dewatering behavior improved

US4861492A - Method of dewatering sewage sludge ...

Method for dewatering sewage sludge with the aid of organic polymeric flocculating agents (polyelectrolytes) made preferably by emulsion polymerization. To obtain optimum dewatering results, a substantial amount of the aqueous phase of the sludge is removed by decantation after flocculant addition prior to the dewatering treatment proper.

GUIDELINES FOR DEWATERING/DENSIFYING CONFINED …

GUIDELINES FOR DEWATERING/DENSIFYING CONFINED DREDGED MATERIAL 1. Purpose. The purpose of this manual is to discuss the major concerns and provide information about design, construction, operation and manage-ment of containment areas for dredged material wherein the material is dewatered and densified. This dewatering is done in order to create ...

Effects of Surfactants on the Improvement of Sludge ...

Nevertheless, sludge dewatering remains expensive . Chemicals, such as alum, polymeric ferric sulfate, polyacrylamide, and chitosan, are typically incorporated in sludge to improve the dewaterability –. Flocculants, given at the fixed dosages, are commonly used in conditioning the physical and chemical properties of sludge to improve sludge ...

Carbon-based materials reinforced waste activated sludge ...

Therefore, addition of CBMs is expected to improve WAS electro-dewatering performance for fuel treatment by enhancing sludge conductivity and filterability. In this study, we evaluated the effects of the three carbon materials (AC-0, AC-5, and graphite) on sludge electro-dewatering behavior and the flammability of sludge cakes.

A study of the improvement in dewatering behavior of ...

Abstract. Wastewater sludge is classified as a difficult dewatering material (DDM) due to the high cake specific resistance (CSR). On the other hand, fly ash is classified as an easy dewatering material (EDM), which suggests that it might be able to improve the dewaterability of wastewater sludge.

Effects of Surfactants on the Improvement of Sludge ...

In some cases, the reduction in surface tension and the increase in hydrophobicity or a combination of both are able to improve surfactant dewatering . Interfacial tension can be reduced in the sludge system by adding CTAB, a good dewatering performance is obtained .

SolarPress Press roll covers for the highest dewatering ...

greatly improved as compared to earlier models. Due to these properties, maximum groove depths and widths in particular can be implemented in the surface design. The versatile surface designs give additional void volume for the press roll covers, improve dewatering behavior in the nip and increase dry content. SolarPress A high-performance cover

Effects of potassium permanganate conditioning on ...

Effects of potassium permanganate conditioning on dewatering and rheological behavior of pulping activated sludge: mechanism and feasibility† Xin Zhang, abd Hui Cai,abd Jun Shenc and Hui Zhang*a The difficulties in sludge dewatering are associated with the high organic content, colloidal materials in

Cake dewatering of some iron ore industrial products ...

This paper is concerned with studying the dewatering behavior of three samples of iron ore products. The objective is to improve the industrial filtration performance by taking into account the laboratory results. Mineral samples came from the Iron Ore Quadrangle in the state of Minas Gerais, Brazil.

Improved dewatering behavior of clay minerals dispersions ...

Improved dewatering behavior of clay minerals dispersions via interfacial chemistry and particle interactions optimization Authors: McFarlane, Angus ; Bremmell, Kristen ; Addai-Mensah, Jonas

Application of Dewatering Technologies in... | ERA

If produced on-spec, the main advantage of CT/NST would be its improved dewatering behavior and rapid release of relatively clear water during the hindered settling and self-weight consolidation, while a majority of the fine particles are entrapped within the matrix of its coarser fraction (sand).

Dewatering Behavior of Centrifuged Oil Sand Fine Tailings ...

was to investigate the dewatering behavior of centrifuged oil sand fine tailings for surface deposition using laboratory investigation program and numerical modeling. A material with 60% solids (e = 1.5) was obtained using a bench-scale centrifuge. The fine grained material (52% clay fraction) with a moderate water adsorption capacity

TensioMaster – Feltest

Common problems are: less fabric stability, wrinkles, fabric wear, changing dewatering behavior, distorted paper profiles, increased bearing load, broken rolls and torn fabrics. With a dial or a mechanical tension gauge, such as the Tensiomaster, these problems will belong to the past.

Angus McFarlane | CSIRO - Academia.edu

Improved dewatering behavior of clay minerals dispersions via interfacial chemistry and particle interactions optimization more by Angus McFarlane and Kristen Bremmell Orthokinetic flocculation of clay dispersions at pH 7.5 and 22 degrees C has been investigated to determine the influence of interfacial chemistry and shear on dewatering and ...

Evaluation of Dewatering Performance and Fractal ...

Jun 29, 2015· The dewatering performance and fractal characteristics of alum sludge from a drinking-water treatment plant were investigated in this study. Variations in residual turbidity of supernatant, dry solid content (DS), specific resistance to filtration (SRF), floc …

Improved dewatering behavior of clay minerals dispersions ...

Jan 01, 2006· Polyacrylamide addition, whilst strongly facilitating primary dewatering, at best, played an indifferent role toward improving consolidation of the clay dispersions. The shear induced consolidation behavior appears to result from improved floc network restructuring and inter-floc permeability.

Improved dewatering behavior of clay minerals ... - DeepDyve

Jan 01, 2006· Read "Improved dewatering behavior of clay minerals dispersions via interfacial chemistry and particle interactions optimization, Journal of Colloid and Interface Science" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

A Statistical Model for Slurry Thickening

depends on the rate and amount of slurry dewatering (Bustos et al., 1999). The behavior of a slurry, which is governed by ore geology and the metal extraction process, can be improved by agglomerating individual particles and/or particle groups to develop multi-particle flocs that can settle rapidly (Torfs et al., 1996). Long-chain

Improved dewatering of nickel laterite ore slurries using ...

Improved dewatering of nickel laterite ore slurries using superabsorbent polymers Article in Advanced Powder Technology · July 2016 with 40 Reads DOI: 10.1016/j.apt.2016.07.010

Wet pressing webs of higher-yield kraft pulp for improved ...

Wet pressing webs of higher-yield kraft pulp for improved strength Daniel F. Caulfield, Teresa L. Young, and Theodore H. Wegner ... where dewatering behavior is pressure limited, increasing press nip pressure is the most effective means of ... Wet pressing webs of higher-yield kraft pulp for improved strength ...

Method of dewatering sewage sludge particularly on ...

Aug 29, 1989· The flocculated and thickened sludge may then be dewatered much more quickly with the dewatering behavior improved additionally by causing a reactivating flocculation to take place on the delivery side of the sludge feed pump. The Figures show a preferred embodiment of the inventive sludge dewatering system using a recessed plate press.

Conditioning and Dewatering Behavior of ATAD Sludges

The role of iron in improving the dewatering of the sludges was found to be important, with the sludge dewatering being better for sludges with a high iron content. The combination of high pH, divalent cation precipitation, iron deficiency and biopolymer release all contribute to the poor dewatering …

(PDF) Optimising the dewatering behaviour of clay tailings ...

Introduction effective pulp dewatering since the floc structures formed through flocculant assisted gravity thickening typically Optimising mineral waste tailings dewatering behaviour retain > 88% water [5] due to the underlying interfacial has both direct and indirect influence in …

The effects of polymeric additive on papermaking

The effects of polymeric additive on papermaking . Theodore H. Wegner . Chemical Engineer, USDA Forest Service, Forest Products Laboratory, One Gifford ... polyacrylamide had no effect on web behavior during wet-press dewatering. Water removal . Polyacrylamide did, however, reduce the web drying rate and sheet burst ... additives improve the ...

Surface Phenomena in the Dewatering of Coal - nepis.epa.gov

The dewatering rate, the dewatering behavior of various narrow size distributions, and the addition of several floc- culants, oils, and wetting agents (surfactants) were investigated. Gray found that dewatering was improved by each of the above additions; and he alludes to the fact that the efficacy of several highly impure oils in dewatering ...

A NOVEL FINE COAL DEWATERING PROCESS WITH …

Intelligent Filter Press to improve the fine coal dewatering process and the handling of fine coal. The product, a biomass/fine coal mixture, can be used in cocombustion for - power production. In this project, both vacuum and filter press filtration behaviors of biomass/fine coal …

Wet-end Paper Starches | Cargill

The paper-making process involves a complex mix of natural and synthetic polymers interacting through mechanical shear forces. Cargill's cationic starches for the wet-end production phase are far more than just dry strength additives.

Impact of Clay Minerals on the Dewatering of Coal Slurry ...

The cleaning process of coals is challenging due to the existence of clay minerals. The overall objective of this study is to investigate how the dewatering of coal slurry is impacted by the presence of clay minerals, i.e., kaolinite and montmorillonite. Filtration tests were first conducted to investigate the effect of kaolinite and montmorillonite on the dewatering efficiency of coal.

Improved Dewatering Behavior of Clay Minerals Dispersions ...

Request PDF on ResearchGate | Improved Dewatering Behavior of Clay Minerals Dispersions Via Interfacial Chemistry and Particle Interactions Optimization | Orthokinetic flocculation of clay ...

Dewatering Behavior of a Wood-Cellulose Nanofibril ...

8 · Dewatering Behavior of a Wood-Cellulose Nanofibril Particulate System ... Hakovirta et al. employed a method to improve the dewatering efficiency of pulp furnish through the addition of ...