Removal of dimethyl disulfide by the peat seeded with night soil sludge |
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| Institution: | 1. Pharmacy Experimental Center, Harbin Medical University - Daqing, Daqing, Heilongjiang 163319, PR China;2. Department of Pharmaceutical, Harbin Medical University - Daqing, Daqing, Heilongjiang 163319, PR China;3. Department of Chemistry, Harbin Medical University - Daqing, Daqing, Heilongjiang 163319, PR China;4. Department of Pathology, Harbin Medical University - Daqing, Daqing, Heilongjiang 163319, PR China;5. Department of Endocrinology, The Fifth Hospital of Daqing, Daqing, Heilongjiang 163714, PR China;6. Department of Natural Medicinal Chemistry, Harbin Medical University - Daqing, Daqing, Heilongjiang 163319, PR China;7. Department of Pathophysiology, Harbin Medical University – Daqing, Daqing, Heilongjiang 163319, PR China |
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| Abstract: | The removal characteristics of dimethyl disulfide (DMDS) with a fibrous peat biofilter were studied. The peat itself did not remove DMDS. The peat inoculated with aerobically-digested night soil sludge as a source of microorganisms showed an efficient removal of DMDS with the maximum removal rate, 0.68 g-S·kg-dry peat−1·d−1 and the saturation constant, 1 ppm. The removal rate of DMDS by the biofilter decreased when pH was below 5.5. The number of microorganisms isolated on thiosulfate-agar plates (pH 7) remarkably increased in DMDS-acclimated peat. Similar removal characteristics and the change in microflora were observed in methanethiol (MT)- and dimethyl sulfide (DMS)-acclimated peat. These results indicated that some chemolithotrophic and non-acidophilic sulfur-oxidizing microorganisms such as Thiobacilli, originating from night soil sludge, were responsible for degradation of these organosulfur compounds in the peat biofilter. |
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