Method for treating <125>I medical wastewater through active yeast enrichment

Abstract

The invention relates to a method for treating <125>I medical wastewater through active yeast enrichment, which is mainly used for the field of clinical radioactive wastewater. In a bottle inserted with an injection needle head and added with 2 percent of brown sugar liquid, candida tropicalis, candida krusei and mixed bacteria of the candida tropicalis and the candida krusei are incubated for 48hours, and when the bacterial number is greater than 460*108 / mm<3>, the adsorption culture with <125>I-deoxyribose nucleic acid (DNA), <125>I-T3, <125>I-T4 and <125>I-radio immunoassay (RIA) medical wastewater is carried out for 24 hours. The primary saturation adsorption of the three kinds of yeast on four kinds of markers is 83.0 percent to 99.8 percent and 54.0 to 410.0 mg.g<-1>, wherein the optimum effect of the mixed bacterium adsorption on <125>I-RIA is 99.8 percent and 410 mg.g<-1>, and the adsorbed compound analysis is 10.8 percent to 12.7 percent through three-time washing. The radioactive wastewater after adsorption treatment has shallow color and no peculiar smell, the supernatant liquor CPM is smaller than 100, the radioactive activity is smaller than 10 Bq / L, and the nationalradioactive wastewater discharge standard is reached. The <125>I medical wastes through enrichment recovery is in a dry powder shape, the size is reduced by 100 times, and the continuous placement and the yeast autolysis prevention are favorably realized.

Description

(1) Technical field [0001] The invention belongs to the technical field of clinical radioactive medical wastewater treatment. Specifically relate to the strain activation and proliferation of Tropical, Candida krusei and their mixed bacteria as biosorbents, and 125 I-DNA, 125 I-T 3 , 125 I-T 4 , 125 I-RIA (radioimmunoassay) wastewater adsorption culture and enriched 125 I Technical procedures such as separation and recycling of medical waste and wastewater. (2) Background technology [0002] The basic theory and application research of using yeast as a biosorbent to treat radionuclides in the nuclear industry, organic wastewater in the food industry, and industrial heavy metal pollutants has been highly valued by scholars at home and abroad. Similar studies on the adsorption of radionuclides by yeast and related research on the treatment of organic wastewater and heavy metal pollutants by various yeasts have been reported. [0003] 1. Similar research: the focus of s...

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Problems solved by technology

[0006] 4. Question: From the specific comparison above, it can be seen that similar and related research 241 The rapid adsorption reactions of Am, uranium and heavy metal ions are mostly passive and reversible electrostatic adsorption reactions. The combination of bacteria and uranium, heavy metals and other wastes is not firm, and the original pollutants are easily resolved.

During the placement of medical wastewater, the cumulative increase in wastewater volume and the malodorous odor of protein deterioration in the wastewater are practical difficulties for the placement method.

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