RESEARCH OF CLOGGING MECHANISM AND PICKLING EFFECT ON CORUNDUM AERATOR IN A WASTEWATER TREATMENT PLANT
-
摘要: 以无锡市某污水处理厂刚玉曝气器为研究对象,论述了刚玉曝气器堵塞原因及堵塞特征,同时对刚玉曝气器进行酸洗实验,以保证污水处理厂曝气系统稳定运行。结果表明:新旧曝气头混合使用的曝气系统有效运行时间仅为160 d,远低于全新曝气头的曝气系统(840 d),表明运行中的曝气系统曝气头容易堵塞,需及时清洗维护。微生物对刚玉曝气器的堵塞程度基本没有影响,但对判断刚玉曝气器的堵塞状态具有指示作用。刚玉曝气器堵塞程度与有机物、无机物的含量相关,且与总铁含量呈现正相关。酸清洗对恢复刚玉曝气器性能具有较好的提升效果,15% HCl溶液酸洗20 min能使刚玉曝气头氧传质系数由刮泥后的0.5 min-1左右恢复到0.7 min-1左右,接近于全新曝气头氧传质系数,清洗效果良好。Abstract: The reasons and characteristics of clogging corundum aerators from a waste water treatment plant were investigated, and the components of acid pickling from corundum aerators were studied. It was of great significance to the stable operation of the aeration system in the sewage treatment plant. The results showed that the effective operation time of the new and old aerator was only 160 days, far lower than 840 days of the new aerator. It showed that the aerator was easy to block and needed to be cleaned and maintained in time. Microorganism had little effect on the clogging of corundum aerators, but an indicator effect on judging the blockage state of the corundum aerator. The corundum aerator blockage was related to the content of organic and inorganic matters, and had a positive correlation with the total iron content. Acid cleaning could improve the performance of corundum aerator. Pickling with 15% hydrochloric acid solution for 20 minutes could restore the oxygen mass transfer coefficient of corundum aeration head from about 0.5 min-1 to about 0.7 min-1 after scraping mud, which was close to the oxygen mass transfer coefficient of the new aeration head and indicated good pickling performance.
-
Key words:
- corundum aerator /
- clogging /
- total iron /
- acid pickling /
- oxygen mass transfer coefficient
-
张永健,邢旭.传统活性污泥法与吸附-再生活性污泥法的比较[J].环境保护与循环经济,2008,74(8):22-24. 庄健,王洪臣,刘国华,等.曝气密度对曝气系统充氧性能的影响研究[J].环境污染与防治,2014,36(7):50-54. REARDON D J. Turning down the power[J].Civ Eng,1995,65(8):54-56. 梁远,王佳伟,李洁,等.微孔曝气器充氧性能变化对污水处理厂能耗的影响[J].中国给水排水,2011,37(1):42-45. 刘仕鳌,郝超磊,刘树兰,等.几种曝气器应用性能比较与分析[J].油气田环境保护,2012,22(6):21-23. 刘司琪,王锡昌,王传现,等. 基于红外光谱的葡萄酒关键质量属性快速分析评价研究进展[J]. 食品科学,2017,38(19):268-277. LIU Y J, LIU Z, ZHANG A N, et al. The role of EPS concentration on membrane fouling control:comparison analysis of hybrid membrane bioreactor and conventional membrane bioreactor[J]. Desalination,2012,305(5):38-43. LWEIS W K,WHITMAN W C. Principles of gas absorption[J]. Industrial and Engineering Chemistry,1924,16(12):1215-1220. 刘立云.西安某污水处理厂曝气系统改造研究[J].安徽建筑,2012,19(2):175-176. 孔秀琴,兰建伟,何乐萍.活性污泥培养及运行过程中的微生物指示作用[J].郑州大学学报(工学版),2006,27(1):113-116. 李苗. 高级氧化技术对三种典型染料降解过程研究[D].绵阳:西南科技大学,2018. 冯祥军.浅谈刚玉微孔曝气器在污水处理厂的应用[J].给水排水,2014,50(增刊1):348-350. 张庆阳. 普通碳钢酸洗抑雾剂的研究[D].沈阳:东北大学,2010. HU P,LIU L H,WU L X.Current research progress and trend on fineporeaeration[J].Environment Engineering,2015,33(2):58-61. 魏延苓,齐鲁,刘国华,等.微孔曝气器充氧性能的影响因素[J].水处理技术,2014,40(2):1-7. 薛媛媚,王斌,朱景刚,等. 微孔曝气器的清洗方案改进及实施效果[J].中国给水排水,2011,27(10):98-100. 冯祥军.深圳市福永污水处理厂刚玉微孔曝气器酸洗的尝试[J].环境工程,2015,33(增刊1):280-281,301.
点击查看大图
计量
- 文章访问数: 335
- HTML全文浏览量: 10
- PDF下载量: 3
- 被引次数: 0