| 石田螺处理城市剩余污泥试验 |
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| 引用本文： | 梁敏,陶虎春,倪晋仁,刘耀成,李伟,吴应超.石田螺处理城市剩余污泥试验[J].环境科学研究,2010,23(9):1180-1184. |
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| 作者姓名： | 梁敏 陶虎春 倪晋仁 刘耀成 李伟 吴应超 |
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| 作者单位： | 1.北京大学深圳研究生院环境与能源学院, 城市人居环境科学与技术重点实验室, 广东 深圳 518055;北京大学环境工程系, 水沙科学教育部重点实验室, 北京 100871 |
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| 基金项目： | 北京大学深圳研究生院院长科研基金项目 |
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| 摘 要： | 应用石田螺（Sinotaia quadrata）摄食和消化城市剩余污泥，通过考察石田螺的最佳养殖密度、城市剩余污泥经石田螺处理前后性质的变化和重金属转移规律，对石田螺处理城市剩余污泥的可行性进行了研究. 结果表明:石田螺在养殖密度为13～15 kg/m3时存活率较高；石田螺可将城市剩余污泥直接转化为颗粒螺粪，可有效去除污泥中的有机物，对VS和TOC去除率分别达到23%和37%. 对城市剩余污泥经石田螺处理后得到的螺粪进行厌氧发酵产气试验，12 d后的总产气量仅为0.5 mL，可见螺粪的厌氧消化活性较低，这可在一定程度上避免污泥腐化发臭. 石田螺对城市剩余污泥中Cr，Cu，Zn，Pb和Cd 5种重金属的富集系数（BCF）分别为1.09，1.36，1.17，1.33和3.41；石田螺对Ni无富集作用. 城市剩余污泥处理后得到的螺粪重金属质量分数符合国家《农用污泥中污染物控制标准》（GB4284—84），在其他污染物项目达标的前提下，可用作为城市绿化用肥或土壤改良剂等，实现污泥的资源化利用.
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| 关 键 词： | 城市剩余污泥 石田螺 稳定化 重金属 生物肥料 |
| 收稿时间： | 2010/3/29 0:00:00 |
| 修稿时间： | 2010/5/20 0:00:00 |
Treatment of Municipal Excess Sludge by Sinotaia quadrata |
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| LIANG Min,TAO Hu chun,NI Jin ren,LIU Yao cheng,LI Wei and WU Ying chao.Treatment of Municipal Excess Sludge by Sinotaia quadrata[J].Research of Environmental Sciences,2010,23(9):1180-1184. |
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| Authors: | LIANG Min TAO Hu chun NI Jin ren LIU Yao cheng LI Wei and WU Ying chao |
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| Institution: | Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China;Key Laboratory of Water and Sediment Sciences, Ministry of Education, Department of Environmental Engineering, Peking University, Beijing 100871, China;Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China;Key Laboratory of Water and Sediment Sciences, Ministry of Education, Department of Environmental Engineering, Peking University, Beijing 100871, China;Key Laboratory of Water and Sediment Sciences, Ministry of Education, Department of Environmental Engineering, Peking University, Beijing 100871, China;Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China;Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China;Key Laboratory of Water and Sediment Sciences, Ministry of Education, Department of Environmental Engineering, Peking University, Beijing 100871, China;Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China;Key Laboratory of Water and Sediment Sciences, Ministry of Education, Department of Environmental Engineering, Peking University, Beijing 100871, China |
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| Abstract: | The feasibility of treatment of municipal excess sludge was studied based on research on the ingestion and digestion of sludge by Sinotaia quadrata. Appropriated stocking density of Sinotaia quadrata, the change of the sludge properties before and after treatment by Sinotaia quadrata, and the heavy metal transfer law were investigated. The results showed that the best survival rate of Sinotaia quadrata was obtained at stocking density of 13-15 kg/m3; the municipal excess sludge could be transformed into granular manure; the organic matter in the sludge was removed effectively; and, VS and TOC removal efficiencies could reach 23% and 37% respectively. The anaerobic biogasification performance of the granular manure from the municipal excess sludge was investigated. Total biogas yield of 0.5 mL was obtained within 12 d, which indicated that the low activity of anaerobic digestion for granular manure could avoid the corruption of the sludge. The bio-concentration factors （BCF） of heavy metals for Sinotaia quadrata including Cr, Cu, Zn, Pb and Cd were 1.09, 1.36, 1.17, 1.33 and 3.41, respectively; no enrichment was detected for Ni. The contents of heavy metals in the granular manure met the control standards for agricultural use according to “Control standards for pollutants in sludge from agricultural use” （GB4284-84）. If the granular manure from the municipal sludge could meet the control standards for other pollutants, it could be used as urban green fertilizer or soil conditioner to realize resource utilization of the sludge. |
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| Keywords: | municipal excess sludge Sinotaia quadrata stabilization heavy metals biofertilizer |
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