PMID- 26868150
OWN - NLM
STAT- MEDLINE
DCOM- 20161031
LR  - 20181202
IS  - 1873-2976 (Electronic)
IS  - 0960-8524 (Linking)
VI  - 207
DP  - 2016 May
TI  - The shift of the microbial community in activated sludge with calcium treatment 
      and its implication to sludge settleability.
PG  - 11-8
LID - S0960-8524(16)30111-0 [pii]
LID - 10.1016/j.biortech.2016.01.135 [doi]
AB  - The sludge settleability is of prime importance for the activated sludge process. 
      The effect of calcium ion on the biological performance of sludge was 
      investigated in a lab-scale activated sludge system with varying Ca(2+) 
      concentration. Results indicated that addition of 150mg/L Ca(2+) to the influent 
      significantly improved the settling characteristics and metabolic reactivity of 
      activated sludge in the bioreactors. Analyses using denaturing gradient gel 
      electrophoresis (DGGE) and 16S rRNA sequencing showed that a significant 
      difference in the presence of certain bacterial groups between the sludge systems 
      with 150mg/L Ca(2+) and those with 0-100mg/L Ca(2+) addition. Ca(2+) also 
      increased the production of the extracellular polymeric substance (EPS) and 
      facilitated the development of microbial cluster in the bioreactor. Study showed 
      that an addition of 150mg/L Ca(2+) to the influent provides a simple approach to 
      improve the settling properties of activated sludge and maintain high pollutant 
      removal efficiency.
CI  - Copyright (c) 2016 Elsevier Ltd. All rights reserved.
FAU - Ye, Chengchen
AU  - Ye C
AD  - Jiangsu Key Laboratory for Organic Waste Utilization, Jiangsu Collaborative 
      Innovation Center for Solid Organic Waste Resource Utilization, College of 
      Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 
      210095, China.
FAU - Yang, Xinping
AU  - Yang X
AD  - Jiangsu Key Laboratory for Organic Waste Utilization, Jiangsu Collaborative 
      Innovation Center for Solid Organic Waste Resource Utilization, College of 
      Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 
      210095, China. Electronic address: xpyang@njau.edu.cn.
FAU - Zhao, Fang-Jie
AU  - Zhao FJ
AD  - Jiangsu Key Laboratory for Organic Waste Utilization, Jiangsu Collaborative 
      Innovation Center for Solid Organic Waste Resource Utilization, College of 
      Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 
      210095, China; Rothamsted Research, Harpenden, Hertfordshire AL5 2JQ, UK.
FAU - Ren, Lifei
AU  - Ren L
AD  - Jiangsu Key Laboratory for Organic Waste Utilization, Jiangsu Collaborative 
      Innovation Center for Solid Organic Waste Resource Utilization, College of 
      Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 
      210095, China.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20160208
PL  - England
TA  - Bioresour Technol
JT  - Bioresource technology
JID - 9889523
RN  - 0 (Polysaccharides, Bacterial)
RN  - 0 (RNA, Ribosomal, 16S)
RN  - 0 (Sewage)
RN  - S88TT14065 (Oxygen)
RN  - SY7Q814VUP (Calcium)
SB  - IM
MH  - Bacteria/*drug effects/genetics
MH  - Bioreactors/microbiology
MH  - Calcium/*pharmacology
MH  - Cluster Analysis
MH  - Denaturing Gradient Gel Electrophoresis
MH  - Hydrogen-Ion Concentration
MH  - Oxygen/analysis
MH  - Phylogeny
MH  - Polysaccharides, Bacterial/metabolism
MH  - RNA, Ribosomal, 16S/genetics
MH  - Sewage/*microbiology
OTO - NOTNLM
OT  - Activated sludge
OT  - Ca(2+)
OT  - EPS
OT  - Microbial community
OT  - Settleability
EDAT- 2016/02/13 06:00
MHDA- 2016/11/01 06:00
CRDT- 2016/02/13 06:00
PHST- 2015/12/11 00:00 [received]
PHST- 2016/01/27 00:00 [revised]
PHST- 2016/01/31 00:00 [accepted]
PHST- 2016/02/13 06:00 [entrez]
PHST- 2016/02/13 06:00 [pubmed]
PHST- 2016/11/01 06:00 [medline]
AID - S0960-8524(16)30111-0 [pii]
AID - 10.1016/j.biortech.2016.01.135 [doi]
PST - ppublish
SO  - Bioresour Technol. 2016 May;207:11-8. doi: 10.1016/j.biortech.2016.01.135. Epub 
      2016 Feb 8.