Optimization of Hydrogen Sulfide Bio Filter Performance, a Systematic Review

The study of biological removal of volatile inorganic compounds has been widely conducted. Most studies have focused on H۲S and other sulfur or nitrogen-containing compounds such as sulfides, mercaptans, methane thiol, or ammonia. The removal of H۲S from wastewater treatment plants was investigated in ۱۹۲۳, and the oldest recorded article is from ۱۹۳۴. In various studies that have been conducted so far to remove pollutants including H۲S, different biological systems have been used. As mentioned earlier, these biological systems include bio filters, trickling bio filters, and biological scrubbers. The use of bio filters with organic substrates is more commonly used for biological treatment of volatile inorganic compounds. Since microorganisms grow as biofilms on packing materials and absorb, decompose, and convert pollutants into non-harmful substances. Therefore, the selection of the appropriate microorganism in biological treatment will play an important role. For the removal of sulfur-containing compounds in bio filters, microbial species of the genera Thiobacillus and Hyphomicrobium are often considered very desirable decomposers. Volatile organic compounds can also be treated by specialized microorganisms. These compounds include halogenated aliphatic and other halogenated and aromatic pollutants. The dominant microorganisms in VOC-purifying bio filters are heterotrophs that require an organic carbon source and are unable to use carbon dioxide as the sole carbon source. Removal capacity, which indicates the rate of pollutant removal at a given mass load and is defined as the mass of pollutant removed per unit bed volume per unit time, is an important parameter in biological removal processes. This parameter for different pollutants in the biological treatment of VIC can vary from a few grams to more than ۲۰۰ grams per cubic meter per hour of inlet gas with a removal efficiency of over ۹۰%, and this parameter has been reported as one of the main parameters in various articles

کلیدواژه ها:

Thiobacillus ، Hyphomicrobium ، H۲S ، Microorganism ، Biological Treatment