TY - JOUR
T1 - Enhancement of sludge reduction by ultrasonic pretreatment and packing carriers in the anaerobic side-stream reactor
T2 - Performance, sludge characteristics and microbial community structure
AU - Cheng, Cheng
AU - Zhou, Zhen
AU - Qiu, Zhan
AU - Yang, Jiyuan
AU - Wu, Wei
AU - Pang, Hongjian
N1 - Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2018/2
Y1 - 2018/2
N2 - Effects of ultrasonic pretreatment and packing carriers on sludge reduction, settleability, dewaterability and microbial community structure in the anaerobic side-stream reactor (ASSR) were investigated with three anaerobic reactors operated in parallel. Ultrasonication from 3.65% in the ASSR to 5.08%, and packing carriers further enhanced the efficiency to 19.2%. Ultrasonic pretreatment of sludge decreased oxidation–reduction potential in ASSR and enhanced the release of intracellular substances. The deterioration of sludge settleability and dewaterability in the ASSR after ultrasonic pretreatment was improved by packing carriers. Illumina-MiSeq sequencing showed that microbial richness and diversity increased after ultrasonic pretreatment and packing carriers in the ASSR. Packing carriers favored the growth of slow grower (Dechloromonas), fermentative bacteria (Draconibacteriaceae, Fusibacter, Acidaminobacter) and floc-forming bacteria (Zoogloea), while hydrolytic and predatory bacteria (Saprospiraceae_unculture) and slow grower (Thauera) was enriched in the ASSR.
AB - Effects of ultrasonic pretreatment and packing carriers on sludge reduction, settleability, dewaterability and microbial community structure in the anaerobic side-stream reactor (ASSR) were investigated with three anaerobic reactors operated in parallel. Ultrasonication from 3.65% in the ASSR to 5.08%, and packing carriers further enhanced the efficiency to 19.2%. Ultrasonic pretreatment of sludge decreased oxidation–reduction potential in ASSR and enhanced the release of intracellular substances. The deterioration of sludge settleability and dewaterability in the ASSR after ultrasonic pretreatment was improved by packing carriers. Illumina-MiSeq sequencing showed that microbial richness and diversity increased after ultrasonic pretreatment and packing carriers in the ASSR. Packing carriers favored the growth of slow grower (Dechloromonas), fermentative bacteria (Draconibacteriaceae, Fusibacter, Acidaminobacter) and floc-forming bacteria (Zoogloea), while hydrolytic and predatory bacteria (Saprospiraceae_unculture) and slow grower (Thauera) was enriched in the ASSR.
KW - Anaerobic side-stream reactor
KW - Carrier
KW - Dissolved organic matters
KW - Microbial community
KW - Sludge reduction
KW - Ultrasonic
UR - https://www.scopus.com/pages/publications/85031734091
U2 - 10.1016/j.biortech.2017.10.043
DO - 10.1016/j.biortech.2017.10.043
M3 - 文章
C2 - 29054059
AN - SCOPUS:85031734091
SN - 0960-8524
VL - 249
SP - 298
EP - 306
JO - Bioresource Technology
JF - Bioresource Technology
ER -
