• 关键词：污泥  硫酸盐还原菌(SRB)  硫化氢  释放

• 基金项目：浙江省重大科技攻关项目(No.2005C13005);浙江省重点科技计划项目(No.2005C23051)

• 翁焕新
• 浙江大学环境与生物地球化学研究所, 杭州 310027

• 高彩霞
• 浙江大学环境与生物地球化学研究所, 杭州 310027

• 刘瓒
• 浙江大学环境与生物地球化学研究所, 杭州 310027

• 章金骏
• 浙江大学环境与生物地球化学研究所, 杭州 310027

• 摘要：根据污泥低温干化工艺的特点,通过模拟试验,深入研究了不同类型污泥硫化氢在不同状态下的释放特征及其影响因素.同时,通过培养法,分析了不同类型污泥中SRB的生活量和活性及其与硫化氢释放量的对应关系.研究结果表明:污泥SRB的生活量越大、活性越强,硫化氢释放量就越大;中偏酸性污泥硫化氢的释放量大于碱性污泥,碱性污泥不仅能够中和硫化氢,而且可以抑制SRB的生长,减少因微生物作用而产生的硫化氢;污泥硫化氢释放量随干化温度的增高而增加,硫化氢的最大释放量发生在污泥干化的前期.上述研究结果为污泥干化过程中有效地控制硫化氢提供了科学依据.

• Abstract：Simulations were conducted on the release of hydrogen sulfide (H₂S) from different types of sludge during the low-temperature sludge drying process. The biomass and activity of sulfate-reducing bacteria (SRB) in various sludges and the corresponding H₂S release were studied by cultivating the bacteria. The results show that larger biomass and stronger SRB activity in sludge correspond to more H₂S release. Neutral to acidic sludges release more H₂S than alkaline sludges. The alkaline sludge not only neutralizes H₂S but also suppresses SRB growth,thus reducing the amount of H₂S produced by the microbes. During sludge drying,the amount of H₂S released increases with drying temperature. The maximal amount of H₂S release occurs in the early stage of sludge drying. The above findings provide a scientific basis for effective control of H₂S release in the sludge drying process.

• Key words：sludge  sulfate-reducing bacteria (SRB)  hydrogen sulfide (H₂S)  release

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