Chemical pretreatment + two-stage biological treatment

— Technical Overview —

This technical product takes the two-stage biological treatment process unit as the core, and adopts the combined process of biological trickling filtration and biological filter to adsorb and degrade the odorous gases, VOCs and other substances attached to the biological filler. The first biological stage and the second biological stage select different types of bacteria, and control the environmental conditions of the circulating fluid to remove different types of waste gas substances. The chemical pretreatment unit pretreats sulfur series, ammonia series and some soluble VOCs in the exhaust gas to reduce the processing load of the two-stage biological treatment unit.

Biological strains are independently developed by our company to enhance biochemical properties. The biological bed uses composite fillers to ensure certain nutritional components, and maintains the environmental conditions of the circulating liquid through auxiliary measures (adding acid/lye, heat tracing, etc.). In order to meet the most suitable living environment for bacteria, ensure the stable discharge of exhaust gas (VOCs≤120mg/m³, H2S≤0.33kg/h, NH3≤4.9kg/h, odor concentration less than 500 (dimensionless).

— Technical Value —

(1) The chemical pretreatment section is used as an auxiliary process to reduce the waste gas treatment load of the two-stage biological treatment section and improve the removal efficiency of the waste gas treatment system;

(2) The two-stage biological treatment section adopts our mature biological trickling filtration and biological filter technology, which can effectively ensure the residence time of waste gas in the packed bed and maximize the waste gas treatment effect. The waste gas treatment process is all biochemical reactions, no secondary pollution is generated, and the waste gas is finally oxidized into CO2, H2O, etc.

(3) Our company has an original strain culture technology, optimizes the screening of strains that meet the actual needs, and cultivates corresponding strains according to the exhaust gas components to adsorb and degrade odor-causing substances;

(4) It has the ability to screen, cultivate, and inoculate strains, and has the necessary equipment and facilities for strain isolation, inoculation, preservation, and domestication;

(5) The exhaust emission indicators meet the requirements of VOCs≤120mg/m³, H2S≤0.33kg/h, NH3≤4.9kg/h, and the odor concentration is less than 500 (dimensionless).

— Process Flow Chart —

— Typical Case —

On-site picture of waste gas treatment device

— Application Field —

KG-ZH technology products are suitable for waste gas treatment in places with low concentration and continuous emission of malodorous gases. The main application industries are:

Petrochemical & Coal Chemical Industry;

Sewage Treatment Plant (including water treatment plant);

Fine Chemical & Pharmaceutical Chemical Industry;

Textile, Dyeing & Chemical Fiber Industry;

Painting Industry;

Rubber & Plastic Industry;

Paper Industry;

Printing Industry;

Steel Industry;