Abstract. 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 ...

Sludge dewatering can effectively reduce the volume and mass of sludge for subsequent treatment and disposal. The work validated the potential of Fenton's reagent combined with dodecyl dimethyl benzyl ammonium chloride (DDBAC) in improving sludge dewaterability and proposed the mechanism of joint conditioning. The composite …

The difficulties in sludge dewatering can be related to the high organic content and colloidal matters in it, the high compressibility of sludge cake, and the high hydrophilicity of EPS. 16 In order to improve the sludge dewatering, it is a prerequisite to choose the proper sludge conditioning methods. Various methods of pretreatment are ...

interactions and improved dewatering behaviour of smectite clay [2] E.A. Smith, S.L. Prues, F.W. Oehme, Environmental degradation of dispersions, International Journal of Mineral Processing 75 (2005) polyacrylamides, …

To improve the dewatering performance, various methods have been developed, such as Fenton treatment (Liang et al., 2015), microwave irradiation (Liu et …

Abstract and Figures. In order to improve the dewatering rate and the effect of fine clean coal (FCC), the advanced method of fine coal (−0.5 mm) dewatering and the correlated basic theory were ...

A dewatering process combining the mechanical expression with the heating treatment of space solid waste is proposed in this paper. Temperatures of 130–180 °C and a mechanical load of 0–8 MPa were employed on the drying behavior of space solid waste and product distribution with a self-designed hot press experimental setup.

Similarly, the dewatering behavior was improved at higher polymer molecular weight. In addition, it was found that the flocculation performance was adversely affected by an increase in the degree of polymer hydrolysis which, in turn, increases the ratio of carboxylic to amide functional groups in the polymer chain. Polymer C (nonionic approx.0 ...

The PVEOD process is to apply an electric field during the conventional pressurized dewatering of sludge to improve the separation process, reduce energy consumption, increase the final dry solids content of the sludge, and accelerate the sludge dewatering kinetics (Olivier et al., 2014; Iwata et al., 2013; Feng et al., 2014).

tailings dewatering, density and shear strength, and maintaining a safe, stable and non-polluting tailings storage (see Box 1). Box 1: Limitations of the NPV Approach The use of NPV and an artificially high Discount Factor result in apparent cost savings in tailings management in the short-term, but at the price

The effect of shear on dewatering behaviour and particle interactions of Na-exchanged smectite and kaolinite clay dispersions has been investigated at pH 7.5, using hydrolysable Ca(II) and Mn(II) ions as coagulants and high molecular weight anionic and non-ionic polyacrylamide (PAM A and PAM N, respectively) and polyethylene oxide …

The authors are convinced that improved knowledge of tissue dewatering mechanisms, forming, and material transport during and after TAD dewatering can increase the efficiency of the industrial ...

The dewatering of MMT-based tailings by centrifugation was also reported by Nguyen and co-workers [16]. They found that the settling rate and dry solid content were improved to 98.6% and 61.1%, respectively, due to neutralization of clay surface charge and increased agglomeration of particles after addition of cations and flocculant.

Optimum metal ion-mediated flocculation conditions were established and linked to the dispersion properties and dewatering behavior for improved tailings settling and consolidation under industrially relevant conditions. Metal ion and polymer adsorption behavior was correlated with the interfacial chemistry, monitored through the zeta …

An improved method for high-efficiency coal mine methane drainage: Theoretical analysis and field verification. Energy Sci. Eng. 6, 739–748 (2018). Article CAS Google Scholar

Sludge after thickening is usually conditioned to improve sludge dewatering performance. Sludge conditioning can be divided into three types: chemical, physical, and biological conditioning ... However, a rheological behavior description of sewage sludge remains a scientific challenge. It is significant to simulate the drying process in a ...

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.

The influence of hydrolyzable metal ions (Mn(II) and Ca(II)) adsorption on the surface chemistry, particle interactions, flocculation, and dewatering behavior of kaolinite dispersions has been investigated at pH 7.5 and 10.5. Metal ion adsorption was strongly cation type- and pH-dependent and significantly influenced the zeta potential, anionic …

Similarly, the dewatering behavior was improved at higher polymer molecular weight. In addition, it was found that the flocculation performance was adversely affected by an …

Adding Ca 2+ to improve dewatering efficiency is common in operations with tailings containing montmorillonite [29]. ... Interfacial chemistry, particle interactions and improved dewatering behaviour of smectite clay dispersions. Int. J. Miner. Process., 75 (2005), pp. 155-171. View PDF View article View in Scopus Google Scholar

The dewatering behavior was determined by filtration velocity, moisture content and resistance of cake using a vacuum filtration cell. ... CTAB significantly improved the slime surface hydrophobicity with the contact angle increasing to 90.5°, and reduced the filtrate surface tension to 35.26 mN/m. However, APAM decreased the absolute value of ...

The difficulties in sludge dewatering can be related to the high organic content and colloidal matters in it, the high compressibility of sludge cake, and the high hydrophilicity of EPS.16 In order to improve the sludge dewatering, it is a prerequisite to choose the proper sludge conditioning methods. Various methods of pretreatment are ...

Abstract. This study established a Fe 2+/persulfate oxidation system to dewater sludge in WWTPs. Dewatering performance, persulfate consumption and the …

Sludge acidification is a popular and efficient pretreatment method for improving sludge dewaterability. To explore the mechanisms of sludge acidification deeply and provide a theoretical basis for practical application, sewage sludge was repeatedly treated by acidification conditioning. The sludge pH was continuously adjusted from 7.0 to 3.0, then …

Recent smectite dewatering studies have shown that improved consolidation may be achieved through "controlled dispersion," whereby the Na-smectite clay is dispersed in 0.02–0.05 M solutions of divalent metal ions (e.g., Ca(II), Mn(II)) [5], [6], [7].

The superabsorbent dewatering behaviour of dilute and concentrated refractory gold ore slurries was investigated. The slurries displayed better SAB-mediated dewatering performance, in terms of reduced processing time, volume minimization and greater water recovery for recycle, in comparison with gravity thickening.

The cathodic DOM concentration negatively correlated with electro-osmotic dewatering behavior at the cathode side. ... It was found that electro-dewatering properties were improved by raising the operating voltage or decreasing the pH value, while dewatering rate initially increased at low ionic strength it decreases with increased ionic ...

The dewatering behavior over all pressure zones will be improved, thus increasing the operational stability of the screw press. REFURBISHMENT The screw shaft is very much subject to wear and needs to be reconditioned on a regular basis. One option is refurbishment of the screw shaft as follows: • Cutting off the screw flights and

Abstract. This work focused on dewatering performance and heavy metals (HMs) transformation during waste activated sludge (WAS) treatment by employing …

Wojciechowska [6] observed that microwaving improved sludge dewaterability and the effects depended on the sludge type. He also found that after 180 s of microwave heating, specific resistance to filtration (SRF) of mixed sludge (primary and secondary sludge) and anaerobically digested sludge decreased to 73% and 84%, …