摘要
研究了不同含盐量(以NaCl质量分数计)对好氧颗粒污泥稳定性及微生物组成的影响。扫描电镜观察发现,高含盐量(5.0%)与低含盐量(1.0%和2.5%)下好氧颗粒污泥微生物的组成有较大的差异。低含盐量下好氧颗粒污泥的微生物以细菌(杆菌和球菌)为主;高含盐量下易出现大量的丝状菌,并形成白色和黑色的丝状颗粒污泥,而且丝状颗粒污泥在短期内(1个月左右)仍具有较好的沉降性能和密实性。但这些丝状颗粒污泥在实验后期易变得大而疏松,最终导致反应器运行失败。因此,维持丝状颗粒污泥的密实成长并抑制其发散成长成为控制好氧颗粒污泥稳定运行的关键,尚需进一步研究。
We have studied the effect of salinity on the stability of aerobic granular sludge and its microbial composition. The microbial composition of granules under high salinity （5.0%） and low salinity （1.0% and 2.5%） varied greatly. SEM observation showed that the microorganisms were mainly rod-shaped and coccus-shaped bacteria under low salinity. But a large portion of filamentous bacteria appeared under high salinity,and formed white and black filamentous granules, which for a short time displayed good settleability and strength. However, these filamentous granules later became larger and looser, and finally disintegrated in the reactor. It appeared that the proliferation of filamentous bacteria was a main factor affecting the stability of aerobic granular sludge.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2008年第10期8-10,15,共4页
Environmental Pollution & Control
基金
国家自然科学基金资助项目(No.50708089、No.50621140001)
国家高技术研究发展计划资助项目(No.2006AA06Z328)
关键词
好氧颗粒污泥
含盐量
丝状菌
稳定性
aerobic granular sludge
salinity
filamentous bacteria
stability
