Water treatment system in two-stage moving bed biomembrane reactor

Abstract

The invention belongs to the field of water treatment, and relates to a two-stage moving bed biomembrane reactor medium water treatment system. The two-stage moving bed biomembrane reactor medium water treatment system is characterized in that the whole process adopts a programmable PLC automatic control system; the main treatment structure is two-stage cascade connected moving bed biomembrane reactors; and the concrete process flow is as follows: domestic sewage or sewage with similar water quality enters a regulating pond through grates and then enters a first-stage MBBR reactor and a second-stage MBBR reactor in turn by pump lifting; and then the water is outputted into a depositing pond, enters a clear water pond and is reused for flushing toilet or as landscape water after cyclic ultraviolet sterilization. The two-stage moving bed biomembrane reactor medium water treatment system has the advantages that: 1 the system has good medium water treatment effects, stronger resistance to shock load and stable outputted water quality; 2 the system has simple and convenient operating management, a small floor area, convenient maintenance and little excessive sludge; and the system adopts the PLC automatic control system with high automatic degree; 3 the system adopts a mechanical aeration mode, thereby bringing about low energy consumption and good oxygenation performance without an independent blower; 4 the system adopts a cyclic ultraviolet sterilization mode without any medicament added during the whole process, thereby avoiding the secondary pollution; and 5 the system has a wide application range.

Description

technical field [0001] The invention belongs to the field of water treatment, and relates to a reclaimed water treatment system of a biological process, specifically a two-stage moving bed biofilm reactor (MBBR) reclaimed water treatment system. Background technique [0002] Reclaimed water mainly refers to non-potable miscellaneous water that can be reused within a certain range after urban sewage or domestic sewage has been treated to meet certain water quality standards, and its water quality is between that of upper water and sewage. At present, China is already the 13th water-poor country in the world. Water resources are very scarce. More than 400 cities are in a state of water shortage. A lot of inconvenience came. At the same time, a large amount of sewage discharge not only causes serious environmental pollution, but also wastes precious water resources. In today's increasingly scarce water resources, returning the treated water to greening, flushing vehicles and ...

AI Technical Summary

Problems solved by technology

[0003] In some existing reclaimed water treatment processes, the main treatment units are mostly coagulation sedimentation, air flotation or contact oxidation, membrane bioreactor, etc., according to literature (Industrial Safety and Environmental Protection, 2006, 32[6], 17) and literature (Journal of Nanjing Institute of Engineering, 2005, 3[4], 65) reported that they have disadvantages such as poor resistance to impact load, easy to block, unstable effluent quality, etc., which affect the quality of reclaimed water treatment. At the same time, the operation and maintenance costs High energy consumption and other factors also restrict the application of reclaimed water treatment equipment

On the other hand, its disinfection methods are mainly chlorine disinfection, ozone disinfection, chloramine disinfection and chlorine dioxide disinfection, and there is a risk of secondary pollution while adding drugs for disinfection

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