Immobilized bacteria combined multi-component solid carbon source pellet and preparation method thereof

Abstract

The invention discloses an immobilized bacteria combined multi-component solid carbon source pellet and a preparation method thereof. The preparation method includes the following steps: (1) pretreating husks; (2) preparing a polyvinyl alcohol-sodium alginate-husk mixture; (3) adding manganese chloride and growth factors or the manganese chloride, sodium molybdate and the growth factors to the polyvinyl alcohol-sodium alginate-husk mixture to obtain a multi-component mixture; and (4) adding a bacterial suspension containing denitrifying bacteria to the multi-component mixture, and extruding the mixture of the bacterial suspension and the multi-component mixture to a CaCl2 solution for a cross-linking reaction to obtain the immobilized bacteria combined multi-component solid carbon source pellet. The immobilized bacteria combined multi-component solid carbon source pellet of the invention can provide a stable carbon source for low carbon-nitrogen ratio sewage, can realize a efficient and stable denitrification process, and has the advantages of maintaining the activity of immobilized bacteria for a long time, promoting the formation of a nitrate reductase and enhancing the nitrogenremoval efficiency of the immobilized bacteria.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to an immobilized bacteria-combined multi-component solid carbon source pellet and a preparation method thereof. Background technique [0002] Eutrophication refers to the phenomenon of water pollution caused by excessive plant nutrients such as nitrogen and phosphorus. It will lead to the destruction of aquatic biodiversity, and then cause the aquatic ecosystem to lose its self-sustainment, self-regulation ability and system balance stability, and finally lead to the destruction of aquatic ecosystem and the aggravation of environmental problems. [0003] With the rapid development of my country's economy and society and the acceleration of urbanization, although urban domestic sewage and industrial wastewater can be effectively treated, low-carbon and high-nitrogen sewage such as polluted urban water bodies and non-point source pollutants formed by rainwater ru...

AI Technical Summary

Problems solved by technology

Although many researchers have adopted the method of adding external carbon sources, especially plant biomass solid carbon sources, in practical applications, there is a risk of deterioration of effluent quality, and when choosing the type of exogenous carbon, dosing method, There is a lack of systematic research on the amount of dosage, the kinetic model of nitrogen after adding exogenous carbon, and the effect on nitrogen removal.

Therefore, it is difficult to effectively guarantee the denitrification effect, and it will also seriously affect the denitrification efficiency.

Images