Effect of desulfurization Ash-FeCl3 on sludge dewatering performance

2015 ◽  
pp. 311-314
Author(s):  
W Chen ◽  
Y Chen ◽  
C Song
Keyword(s):  
Sludge Dewatering

EVALUATION OF BAGASSE PITH AS A SKELETON BUILDER FOR IMPROVEMENT OF SLUDGE DEWATERING

2016 ◽  
Vol 15 (4) ◽  
pp. 725-732 ◽  
Author(s):  
Yalda Hashempour ◽  
Nematallah Jaafarzadeh ◽  
Afshin Takdastan ◽  
Mehdi Ahmadi Moghadam ◽  
Gholamreza Goodarzi
Keyword(s):  
Sludge Dewatering ◽  
Bagasse Pith ◽  
Skeleton Builder

Development of New Polymer Dosage Control Method for Sludge Dewatering Process

1993 ◽  
Vol 28 (11-12) ◽  
pp. 263-272 ◽  
Author(s):  
Chiaki Igarashi ◽  
Kazunari Tanaka ◽  
Teruaki Kitamura ◽  
Kazuo Fujita ◽  
Kazuaki Arai ◽  
...  
Keyword(s):  
Control Method ◽  
Sludge Dewatering ◽  
Proportional Control ◽  
Sludge Characteristics ◽  
Streaming Current

In a sludge dewatering process using polymer, controlling the polymer dosage is an important factor for upgrading performance and achieving a saving on costs. A new automatic polymer dosage control method has been developed by the authors, which features the use of a streaming current detector or a colloid titrator. These detectors detect the colloidal charge of the filtrate from sludge. The said method was used with actual dehydrators and the following advantages were confirmed.(1) The said method is applicable for various types of dehydrators.(2) The said method is effective even when there are changes in sludge characteristics.(3) The said method is more economical than a conventional solids proportional control method in that less polymer is used.

Effect of the Surface Characteristics of Seed on Copper Precipitation

1992 ◽  
Vol 26 (9-11) ◽  
pp. 2141-2143 ◽  
Author(s):  
Y. Wang ◽  
P. R. Anderson
Keyword(s):  
Surface Area ◽  
Surface Characteristics ◽  
Sludge Dewatering ◽  
Seed Surface ◽  
Copper Precipitation ◽  
Precipitation System ◽  
Sludge Properties ◽  
Precipitation Ph ◽  
Preliminary Study

Two types of seed with different surface area are used in a precipitation system to evaluate the effectiveness of seed surface characteristics on sludge dewatering properties. We expect that the surface area of the seed will stongly affect the sludge properties. The preliminary study shows that the seeded system has a lower precipitation pH and lower supersaturation level.

Control Strategies for a Highly Loaded Biological Ammonia Elimination Process

1993 ◽  
Vol 28 (11-12) ◽  
pp. 531-538 ◽  
Author(s):  
B. Teichgräber
Keyword(s):  
Closed Loop ◽  
Control Strategies ◽  
Level Control ◽  
Sludge Dewatering ◽  
Loop Control ◽  
Reject Water ◽  
Line Measurement ◽  
Control Pattern ◽  
On Line ◽  
Treatment Facilities

A nitrification/denitrification process was applied to reject water treatment from sludge dewatering at Bottrop central sludge treatment facilities of the Emschergenossenschaft. On-line monitoring of influent and effluent turbidity, closed loop control of DO and pH, and on-line monitoring of nitrogen compounds were combined to a three level control pattern. Though on-line measurement of substrate and product showed substantial response time it could be used to operate nitrification/denitrification within process boundaries.

Comparison of lime and alum as oily sludge conditioners

1997 ◽  
Vol 36 (12) ◽  
pp. 117-124 ◽  
Author(s):  
Tay Joo Hwa ◽  
S. Jeyaseelan
Keyword(s):  
Specific Resistance ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Oily Sludge ◽  
Sludge Dewatering ◽  
Capillary Suction ◽  
Sludge Cake ◽  
Solids Content ◽  
Optimum Chemical

Chemical conditioning improves sludge dewatering. Choice of chemical conditioners is very much dependent on the characteristics of the sludges and the type of dewatering devices. Lime, alum, ferric chloride and polyelectrolytes are commonly used chemical conditioners. Anaerobic digested sludge samples collected from a sewage treatment plant with different oil contents varying from 1.8% to 8.0% by weight have been examined in the laboratory to find out their specific resistance, capillary suction time and filter yield. Lime and alum were used separately as conditioners. Different dosages of conditioner varying from 2% to 12% by weight were used to determine the optimum chemical dosage for varying oil contents. Lime dosages of about 6% were found to yield favourable characteristics. Addition of alum decreases the specific resistances and capillary suction times of oily sludges rapidly up to 4% dosages. Alum dosages beyond 4% only increase the solids content in the sludge cake and increase the sludge volume to be handled. A correlation between CST and specific resistance to filtration was established. CST can be measured easily and quickly in the laboratories. Using the CST and the correlation a quick prediction on dewaterability can be established.

Simultaneous implementation of sludge dewatering and solid biofuel production by microwave torrefaction

2021 ◽  
Vol 195 ◽  
pp. 110775
Author(s):  
Congyu Zhang ◽  
Shih-Hsin Ho ◽  
Wei-Hsin Chen ◽  
Chun Fong Eng ◽  
Chin-Tsan Wang
Keyword(s):  
Biofuel Production ◽  
Sludge Dewatering ◽  
Solid Biofuel ◽  
Simultaneous Implementation

Using seafood waste as sludge conditioners

2001 ◽  
Vol 44 (10) ◽  
pp. 301-307 ◽  
Author(s):  
D.Y. Lee ◽  
S.R. Jing ◽  
Y.F. Lin
Keyword(s):  
Ferric Chloride ◽  
Specific Resistance ◽  
Oyster Shell ◽  
Particle Sizes ◽  
Sludge Dewatering ◽  
Insignificant Effect ◽  
Shrimp Shell ◽  
Ph Decrease ◽  
Shell Particles ◽  
Bone Particles

In this study, three kinds of seafood wastes (shrimp shell particles, oyster shell particles, and internal bone particles of squid) were added to dewatered sludge preconditioned with chemical conditioner (alum or ferric chloride). The specific resistance of sludge dewatering was calculated to evaluate the effectiveness of sludge dewatering. The result showed that adding chemical conditioners alone caused noticeable pH decrease and resulted in a conditioned sludge with poor filterability. The addition of oyster shell or internal bone of squid to chemically preconditioned sludge efficiently improved sludge dewatering. This result was possibly due to both the availability of alkaline and the function as skeleton builder provided by these two waste solids. Particle sizes (0.59-2.0 mm) of oyster shell and internal bone of squid were found to have insignificant effect on sludge dewatering.

Sign in / Sign up

Export Citation Format

Share Document