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应用生态学报 ›› 2002, Vol. ›› Issue (4): 467-470.

• 研究论文 • 上一篇    下一篇

城市污泥强制通风堆肥过程中的生物学和化学变化特征

张雪英1, 周立祥1, 沈其荣1, 宗良纲1, 占新华1, 吴启堂2, 廖辛悌2, 黄焕忠3   

  1. 1. 南京农业大学资源环境学院, 南京 210095;
    2. 华南农业大学国土资源学院, 广州 510064;
    3. 香港浸会大学生物系, 香港九龙塘
  • 收稿日期:2000-07-31 修回日期:2000-10-18 出版日期:2002-04-15
  • 通讯作者: 周立祥,E-mail:lxzhou@njau.edu.cn.
  • 基金资助:
    美国勒克菲洛兄弟基金会项目(RBF/1998);国家自然科学基金重点项目(39830220);江苏省社会发展资助项目(2000009).

Changes of chemical and biological properties during composting sewage sludge by using forced aerated static pile model

ZHANG Xueyin1, ZHOU Lixiang1, SHEN Qirong1, ZONG Lianggang1, ZHAN Xinhua1, WU Qitang2, LIAO Xinti2, W. C. Wong3   

  1. 1. College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095;
    2. College of Soil and Resources, South China Agricult Uiversity, Guangzhou 510064;
    3. Department of Biology, Hong Kong Baptist Uiversity, Hong Kong
  • Received:2000-07-31 Revised:2000-10-18 Online:2002-04-15

摘要: 采用间竭式强制通风堆肥法进行的肥堆体积约4m3,堆肥时间为53d的污泥堆肥试验表明,堆肥的第2天即达高温阶段(≥55℃)并能保持8d,平均最高温度达68℃,局部温度达74℃.粪大肠杆菌由开始时的1.41×105个·g-1降至试验结束时的2.32×101个·g-1.污泥堆肥过程中挥发性固体,总有机C、水溶性有机C、固体有机C/N比和水溶性有机C/有机N比下降明显,而N、P及重金属含量有所升高.随着堆肥的进程,在前1周堆肥过程中产生的氨氮大幅下降,硝酸盐含量随之升高.相应地,pH在第1周内升高,随后降低.堆肥40d左右,水芹(Lepidium sativum L.)种子发芽指数即可达80%.综合堆肥过程中堆温和化学与生物学变化特点,表明污泥堆肥在40d左右基本上接近腐熟,50d后达到完全腐熟.产品外观呈黑褐色,蓬松,无明显异味.

Abstract: Municipal sewage sludge was composted for 53 days with Chinese medical herb residues as bulking agent through forced aerated static pile model. The temperature of the pile could quickly rise to more than55℃ after the second day after composting. Furthermore, the temperature of more than 55℃ maintained as long as 8 days, which was helpful in inactivation of pathogens in compost. The cress seed germination index (GI) and the ratio of wa-ter-soluble organic carbon to organic nitrogen (soluble C/N-organic), used as indicators of phytotoxicity and maturation of compost, exhibited that the sludge compost was almost stabilized and matured near the 40th day of composting, when 80% of GI and 6.4 of soluble C/N-organic were obtained. The content of total N, P, Cu, Zn and Cd in compost increased as the composting time elapsed, while volatile solids, solid and water soluble organic carbons, pH, and NH4+-Ndecreased. F. coli, as a common indicator of pathogens in sludge, was reduced greatly from 1.41×105 to 2.32×101 in the final examination of the compost.

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