城镇净化沼气池处理生活污水效果评价

Evaluation on Daily Life Sewage Treatment Effect by Municipal Biogas Digester

本研究目的是了解近几年城镇净化沼气池出水达标情况 ,为完善城镇净化沼气池管理提供依据。方法 :连续 3年对城镇净化沼气池出水 ,按DB5 1/136- 92地方标准检测各项指标 ,收集数据。结果 :NH3 N ,SS ,pH ,寄生虫卵数达标率 (一级标准 )均在 86.4 %以上。COD(库仑法 )、BOD5、粪大肠菌值达标率在 77.3%～ 4 0 .9% ,色度、臭达标率在 5 5 %以下。宿舍楼 (合流式或分流式 )、办公楼 (水冲式 )两种生活污水净化沼气池卫生处理效果差异无显著性。春夏、秋冬两类季节净化沼气池处理卫生效果差异无显著性。结论 :净化沼气池处理生活污水效果肯定 ,但一些指标达标率偏低 ,沼气建设和管理部门应积极采取改进措施 。

Objective:?To investigate the daily life sewage treatment effect by municipal biogas digester system in recent years so as to provide the scientific basis for perfecting the management of municipal biogas system. Method: The samples collected from the outlet of 88 municipal biogas system were examined in successive 3 years according to the methods in 'DB51/136-92 Standard'. Results: Over 86.4% samples achieved the discharge standard (Grade I standard) in items of NH 3-N, SS, pH and parasite eggs, while 77.3%～40.9% samples achieved the standard in COD, BOD 5 and colititre, however, only <55% samples achieved the standard in degree of color and odor. There were no significant differences in sewage treatment effect between dormitory building system and office building system biogas system as well as between samples collected in spring, summer seasons and collected in autumn, winter seasons.Conclusion: The examination results showed that the sewage treatment effect of municipal biogas system were definite but the rate of achieving the discharge standard in some indices seemed to be quite low. In order to ensure better effect, the improvement measures should be strengthened in system construction and management.