Membrane distillation bioreactor device and method

A bioreactor and membrane distillation technology, applied in the field of membrane distillation, can solve the problems of large floor space and poor color removal effect, and achieve the effects of small floor space, improved activity and simple process flow

Inactive Publication Date: 2010-03-03
GO HIGHER ENVIRONMENT GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to fully degrade organic matter, it is necessary to ensure sufficient hydraulic retention time of the bioreactor, which occupies a relatively large area
[0006] (3) For industrial wastewater with large chroma, such as tobacco wastewater, printing and dyeing wastewater, etc., the removal effect of MBR on chroma in wastewater is poor, and other decolorization processes need to be further adopted

Method used

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  • Membrane distillation bioreactor device and method

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Effect test

Embodiment 1

[0030] Example 1: Small test of food processing wastewater treatment and reuse project, the treatment capacity is 10m 3 / d, raw water COD cr 200-500mg / L, BOD 100-200mg / L, SS 150-200mg / L. The flow rate of the condensate is 0.42-0.46m / s, the boiling water temperature is 50°C, 60°C, and 70°C respectively, the cooling water temperature is 32-35°C, the cooling water is reverse osmosis deionized water, and the conductivity is 18.8-21.2μs / cm . The pilot test results show that the membrane flux reaches 13kg / m under all operating conditions 2 More than h, effluent COD cr less than 0.5mg / L, the conductivity of stable product water is maintained between 25.1-26.3μs / cm, compared with the conductivity value of reverse osmosis pure water (18.8-21.2μs / cm), it can be concluded that the membrane module has no obvious permeability Leakage phenomenon, the effect is good.

Embodiment 2

[0031] Example 2: domestic sewage treatment and reuse project, the treatment capacity is 8m 3 / d, raw water COD cr 500-1000mg / L, BOD 150-400mg / L, SS 200-450mg / L. The condensate flow rate is 0.44-0.47m / s, the wastewater temperature is 50°C, 60°C, and 70°C respectively, the cooling water temperature is 32-35°C, the cooling water is reverse osmosis deionized water, and the conductivity is 18.8-21.2μs / cm . The pilot test results show that the membrane flux reaches 13kg / m under all operating conditions 2 More than h, effluent COD cr less than 0.5mg / L, the conductivity of stable product water is maintained between 25.1-26.3μs / cm, compared with the conductivity value of reverse osmosis pure water (18.8-21.2μs / cm), it can be concluded that the membrane module has no obvious permeability Leakage phenomenon, the effect is good.

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Abstract

The invention provides a membrane distillation bioreactor device and a method for treating wastewater or waste liquid by using the device. In the membrane distillation bioreactor device, membrane distillation technology and biological degradation technology are combined, a hydrophobic microporous membrane component is immersed in a biological reactor, latent heat resources such as solar energy andwaste heat are used to heat wastewater to be treated to produce a steam pressure difference between two sides of the membrane to recover water resource, operation energy consumption is saved greatly,and operation cost is saved. A high temperature condition is favorable for improvement in the activity of microorganisms and the biological degradation speed. In the process, a membrane separation process is free from the influences of biological degradation degree, system operation starting requires short time, and effluent is stable and high in quality and meets the standards for reverse osmosis water. The device has the outstanding advantages of simple structure, simple process, low operation energy consumption, small floor area occupation, high biological degradation speed and the like and has a great practical value for the improvement and development of high organic wastewater treatment and high-purity water preparation technology.

Description

technical field [0001] The invention relates to a device of a membrane distillation bioreactor and a method for treating waste water or waste liquid by using the device, belonging to the technical fields of waste water and waste liquid treatment and membrane distillation. Background technique [0002] my country is an extremely water-scarce country, and the per capita fresh water resources are only a quarter of the world's average level. At the same time, with the rapid development of industry and the growth of population, a large amount of domestic sewage and industrial wastewater are discharged directly without treatment, causing serious pollution of the water environment and exacerbating the shortage of water resources. In order to solve the shortage of water resources and promote the sustainable development of economy and society, the "National Medium and Long-Term Science and Technology Development Program (2006-2020)" will develop seawater desalination technology and a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/44C02F1/04C02F3/12
Inventor 范正虹陈福泰刘海宁麻丽峰
Owner GO HIGHER ENVIRONMENT GRP CO LTD
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