· Coconut shell is a bio-waste, and its availability is high to waste in the coastal region of Karnataka, India. The present study focused on using coconut shell biochar modified with ferric chloride to enhance the sludge dewaterability, and it is evaluated experimentally (Capillary suction time, moisture content, settleability, zeta potential,
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· Biochar is a widely available carbon-based material that has been used for soil remediation and sewage treatment. However, in recent years, biochar has received more attention as a conditioning agent to improve the dewatering performance of sewage sludge. The sludge from the secondary sedimentation tank of wastewater treatment
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DOI: 10.1016/j.jenvman.2023.118287 Corpus ID: 259029460 Behavior of heavy metals in municipal sludge during dewatering: The role of conditioners and extracellular polymeric substances. @article{Guo2023BehaviorOH, title={Behavior of heavy metals in municipal
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· To investigate the flow of each elements, the quality of heavy metals in 100 mL of sludge sample (i.e., raw sludge, MCCP-sludge, and MCCP&SBB-sludge) was displayed (Tables S4–S9). Meanwhile, to verify the accuracy of the experiment, the total amount of each heavy metal obtained through digestion was compared with that of the
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Products Processes Wastewater treatment Emulsion breaking Sludge dewatering Solid-liquid separation Heavy metal precipitation Oil sludge dewatering COD reduction AOX – treatment Soil washing Wash water treatment Decolourization Processing of recovered paper Trash catching Defoaming Retention Sedimentation acceleration
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Acid Mine Drainage: Sludge Dewatering, Metal Recovery and Synthesis of Magnetite Nanoparticles Xinchao Wei Acid mine drainage (AMD) is one of the significant
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· Even the addition of these metal salts to the sludge also minimized the CST, TTF, and MC, thus improving its dewatering. Moreover, a notable SRF decrease from 11.30 × 10 12 m/kg to 3.90 × 10 12 m/kg was achieved using PACl as a flocculant to treat a biological sludge [ 42 ].
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Behavior of heavy metals in municipal sludge during dewatering: The role of conditioners and extracellular polymeric substances.
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Acid mine drainage (AMD), formed during present mining activities or at abandoned. mine sites, causes environmental problems that can negatively impact ecosystems and human. health, due to its low pH, high acidity, elevated concentrations of metals or metalloids, and high. sulfate content.
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· This study systematically compared the performance of five corrosion-resistant electrode materials for electro-dewatering. Through a comprehensive analysis of dewatering efficiency, energy consumption, and corrosion resistance, conductive plastic composite electrodes (EKG) were selected as the optimal electrode material for
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· Increasing the content of PN in EPS could improve the distribution of heavy metals in municipal sludge, and improve the dewatering process. Therefore, PN (e.g., amylase or protease) could be used as an environmentally friendly metal ion adsorbent and deoxidizer for sludge dewatering.
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· Electro-dewatering of sewage sludge with pulsating direct current (PDC-dewatering) was conducted to investigate the effects of pulsating frequency (0.01-60 Hz) and duty cycle (DTC) (20-100%) on
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· Dewatering and drying technology play significant roles in minimizing sludge volume, facilitating transportation, increasing calorific value and reducing the leachate production in landfill sites. Various new technologies are emerging and existing ones are always evolving because of sharp growth of sewage sludge in the last decade.
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· In this work, heat-activated peroxymonosulfate (heat-PMS) oxidation was used to condition waste activated sludge. The results showed that the optimal temperature and PMS dosage for sludge dewatering were 75 °C and 150 mg/g-volatile solids (VS), and the addition of rice husk (100–400 mg/g-VS) was favorable to further enhance sludge
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· Previous studies have confirmed that steel slag and red mud can help improve sludge dewatering performance [10] [11][12], but there are few studies on the pyrolysis of sludge cake containing large
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· The principle methods of mechanical dewatering of sludge are centrifuges and filter presses. The mechanical sludge dewatering with filter presses guarantees more efficient volume reduction. If the cake dryness rates of centrifuges and filter presses are compared, the dryness rate of filter press is two times higher on average
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1. Affiliation. Extracellular polymeric substances (EPS) play an important role in reducing moisture content and removing heavy metals from municipal sludge. In this study, cetyl
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: Boran Wu, Xiaohu Dai, Xiaoli Chai · Electro-dewatering of steel industrial sludge: Performance and metal speciation. Rui Zeng, Yiming Li, +2 authors. Shuting Zhang. Published in Journal of
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· addition was proposed for simultaneous heavy metal removal and sludge dewatering. The environmental risks of heavy metals were significantly reduced with the hybrid conditioning process, with high removal efficiencies of
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· FeCl3, quick lime, and cationic polyacrylamide (CPAM) were used for excess sludge conditioning from wastewater treatment plant (WWTP) and the dewatering performance by different chemical conditioners was investigated. Experimental results showed that FeCl3 could make small and concentrated sludge particles. Furthermore,
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· Municipal sludge is an inevitable byproduct during the treatment of wastewater, which is produced by sewage treatment plants in urban residential areas, and it contains pathogens, heavy metals, and other pollutants. Municipal sludge is suitable for application in energy utilization because of its high organic content and relatively low
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· Transformation, leaching toxicity and environmental risk of heavy metals in sludge during dewatering were determined. Results demonstrated that after treated by Fe 2+ /persulfate oxidation system with 0.6 mmol/g–VS of persulfate at Fe 2+ /persulfate molar ratio 0.6, WC decreased to 53.5% and SCST increased to 4.15, which implied an
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Municipal sludge dewatering properties and heavy metal distribution: Effects of surfactant and hydrothermal treatment. Science of the Total Environment ( IF 9.8 ) Pub Date : 2019-12-30 , DOI: 10.1016/j.scitotenv.2019.136346
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· This study compared different AOPs (Fe(II)-Oxone, Fe(II)-H 2 O 2, and Fe(II)-NaClO) for sludge dewatering and characterized organic components and the migration of heavy metals. Particularly, the characteristics of organic components were analyzed with two-dimensional correlation spectroscopy (2D-COS) and the ultrahigh
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Inorganic coagulants are essential agents that can facilitate the sludge deep dewatering, but comprehensive comparative research of commonly used coagulants is lacking. The systematic comparison of six coagulants, including Ferric Chloride (FeCl 3), Polymeric Ferrous Sulfate (PFS), Ferrous Sulfate (Fe 2 (SO 4) 3), Aluminium Chloride (AlCl 3),
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25YD Dewatering Roll-Off Box. 30YD Dewatering Roll-Off Box. 25YD Dewatering Metal Lid Box. Our Dewatering Boxes Provide: Floor grid with 3/16″ x 1″ galvanized bar grating for a long life and low maintenance. 84″ x 240″ grid area. 3 3/4″ x 1″ grid opening. Sump height of 13″ above floor (approx. 1100 gal.)
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Soluble metal ions migration and distribution in sludge electro-dewatering. Hang Lv, Siqi Xing, +4 authors. Xu Wu. Published 28 October 2019. Materials Science, Engineering.
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· The mass specific energy consumption was reduced from 350.08 to 295.88 kWh per ton sludge by means of piecewise voltage electro-dewatering method. This study provided insights into the soluble
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· Characteristics of dewatered sludge. Dewatering processes can potentially remove both the free water and a proportion of the interstitial (or floc) water. The dewatered sludge, or cake, %DS content can range from 13−46% depending on the feed sludge characteristics and the dewatering technology employed (Table 1).
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· By understanding how sludge dewatering agents like PAC, PFS, and Fe/PMS affect the aging of PLA-MPs, Aging mechanism of microplastics with UV irradiation and its effects on the adsorption of heavy metals J. Hazard Mater., 393 (2020), Article 122515
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