Synthesis, characterization, and secondary sludge dewatering performance of a novel combined silicon–aluminum–iron–starch flocculant

2015 ◽  
Vol 285 ◽  
pp. 199-206 ◽  
Author(s):  
Qintie Lin ◽  
Huanlong Peng ◽  
Songxiong Zhong ◽  
Jiangxin Xiang
Keyword(s):  
Sludge Dewatering ◽  
Secondary Sludge ◽  
Aluminum Iron

A laboratory sludge press for characterizing sludge dewatering

1997 ◽  
Vol 35 (2-3) ◽  
pp. 189-196 ◽  
Author(s):  
T. Rehmat ◽  
R. Branion ◽  
S. Duff ◽  
M. Groves
Keyword(s):  
Flow Rate ◽  
Applied Pressure ◽  
Screw Press ◽  
Laboratory Scale ◽  
Sludge Dewatering ◽  
Mill Scale ◽  
Filtration Resistance ◽  
Secondary Sludge ◽  
Sludge Cake ◽  
Press Time

A laboratory scale sludge press is described. Its use in measuring the specific filtration resistance of a slurry is outlined. The effects of applied pressure and press time on filtrate flow rate and sludge cake solids are discussed as are the effects of various combinations of primary and secondary sludge. Its use in optimizing the polymer formulation for improved dewaterability of sludge in a screw press is detailed. Comparisons of laboratory sludge press predictions and the results of mill scale screw press and belt filter trials are presented.

Characterization and secondary sludge dewatering performance of a novel combined aluminum-ferrous-starch flocculant (CAFS)

2017 ◽  
Vol 173 ◽  
pp. 335-345 ◽  
Author(s):  
Huanlong Peng ◽  
Songxiong Zhong ◽  
Jiangxin Xiang ◽  
Qintie Lin ◽  
Chuang Yao ◽  
...  
Keyword(s):  
Sludge Dewatering ◽  
Secondary Sludge

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

COPPER ALLOY No. 954

Alloy Digest ◽  
1975 ◽  
Vol 24 (2) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Copper Alloy ◽  
Iron Alloy ◽  
High Strength ◽  
Heat Treating ◽  
Good Resistance ◽  
Excellent Corrosion Resistance ◽  
Aluminum Iron ◽  
Copper Aluminum

Abstract Copper Alloy No. 954 is a copper-aluminum-iron alloy characterized by high strength and hardness, good resistance to fatigue and wear, and excellent corrosion resistance. It is suited for service up to 750 F. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: Cu-292. Producer or source: Copper alloy foundries.

AMPCOLOY B-2

Alloy Digest ◽  
1977 ◽  
Vol 26 (3) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Shear Strength ◽  
Physical Properties ◽  
Tensile Properties ◽  
Iron Alloy ◽  
Heat Treating ◽  
General Purpose ◽  
Good Resistance ◽  
Aluminum Iron ◽  
Copper Aluminum

Abstract AMPCOLOY B-2 is a copper-aluminum-iron alloy for general-purpose uses. It has good machinability, good hot-working characteristics and moderate strength. Its many uses include cams, gears, bushings, bearings, marine equipment and other applications requiring good resistance to corrosion. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fatigue. It also includes information on corrosion resistance as well as casting, forming, heat treating, machining, and joining. Filing Code: Cu-329. Producer or source: Ampco Metal Inc..

Increased Stability of Anaerobic Digestion by Controlled Recirculation

1991 ◽  
Vol 23 (7-9) ◽  
pp. 1229-1237
Author(s):  
Chaio-Fuei Ouyang ◽  
Tain-Gen Chang
Keyword(s):  
Substantial Reduction ◽  
Gas Production ◽  
Digested Sludge ◽  
Significant Saving ◽  
Methane Generation ◽  
Sludge Digestion ◽  
Solids Concentration ◽  
Secondary Sludge ◽  
Sludge Recycling ◽  
Growth System

The treatment characteristics of municipal sludge were investigated by the anaerobic activated sludge digestion (AASD) system. This study used the suspended growth system and mesophilic temperature in the digestors and separators; the system achieves a more stable and improved process; such a process configuration offers the possibility of a substantial reduction in the total volume necessary for efficient stabilization. This study presents data indicating that the AASS system is feasible. In general, with an applied solids concentration of TS= 2%, the nonbiodegradable portion of the substrate concentration contained in the primary and secondary sludge was found to be 40.6% and 35.1% on the basis or TVS and COD, respectively. This study also provides evidence that the reactions at a recycling ratio of R=1 and R=3 are considerably more stable than those achieved in conventional or other recycling ratio digestors with a HRT of 9 days or longer. The gas production and bioactivity is also higher than that normally produced by the conventional single-stage digestion system. The experimental results also indicate that the dilution rate exceeds the maximum specific growth rate as the HRT is decreased from 9 days to 6 days. The significant saving in reactor volume and enhanced methane generation should offset the energy required for digested sludge recycling.

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.

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