Optimization of electro-dewatering performance of oily …

As shown in Fig. 2, The experimental setup and design utilized consisted of several components: a DC power unit (SS-6010KD, China), an air compressor (OTS550, China), a dewatering unit, and a detection unit.The dewatering unit was comprised of a nylon barrel reactor with an inner diameter of 10 cm, equipped with a ruthenium-iridium …

Ultra-strong polymeric hollow fiber membranes for saline …

Nevertheless, their salt rejections remain high and are around 97%, which is about 1% less than the rejections evaluated by the standard method using a feed …

Compression dewatering of municipal activated sludge: Effects of salt

Even after mechanical dewatering, activated sludge contains a large amount of water. Due to its composition and biological nature this material is usually highly compressible and known to be difficult to dewater. In the present work, two treatments (salt addition and pH modification) are proposed to highlight some aspects which could …

Simin JIANG | Professor (Associate) | PhD

Salt enriched at the column bottom after unidirectional freezing of brackish water. ... Numerical simulation of deep foundation pit dewatering and optimization of controlling land subsidence ...

Confined aquifer dewatering optimization with a modified …

This study proposes a modified simulation–optimization method for confined aquifer dewatering optimization, which is capable of determining the optimal screen length and depth. The proposed method is based on the linear programming method, and the multivariate adaptive regression splines method is also introduced to develop the …

Study of advanced dewatering and its influence on tunnel in …

The influence of groundwater on sandy dolomite stratum renders it highly susceptible to disasters, resulting in frequent water inrush accidents during tunnel construction. Advanced dewatering is crucial in enhancing tunnel face stability. It is found that sandy dolomite comprises a porous permeable medium consisting of dolomite sand …

Effective Dewatering and Depressurisation at Operational Mine Sites …

Dewatering and depressurisation planning and operation is an iterative process that follows the typical Plan-Do-Check-Act cycle, necessarily taking data and learnings from construction and operation as an input into the next plan iteration. Although this seems like a simple concept, often systems are designed in a one-off, linear way so that ...

Mining Operations Optimize Dewatering Processes

dewatering is usually undertaken for several reasons: • To ensure stability of mine walls during and after excavation—In open-pit mines, a water table that is too high can …

How to Optimize Polymer Efficiency for Better Sludge …

Fairfield-Suisun Sewer District, CA. Solano County, CA, 40 miles North San Francisco. Design capacity: 24 MGD tertiary treatment/ UV. Population served: 135,000. …

The enhanced dewaterability of sludge by a starch-based

Sludge dewatering performance Dosing sequences. Before the dewatering experiment, the effects of three different dosing sequences using grinded or not grinded …

Sludge conditioning, thickening and dewatering optimization …

Mechanical sludge dewatering machine is one of the common equipment in mechanical dewatering, which has the characteristics of high dewatering rate, wide adaptability and low power consumption [7 ...

The optimization of an improved method of fine coal dewatering

An improved method of dewatering fine coal (−500 μm) by vacuum filtration was developed and optimized. Tests on a bench scale vacuum filter showed that when a filter cake was deliberately ...

Fact Sheet: Centrifuge Thickening and Dewatering | US EPA

Centrifugal thickening and dewatering of sewage sludge is a high speed process that uses the force from rapid rotation of a cylindrical bowl to separate wastewater solids from liquid to produce a non-liquid material referred to as "cake.". Dewatering wastewater solids reduces the volume of residuals, improves operation, and reduces …

Optimization of a deep foundation pit dewatering …

curtain was 14–16 m. Our results provide an eective solution and method for optimizing the dewatering scheme in under - ground engineering projects with gypsum-bearing strata. Keywords Dewatering of deep foundation pit · Gypsum-bearing strata · Leakage strength · Ground settlement · Optimization scheme Introduction

Oily cold rolling mill sludge conditioned by quicklime to …

Dewatering is critical to oily cold rolling mill (CRM) sludge treatment. Therefore, finding an efficient, energy-saving, and applicable dewatering technology for oily CRM sludge is still urgent. This study investigated the performance of quicklime as a conditioning agent for oily CRM sludge conditioning and dewatering. The interactive …

Optimization schemes for deep foundation pit dewatering …

The design and optimization of the dewatering scheme for deep foundation pits in a highly permeable heterogeneous layer are critical to protect water resources, control subsidence and mitigate environmental impacts. Numerical simulation is an important and sometimes the only tool in the design of dewatering schemes, especially …

Research progress in improving sludge dewaterability: …

Operational optimization of electrochemical dewatering. In addition to the mechanical dewatering operations such as pressure, processing time, and cake thickness, the performance of electrochemical dewatering is closely associated with electric field conditions including voltage and current (Bai et al., 2019; Zhang et al., 2022c).

Enhanced technology for sewage sludge advanced dewatering …

Compression dewatering of municipal activated sludge: effects of salt and pH. Water Res. (2012) View more references. Cited by (73) ... Coupling mechanism and parameter optimization of sewage sludge dewatering jointly assisted by electric field and mechanical pressure. Science of The Total Environment, Volume 817, 2022, Article …

Optimization of a deep foundation pit dewatering scheme in …

Optimization dewatering scheme. From the perspective of economy and underground engineering construction safety in the paste and salt areas, the …

Dewatering Optimization of Coal Seam Gas Production …

DOI: 10.1021/acs.energyfuels.2c01575 Corpus ID: 251653374; Dewatering Optimization of Coal Seam Gas Production Wells: A Review and Future Perspectives @article{Zhu2022DewateringOO, title={Dewatering Optimization of Coal Seam Gas Production Wells: A Review and Future Perspectives}, author={Yiran Zhu and Zhang Shi …

Improvement of sludge dewaterability with modified cinder …

The relationship between the improvement of sludge dewaterability and variation of organic matters has been studied in the process of sludge pre-conditioning …

Thickener Optimization Package

Thickener Optimization Package The geometry of the TOP™ dewatering cham-ber provides additional solids residence time and a larger inventory for compacted solids. Inclined scrapers are used for further dewater-ing within the chamber. Dewatering Chamber WesTech's approach to elevated tank design is unique. An algorithm has been …

Groundwater dewatering optimization in the Shengli no. 1 …

The results indicate that the dewatering optimization procedure developed in this paper can serve as a useful template and framework for solving mining related water problems. Sketch map of ...

The application of chitosan quaternary ammonium salt to …

Polymers such as polyacrylamide (PAM) and its derivatives have been studied extensively in terms of their selection, design, preparation and optimization for sludge dewatering via bridging flocculation (Zhang et al., 2020). However, the utilization of PAM is typically insufficient to enable a reduction in the dosage of inorganic coagulants ...

Optimization of dewatering systems for mineral processing

The purpose of the dewatering system is to increase the concentration of the solid discharge removed from the pulp in order to increase the amount of water …

Numerical simulation of deep foundation pit dewatering and optimization

3.2.. The hydrogeological conditionThe main types of groundwater in the foundation pit are the unconfined water in the shallow clay aquifer, the sub-confined water in the shallow aquifer of silty soil (④ 2 and ⑤ 2) and the confined water in the deep aquifer of fine sand soil ⑦.The water level (reference level is the sea level of Yellow Sea) of the …

SEPARATION EFFICIENT SLUDGE THICKENING AND …

optimization ensures lowest flocculant consumption, significantly reduced wear, and decreases the total power consumption again by up to 2%. Energy efficiency The …

Research progress in improving sludge dewaterability: …

Sludge dewatering can minimize its amount for transportation and even reduce leachate leakage from landfills (Wu et al., 2020a). Currently, mechanical …

Optimization of surfactant-aided coarse coal dewatering process …

VBC is the most widely used dewatering device for coarse coal in coal preparation plants [4, 14, 15]. White et al. conducted dewatering studies of coarse coal (−25 + 1 mm) in a laboratory centrifuge [1]. The final moisture content of the coarse coal was found to be dependent on the magnitude of the applied centrifugal force and to be ...

Impact of Conditioning Agent Addition Sequence on Dewatering …

The advanced anaerobic digestion process enhances sludge resource utilization. However, thermal hydrolysis pretreatment of anaerobically digested sludge reduces dewatering efficiency due to excessive organic matter decomposition. This necessitates significant time and effort for sludge conditioning in wastewater treatment …

Ultra-strong polymeric hollow fiber membranes for saline dewatering …

Nevertheless, their salt rejections remain high and are around 97%, which is about 1% less than the rejections evaluated by the standard method using a feed solution of 2000 ppm or 0.034 mol/L ...

Cost Optimization of Osmotically Assisted Reverse Osmosis …

Abstract. We develop a nonlinear optimization model to identify minimum cost designs for osmotically assisted reverse osmosis (OARO), a multistaged membrane-based process for desalinating high-salinity brines. The optimization model enables comprehensive evaluation of a complex process configuration and operational …

Conditioning for excess sludge and ozonized sludge by ferric salt …

Conditioning for excess sludge and ozonized sludge by ferric salt and polyacrylamide: Orthogonal optimization, rheological characteristics and floc properties. Author links open overlay panel Wei Wu a, ... Dewatering is an essential and important step during the sludge treatment and disposal process for it could efficiently …

Enhanced dewatering of waste-activated sludge by …

The feasibility of composite hydrolysis enzymes in enhanced dewatering of waste-activated sludge (WAS) was verified in this study. A Pearson correlation analysis was conducted to explore the roles of different extracellular polymeric substance (EPS) fractions on WAS dewaterability. The results indicated that tightly bound EPS (TB-EPS) was …

Mathematical model and optimization of continuous …

Central to these dewatering techniques to reduce MC are the effective liberation of bound water. Electro-dewatering process, a promising and fascinating approach to intensify mechanical dewatering, has attracted considerable attention (Visigalli et al., 2017; Dizon and Orazem, 2019; Li et al., 2021b).

Improvement of wastewater sludge dewatering …

In this study, the effects of chemical conditioning using titanium salt coagulants (TSCs) of different hydrolysis speciation in combination with magnetic nano-particles on dewatering performance of waste activated sludge were evaluated by means of specific resistance to filtration (SRF) and capillary suction time (CST). The …