As an emerging deep-dewatering process, electro-dewatering technology is capable of reducing the MC of sludge to below 60% by applying electric field during …

Abstract. A newly developed numerical model is used to identify and evaluate optimum electrode configurations for electro-osmosis dewatering, as well as to evaluate approaches such as current ...

The electro‐dewatering method is regarded as a promising approach to reduce the water content in sludge. Laboratory scale non‐pressure and pressure‐driven dewatering reactors were set up to study the dewatering rate in different types of sludge and the water content in the final sludge cake after electro‐dewatering process.

In the process of sludge electro-dewatering (EDW), ions migration accompanied has significant influences on the dewatering efficiency. However, the effects of ions on sludge electrochemical properties and the roles in EDW are still not well understood. ... Water Res., 55 (2014), pp. 225-232, 10.1016/j.watres.2014.02.014. View …

The electro-dewatering flowrate from each electrode was shown to be unaffected by the position of the filter cloth for any of the electrode arrangements. These …

Electro-dewatering (ED) is an attractive technology for enhancing dewaterability and improving the sustainability of waste activated sludge (WAS) handling. However, electrically assisted mechanical dewatering processes consume more energy and the extracellular polymeric substance (EPS) dissolution caused by electrochemical …

However, the electro-dewatering technology is still not commonly used in industry. In a recent paper, Citeau et al. (2016) highlighted four main problems that hampered the development of the EDW technology: " (1) significant risk of ohmic heating, (2) high electric energy consumption at terminal stages of the dewatering, (3) …

Dewatering is an essential part of sludge management system and plays an important role in reducing the volume and weight of sludge by removing various types of water from the sludge (Shi et al., 2015).Based on the binding energies between water and solid sludge particles, sludge water may be divided into four different types (Vaxelaire …

Electro-dewatering transport improved with a higher initial water content or lower initial soil salinity, but was steady when the real-time soil properties changed. An interpretation of the experimental results is presented from the perspective of the electro-dewatering mechanism. The solid–water–ion interaction system of the soil was ...

In recent times, there has been a rise in interest on the applications of electro-technology based food processing methods. With drying in food industries being an energy intensive process with huge environmental impacts, the objective of this study was to design and develop a purpose-built laboratory system, for experimentally …

Electric field-assisted dewatering, also called electro-dewatering (EDW), is a technology in which a conventional dewatering mechanism such a pressure dewatering is combined with electrokinetic effects to realize an improved liquid/solids separation, to increase the final dry solids content and to accelerate the dewatering process with low energy …

Jajuee et al. [70] patented a continuous electrokinetic process for dewatering oil-sand tailings, which consisted of an auger and perforated tube.The auger shaft and the tube served as the anode and cathode, respectively. Laboratory-scale experiments performed on a 2.54 cm diameter tube with an electric field of 40 V/cm demonstrated …

1. Introduction. Sludge is a by-product of wastewater treatment and its dewatering is an essential step to make the transportation and disposal of sludge physically and economically feasible (Subramanian et al., 2010, Devlin et al., 2011, Xiao et al., 2016).In China, the dramatic increase in municipal wastewater treatment capacity …

And if the electro-dewatering technology was applied to firstly dewatering to about 60.0 wt%, then the air-drying method was used to dry to 10.0 wt% water content, the energy consumption was only ...

Electro-dewatering (ED) is a novel technology to reduce the overall costs of residual biosolids processing, transport, and disposal. In this study, we investigated Joule heating and pH as parameters controlling the dewaterability limit, dewatering rate, and energy efficiency. Temperature-controlled electrodes revealed that Joule heating enhances …

Electro-kinetic dewatering was very effective in reducing the weight of the protein-rich sludge. In our bench-scale experiments, using two vertical electrodes, more than half the water content could be removed with a sufficient electrical field, i.e. 20 V at an electrode spacing of 4 cm. While further increase in the electric field to 30 V ...

An increasing body of evidence (1,4,5) suggests that reversal of electrode polarity or current direction during electro-osmosis leads to improved consolidation and more efficient dewatering. This note reviews the evidence and presents results of recent laboratory tests bearing directly on this question.

Electro-dewatering process, a promising and fascinating approach to intensify mechanical dewatering, has attracted considerable attention ... On the basis of PARAFAC analysis, four fluorescence components were identified at Ex/Em of 225–245/330–350 (peak A), 280/340 (peak B), 280/420 (peak C), and 360/440 (peak D) ...

The effects of these electric field applications and the electrode arrangements and configurations on the dewatering processes are shown, and the usage of electro-osmotic dewatering is focused to biomaterials such as sewage/activated sludge, waterworks sludge, food processing products and wastes, and biomass sludge. …

The feasibility of using Fe 0 /S 2 O 8 2− conditioning (zero valence iron (ZVI)/persulfate (ps)) integrated with horizontal electro-dewatering (HED) to improve the dewaterability of activated sludge (AS) was evaluated. The removal and migration of free and bound water in the ZVI/ps–HED process were determined, along with the organic …

By comparison, an increase of applied voltage was more effective for electro-dewatering process of sludge C but at the expense of higher energy consumption, while sludge A and B were more inclined to improve the electro-dewatering effect by extending the dewatering time. ... {2022}, volume={40}, pages={213 - 225}, url={https://api ...

During electro-dewatering, protein-like and tryptophan-like substances are released from the sludge in large quantities, as evidenced by the disappearance of peaks A, B and C in the figure (Fig. 7 II, IV). The peaks appearing in TB-EPS were both associated with humic acid which is an important factor in filtration resistance [49]. Therefore ...

The application of a low electric field through the sludge segment, called electro-dewatering, is considered to improve the liquid–solid separation, resulting in low …

Electro-dewatering technology (EDW) exhibits promising prospects for oily sludge reduction treatment, owing to its remarkable dewatering efficiency. Unlike conventional oily sludge dewatering methods, EDW eliminates the need for chemical additives, mitigating the risk of secondary contamination. This study comprehensively …

Yu Zhang, Guanghu Lian, Chunying Dong, Meiqiang Cai, Zhijun Song, Yuejing Shi, Liguang Wu, Micong Jin, Zongsu Wei, Optimizing and understanding the pressurized vertical electro-osmotic dewatering of activated sludge, Process Safety and Environmental Protection, 10.1016/j.psep.2020.05.016, (2020).

The unidirectional direct current (DC) electric field has been commonly used for electro-osmotic dewatering. Theoretically, periodic reversals in the direction of the electric current, and thus, the electro-osmotic flow, eliminate the zeta-potential gradient and restore the high value of the zeta potential near the anode, thereby restoring the electro …

2020, Pages 163-225. ... The impact of pH on electro-dewatering was related to the surface charge of the particles measured as zeta-potential. One of the differences between electro-dewatering and mechanical dewatering technologies is that electro-dewatering actively removes ionic compounds from the sludge. In this study, dissolution and ...

The study was conducted to evaluate the impact of pressure-driven electro-dewatering (EDW) on improving sludge characteristics related to disposal in agriculture, including biological stability, pathogen availability, heavy metals concentrations and nutrients content. ... 225–234. polyelectrolytes. Desalination 2008, 227(1–3), 103–110. ...

Compared to conventional dewatering techniques, electrical assisted mechanical dewatering, also called electro-dewatering (EDW) is an alternative and an effective technology for the dewatering of sewage sludge with low energy consumption. The objectives of this study were to evaluate the dewatering …

Electro-Dewatering Northwest WRF 14% 23% 21% ---- 39% South WRF 13% 20% 17% 14% 37% Eastern WRF 15% 21% 20% 17% 43%. Polymer Consumption Pounds Active ... kWh per Ton Centrifuge Screw Press Electro-Dewatering Northwest WRF 98 14 225 South WRF 53 6 265 Eastern WRF 92 14 163. Implications for Orange County Utilities Dry …

Electro-dewatering (ED) is an attractive technology for enhancing dewaterability of waste activated sludge (WAS), and the distribution and composition of EPS and secondary structure of extracellular protein in sludge has a great influence on the sludge dewaterability. Therefore, in order to optimize and regulate sludge ED process, it is ...

When 35 V voltage was applied for sludge electro-dewatering, it can directly reduce the water content to about 55 wt% within 15 min, and then air-drying to 20 wt% water content took about 100 min ...