| 餐厨垃圾厌氧消化水解机理及动力学模型研究 |
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| 引用本文： | 吴云,张代钧,杨钢.餐厨垃圾厌氧消化水解机理及动力学模型研究[J].环境科学学报,2010,30(1):142-147. |
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| 作者姓名： | 吴云 张代钧 杨钢 |
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| 作者单位： | 1. 重庆大学资源及环境科学学院,重庆,400044
2. 重庆教育学院地理系,重庆,400067 |
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| 基金项目： | 江苏省农产品质量安全产地适宜性评价研究与应用重大项目;;国家科技支撑计划项目(No.2006BAD02A03)~~ |
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| 摘 要： | 对餐厨垃圾厌氧消化水解产物溶出规律进行了研究,证实扩散限制作用是导致水解速率出现滞后现象的主要原因.在考虑扩散作用影响的前提下,对餐厨垃圾水解机理作了必要补充阐述,并根据补充后的水解机理建立了餐厨垃圾水解分段动力学模型,并在模型中引入了扩散阻力系数.通过试验求得不同粒径(20mm、40mm、60mm)餐厨垃圾的扩散阻力系数分别为1.42、2.12、2.78.进一步分析表明,扩散阻力系数的变化基本符合指数函数规律,可将分段模型合并为统一的经验动力学模型.模型验证结果表明,预测值与实验值较为接近,能够描述餐厨垃圾的水解过程.
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| 关 键 词： | 石化园区 土壤重金属 评价 |
| 收稿时间： | 4/10/2009 9:50:52 AM |
| 修稿时间： | 6/6/2009 9:08:25 AM |
The mechanism and kinetics of hydrolysis in the anaerobic digestion of kitchen wastes |
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| WU Yun,ZHANG Daijun and YANG Gang.The mechanism and kinetics of hydrolysis in the anaerobic digestion of kitchen wastes[J].Acta Scientiae Circumstantiae,2010,30(1):142-147. |
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| Authors: | WU Yun ZHANG Daijun and YANG Gang |
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| Institution: | ZHAO Xiufeng,WANG Qiangsheng,SHI Ningning,DING YanfengKey Laboratory of Crop Physiology & Ecology in Southern China,Ministry of Agriculture,Nanjing Agricultural University,Nanjing 210095 |
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| Abstract: | A total of 200 topsoil samples were collected by a GPS-based radial design over an area of 300 km2 in the vicinity of a chemical industrial park. According to the Standard of Soil Environment Quality (GB15618-1995) and the background values of the soil environment in this region,heavy metal pollution by Cd,Cr,Cu,Ni,Pb,Zn,Hg and As in the soils sampled was analyzed. Results of statistical analysis indicated that the mean concentrations of heavy metals Cd,Hg,Cu and Pb exceeded their natural background values.... |
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| Keywords: | petrochemical industry park soil heavy metals assessment |
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