The core of the autotrophic denitrification technology is the Fe-S coupled biological carrier independently developed by Long Antai. The biological carrier is composed of Fe-S nano-micronuclei and alkalinity load, which has a large specific surface area and high efficiency. Its working principle is that in an anaerobic environment, the denitrifying bacteria use Fe-S nano-micronuclei as electron donors, nitro pollutants such as NO3- and NO2- as electron acceptors, and inorganic carbon (CO2, HCO3-, CO32-) as metabolic carbon sources to convert pollutants such as NO3- and NO2- in wastewater into N2; the alkalinity load is evenly distributed inside the pore volume of the coupled biological carrier, which can form a synergistic mechanism with the Fe-S nano-micronuclei, effectively balance the pH of the denitrification process, and achieve self-sustaining alkalinity activity in the water environment; at the same time, the introduction of Fe-S nano-micronuclei can effectively promote the metabolic coupling of microorganisms, realize the self-activation of the denitrification reaction process, and ultimately achieve efficient, continuous and stable denitrification.
Technical advantages
(1) Stable chemical properties, long life and reusable.
(2) No chemical agents are added, reducing treatment costs and preventing COD from exceeding the standard.
(3) Short residence time and fast degradation rate.
(4) No large amount of sludge is produced, reducing sludge treatment costs.
(5) Simple process equipment and high degree of operation automation.
(6) Supporting facilities can be constructed and equipped according to scale and user requirements to meet various needs.
Application areas
(1) Chemical wastewater, printing and dyeing wastewater denitrification, aquaculture wastewater
(2) Municipal sewage upgrading and transformation, river water and surface water denitrification
Precautions for use
1. Influent pH: 6-9
2. Influent salt content ≤20000mg/L
3. Influent dissolved oxygen ≤2mg/L
4. Influent hardness ≤1000mg/L
5. Influent is non-toxic and harmless
Parameter Table
| Number |
Model |
Particle size(mm) |
Total void ratio(%) |
Bulk density(T/m3) |
Remark |
| 1 |
LSF-T5 |
10-30 |
≥40 |
1.15±0.5 |
Customizable |
| 2 |
LSF-T7 |
2-8 |
≥35 |
1.15±0.5 |
Customizable |
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