Efficient purification composite biological filler and preparation method thereof

Abstract

The invention discloses a preparation method of an efficient purification composite biological filler, which is characterized in that the efficient purification composite biological filler comprises a filter layer filler, a deep purification layer filler and a gravel layer filler which are sequentially arranged from top to bottom; the filter layer filler is composed of quartz sand, carborundum and diatomite biological ceramsite, and zero-valent iron, activated carbon, a compound microbial agent and a porous slow-release biomass carbon source are added into the deep purification layer filler. According to the invention, nitrification and denitrification are realized in the same reactor, ideal reaction conditions are provided for biochemical reaction, physical adsorption and biochemical reaction processes are synergistically enhanced, efficient pollutant removal and water purification effects are achieved, especially, the removal effect on pollutants such as nitrogen and phosphorus is obvious, and the method is suitable for industrial production. The device has the advantages of high efficiency, integration, high durability and the like, and can be widely applied to water treatment facilities such as constructed wetlands, ecological filters, water treatment biological unit modules, rainwater gardens, ecological oxidation ponds and the like.

Description

technical field [0001] The invention belongs to the technical field of water purification, and in particular relates to a high-efficiency purification composite biological filler for water purification treatment and a preparation method thereof. Background technique [0002] Commonly used water purification methods include physical, chemical and biological methods, among which physical methods often fail to achieve the desired effect when used alone, and the by-products produced by chemical methods may cause secondary pollution. In contrast, biological methods have low energy consumption and ecological , safety, and high efficiency, among which the application of microorganisms has become an important means of biological treatment of sewage. There are many ways to use microbial agents, including direct dosing, carrier immobilization, etc. Among them, the microbial carrier immobilization method provides an ideal space for the contact reaction between microorganisms and pollut...

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Problems solved by technology

Among the existing disclosed biological fillers, the biological filter filler (invention patent CN201110134017.2) uses zeolite ore and cement as raw materials, and obtains particle fillers with a particle size of 2-10mm through pelletizing discs or extruders. Simultaneous denitrification and phosphorus removal can be achieved under the same conditions, but the filler itself only has a carrier skeleton, and the start-up time of the loaded microorganism operation is long, the synergy between the microorganism and the carrier is weak, and the water purification effect is not good.

A new type of biological filler (utility model CN201620491223.7) is made by mixing sandstone aggregate and microbial culture medium evenly and then bonding them with a cement to form a filler block. The biofilm is attached to the surface of the filler block. It is easy to cause the biofilm to fall off due to erosion. Response performance cannot be guaranteed

A microbial filler (invention patent CN201510560280.6) loads the composite microbial agent on the fly ash nano-modified filler. There is a good synergy between the agent and the modified filler, but the application in wastewater treatment is Scattered investment, high cost of recycling and treatment, and the persistence of pollutant removal effect is not strong without carbon source supplementation, continuous investment is required to maintain the effect

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