BioGaT

BIOGAT is particularly suitable for the significant reduction of H₂S and CS₂ (low concentration) in waste gas for the following industries:

1. Pulp and Paper industry
2. Fibre industry
3. Chemical and pharmaceutical industry
4. Meat production, animal disposal

Features

1. Efficiency: 
   up to 98% for H₂S 
   up to 90% for CS₂
2. Column units each treating 15,000 to 30,000 m³ per hour
3. Low operation costs
4. Low waste water generation
5. Minimal maintenance requirements

In Detail

The BIOGAT process significantly reduces carbon disulfide and hydrogen sulfide in waste gases of viscose production processes. H₂S and CS₂ are converted to diluted sulfuric acid, carbon dioxide and biomass. The decomposition of CS₂ and H₂S is catalyzed by microorganisms immobilized in carrier layers (saddle packing).

The gas passes through four column treatment layers. Each treatment layer reduces H₂S and CS₂ concentrations by a certain amount, achieving the desired cleaning efficiency at the end of the process.

The biomass requires moisturizing by water spray application in order to maintain proper operating conditions and to wash out the accumulating sulfuric acid. Acid concentration is kept at the required level by dosing water into the system, based on conductivity parameters.

The biomass acts as a catalyst and is not involved in any of the chemical reactions.

CS₂ + H₂O ↔ COS + H₂S

COS + H₂O ↔ CO₂ + H₂S

H₂S + 2 O₂ ↔ H₂SO₄

The amount of excess water leaving the system is equal to the amount of water dosed into the system. Therefore BIOGAT technology requires no neutralization of the water system.

The microorganisms require adequate nutrition to keep the biomass operational. Nutritional elements are dosed in small quantities, according to actual demand.

The packed layers require annual cleaning due to biomass buildup.

The BIOGAT process is particularly suited to cleaning exhaust gases with low concentrations from the production of viscose, plant protection agents and similar products.

Reference plants:

CASE TECH in WALSRODE, GERMANY
treatment in four columns at 66.000 m³ per hour with concentrations of CS₂/m³ at 400 mg and H₂S/m3 at 100 mg. The CASE TECH BIOGAT plant has been successfully
in operation since 1994.
Efficiency: H₂S up to 98%, CS₂ up to 90% 

BAODING, CHINA
four columns processing 100,000 m³/h
H₂S up to 400 mg/m³
CS₂ up to 400 mg/m³

FABELTA, BELGIUM
Step 1
four columns processing 100,000 m³/h
H₂S: 57 mg/m³
CS₂: 460 mg/m³

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