The rapid dewatering process of wastewater sludge was studied. The effects of two different thickening methods on subsequent conditioning and pressing were compared: gravity thickening and mechanical concentration. The study also investigated the optimal type and the concentration of flocculant added by sludge concentration, which was 0.2%. In terms of mechanical concentration method, under the same formulation of conditioner, the addition of Polyacrylamide(PAM) could significantly promote the dewatering process. Compared with the gravitational sedimentation and the sludge without chemical concentration, the filtration rate and dry-base treatment efficiency of the sludge during pressing were obviously improved, and the moisture content of the sludge cake was reduced.

1.
Xiaohu
 
Dai
. (
2012
).
The Current Situation of Sludge Treatment and Disposal in Cities and Towns in China
.
Water & Wastewater Engineering.
 
48
(
02
):
1
–
5
.
Google Scholar
 
2.
EU EEA
. (
2012
).
European environment agency indicator fact sheet signals 2001-Chapter waste
.
Denmark
:
European Environment Agency
.
3.
Houghton
 
J I
,
Quarmby
 
J
,
Stephenson
 
T.
 (
2001
).
Municipal wastewater sludge dewaterability and the presence of microbial extracellular polymer
.
Water Science&Technology.
 
42
(
2/3
):
373
–
379
.
Google Scholar
 
4.
Novak
 
J T
,
Muller
 
C D
,
Murthy
 
S N.
 (
2001
).
Floc structure and the role of cations
.
Water Science&Technology.
 
44
(
10
):
209
–
213
.
Google Scholar
 
5.
Chao
 
Zhang
,
Bengao
 
Li
,
Yinguang
 
Chen
. (
2011
).
Advance in the Key Factors Affecting the Dewaterability of Waste Activated Sludge
.
Environmental Science & Technology.
34
(
S1
):
152
–
156
.
Google Scholar
 
6.
Xiangyu
 
Long
,
Tengrui
 
Long
,
Ran
 
Tang
. (
2008
).
Effects of EPS on the surface properties and flocculation of activated sludge
.
Water & Wastewater Engineering.
 
11
:
164
–
168
.
Google Scholar
 
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