Porous light-weight carbon-based biological carrier and preparation method thereof

Abstract

The invention provides a porous light-weight carbon-based biological carrier. The porous light-weight carbon-based biological carrier is a foamed coke powder / polyvinyl alcohol gel mixture which is prepared by performing crosslinking reaction on coke powder, a polyvinyl alcohol solution, a foaming agent solution and a crosslinking agent solution used as raw materials at normal temperature, wherein the weight percent concentration of the polyvinyl alcohol solution is 5-15%; the weight percent concentration of the foaming agent solution is 0.2-2%; the weight percent concentration of the crosslinking agent solution is 0.5-1.5%; the weight ratio of the polyvinyl alcohol water solution to the coke powder is (10-25):1; the weight ratio of the polyvinyl alcohol water solution to the foaming agent solution is (15-45):1; and the weight ratio of the polyvinyl alcohol water solution to the crosslinking agent solution is (20-50):1. The biological carrier is high in film-forming speed and microbial capacity, provides a proper nutrient source for microorganisms and has no harm to the environment. Meanwhile, the invention also provides a preparation method of the porous light-weight carbon-based biological carrier. The preparation method has the advantages of simple process, less required equipment and low preparation cost.

Description

technical field [0001] The invention belongs to the technical field of biofilm treatment of wastewater, and specifically refers to a porous light carbon-based biological carrier and a preparation method thereof. Background technique [0002] Activated sludge treatment of wastewater has the advantages of mature technology, low operation and maintenance costs, and is the most commonly used method for domestic water treatment. However, the activated sludge process occupies a large area, has a lot of residual sludge, poor denitrification effect, and is prone to sludge. Due to the shortcomings of bulking and sludge loss, people use the biofilm method for biochemical treatment of wastewater. Since the successful operation of the biofilter, the biofilm method has been rapidly developed and applied in recent years due to its advantages of strong degradation ability, short contact time, small footprint and low investment cost. In the biofilm method, the microbial carrier material de...

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Problems solved by technology

The existing common biological carriers have many disadvantages, such as high material cost, complex processing technology, and some environmental problems such as secondary pollution. For example, the inorganic ceramic materials used generally have high density, low porosity, small specific surface area and reaction Fluidization power consumption in the device is large; most polymer organic carriers come from petrochemical derivatives, such as polypropylene, polyethylene, etc., which have poor hydrophilicity, poor microbial film formation and microbial biomass, and some The material is photolyzed in the environment, and even has certain toxicity to environmental organisms

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