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Method for resourceful treatment of cadmium polluted wastewater

A cadmium pollution and resource recovery technology, applied in energy wastewater treatment, chemical instruments and methods, water/sewage treatment, etc., can solve problems such as not widely used in practice

Inactive Publication Date: 2009-02-18
CAPITAL NORMAL UNIVERSITY
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Problems solved by technology

[0006] The research on the use of microorganisms to remediate cadmium-contaminated soil is much earlier than that of large land plants, but the actual application is not widespread

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment

[0022] Experimental main instruments:

[0023] ST-04 trace water chromatograph (Beijing Analytical Instrument Factory), 3m long 5A molecular sieve column, thermal conductivity detector, high-purity gas spectrometer with nitrogen as carrier gas, external standard method determination, chromatographic workstation JF-9902 (Beijing Analytical Instrument Factory ), the volume of hydrogen released can be observed by the drainage gas collection method, and the hydrogen purity can be calculated.

[0024] Experimental procedure

[0025] 1 Centrifuge at 10,000g to collect Bacillus cereus (CGMCC1.1846) bacteria, wash twice with sterile water, and the OD600 of the bacteria solution used is between 0.50-0.60;

[0026] 2 Add 1 / 3 volume of sterile deionized water to the obtained bacteria paste and mix well;

[0027] 3 Add 2 times the volume of 4% sodium alginate and mix well;

[0028] 4 Add 0.05mol / l CaCl 2 Incubate in a water bath at 37°C for 10 minutes;

[0029] 5 Put the mixture of s...

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Abstract

The invention discloses a method of generating hydrogen for twice at the same time that the waste water containing cadmium heavy metal is treated by harmless biological absorption by using an algae and fungi synergistic system, and belongs to the technical field of the environmental energy source. The method is mainly characterized in that algae cell wall and fungi cell wall are cooperated to absorb the cadmium; at the same time of removing the cadmium, Chlamydomonas Reinhardtii can generate hydrogen by using the characteristic that the stress effect of the heavy metal of the Chlamydomonas Reinhardtii is similar to the deficiency effect of sulfur element during cultivation; furthermore, butyric acid clostridium is used to ferment the biomass cumulated by the photosynthesis of the Chlamydomonas Reinhardtii to re-generate hydrogen; the fungi used during cadmium absorption and hydrogen generation is treated in an immobilized way. The method has high efficiency, is easy for downstream treatment, can get clean water and a great deal of hydrogen finally with qualified cadmium concentration, and can be widely used for the clean treatment and energy recovery utilization to industrial waste water containing the cadmium.

Description

technical field [0001] The invention belongs to the technical field of environmental energy, and in particular relates to a method for clean treatment and energy utilization of cadmium-containing sewage suitable for industrial production. Background technique [0002] Water pollution by heavy metal cadmium has become one of the global environmental problems. Investigations in the early 1980s in my country found that there were varying degrees of heavy metal cadmium pollution in Jinsha River, Xiangjiang River, Jiyun River and Jinzhou Bay. The concentration of cadmium even reaches thousands of mg / L [1] ; At the end of 2005, a sudden cadmium pollution incident occurred in Beijiang, Guangdong, and the cadmium in the Mengzhouba section exceeded the standard by 12 times, which once caused the interruption of local industrial and agricultural water use. Abroad, in the first half of the 20th century, Japan's "Minamata Incident" and "Toyama Incident" heavy metal pollution cases have...

Claims

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Application Information

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IPC IPC(8): C02F1/62C02F3/34C02F1/28C02F103/20
CPCY02W10/37
Inventor 季宏兵朱万斌王海滨朱毅江用彬
Owner CAPITAL NORMAL UNIVERSITY
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