A kind of preparation method of high-efficiency water purification agent

Abstract

The invention provides a method for preparing a water purifying agent carrier that is pollution-free, does not need to be recycled, has abundant raw materials, large adsorption capacity, and good use effect. Through reduction-sulfurization, the adsorption site of culture medium sulfide bacteria is set on the surface of the carrier. This makes the water purification agent have a large load of bacteria, a high survival rate, a large bacterial flora advantage, and high purification efficiency.

Description

technical field [0001] The invention belongs to the field of water body purification, and in particular relates to a sulfur-oxidizing bacteria bioactive purifying agent based on a macroporous mesoporous silica carrier, a preparation method thereof, and an application thereof. Background technique [0002] Studies have shown that in today's aquaculture process, due to the low bait utilization rate, excessive discharge of residual bait, and excessive discharge of farmed animal feces, eutrophication of water bodies, C, N, and P enrichment pollution of sediments and sediment oxidation are caused. The reduction potential is lowered. Increased eutrophication of water bodies will lead to excessive ammonia nitrogen and nitrite, which will have a toxic effect on aquatic animals. The discharge of a large amount of aquaculture wastewater has caused a huge impact on the surrounding environment. The water environment has deteriorated, red tides have occurred frequently, and ecological b...

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Problems solved by technology

For example, in the cell immobilization technology, the embedding method is to disperse the cells into the porous carrier, or use the polymer to embed the cells inside when the gel is formed, so as to achieve the purpose of fixing the cells, which is currently the most widely used. However, when using the biological metabolic function of sulfur-oxidizing bacteria to treat sulfur-containing wastewater, the metabolic activities of functional microorganisms in the reactor are often inhibited due to the high concentration of sulfide in the influent, resulting in the need for a long time for functional microorganisms. Long adaptation period, and because the adhesion of sulfur oxidizing bacteria is not strong, it is easy to lose with the effluent, so it is not easy to maintain a high concentration of sulfur oxidizing bacteria in the reactor

[0004] Such as CN103951052 A Beijing University of Technology discloses the preparation and application of a polyurethane carrier-based sulfur-oxidizing bacteria immobilized bioactive filler, blocky polyurethane foam is solidified by extruding and absorbing the embedding fluid to absorb and solidify the embedding fluid loaded with sulfur-oxidizing bacteria However, the polyurethane material has the following problems: (1) The density is single, and there are only two states of floating and sinking. In the dynamic system of water body changes, it cannot be effectively used for a long time. Suspended in water; (2) Polyurethane has no sites on the surface and is not suitable for establishing sites, so it is not suitable for selective adsorption of sulfur oxidizing bacteria; (3) Polyurethane has a single pore size and only has irregular macropores , although the large pores are good for adsorption, the specific surface area is extremely small, the fixation effect is poor, and the stability is somewhat improved; (3) Polyurethane, as an organic high polymer, will cause serious pollution. A cube with a length of 3‐5mm, a cuboid with a length, width and height of 3‐5mm, a cylinder with a diameter of 3‐5mm and a height of 3‐5mm, etc., are similar to the carrier of particles. After purifying large areas of water such as lakes and oceans, There are huge problems in recycling, which can easily cause pollution

However, the polyurethane material has the following problems: (1) the carrier is complex, and it is difficult to mix evenly, which makes it impossible to achieve homogeneous mixing, resulting in poor stability of the adsorption effect of the entire adsorbent; (2) no effective adsorption vacancies, only relying on the Sequential macroporous adsorption of bacteria, single adsorption

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