污水处理厂恶臭含硫化合物的研究

分析了污水处理厂各个不同工艺段气、液两相中恶臭有机含硫化合物的分布情况,同时运用气相色谱-质谱联用仪及吹扫-捕集系统对甲硫醇、甲硫醚、羰基硫、二硫化碳和二甲二硫等五种化合物进行了定性准确的和定量分析,并对其产生机制及来源进行了较为详实的解析.其中挥发性气体样品的采集通过动态箱收集,溶解在水体中的目标化合物运用高纯氮气吹脱收集.研究结果表明,在水相和气相中的恶臭化合物的分布在不同的处理单元呈现不同的恶臭浓度,但经过污水处理厂各工艺的深度处理后, 溶解在水体当中的恶臭含硫化合物及挥发到大气中的化合物均有明显下降,去除率均达到90%以上.

Study on odorous sulfur compounds emitted from the wastewater treatment plants

Odorous sulfur containing compounds were identified and quantified in atmosphere and water bodies taken from different process units of two different wastewater treatment plants synchronously. In this paper, methanethiol, carbonyl sulfide, dimethyl sulfide, carbon disulfide, and dimethyl disulfide were detected by using gas chromatography-mass spectrometry detector with purge and trap preconcentration system. Gas samples were collected in stainless steel canisters by dynamic box method, and the target compounds dissolved in wastewater were purged out by pure nitrogen gas. The results of this study indicated that the distribution of these odorous compounds in atmosphere and water body nearly presented an accordant variation trend. There were more than 90% of the odorous sulfur containing compounds dissolved in influent was eliminated from the in fluent to effluent. And at the same time, such odorous compounds distributing in atmosphere were also be reduced greatly.