Beijing Shunyi volcanic rock biological filter material

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: , Song Dynasty. 1.
: .<: Volcanic rock biological filter material is a biological filler used in aerated biological filters.
<: . .Mainly used as biological carrier for biological water treatment. This product was first born in the United States. China once relied on imports to implement biofilm coating technology. Due to its high cost, scientific researchers developed bioceramics to replace it. The effect is not very satisfactory and the cost is high. Today, national geological research experts have found better mineral deposits in China
<: volcanic rock biological filter material
. The granular filter material is processed through a series of processes such as mineral processing, finishing and activation. Its main components are dozens of minerals and trace elements such as silicon, aluminum, calcium, sodium, magnesium, titanium, manganese, iron, nickel, cobalt and molybdenum. It appears as irregular particles and is dark brown or gray brown in color. It is porous and light, and the particle size of the particles can be produced according to different requirements. Filters using volcanic rock filter materials can not only treat municipal sewage, river and lake environmental water, biodegradable organic industrial wastewater, domestic miscellaneous drainage, slightly polluted source water, petroleum filtration, etc., but can also replace quartz sand, activated carbon, etc. in water supply treatment. Anthracite, etc. are used as filter media. At the same time, the tail water that has passed through the secondary treatment process of the sewage treatment plant can be deeply treated. After the treated water reaches the reuse water standard, it can be reused as reclaimed water. The volcanic rock filter material is being used for its high quality. With excellent filtration effect and low market price, it is used in all aspects of water treatment and has been recognized and supported by more people in the industry.
<: . <: . .2. Physical structural characteristics
<: . <: Volcanic rock biological filter material
.In terms of physical microstructure, it is characterized by: rough surface and many micropores. These characteristics It is particularly suitable for microorganisms to grow and reproduce on its surface to form biofilms. The volcanic rock filter material allows the aerated biological filter to not only treat municipal sewage, but also biochemical organic industrial wastewater, domestic drainage, slightly polluted water, etc., and can also replace quartz sand, activated carbon, anthracite, etc. as filter media in water supply treatment. , and at the same time, the tail water that has passed through the secondary treatment process of the sewage treatment plant can be deeply treated. The treated water can be reused as reclaimed water after it reaches the reuse water standard.
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<: Volcanic rock biological filter material
. Anti-corrosion, inert, and does not participate in the biochemical reactions of biofilms in the environment. , Surface electricity and hydrophilicity:
<: Volcanic rock biological filter material
. The surface has a positive charge, which is conducive to the fixed growth of microorganisms. It is highly hydrophilic and has a large amount of attached biofilm and a fast speed. . , Impact on biofilm activity: As a biofilm carrier,
<: volcanic rock biological filter material
It is harmless to the fixed microorganisms and has no inhibitory effect. Practice has proved that it does not affect the activity of microorganisms.
<:. Porosity: The average internal and external porosity is around %, which has low resistance to water. At the same time, compared with similar filter materials, it requires less filter material and can also achieve the expected filtration goals. , Specific surface area: Large specific surface area, high porosity and inertness, which is conducive to the contact and growth of microorganisms, maintains a large amount of microorganisms, and is conducive to the oxygen and nutrients required in the metabolic process of microorganisms and the waste generated by metabolism. mass transfer process. , Filter material shape and water flow pattern: Since the volcanic rock biological filter material is sharp-free and most of the pore sizes are larger than ceramsite, it has little resistance to water flow during use and saves energy consumption.