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Photocatalytic membrane distillation printing and dyeing wastewater treatment and reuse system and process

A technology of printing and dyeing wastewater and photocatalytic membrane, which is applied in energy wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., to achieve light intensity, reduce investment and operating costs, and improve oxidation rate and effect Effect

Inactive Publication Date: 2017-02-22
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, how to improve the effect of synchronous denitrification and phosphorus removal, how to effectively create a reasonable aerobic zone, anoxic zone and anaerobic zone environment in the BAF system if the backwashing system is properly set up still needs to be further explored

Method used

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  • Photocatalytic membrane distillation printing and dyeing wastewater treatment and reuse system and process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 1 As shown, a photocatalytic membrane distillation printing and dyeing wastewater treatment and reuse system includes an ozone decomposition device 8, a solar energy absorption device 18, and a water inlet pool 1 connected in sequence, a photocatalytic degradation reaction pool 3, a membrane distillation biological reaction pool 10, and a clear water pool 17. The bottom of the water inlet tank 1 and the photocatalytic degradation reaction tank 3 is connected by the first sewage pump 2, and the upper part of the photocatalytic degradation reaction tank 3 and the bottom connecting pipe of the membrane distillation biological reaction tank 10 are provided with a second sewage pump 9, a light The bottom of the catalytic degradation reaction tank 3 and the bottom connecting pipe of the membrane distillation bioreactor 10 are provided with a second circulation pump 20, and the photocatalytic degradation reaction tank 3 and the membrane distillation bioreactor 10...

Embodiment 2

[0039] The above devices and processes are used to treat the production wastewater of a printing and dyeing enterprise in Jiangsu.

[0040] The concentration of COD (chemical oxygen demand) in the photocatalytic degradation reaction pool is 820mg / L, BOD 5 (The amount of free oxygen consumed by aerobic microorganisms to oxidize and decompose organic matter per unit volume of water on the 5th day) The concentration is 270mg / L, the average color of the influent is 370 times, the influent temperature is 16-18°C, and the pH is 7.0-8.0 , the conductivity is 2580μs / cm.

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Abstract

The invention discloses a photocatalytic film distillation printing and dyeing wastewater treatment and recovery system and technology. The treatment and recovery technology comprises the following steps: putting printing and dyeing wastewater into an aeration zone of a photocatalytic degradation reaction tank for aeration, and conducting electrodeless ultraviolet catalytic reaction on the aerated wastewater I; after reaction, pumping wastewater into a film distillation biological reaction tank for aeration, conducting desalination on the aerated wastewater II through a distillation film component, carrying out circulating cooling, repeated aeration and desalination through a first circulating pump and a condenser, and discharging qualified water through a clean water basin. The system and the technology have the advantages that the COD removing rate for wastewater reaches 99% or higher, the decolourization ratio and the desalination rate reach 99 percent or higher, highly purification of water is realized, and the water recovery and utilization rates reach 80 percent or higher.

Description

technical field [0001] The invention belongs to the field of printing and dyeing wastewater treatment, in particular to a photocatalytic membrane distillation printing and dyeing wastewater treatment and recycling system and process. Background technique [0002] The sustainable development of water resources and the development of water reuse projects have greatly promoted the development of water reuse technology, especially the reuse of printing and dyeing wastewater, and the water quality and reuse indicators are not the same. For the reuse of printing and dyeing wastewater, it mainly removes suspended particulate matter (SS), organic matter (COD / BOD), nitrogen and phosphorus compounds (N / P), inorganic ions and metal ions, salt and virus bacteria, etc. [0003] Biological aerated filter (BAF) is a process developed in the late 1980s and widely used in water reuse systems. The biological aerated filter mainly conducts advanced treatment of organic carbon pollutants, ammo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
CPCY02W10/37
Inventor 陈琳靳斌斌朱亮王俊邱云鹏刘畅
Owner HOHAI UNIV
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