摘要
采用自行设计的生物脱臭塔对污水处理厂的臭气进行净化，探讨了接种活性污泥对提高脱臭效率的作用，并分析了外源条件和运行工况对脱臭效率的影响。结果表明，当臭气停留时间为60s时对其净化效果比较理想，其中接种了活性污泥的1^#塔对NH，和H2S的去除率分别为89％和90％，而用作对比的2^#塔对NH3和H2S的去除率分别为81％和79％，表明接种活性污泥能够促进对臭气的净化；臭气停留时间为60s时最经济合理；脱臭循环液的最佳停留时间为3．5～4h；降解NH3的最适宜pH值为5～7，降解H2S的最佳pH值为3～5；另外，因为进气中的NO2浓度过低，两个脱臭塔对其净化率仅分别为68％和38％，说明系统对特低浓度臭气的去除效果有待进一步提高。
The self-designed biological deodorization towers were used to purify odorous gases from a wastewater treatment plant. The effect of inoculated activated sludge on improvement of deodorization efficiency was introduced. The influence of external conditions and operation mode on deodorization efficiency was analyzed . The result shows that when the retention time of odorous gases is 60 s, the purification effect is relatively ideal. The removal rates of NH3 and H2S by No. 1 tower with inoculated activated sludge reach 89% and 90% respectively, and those of No. 2 tower without inoculated activated sludge are 81% and 79%, which shows that the inoculated activated sludge can promote the purification of the odorous gase. The 60 s retention time of odorous gases is the most economic and reasonable. The optimal retention time of the circulating liquor is 3.5 to 4 h. The optimal pH is 5 to 7 for NH3, and 3 to 5 for H2S. The result also shows that only 68% and 38% NO2 are removed by the both towers due to too low concentration of NO2 in inlet gases, which means that the removal effect of too low-concentration odorous gases remains to be further improved.
出处
《中国给水排水》
CAS
CSCD
北大核心
2007年第13期11-14,19,共5页
China Water & Wastewater
基金
上海市科委重大科技攻关项目(02DZ12105)
关键词
生物脱臭
污水处理厂
氨
硫化氢
循环水量
臭气停留时间
PH
biological deodorization
wastewater treatment plant
NH3
H2S
circulation flow rate
retention time of odorous gases
pH
