摘要
利用气提式内循环间歇反应器（SBAR）考察好氧硝化颗粒污泥搁置2个月后重新投入运行,其物理性状和微生物活性的恢复情况.结果表明,搁置后颗粒由棕黄色转为灰黑色,粒径及沉降速率无明显变化.颗粒重新投入反应器,2周后颜色基本恢复;污泥浓度、颗粒粒径以及沉降速率迅速增加;颗粒中异养菌活性在1 d内即可恢复至原水平的86%,COD去除活性5 d后完全恢复,去除率稳定在80%以上.活性恢复阶段采用较高的曝气量和较长的循环时间有利于硝化菌的活性恢复,第41 d曝气量由0.05 m^3.h^-1提高到0.10 m^3.h^-1后,亚硝酸菌和硝酸菌活性分别由原水平的88%和82%提高到122%和92%,氨氮去除率由之前的80%-90%迅速提高到96%以上;第65 d循环时间由4 h延长至6 h使硝酸菌的活性得到了完全恢复.
A sequencing batch airlift reactor （SBAR） was conducted to study the performance of physical characteristics and respirometric activities during reactivation of aerobic granules after a 2-month storage time. Results showed that the color of the aerobic granules had completely become dark, the size and settleability did hardly change during the storage period. The color turned to be brownish-yellowish when the reactor was restarted for 2 weeks. The MLSS, granule size, and settleability increased rapidly along with reactivation. The heterotrophic activity resumed 86% within 1 day and was fully reactivated after 5 days. Then the COD removal rate was stabilized above 80%. Higher aeration rate and longer cycle time facilitated the reactivation of nitrifiers. When aeration rate was increased from 0.05 m^3·h^-1 to 0.10 m^3·h^-1 at 41th day, activities of ammonia-oxidizing bacteria and nitrite-oxidizing bacteria were improved from 88 % and 82 % to 122 % and 92%, respectively. The removal rate of ammonium-nitrogen promptly reached above 96%. Nitrlte-oxidizing bacteria were fully reactivated after the cycle time was prolonged from 4 h to 6 h.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2008年第11期3119-3123,共5页
Environmental Science
基金
高等学校博士学科点专项科研基金项目(20030141022)
关键词
好氧硝化颗粒污泥
活性恢复
比耗氧速率
曝气量
循环时间
序批式反应器
aerobic nitrifying granules
reactivation
specific oxygen utilization rates （SOUR）
aeration rate
cycle time
sequencing batch reactor （SBR）
