Deep removal of nitrate nitrogen by sulfur autotrophic fillers for environmental bioremediation

The product prices on this page are for reference only. The prices may vary due to factors such as price and customized specifications. Call to get more detailed and discounted quotes!

Deep removal of nitrate nitrogen by sulfur autotrophic fillers for environmental bioremediation

【Product Overview

The autotrophic denitrification and denitrification technology is a new type of environmental bioremediation technology that can achieve deep removal of nitrate nitrogen in water without the need for external organic carbon sources.

The core of autotrophic denitrification technology is a self-developed coupled bioelectronic carrier, functional microbial agent, and non carbon source dependent deep denitrification process system.

【 Technical Principles 】

Utilizing inorganic carbon(CO2, HCO3-, CO32-) is used as a carbon source, and inorganic substances (S, S2-, H2, S2O32-, Fe, Fe2+, NH4+, etc.) are mainly used as electron donors for nitrate nitrogen reduction to complete microbial metabolism. NO in nitrate nitrogen polluted water lacking organic carbon sources is removed₃-N is reduced to N2.In coupled bioelectronic carriers, uniform distribution of alkalinity donors can effectively balance the acidity and alkalinity of denitrification processes, achieving self-sustaining biological activity; The introduction of multiple electron donors can effectively promote the metabolic coupling of microorganisms and achieve self activation of denitrification reaction processes.

[Function]Degradation of total nitrogen and ammonia nitrogenDeep nitrogen and phosphorus removal

1. Compared with nitrate nitrogen removal methods, sulfur (sulfur iron coupling) autotrophic denitrification has the advantages of low cost, no need for external carbon sources, low sludge yield, and is a promising new denitrification process;

2. Sulfur iron coupled autotrophic denitrification: Sulfur autotrophic denitrifying bacteria use sulfur as an electron donor to reduce nitrate ions in water to nitrogen and remove nitrate nitrogen from water; Elemental iron and combined iron (pyrite, pyrrhotite, siderite) provide inorganic carbon sources to support autotrophic denitrification reactions, while simultaneously releasing iron ions for chemical phosphorus removal, thereby achieving synchronous nitrogen and phosphorus removal.

3. The sulfate problem, when using sulfur (sulfur iron coupling) autotrophic denitrification process to remove nitrate, the nitrate concentration should be below 33.5gNO3N/L; By adding other substances such as Ca2+and iron salts, the concentration of sulfate can be reduced, the removal of nitrate can be increased, and a certain amount of phosphate can be removed, achieving the goal of phosphorus and nitrogen removal.

① Strong pollution carrying capacity. The surface is rich in micropores, with a large specific surface area, easy to form membranes, and high biomass. The treated effluent has high water quality.

② The pore distribution is uniform. The surface pore diameter is suitable for the growth of microorganisms in mesopores and macropores, overcoming the problems of large head loss, easy blockage, and compaction caused by uneven distribution of pores in the filter layer.

③ Moderate density. Uniform density, short backwashing time, long service life, low energy consumption, overcoming the defects of difficult control and easy material running, saving electricity and labor.

High mechanical strength. It does not contain any harmful substances to the human body and the environment, and has good biochemical and thermodynamic stability.

Deep removal of nitrate nitrogen by sulfur autotrophic fillers for environmental bioremediation