FL
F. LIU
2 records found
1
Master thesis
(2021)
-
F.
LIU
(author),
JP
van der Hoek
(mentor),
JP
Hoek
(mentor),
JP
Van Der Hoek
(mentor),
JP
Peter van der Hoek
(mentor),
JP
der Hoek
(mentor),
Jan Peter
van der Hoek
(mentor),
Jan Peter
Hoek
(mentor),
Jan Peter
Van Der Hoek
(mentor),
Jan Peter
Peter van der Hoek
(mentor),
Jan Peter
der Hoek
(mentor),
J.P.
van der Hoek
(mentor),
J.P.
Hoek
(mentor),
J.P.
Van Der Hoek
(mentor),
J.P.
Peter van der Hoek
(mentor),
J.P.
der Hoek
(mentor),
Jan Peter van
van der Hoek
(mentor),
Jan Peter van
Hoek
(mentor),
Jan Peter van
Van Der Hoek
(mentor),
Jan Peter van
Peter van der Hoek
(mentor),
Jan Peter van
der Hoek
(mentor),
Jan
van der Hoek
(mentor),
Jan
Hoek
(mentor),
Jan
Van Der Hoek
(mentor),
Jan
Peter van der Hoek
(mentor),
Jan
der Hoek
(mentor),
J. P.
van der Hoek
(mentor),
J. P.
Hoek
(mentor),
J. P.
Van Der Hoek
(mentor),
J. P.
Peter van der Hoek
(mentor),
J. P.
der Hoek
(mentor),
Jan Peter van der
van der Hoek
(mentor),
Jan Peter van der
Hoek
(mentor),
Jan Peter van der
Van Der Hoek
(mentor),
Jan Peter van der
Peter van der Hoek
(mentor),
Jan Peter van der
der Hoek
(mentor),
Jan Peter
van der Hoek
(mentor),
Jan Peter
Hoek
(mentor),
Jan Peter
Van Der Hoek
(mentor),
Jan Peter
Peter van der Hoek
(mentor),
Jan Peter
der Hoek
(mentor),
D
Van Halem
(mentor),
D
van Halem
(mentor),
D.
Van Halem
(mentor),
D.
van Halem
(mentor),
Doris
Van Halem
(mentor),
Doris
van Halem
(mentor),
S.A.
Trikannad
(mentor),
Shreya Ajith
Trikannad
(mentor),
T.A.
Bogaard
(graduation committee member),
TA
Bogaard
(graduation committee member),
Thom
Bogaard
(graduation committee member),
Thom A.
Bogaard
(graduation committee member),
T. A.
Bogaard
(graduation committee member)
Though slow sand filtration is one of the oldest and effective means of drinking water treatment, the mechanisms contributing to bacteria and viruses removal are not well understood. The lack of understanding of actual removal potential and different mechanisms occurring in the f
...
Though slow sand filtration is one of the oldest and effective means of drinking water treatment, the mechanisms contributing to bacteria and viruses removal are not well understood. The lack of understanding of actual removal potential and different mechanisms occurring in the filter bed has limited the development of new filter design and operation. This research aims at assessing the bacteria and viruses removal capability of filter material in different depths from the top 40 cm of full-scale slow sand filter (SSF) operated for 436 days. In addition, the focus is to identify the key removal mechanisms that aid bacteria and viruses removal in the schmutzdecke.
The results show that three depths: 0-5, 5-20 and 20-35 cm contribute to E. coli removal of 0.55, 1.3 and 1.04 logs, PhiX174 removal of 0, 0.30 and 0.14 logs. The log reduction value of E. coli and PhiX174 is rather similar in different layers, even though the schmutzdecke is considered to be the critical component for E. coli removal. It indicated that the deeper layers are also important in a well-established SSF. No removal of PhiX174 was observed in 0-5 cm with a thick biofilm, which indicates that the thickness of a certain level would impact the performance of virus removal.
To determine mechanisms, filter material from 0-5 cm was operated under three conditions: active, inactive, and ignited condition. The results show E. coli removal of 0.68, 0.74, and 0.43 logs, PhiX174 removal of 0, 0, and 0.28 logs for active, inhibited, and ignited sand, respectively. Contrary to previous studies, no function of microbial mechanisms is observed for E. coli removal. That key mechanism might change with the different maturity levels of SSFs might be a possible reason. In addition, this may ascribe to incomplete microbial active inhibition. On the other hand, despite evidence that virus removal enhances with filter maturation, schmutzdecke did not improve PhiX174 removal. Poor virus removal may be attributed to higher interstitial velocity along with higher shearing forces caused by abundant biofilm within the schmutzdecke.
The results show that three depths: 0-5, 5-20 and 20-35 cm contribute to E. coli removal of 0.55, 1.3 and 1.04 logs, PhiX174 removal of 0, 0.30 and 0.14 logs. The log reduction value of E. coli and PhiX174 is rather similar in different layers, even though the schmutzdecke is considered to be the critical component for E. coli removal. It indicated that the deeper layers are also important in a well-established SSF. No removal of PhiX174 was observed in 0-5 cm with a thick biofilm, which indicates that the thickness of a certain level would impact the performance of virus removal.
To determine mechanisms, filter material from 0-5 cm was operated under three conditions: active, inactive, and ignited condition. The results show E. coli removal of 0.68, 0.74, and 0.43 logs, PhiX174 removal of 0, 0, and 0.28 logs for active, inhibited, and ignited sand, respectively. Contrary to previous studies, no function of microbial mechanisms is observed for E. coli removal. That key mechanism might change with the different maturity levels of SSFs might be a possible reason. In addition, this may ascribe to incomplete microbial active inhibition. On the other hand, despite evidence that virus removal enhances with filter maturation, schmutzdecke did not improve PhiX174 removal. Poor virus removal may be attributed to higher interstitial velocity along with higher shearing forces caused by abundant biofilm within the schmutzdecke.
Journal article
(2010)
-
B.C.
Arnold
(author),
B.C.
Arnold
(author),
G
Chen
(author),
G
Chen
(author),
D.
Kong
(author),
D.
Kong
(author),
H.
Park
(author),
H.
Park
(author),
D.
Son
(author),
D.
Son
(author),
S.
SONG
(author),
S.
SONG
(author),
S.
Jung
(author),
S.
Jung
(author),
B.C.
Hong
(author),
B.C.
Hong
(author),
H.
Kim
(author),
H.
Kim
(author),
J.H.
Kim
(author),
J.H.
Kim
(author),
K.S.
Lee
(author),
K.S.
Lee
(author),
S.
Park
(author),
S.
Park
(author),
H
Chen
(author),
H
Chen
(author),
J.
Kim
(author),
J.
Kim
(author),
M.
Choi
(author),
M.
Choi
(author),
G.
Hahn
(author),
G.
Hahn
(author),
S.
Choi
(author),
S.
Choi
(author),
YH
Choi
(author),
YH
Choi
(author),
J.L.
Goh
(author),
J.L.
Goh
(author),
H.
Jeong
(author),
H.
Jeong
(author),
T.
Kim
(author),
T.
Kim
(author),
J
Lee
(author),
J
Lee
(author),
S
Lee
(author),
S
Lee
(author),
C.
Jiang
(author),
C.
Jiang
(author),
Chenpeng
Jiang
(author),
Chenpeng
Jiang
(author),
Chengpeng
Jiang
(author),
Chengpeng
Jiang
(author),
P.I.
Petrov
(author),
P.I.
Petrov
(author),
J.
Williams
(author),
J.
Williams
(author),
M.
Ahmad
(author),
M.
Ahmad
(author),
M.
Ahmad
(author),
I.
Ahmed
(author),
I.
Ahmed
(author),
I.
Ahmed
(author),
M.S.
Asghar
(author),
M.S.
Asghar
(author),
M.S.
Asghar
(author),
M.A.A.
Awan
(author),
M.A.A.
Awan
(author),
M.A.A.
Awan
(author),
I.
Hussain
(author),
I.
Hussain
(author),
I.
Hussain
(author),
M.W.
Khan
(author),
M.W.
Khan
(author),
M.W.
Khan
(author),
S.
Muhammad
(author),
S.
Muhammad
(author),
S.
Muhammad
(author),
H.
Shahzad
(author),
H.
Shahzad
(author),
H.
Shahzad
(author),
D.
Liang
(author),
D.
Liang
(author),
P.M.
Zalewski
(author),
P.M.
Zalewski
(author),
A.E.
David
(author),
A.E.
David
(author),
P
Ribeiro
(author),
P
Ribeiro
(author),
P
Ribeiro
(author),
P
Ribeiro
(author),
PGR
Silva
(author),
PGR
Silva
(author),
PGR
Silva
(author),
PGR
Silva
(author),
M.
Finger
(author),
M.
Finger
(author),
M
Finger
(author),
M
Finger
(author),
M
Finger
(author),
M
Finger
(author),
M.
Finger
(author),
M.
Finger
(author),
A.
Denisov
(author),
A.
Denisov
(author),
V.
Kim
(author),
V.
Kim
(author),
A.
Anisimov
(author),
A.
Anisimov
(author),
A. G.
Anisimov
(author),
A. G.
Anisimov
(author),
Andrei G.
Anisimov
(author),
Andrei G.
Anisimov
(author),
A.J.
Levine
(author),
A.J.
Levine
(author),
B.
Liu
(author),
B.
Liu
(author),
V.
Petrov
(author),
V.
Petrov
(author),
M.
Daniël
(author),
M.
Daniël
(author),
J.I.
Hernandez
(author),
J.I.
Hernandez
(author),
J.I.
Hernández
(author),
J.I.
Hernández
(author),
Jose Ignacio
Hernández
(author),
Jose Ignacio
Hernández
(author),
Jose Ignacio
Hernandez
(author),
Jose Ignacio
Hernandez
(author),
José Ignacio
Hernandez
(author),
José Ignacio
Hernandez
(author),
José Ignacio
Hernández
(author),
José Ignacio
Hernández
(author),
B.
Gómez
(author),
B.
Gómez
(author),
J.
Bos
(author),
J.
Bos
(author),
D.
Campi
(author),
D.
Campi
(author),
M.
Hansen
(author),
M.
Hansen
(author),
J.
Harvey
(author),
J.
Harvey
(author),
H.
Hoffmann
(author),
H.
Hoffmann
(author),
R.J.
Loos
(author),
R.J.
Loos
(author),
X
Meng
(author),
X
Meng
(author),
F.E.
Meijers
(author),
F.E.
Meijers
(author),
M.
Mulders
(author),
M.
Mulders
(author),
L.
Orsini
(author),
L.
Orsini
(author),
E
Perez
(author),
E
Perez
(author),
A.
Sharma
(author),
A.
Sharma
(author),
S.
König
(author),
S.
König
(author),
F.A.
Meier
(author),
F.A.
Meier
(author),
Z.
Chen
(author),
Z.
Chen
(author),
A.J.H.
Herve
(author),
A.J.H.
Herve
(author),
A.
Sanchez
(author),
A.
Sanchez
(author),
J.
Tao
(author),
J.
Tao
(author),
M.
Weber
(author),
M.
Weber
(author),
A.
Schmidt
(author),
A.
Schmidt
(author),
Y.
Chang
(author),
Y.
Chang
(author),
E.
Chen
(author),
E.
Chen
(author),
W.
Chen
(author),
W.
Chen
(author),
A.C.S.
Go
(author),
A.C.S.
Go
(author),
C.
Kuo
(author),
C.
Kuo
(author),
S
Li
(author),
S
Li
(author),
W
Lin
(author),
W
Lin
(author),
P.L.T.
Chang
(author),
P.L.T.
Chang
(author),
J
Wang
(author),
J
Wang
(author),
Y.
Chao
(author),
Y.
Chao
(author),
K.
Chen
(author),
K.
Chen
(author),
Kewang
Chen
(author),
Kewang
Chen
(author),
Y.
Lei
(author),
Y.
Lei
(author),
S.
Lin
(author),
S.
Lin
(author),
R.
Lu
(author),
R.
Lu
(author),
J
Schumann
(author),
J
Schumann
(author),
J
Schumann
(author),
J
Schumann
(author),
C.C.
Wang
(author),
C.C.
Wang
(author),
Charlie C.L.
Wang
(author),
Charlie C.L.
Wang
(author),
Charlie
Wang
(author),
Charlie
Wang
(author),
Meng
Wang
(author),
Meng
Wang
(author),
M.
Wang
(author),
M.
Wang
(author),
M.
Kaya
(author),
M.
Kaya
(author),
M.
Kaya
(author),
M.
Kaya
(author),
Mesut
Kaya
(author),
Mesut
Kaya
(author),
Mesut
Kaya
(author),
Mesut
Kaya
(author),
M.O.
Kaya
(author),
M.O.
Kaya
(author),
M.O.
Kaya
(author),
M.O.
Kaya
(author),
Z
Wang
(author),
Z
Wang
(author),
N.O.
Sonmez
(author),
N.O.
Sonmez
(author),
N.O.
Sonmez
(author),
N.O.
Sonmez
(author),
T.O.C.
Cheng
(author),
T.O.C.
Cheng
(author),
M.
Hansen
(author),
M.
Hansen
(author),
RR
Brown
(author),
RR
Brown
(author),
J.
Williams
(author),
J.
Williams
(author),
J.P.
Hays
(author),
J.P.
Hays
(author),
A.
Papageorgiou
(author),
A.
Papageorgiou
(author),
A.V.
Rose
(author),
A.V.
Rose
(author),
A.
Khan
(author),
A.
Khan
(author),
R.E.
Taylor
(author),
R.E.
Taylor
(author),
Z.
Xue
(author),
Z.
Xue
(author),
J.
Rohlf
(author),
J.
Rohlf
(author),
S
Wu
(author),
S
Wu
(author),
S.
Bhattacharya
(author),
S.
Bhattacharya
(author),
D.C.C.
Nguyen
(author),
D.C.C.
Nguyen
(author),
P.
Cox
(author),
P.
Cox
(author),
H
Liu
(author),
H
Liu
(author),
M.
Nikolic
(author),
M.
Nikolic
(author),
J.N.V.
Smith
(author),
J.N.V.
Smith
(author),
M.
Tripathi
(author),
M.
Tripathi
(author),
J.H.C.
Hauser
(author),
J.H.C.
Hauser
(author),
Sonja
Schmid
(author),
Sonja
Schmid
(author),
S.
Schmid
(author),
S.
Schmid
(author),
Z.
Zhang
(author),
Z.
Zhang
(author),
X.
Yang
(author),
X.
Yang
(author),
A.
Chandra
(author),
A.
Chandra
(author),
F.
LIU
(author),
F.
LIU
(author),
H
Liu
(author),
H
Liu
(author),
A.
Luthra
(author),
A.
Luthra
(author),
H.
Nguyen
(author),
H.
Nguyen
(author),
B.
Shen
(author),
B.
Shen
(author),
V.
Sharma
(author),
V.
Sharma
(author),
S.C.
Simon
(author),
S.C.
Simon
(author),
Y.
Ma
(author),
Y.
Ma
(author),
J.
Cai
(author),
J.
Cai
(author),
Y.
Yang
(author),
Y.
Yang
(author),
L
Zhang
(author),
L
Zhang
(author),
K.
Zhu
(author),
K.
Zhu
(author),
Kailun
Zhu
(author),
Kailun
Zhu
(author),
R.
Zhu
(author),
R.
Zhu
(author),
B.
Akgün
(author),
B.
Akgün
(author),
S.
Wagner
(author),
S.
Wagner
(author),
A.
Chatterjee
(author),
A.
Chatterjee
(author),
A.
Chatterjee
(author),
Anasua
Chatterjee
(author),
Anasua
Chatterjee
(author),
Anasua
Chatterjee
(author),
S.
Das
(author),
S.
Das
(author),
B.A.
Kreis
(author),
B.A.
Kreis
(author),
VB
Kuznetsov
(author),
VB
Kuznetsov
(author),
VB
Kuznetsov
(author),
VB
Kuznetsov
(author),
Y.
GE
(author),
Y.
GE
(author),
X.
Shi
(author),
X.
Shi
(author),
Wenbo
Sun
(author),
Wenbo
Sun
(author),
W.
Sun
(author),
W.
Sun
(author),
W.Y.
Teo
(author),
W.Y.
Teo
(author),
Y.
Weng
(author),
Y.
Weng
(author),
S.
Banerjee
(author),
S.
Banerjee
(author),
P.
Bhat
(author),
P.
Bhat
(author),
J.G.
Butler
(author),
J.G.
Butler
(author),
H.Y.
Cheung
(author),
H.Y.
Cheung
(author),
D.M.J.
Dykstra
(author),
D.M.J.
Dykstra
(author),
L.
Feng
(author),
L.
Feng
(author),
S.
GUO
(author),
S.
GUO
(author),
Y.
Guo
(author),
Y.
Guo
(author),
M.K.P.
Johnson
(author),
M.K.P.
Johnson
(author),
C.
Jones
(author),
C.
Jones
(author),
J.
Kaiser
(author),
J.
Kaiser
(author),
C.O.S.
Lei
(author),
C.O.S.
Lei
(author),
S.A.
Los
(author),
S.A.
Los
(author),
K.A.
Mishra
(author),
K.A.
Mishra
(author),
R.V.
Rivera
(author),
R.V.
Rivera
(author),
S.
Ryu
(author),
S.
Ryu
(author),
Shubham
Sharma
(author),
Shubham
Sharma
(author),
S.
Sharma
(author),
S.
Sharma
(author),
Z.
Hu
(author),
Z.
Hu
(author),
R.
Smith
(author),
R.
Smith
(author),
R.A.
Vidal
(author),
R.A.
Vidal
(author),
W.
Wu
(author),
W.
Wu
(author),
J.
Yun
(author),
J.
Yun
(author),
M
Chen
(author),
M
Chen
(author),
Y.
Fu
(author),
Y.
Fu
(author),
J.
Gartner
(author),
J.
Gartner
(author),
Johannes
Gartner
(author),
Johannes
Gartner
(author),
B.
Kim
(author),
B.
Kim
(author),
D.
Wang
(author),
D.
Wang
(author),
L.
Kramer
(author),
L.
Kramer
(author),
Y.
Mao
(author),
Y.
Mao
(author),
J.L.
Rodriguez
(author),
J.L.
Rodriguez
(author),
M
Bertoldi
(author),
M
Bertoldi
(author),
J
Chen
(author),
J
Chen
(author),
J.
Haas
(author),
J.
Haas
(author),
K.
Johnson
(author),
K.
Johnson
(author),
M.G.A.
Adams
(author),
M.G.A.
Adams
(author),
MC
Castro
(author),
MC
Castro
(author),
D.
Hofman
(author),
D.
Hofman
(author),
E.
Albayrak
(author),
E.
Albayrak
(author),
RO
Briggs
(author),
RO
Briggs
(author),
RO
Briggs
(author),
RO
Briggs
(author),
S
Qian
(author),
S
Qian
(author),
L.F.K.
Chung
(author),
L.F.K.
Chung
(author),
I
Schmidt
(author),
I
Schmidt
(author),
S.
Sen
(author),
S.
Sen
(author),
J.
Wetzel
(author),
J.
Wetzel
(author),
K.W.A.
Yi
(author),
K.W.A.
Yi
(author),
Z.
Guo
(author),
Z.
Guo
(author),
N.Q.
Tran
(author),
N.Q.
Tran
(author),
Y
Zhang
(author),
Y
Zhang
(author),
S.J.
Sanders
(author),
S.J.
Sanders
(author),
T.K.
Bolton
(author),
T.K.
Bolton
(author),
H.H.
Teng
(author),
H.H.
Teng
(author),
A.
Liu
(author),
A.
Liu
(author),
Z.
Wan
(author),
Z.
Wan
(author),
D.J.
Wright
(author),
D.J.
Wright
(author),
G.
Bauer
(author),
G.
Bauer
(author),
M.
Chan
(author),
M.
Chan
(author),
Michael
Chan
(author),
Michael
Chan
(author),
Y.
Kim
(author),
Y.
Kim
(author),
Y.
Lee
(author),
Y.
Lee
(author),
W
Li
(author),
W
Li
(author),
T.
Ma
(author),
T.
Ma
(author),
M.
Rudolph
(author),
M.
Rudolph
(author),
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Zhu
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G.
Kim
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Commissioning studies of the CMS hadron calorimeter have identified sporadic uncharacteristic noise and a small number of malfunctioning calorimeter channels. Algorithms have been developed to identify and address these problems in the data. The methods have been tested on cosmic
...
Commissioning studies of the CMS hadron calorimeter have identified sporadic uncharacteristic noise and a small number of malfunctioning calorimeter channels. Algorithms have been developed to identify and address these problems in the data. The methods have been tested on cosmic ray muon data, calorimeter noise data, and single beam data collected with CMS in 2008. The noise rejection algorithms can be applied to LHC collision data at the trigger level or in the offline analysis. The application of the algorithms at the trigger level is shown to remove 90% of noise events with fake missing transverse energy above 100 GeV, which is sufficient for the CMS physics trigger operation.
@en