摘要
采用预挂好氧膜＋低负荷适应性培养的方式，在温度为12．3～18．5℃的条件下对O／A生物砂滤池进行挂膜启动。启动共耗时35d，其中预挂好氧膜14d、低负荷适应性培养21d，低负荷适应性培养阶段又以微生物增长率划分为3个阶段：缓速增长期、快速增长期、稳定发展期。通过研究低负荷适应性培养阶段气水比及反冲洗对污染物去除效果的影响发现，较低的气水比可强化缓速增长期的挂膜速度，而较高的气水比则可对快速增长期及稳定发展期的挂膜速度有所强化；反冲洗会短期影响生物膜活性，但7h后活性即可基本恢复，无长期不利影响。
The biofilm formation and start-up of the O/A biological sand filter were performed by forming biofilm under aeration and cultivating it under low loads at 12.3 to 18.5 ℃. The start-up took 35 d, with formation taking 14 d and cultivation lasting for 21 d. The cultivation step was divided into three stages aceording to mierobial growth： slow growth, rapid growth, and stable development. The effects of altering the air-water ratio and baekwashing on the removal of pollutants during cultivation were investiga- ted. A low air-water ratio enhanced the speed of biofilm formation in the slow growth stage, while a high air-water ratio enhaneed the speed of formation in the rapid growth and stable development stages. Back- washing affected biofilm activity in a short period, and the activity could be recovered after 7 h without long-term adverse effects.
出处
《中国给水排水》
CAS
CSCD
北大核心
2013年第23期139-142,共4页
China Water & Wastewater
基金
中韩国际合作项目
河北省重大科技攻关项目(07276713D)
中原工学院青年骨干教师资助项目
关键词
O
A生物砂滤池
挂膜启动
预挂好氧膜
低负荷适应性培养
O/A biological sand filter
biofilm formation and start-up
biofilm formation under aeration
biofilm cultivation under low load
