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Volcanic rock filter material
Volcanic rock filter material is a granular filter material made from natural porous volcanic rock ore through a series of processes such as beneficia
Product details
Product Introduction
Volcanic rock filter material is a granular filter material made from natural porous volcanic rock ore through a series of processes such as beneficiation, crushing, screening, and grinding. 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 with a color of red black brown, porous and lightweight. The particle size can be produced according to different requirements. The efficient membrane hanging lightweight filter material exhibits a rough and porous surface structure in terms of physical observation, which is particularly suitable for microorganisms to grow and reproduce on its surface, forming biofilms.
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 biofilter are as follows:
| performance index |
unit |
detection result |
performance index |
unit |
detection result |
|
unit weight |
Kg/m3 |
740 |
Specific surface area |
m2/g |
13.6-25.5 |
|
proportion |
|
1:1.29 |
compressive strength |
Mpa |
5.78 |
|
moisture content |
% |
0.9-1.0 |
Shear strength |
Mpa |
3.98 |
|
porosity |
% |
73-82 |
Friction loss rate |
% |
＜1 |
|
Remove organic matter |
% |
Above 80 |
Start hanging time |
hour |
27 |
|
cod removal rate |
% |
85 or above |
Solubility of hydrochloric acid |
% |
＜1.0 |
|
BOD removal rate |
% |
75-93 |
Dissolved substances |
Slightly containing beneficial minerals and trace components |
|
|
Remove ammonia and nitrogen |
% |
85 or above |
appearance |
Full particles, resembling spherical shapes |
|
|
chemical composition
|
SiO2 |
CaO |
MgO |
Fe2O3 |
Al2O3 |
|
Content% |
43.27 |
9.86 |
1.49 |
11.86 |
14.71 |
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