Procedure for biological removal of hydrogen sulfide from biogas, comprises supplying the biogas and an acidically regulated wash solution in direct current into a biowasher, and dissolving air/oxygen under pressure in the wash solution

摘要

The procedure for biological removal of hydrogen sulfide from biogas, comprises supplying the biogas and an acidically regulated wash solution in direct current at 15-40[deg] C into a biowasher, dissolving air/oxygen under pressure in the wash solution, and introducing the wash solution into the biowasher for biological conversion of the hydrogen sulfide. 80-50%, 50 -20%, 20-5% and 5-1% of the wash solution are delivered in the first-, second-, third- and fourth stage respectively. The wash solution in the circulation is compressed at 1.5-3 bar. The procedure for biological removal of hydrogen sulfide from biogas, comprises supplying the biogas and an acidically regulated wash solution in direct current at 15-40[deg] C into a biowasher, dissolving air/oxygen under pressure in the wash solution, and introducing the wash solution into the biowasher for biological conversion of the hydrogen sulfide. 80-50%, 50 -20%, 20-5% and 5-1% of the wash solution are delivered in the first-, second-, third- and fourth stage respectively. The wash solution in the circulation is compressed at 1.5-3 bar. The system temperature for the biological washing is 25-35 [deg] C. The wash solution saturated with air/oxygen is dosed with hydrogen peroxide.