1、 Introduction to Volcanic Rock Filter Material Products:

Volcanic rock biofilter was first born in the United States, and China once relied on imports to achieve biofilm technology. Due to its high cost, researchers developed bioceramics to replace it. Nowadays, our company's researchers have found mineral deposits suitable for processing volcanic rock filter materials in China through investigation and research. The granular filter materials are processed through a series of processes such as beneficiation, crushing, screening, and grinding. The main components are dozens of minerals and trace elements such as silicon, aluminum, calcium, sodium, magnesium, titanium, manganese, iron, nickel, cobalt, and molybdenum. They appear as irregular particles with a color of red black brown, porous and lightweight. The particle size can be produced according to different requirements.

2、 Physical structural characteristics

Volcanic rock biofilter exhibits a rough and porous surface in terms of physical microstructure, which is particularly suitable for microbial growth, reproduction, and the formation of biofilms on its surface. Volcanic rock filter material enables aerated biofilters to not only treat municipal wastewater, but also biodegradable organic industrial wastewater, domestic drainage, micro polluted source water, etc. It can also replace quartz sand, activated carbon, smokeless coal, etc. as filtration media in water treatment. At the same time, it can also deeply treat the effluent that has passed the secondary treatment process of sewage treatment plants. After the treated effluent meets the standards for reuse, it can be reused as reclaimed water.

3、 Chemical structural characteristics

The chemical microstructure of volcanic rock biofilter is as follows:

1. Microbial chemical stability: Volcanic rock biofilter is corrosion-resistant, inert, and does not participate in the biochemical reactions of biofilms in the environment.

2. Surface Electricity and Hydrophilicity: Volcanic rock biofilter has a positive charge on its surface, which is conducive to the growth of microorganisms. It has strong hydrophilicity, a large amount of attached biofilm, and a fast speed.

3. In terms of its impact on biofilm activity, volcanic rock biofilter, as a biofilm carrier, is harmless and has no inhibitory effect on the fixed microorganisms. Practice has proven that it does not affect the activity of microorganisms.

4、 Hydraulic characteristics
The performance of volcanic rock biofilter in hydraulics is as follows:

1. Void ratio: The average porosity inside and outside is around 40%, which has low resistance to water. Compared with similar filter materials, it requires less filter material and can still achieve the expected filtration target.

2. Specific surface area: With a large specific surface area, high porosity, and inertness, it is conducive to the contact, film formation, and growth of microorganisms, maintaining a large microbial population, and facilitating the mass transfer of oxygen, nutrients, and waste generated during microbial metabolism.

3. The shape of filter material and the flow state of water: Due to the fact that volcanic rock biological filter material is non pointed granular and the pore size is mostly larger than ceramic particles, it has less resistance to water flow during use, saving energy consumption.

5、 The average parameters for physical performance testing of volcanic rock biological filter media are as follows