Composite biological filler as well as preparation method and application thereof
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A biological filler and biological enzyme technology, applied in the field of water treatment, can solve the problems of short service life, insufficient mechanical strength, increased operation and maintenance cost and difficulty, etc.
Pending Publication Date: 2022-04-15
武汉江城泽源生态工程技术有限公司 +1
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Problems solved by technology
However, most natural cellulose materials have low mechanical strength and short service life
Since the plant carrier may block the system after the release period is over, it is generally necessary to set up a separate dosing area for future maintenance and operation. Therefore, if the life of the filler is too short and the mechanical strength is insufficient, the cost and difficulty of operation and maintenance will increase.
In addition, the total nitrogen removal rate of pure cellulose carbon source materials is difficult to reach more than 70% in practical applications. In order to achieve deep and stable removal of total nitrogen, its denitrification effect needs to be improved.
Method used
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Embodiment 1
[0040] A composite biological filler, comprising: lignocellulose, metal substances, oligosaccharides and biological enzymes;
[0041] Among them, the role of lignocellulose is: as a slow-release carbon source and a membrane carrier, it can release organic matter as an electron donor for denitrification by denitrifying bacteria under the soaking of water and the action of microorganisms, and reduce nitrate nitrogen to nitrogen. , realize denitrification of sewage;
[0042] The role of metal substances is to: reduce the oxidation-reduction potential of water, create a reducing environment that is more conducive to the survival of denitrifying bacteria, stimulate the evolution of microorganisms to increase their diversity, strengthen the aggregation of microorganisms to increase biomass, and improve biodegradability;
[0043] The role of oligosaccharides is: to modify lignocellulose, its role is to promote and induce the growth of early microorganisms, accelerate the formation of...
Embodiment 2
[0046] This embodiment is a further optimization carried out on the basis of embodiment 1, which is specifically:
[0047] The ratio of lignocellulose, metal substances, oligosaccharides and biological enzymes is 100:(50-4):(0.1-2.5):(0.005-0.02).
Embodiment 3
[0049] This embodiment is a further optimization carried out on the basis of embodiment 1 or 2, which is specifically:
[0050] Lignocellulose is the main component of plant cell walls, lignocellulose includes: cellulose, hemicellulose and lignin;
[0051] The proportion of cellulose, hemicellulose and lignin is (3-6): (2-5): (1-3);
[0053] Among them, wood includes rotten wood, and products or waste produced from raw wood;
[0054] Bamboo is a product or waste processed from raw bamboo;
[0055] Wheat stalks, corn stalks, corn cobs, bagasse, etc. are agricultural wastes;
[0056] The shape of the lignocellulose can be: fine powder, granular, filamentary, massive and other shapes.
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Abstract
The invention relates to a composite biological filler. The composite biological filler comprises lignocellulose, a metal substance, oligosaccharide and a biological enzyme. The preparation method of the composite biological filler comprises the following steps: modifying lignocellulose through oligosaccharide and biological enzyme to obtain a modified lignocellulose material; pickling and drying the metal substance; and mixing the modified lignocellulose material with a metal substance. The invention relates to an application of a composite biological filler in nitrogen and phosphorus removal. Lignocellulose is used as a slow-release carbon source and a biofilm formation carrier, and can release organic matters as electron donors for denitrification of denitrifying bacteria under the action of water soaking and microorganisms, so that nitrate nitrogen is reduced into nitrogen, and sewage denitrification is realized; the redox potential of the water body is reduced by metal substances, and a reduction environment which is more beneficial to the survival of denitrifying bacteria is created; the composite biological filler is mainly used for efficient nitrogen removal of domestic sewage, river and lake water bodies, aquaculture wastewater and the like, and has a certain phosphorus removal function.
Description
technical field [0001] The invention relates to the technical field of water treatment, in particular to a composite biological filler and its preparation method and application. Background technique [0002] Nitrogen pollution is one of the most serious problems faced by various water bodies in my country. my country's current highest total nitrogen discharge standard is Class A (GB18918-2002), but the Class A total nitrogen limit (≤15mg / L) is the surface water Class IV (total nitrogen ≤ 1.5mg / L), its secondary pollution to the water body cannot be ignored, especially when the discharged water body is a closed water body, it is even more difficult to meet the water quality requirements, so economical and efficient deep denitrification is urgently needed technology. In addition, with the continuous development of my country's economy, the increase in the use of nitrogen and phosphorus substances, and the use of a large number of agricultural chemical fertilizers have led to a...
Claims
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Application Information
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