摘要
接种某城市污水处理厂的好氧颗粒污泥,采用较高的污泥负荷、高选择压和人工洗出絮状污泥的培养方式,促使好氧颗粒污泥直径迅速增长。考察了大直径好氧颗粒污泥的增长、破裂、稳定的变化过程。大直径好氧颗粒污泥最大直径可达9.6mm,最大沉淀速率为160m/h,污泥指数(SVI)在32～60mL/g左右。大直径颗粒污泥内部质地疏松有孔洞,外表层相对致密并由大量的丝状物质构成,且活性低于普通活性污泥。
The aerobic granules sludge with big diameter was cultivated with sewage sludge as seeding sludge and operated under the conditions of high organic load and selection pressure, after 25 d of cultivation, the flocs were washed manually for increasing the granule size. The process of granule growth, fragmentation and stabilization was observed, and the variation of their size, MLSS, SVI, settlement ratio, morphology and activity were all investigated. The granule cultivated for 33 d had the biggest size with diameter of 9.6 mm, settling ratio of 160 m/h and SVI ranged from 32 mL/g to 60 mL/g. The loose material and holes were found in the interior of granule; comparatively exterior structure was more compact and consists with filament matter adhered on the surface of the granule. The obtained granules presented lower activated than normal activated sludge.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2009年第9期15-18,22,共5页
Environmental Pollution & Control
基金
国家自然科学基金资助项目(No.5087195)
浙江省重点科技计划项目(No.2008C23G2020041)
关键词
好氧颗粒污泥
大直径
培养
破碎
特性
aerobic granules sludge
large diameter
cultivation
fragmentation
characteristics
