Higgins Matthew J, Chen Yen-Chih, Yarosz Douglas P, Murthy Sudhir N, Maas Nick A, Glindemann Dietmar, Novak John T
Department of Civil and Environmental Engineering, Bucknell University, Lewisburg, Pennsylvania 17837, USA.
Water Environ Res. 2006 Mar;78(3):243-52. doi: 10.2175/106143005x90065.
The objectives of this research were to elucidate the mechanisms for production and degradation of volatile organic sulfur compounds (VOSCs), key odor causing compounds produced by biosolids. These compounds included methanethiol (MT), dimethyl sulfide (DMS), and dimethyl disulfide (DMDS). A series of experiments were used to probe various pathways hypothesized to produce and degrade these VOSCs. The production of MT was found to mainly occur from degradation of methionine and the methylation of hydrogen sulfide. DMS was formed through the methylation of MT. DMDS was formed by MT oxidation. All three of the VOSCs were readily degraded by methanogens and a cyclic pathway was proposed to describe the production and degradation of VOSCs. The research demonstrated that the main source of VOSCs was the biodegradation of protein within the biosolids and the results provided a framework for understanding the production of odor from anaerobically digested sludges before and after dewatering.
本研究的目的是阐明挥发性有机硫化合物（VOSCs）的产生和降解机制，VOSCs是生物固体产生的关键致臭化合物。这些化合物包括甲硫醇（MT）、二甲基硫醚（DMS）和二甲基二硫醚（DMDS）。通过一系列实验来探究各种推测的产生和降解这些VOSCs的途径。发现MT的产生主要源于蛋氨酸的降解和硫化氢的甲基化。DMS通过MT的甲基化形成。DMDS由MT氧化形成。所有这三种VOSCs都很容易被产甲烷菌降解，并提出了一个循环途径来描述VOSCs的产生和降解。该研究表明，VOSCs的主要来源是生物固体中蛋白质的生物降解，研究结果为理解脱水前后厌氧消化污泥的气味产生提供了一个框架。
