integrated rural sewage treatment device combined with AAO and SBR processes. According to the invention, an AAOsystem is effectively combined with an SBR system, so that the nitrogen and phosphorus removal efficiency of the device is greatly improved; in the case of continuous operation of the front AAO system, two facultative tanks operate alternately, so that continuous water outlet is achieved, and the facultative tanks can obtain conservation, and the treatment capacity of the facultative tanks is ensured; a turbulent flow partition is respectively arranged in the facultative tanks, the sewage and the sludge are mixed more uniformly in the facultative tanks, the uniformity of material mixing in each reaction tank is obviously improved, the MLSS value of each reaction tank is increased, and the reaction rate of each reaction tank, especially the nitrification reaction, is improved; the device achieves the efficient and intensive treatment of the rural sewage with a the small land occupied, the integration degree is high and the device is suitable for large-scale popularization.

Description

technical field [0001] The application relates to the technical field of sewage treatment, in particular to an integrated rural sewage treatment device combining AAO and SBR processes. Background technique [0002] At present, my country's rural sewage discharge is large, but the treatment efficiency is very low. 96% of the villages do not have drainage channels and sewage treatment systems. Most of the sewage is discharged directly without treatment, causing serious pollution to the environment. , Difficult to collect, multiple sources, complex components, high concentration of suspended solids, etc. Restricted by geographical conditions and economic factors, the centralized sewage treatment mode of urbanization is not suitable for rural sewage treatment, so a technology suitable for rural sewage decentralized treatment is proposed It is the key to solve the problem of rural water pollution. Currently commonly used sewage treatment processes are AAO ("anaerobic-anoxic-oxic" ...

AI Technical Summary

Problems solved by technology

[0002] At present, my country's rural sewage discharge is large, but the treatment efficiency is very low. 96% of the villages do not have drainage channels and sewage treatment systems. Most of the sewage is discharged directly without treatment, causing serious pollution to the environment. , Difficult to collect, multiple sources, complex components, high concentration of suspended solids, etc. Restricted by geographical conditions and economic factors, the centralized sewage treatment mode of urbanization is not suitable for rural sewage treatment, so a technology suitable for rural sewage decentralized treatment is proposed and technology are the key to solving the problem of rural water pollution

Currently commonly used sewage treatment processes are AAO ("anaerobic-anoxic-oxic" sewage treatment process, Anaerobic-Anoxic-Oxic), oxidation ditch and SBR (sequencing batch activated sludge process, Sequencing Batch Reactor Activated Sludge Process ) technology, the oxidation ditch process is more suitable for large-scale centralized sewage plants due to its technical characteristics, and the AAO and SBR processes have the prospect of small-scale application. , anoxic tank, aerobic tank and secondary sedimentation tank, the total hydraulic retention time is less than other processes, but its denitrification and phosphorus removal effect has a certain limit, it is difficult to further improve, and it is difficult to further reduce the occupied area; SBR process It is a treatment technology operated by intermittent aeration. The core of SBR technology is the SBR reaction tank, which integrates functions such as homogenization, primary sedimentation, biodegradation, and secondary sedimentation into one tank, and is especially suitable for intermittent discharge and flow changes. For larger occasions, this process is simpler than other processes, less troublesome for excess sludge disposal, less investment, less land occupation, low operating costs, resistance to organic load and toxic load impact, and flexible operation mode

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