Microbial agent and preparation method thereof, and application of microbial agent in sewage treatment

Abstract

The invention discloses a microbial agent and a preparation method thereof, and application of the microbial agent in sewage treatment, belonging to the technical field of environmental protection and microorganisms. The microbial agent is a granular solid, the particle of the microbial agent is of a layered structure, and the microbial agent comprises a core, a support layer and a light layer from inside to outside, wherein each of the core and the support layer comprises a porous carbon material, a biological carbon source, a starch adhesive, a carbon sponge and a composite microbial liquid respectively, and the light layer comprises a porous carbon material, a biological carbon source, a starch adhesive and a carbon sponge. According to the preparation method, one-step forming is adopted, so the preparation steps of the granular solid material needing to be in the form of a layered structure are simplified to a great extent; and through cooperation with parameters of the steps of programmed cold / heat treatment and the like, the microbial agent provided by the invention can also solve problems existing in the structure of the solid microbial agent on the basis that the preparation method is simplified. The microbial agent is stable in structure and high in ammonia nitrogen removal efficiency.

Description

technical field [0001] The invention relates to the field of environmental protection and microorganism technology, in particular to a microbial agent, a preparation method thereof and an application in sewage treatment. Background technique [0002] Sewage treatment is the process of purifying sewage to make it meet reuse or discharge standards. With the increasingly severe global environment and resource situation, the existing sewage treatment technology is gradually unable to meet the social development process and pursue the principle of sustainable development. demand. At present, common methods of sewage treatment include traditional physical methods, chemical methods and new biological methods. Physical methods are the most environmentally friendly and energy-saving, but there must be problems with weak purification capabilities. Chemical methods also have defects such as high cost and high requirements. It is favored by people. However, because most of the traditio...

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Problems solved by technology

[0002] Sewage treatment is the process of purifying sewage to make it meet reuse or discharge standards. With the increasingly severe global environment and resource situation, the existing sewage treatment technology is gradually unable to meet the social development process and pursue the principle of sustainable development. needs

At present, common methods of sewage treatment include traditional physical methods, chemical methods and new biological methods. Physical methods are the most environmentally friendly and energy-saving, but there must be problems with weak purification capabilities. Chemical methods also have defects such as high cost and high requirements. It is favored by people. However, because most of the traditional sewage treatment microbial agents are in a liquid state, the agent and its additives cannot be recovered after use. This increases the cost again on the basis of the high cost of the biological method itself. In addition, Since the bacteria liquid is put into the waste water or sludge environment to be treated and dispersed directly, although the bacteria directly contact with the solution or suspension of the material to be treated, it also causes the growth environment of the bacteria to be directly opened to the sewage environment, resulting in bacterial colonies The growth environment is extremely unstable, which has a serious negative impact on the growth and survival of the bacterial flora and its treatment effect on sewage

However, the existing technology for preparing sewage treatment bacterial agents into a solid state is still immature, and the particle carrier / support structure is unstable or has a poor fixation effect on the bacterial flora, and the surface structure of the particles is unstable, and the material is easily broken after long-term use. Recycling, the use of a large amount of chemical substances or carbon sources / nitrogen sources that can be dissociated during the preparation process will cause secondary pollution to the water body. In order to solve these problems, multi-layer coating and programmed heat treatment can be used in the preparation process of solid bacterial agents and other methods, through such preparation steps and adjusting parameters such as raw materials, ratios, temperatures, and time in each layer and each step, to solve the above-mentioned problems, but the cost of doing so is that the preparation method is complicated, and the preparation environment, equipment and personnel requirements More, increase manpower, material resources and resource costs

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