Treatment method and device for synchronously removing selenium pollution and sulfide pollution

A technology of treatment method and treatment device, which is applied in the direction of water/sludge/sewage treatment, water pollutants, anaerobic digestion treatment, etc., can solve the problems of numerous process sections, complicated operation, and unfavorable large-scale promotion and application, and achieve The effect of improving treatment efficiency, high removal rate, and reducing carbon source consumption

Active Publication Date: 2021-01-01
ZHEJIANG UNIV
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Problems solved by technology

This method can remove selenium pollutants in wastewater and sulfur dioxide in flue gas at the same time, but the operation is complicated and the process steps are various, which is not conducive to large-scale application

Method used

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  • Treatment method and device for synchronously removing selenium pollution and sulfide pollution
  • Treatment method and device for synchronously removing selenium pollution and sulfide pollution
  • Treatment method and device for synchronously removing selenium pollution and sulfide pollution

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Embodiment 1

[0047] In this example, using figure 1 The device shown and the technological process of the present invention treat simulated wastewater.

[0048] The simulated wastewater containing selenate and sulfide were respectively configured. The water quality of selenium-containing wastewater is: the pH is 7.2, and the selenate ion (SeO2) in the wastewater is determined by ion chromatography. 4 2- ) concentration is 40mg / L. The water quality of sulfur-containing wastewater is: pH is 9.8, and the sulfur ion (S 2- ) concentration is 67.2mg / L.

[0049] A conventional upflow anaerobic membrane bioreactor is used as the place for selenium-containing wastewater treatment, in which the biological inoculation is taken from selenate-reducing bacteria enriched in the laboratory environment. The reactor includes a PVDF membrane module with a pore size of 0.5 μm. It is used to intercept selenate-reducing bacteria; the lid adopts a flange structure, and is fixed by 8 M8 bolt nut assemblies a...

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Abstract

The invention discloses a treatment method and device for synchronously removing selenium pollution and sulfide pollution, and belongs to the technical field of environment-friendly wastewater treatment. The treatment method for synchronously removing selenium pollution and sulfide pollution comprises the following steps: reducing selenate ions (SeO4<2->) in wastewater into selenite ions (SeO3<2->) in an anaerobic bioreactor; using an intermediate collecting device to collect the reacted selenium-containing wastewater after the selenium-containing wastewater passes through a membrane; using apH adjusting device to adjust the pH of the selenium-containing wastewater after reaction; introducing the selenium-containing wastewater with the adjusted pH into a reaction device to react with sulfide-containing wastewater so as to remove selenium and sulfur pollutants synchronously; and collecting reacted wastewater by a final collecting device. According to the method, the sulfide-containingwastewater can be used for treating the selenium-containing wastewater, the purpose of treating waste with waste is achieved, the removal rate of selenium and sulfur is high, carbon source consumptionis low, and the operation is easy and convenient.

Description

technical field [0001] The invention belongs to the technical field of environmental protection wastewater treatment, and in particular relates to a treatment method and device for synchronously removing selenate / selenite and sulfide pollution. Background technique [0002] With the continuous advancement of my country's industrialization, water pollution by selenium is becoming more and more serious. Selenium pollution widely exists in various industrial wastewater, such as petrochemical industry, flue gas desulfurization wastewater, etc. 4 2- ) and selenite (SeO 3 2- ) form exists. Selenium pollution will seriously threaten human and ecological health. Excessive intake of selenium in the human body will cause symptoms such as hair loss, tooth corrosion, and nervous system abnormalities. Selenium pollution in waters will cause selenium poisoning symptoms and even death in fish and birds. Therefore, the control of selenium pollution is urgent. [0003] The toxicity and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/28C02F1/70C02F1/72C02F101/10
CPCC02F3/28C02F1/70C02F1/72C02F2101/106C02F2101/101C02F2209/44C02F2209/06
Inventor 赵和平石凌栋季涵睿金锐
Owner ZHEJIANG UNIV
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