Moving bed biofilm reactor-forward osmosis-reverse osmosis composite wastewater treatment device and nitrogen-containing organic wastewater treatment method

Abstract

The invention provides a moving bed biofilm reactor-FO-RO combined wastewater treatment device. The wastewater treatment device mainly comprises a regulation pond, a moving bed biofilm reactor, an aeration pump, an aeration tube, a RO film assembly, a FO film assembly, a regulation settling pond, a driving liquid pond, a sewage return pump and a control valve. The invention also provides an organic nitrogenous waste water treatment method adopting the wastewater treatment device. According to the wastewater treatment device, the moving bed biofilm reactor, the FO film assembly and the RO film assembly are organically and integrally coupled, so that the rate of film fouling can be effectively reduced, the wastewater treatment efficiency can be improved, and when wastewater is treated with the method, the wastewater treatment effect can be enhanced, and the wastewater treatment cost can be reduced.

Description

technical field [0001] The invention belongs to the field of waste water treatment, in particular to a moving bed biofilm reactor-forward osmosis-reverse osmosis composite waste water treatment device and a nitrogen-containing organic waste water treatment method. Background technique [0002] Moving bed biofilm reactor (Moving Bed Biofilm Reactor, MBBR), also known as suspended packing bioreactor, is used in the wastewater biological treatment process with biofilm method as the main process. The MBBR process has the advantages of both biological fluidized bed and biological contact oxidation, and has good nitrogen and phosphorus removal effects. In recent years, it has received more and more attention. At present, the process has been applied to industrial wastewater and Reports in the treatment of domestic sewage. [0003] The effluent of the MBBR process contains a lot of suspended sludge, and it needs to cooperate with the sedimentation tank to settle the suspended slud...

AI Technical Summary

Problems solved by technology

[0003] The effluent of the MBBR process contains a lot of suspended sludge, and it needs to cooperate with the sedimentation tank to settle the suspended sludge before it can be discharged. However, the sedimentation performance of the suspended sludge contained in the effluent of the MBBR process is poor. Even after sedimentation in the sedimentation tank, the quality of the effluent water It is also difficult to meet the standard, and the use of MBBR process combined with the treatment method of sedimentation tank is not conducive to the improvement of wastewater treatment efficiency

In order to solve the problem that the effluent water quality of the above-mentioned process is not up to standard due to the poor settling performance of the suspended sludge, the existing technology adopts the membrane filtration MBBR process that combines the MBBR process with a pressure-driven membrane filtration module, that is, the MBBR and pressure-driven membrane filtration components are used. The wastewater treatment device of the reverse osmosis membrane module passes the wastewater treated by the MBBR process directly through the treated water of the reverse osmosis membrane module, or uses the wastewater treatment device containing MBBR and other pressure-driven membrane filtration modules to pass the wastewater treated by the MBBR process through Filtered effluent from other pressure-driven membrane filtration modules

However, since the effluent of the MBBR process contains a large number of filamentous bacteria and a large number of tiny particles that can block the membrane pores, under the pressure drive, the filamentous bacteria and tiny particles in the wastewater will quickly form on the reverse osmosis membrane or filter membrane. The dense and thick filter cake seriously affects the efficiency of wastewater treatment, and during the operation of the process, frequent shutdowns are required to clean or replace the membrane, which not only affects the continuous operation of the process, further reduces the efficiency of wastewater treatment, but also increases Operation and Maintenance Costs

In addition, for pressure-driven membrane filtration components, additional equipment or components are required to provide the necessary pressure for membrane filtration during wastewater treatment, resulting in the energy consumption of this process that combines the MBBR process with pressure-driven membrane filtration components. Too high, increasing operating costs

Due to the above reasons, the practical application of this membrane filtration MBBR process that combines the MBBR process with a pressure-driven membrane filtration module has been greatly limited.

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