Mercury-containing waste water processing method and device
A waste water treatment, waste water technology, applied in the direction of special compound water treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc., to achieve the effect of low cost, high stability and low price
Active Publication Date: 2019-08-09
SOUTH CHINA NORMAL UNIVERSITY
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Problems solved by technology
[0005] The purpose of the present invention is to solve the problems of the above-mentioned treatment methods and provide a novel method and device for biological reduction treatment of elemental sulfur in mercury-containing wastewater
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Embodiment 1
[0043] After inoculating the sludge from the sewage treatment plant, use a 3L Erlenmeyer flask to place it in an anaerobic environment at 27°C for sealing and agitation for domestication, add elemental sulfur and nutrient solution containing organic carbon every two days, and detect the amount of sulfide produced every day , when the amount of sulfide produced is stable, take a part out and carry out the test with 5mg / LHg 2+The mercury-containing wastewater was contacted for 48 hours in a batch experiment to measure the removal of mercury ions and the production of methylmercury. After confirming that mercury ions can be completely removed and no methylmercury is produced, the cultured elemental sulfur-reducing bacteria were inoculated into the column In a sequential batch reactor. The reactor cycle is 24h, half of the supernatant liquid in the reactor is discharged into the outlet bucket through the pump in each cycle, and then half of the influent water is pumped in from the...
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The invention discloses a mercury-containing waste water processing method. According to the mercury-containing waste water processing method, elemental sulfur reducing bacteria is adopted to processmercury-containing waste water through biological reduction processing, introduced water mercury concentration is controlled in a random range (0 to 50mg / LHg<2+>), no methylmercury accumulation is caused. The cost of the method is extremely low; extremely economical advantages are achieved. The mercury-containing waste water processing method is high and stable in efficiency, when mercury contentis 50mg / L, the stable removing efficiency is larger than 99.9%, when mercury content ranges from 5 to 20mg / L, the stable removing efficiency is larger than 99.0%, after about 300 days of operation ofthe mercury containing waste water biological technology, high concentration mercury containing waste water with a concentration as high as 50mg / L can be processed, tolerance on high concentration Hg<2+> impact is achieved, biological activity recovery period is 7 days or shorter, mercury containing waste water can be introduced into a sulfur production microbial reactor for synchronization biological sulfur production and mercury removing, no independent adoption of bioreactor and mixing precipitation reactor is needed, and the structure of the sulfur production microbial reactor is various.
Description
technical field [0001] The invention relates to a wastewater treatment method and device, in particular to a method and device for directly treating mercury-containing wastewater by using sulfur-producing microorganisms. Background technique [0002] Mercury-containing wastewater is one of the most harmful industrial wastewater in the world. Mercury and its compounds discharged into water bodies form various forms of mercury through physical, chemical and biological actions, especially methylmercury, which is the most toxic, which is harmful to aquatic organisms and human health. Mercury-containing wastewater mainly comes from chlor-alkali chemical plants (mercury method), non-ferrous metal smelters (flue gas washing), amalgam recovery of precious metals, pesticide plants (insecticides, fungicides, fungicides, seed selection agents, etc.), chemical Industry (catalyst), paper industry (fungicide, viscous agent and flocculation remover, etc.). The concentration of mercury in...
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IPC IPC(8): C02F3/34C02F3/28C02F101/20
CPCC02F3/34C02F3/28C02F2305/06C02F2101/20
Inventor 江峰汪进婷
Owner SOUTH CHINA NORMAL UNIVERSITY