化工学报2013，Vol.64Issue(4)：1431-1437,7.DOI:10.3969/j.issn.0438-1157.2013.04.042
NOx--N对初沉污泥厌氧发酵及反硝化性能的影响
Effect of NOx--N on primary sludge fermentation and denitrification
摘要
Abstract
In order to improve removal efficiency of nitrogen, to enhance nitrogen removal process for low C/N ratio wastewater, and to accomplish denitrification, primary sludge was used as carbon source and NO-x-N was added into primary fermentation system (PF) in this study. By investigating the variation of VFAs (volatile fatty acids) accumulation, NO-x-N removal amount and VSS (volatile suspended solids) reduction, the fermentation and denitrification capacity of 4 different electron acceptor systems were contrasted. The results showed that VFAs had little accumulated for sole NO-3-N and combined of NO-2-N and NO-3-N systems, while for sole NO-2-N and anaerobic systems VFAs showed great accumulation, indicating that the use of carbon source was better for NO-3 -N and combined system. The total amount of removing electron acceptor for sole NO-3 -N, combined NO-2 -N and NO-3 -N and sole NO-2 -N systems were 1692 mg · L-1 , 1330 mg · L-1, 1223 mg · L l, respectively. Clearly sole NO3 -N system had the best denitrification ability. Additionally, all these electron acceptor systems, with more than 60% VSS reduction, showed a great sludge reduction capacity, especially for NO-3-N system, which reached about 67.9%, even though little decreased compared to the anaerobic system. In summary, for primary fermentation and denitrification system, using NO-3-N as electron acceptor can achieve the best nitrogen removal efficiency and sludge reduction performance.关键词
初沉污泥/发酵/反硝化/污泥减量Key words
primary sludge/ fermentation/ denitrification/ sludge reduction分类
资源环境引用本文复制引用
李永波,王淑莹,袁泉,张良长,张宇坤,彭永臻..NOx--N对初沉污泥厌氧发酵及反硝化性能的影响[J].化工学报,2013,64(4):1431-1437,7.基金项目
国家自然科学基金项目(51178007) （51178007）
北京市教委科技创新平台项目. （）
