基于分区曝气工艺的单户型一体化乡村污水处理设备的性能评估
Performance evaluation of a home-type compact clean-tank with partitioning aeration technology for rural wastewater treatment
-
摘要: 针对我国国情,应用分区曝气的原理开发了一款适用于乡村污水治理的单户型一体化污水处理设备。以常熟市某生活污水处理厂旋流沉砂池的进水为处理对象,对该设备的性能进行研究。结果表明,设备在水力停留时间(HRT)为10 h、曝气量为1.2 m3·h-1、回流比为1∶1时达到最佳工况点,出水COD、NH+4-N及SS达到1级A标准,TN达到1级B标准(GB 18918-2002)。研究发现,非曝气Ⅰ区内的填充介质有助于形成反应器内部的厌氧微环境,从而可以抑制回流液中的溶解氧对该区反硝化反应的不利影响。设备停运后的恢复能力与停运时间及环境温度等因素有关,而分区曝气工艺与固定床技术在设备停运恢复能力较弱时对出水水质有一定的缓冲作用。Abstract: A home-type compact clean-tank for domestic wastewater treatment was designed especially for a typical Chinese rural family usually with less capita and less water-consumption than those of western countries. Its performance was studied with influent from the rotational flow grit chamber of a municipal wastewater treatment plant in Changshu, China. The results showed that the best operation happened in the condition with HRT of 10 h, aeration rate of 1.2 m3·h-1 and reflux ratio of 1∶1, and the designation may have the effluent COD, NH+4-N and SS meet the requirement of the national standard 1A and the effluent TN meet the national standard 1B (GB 18918-2002). It is concluded that to pack filtration media in the non-aeration zone Ⅰ may help form anaerobic micro-environment for denitrification, partially offsetting the impact of the DO in reflux liquid. Restorability of the running after suspension was affected by the length of time-out and the temperature. However, the partition aeration and the fixed bed had buffering effect on effluent quality when in low restorability.
-
[1] 梁建军, 刘明祥, 何强,等.两段折流斜板污水预处理一体化设备的净化效能[J].中国给水排水,2012,8(17):17-20 [2] 范彬, 胡明, 顾俊,等.不同农村污水收集处理方式的经济性比较[J].中国给水排水, 2015,1(14):20-25 [3] 范彬, 武洁玮, 刘超,等.美国和日本乡村污水治理的组织管理与启示[J].中国给水排水,2009,5(10):6-10 [4] 许春莲, 宋乾武, 王文君,等.日本净化槽技术管理体系经验及启示[J].中国给水排水,2008,4(14):1-4 [5] 侯京卫, 范彬, 曲波,等.农村生活污水排放特征研究述评[J].安徽农业科学,2012,0(2):964-967 [6] 袁晓燕, 余志敏, 施卫明.大清河流域典型村镇生活污水排放规律和污染负荷研究[J].农业环境科学学报,2010,9(8):1547-1557 [7] 国家环境保护总局.水和废水监测分析方法[M].4版.北京:中国环境科学出版社, 2002 [8] 杨旭楠, 林兴锐, 符诗雨, 等.感潮河流沉积物中溶解氧对硝化细菌垂向分布的影响[J].中山大学学报(自然科学版),2013,2(5):91-96 [9] GOGINA E, GULSHIN I.Simultaneous nitrification and denitrification with low dissolved oxygen level and C/N ratio[J].Procedia Engineering,2016,3:189-194 [10] 荣宏伟, 张朝升, 彭永臻, 等.DO 对 SBBR 工艺同步硝化反硝化的影响研究[J].环境科学与技术,2009,2(8):16-19 [11] 杨运平.活性污泥-接触氧化气提式内循环一体化反应器处理生活污水实验研究[D].重庆:重庆大学, 2007 [12] 李志华, 刘毅, 张芹,等.活性污泥胞外聚合物在污水处理过程中的荧光特性[J].环境工程学报,2015,9(7):3172-3176 [13] LI H, HUANG S, ZHOU S, et al.Study of extracellular polymeric substances in the biofilms of a suspended biofilter for nitric oxide removal[J].Applied Microbiology and Biotechnology,2016,0(22):9733-9743 [14] WANG P, YU Z, QI R, et al.Detailed comparison of bacterial communities during seasonal sludge bulking in a municipal wastewater treatment plant[J].Water Research,2016,5:157-166 [15] LI X, LIU X, WU S, et al.Microbial diversity and community distribution in different functional zones of continuous aerobic-anaerobic coupled process for sludge in situ reduction[J].Chemical Engineering Journal,2014,7:74-81
计量
- 文章访问数: 2425
- HTML全文浏览数: 2034
- PDF下载数: 466
- 施引文献: 0