ash treatment Articles

  • Case study - Plant for ash treatment, Singapore

    Engineering and planning, procurement, production and delivery of the complete plant engineering as well as installation and commissioning. The contained metal elements are removed from the slag. The metal-free slag is used as building material for a new island. Customer: Remex Mineralstoff GmbH Retention: August 2014 ...


    By Eggersmann Anlagenbau

  • Fly Ash Treatment – Plasma Torches versus Graphite Electrodes

    Background Plasma generating devices have to be designed to tolerate incredibly harsh conditions during operation and in particular very high heat loads and temperatures around the arc. However, when used in the vitrification of highly chlorinated materials the challenge is even greater than in other applications. The combination of high ...

  • Arsenic removal from water using a novel amorphous adsorbent developed from coal fly ash

    A novel effective adsorbent of alumina/silica oxide hydrate (ASOH) for arsenic removal was developed through simple chemical reactions using coal fly ash. The iron-modified ASOH with enhancing adsorption activity was further developed from raw fly ash based on the in situ technique. The adsorbents were characterized by X-ray diffraction, Fourier transform infrared spectrometry, scanning ...


    By IWA Publishing

  • Prevention of dioxins de novo formation by ethanolamines

    Abstract Two inhibitors, triethanolamine (TEA) and monoethanolamine (MEA), were tested for their ability to prevent the de novo formation of polychlorinated dibenzo- p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) on sinter plant fly ash. The amounts of both PCDDs and PCDFs, formed by thermal treatment of the fly ash, decreased when inhibitors were added. Up to 90% reduction of the ...


    By Springer-Verlag GmbH

  • Air bubble and oil droplet interactions in centrifugal fields during air-sparged hydrocyclone flotation

    The interactions of air bubbles and oil droplets in centrifugal flotation have been considered with respect to process conditions present during Air-sparged Hydrocyclone (ASH) flotation. Encounter efficiency of oil droplets with air bubbles has been found to be significantly smaller when compared to encounter efficiency of mineral particles. Collision and sliding contact times have been ...


    By Inderscience Publishers

  • Pyrolysis of low-density polyethylene using synthetic catalysts produced from fly ash

    Catalytic pyrolysis of low-density polyethylene (LDPE) was investigated using various fly ash-derived silica–alumina catalysts (FSAs). FSAs were prepared by a simple activation method that basically includes NaOH treatment of fly ash by a fusion method, followed by an aging process. A series of LDPE pyrolysis experiments was conducted and the catalytic performance of FSAs was assessed in terms of ...


    By Springer-Verlag GmbH

  • Low cost treatment of wastewater containing mercury salts

    Removal of mercury from wastewater is of considerable significance from an environmental point of view. Treatment of wastewater containing mercury salts has been carried out with the help of modified fly-ash bed. The preparation of the bed material has been described. The effects of different parameters such as pH, exchange capacity and the presence of other constituents have been studied. ...


    By Inderscience Publishers

  • Estimation of Ascaris lumbricoides egg inactivation by free ammonia treatment of ash-amended UDDT vault products using stored urine in Uganda

    Urine-diverting dry toilets (UDDTs) are designed to recover nutrients and organic matter from human excreta for use as agricultural amendments, and have been promoted in many developing countries, including Uganda. Wider UDDT implementation could help address problems in areas where water scarcity limits sanitation coverage and/or declining soil fertility jeopardizes growing populations’ ...


    By IWA Publishing

  • Dewatering bin carryover study

    Bottom ash dewatering bins (hydro-bins) at coal fuel utility plants allow ash material to carry over to ash settling ponds, or in the case of closed loop systems, re-circulate suspended ash solids, resulting in the following problems: Frequent and expensive dredging of settling ponds Excessive wear on system components caused by re-circulating suspendedsolids Labor intensive manual ...


    By Entech Design, Inc.

  • Management of sewage sludge and ash containing radioactive materials

    Approximately 50% of the seven to eight million metric tonnes of municipal sewage sludge produced annually in the US is reused. Beneficial uses of sewage sludge include agricultural land application, land reclamation, forestry, and various commercial applications. Excessive levels of contaminants, however, can limit the potential usefulness of land-applied sewage sludge. A recently completed ...


    By Inderscience Publishers

  • Domestic wastewater treatment with CEPT-wetlands process

    This study aimed to develop an effective process with less construction and operation cost and with flexibility of meeting different temperature requirements, namely CEPT-construted wetland processes. To reduce the chemical cost for the CEPT process, fly ash was firstly utilised to develop an efficient compound coagulant. The lab-scale experimental results showed that with low Fly Ash Coagulant ...


    By Inderscience Publishers

  • Fly ash washing wastewater+ Leachate Concentrate Treatment Project

    Application: Fly Ash Washing Wastewater / Leachate Concentrate Scale: 200 tons / day of Fly Ash Washing Wastewater, 600 tons INTRODUCTION Scale: 200 tons / day of fly ash washing wastewater for incineration power plants + 600 tons / day of concentrated leachate Process: DTRO Project time: ...

  • Effects of environmentally realistic daily temperature variation on pesticide toxicity to aquatic invertebrates

    Toxicity of several agricultural chemicals to aquatic invertebrates has been shown to be temperature dependent, but the role of daily temperature variation has rarely been examined. We simulated a natural daily temperature pattern (a fluctuating cycle of 21 to 31 °C over a 24 h period) based on field‐collected data from Southern High Plains wetlands and have conducted a series of experiments ...


    By John Wiley & Sons, Ltd.

  • Chemical production and characterisation of activated carbon from waste 'coffee grounds'

    Activated carbon was prepared from ground–coffee in this study. Experimental results reveal that for the ratio (0, 1 ÷ 0, 3) of coffee grounds to activating agents (ZnCl2, H3PO4) has not noteworthy influence. The rise temperature and carbonisation time respectively, in the interval of 500–700°C and ...


    By Inderscience Publishers

  • Dog Food Processor Wastewater Case Study

    Pet Food Industry Wastewater Treatment Dog Food Processor A dog food processing facility was using ferric chloride and an anionic polymer to treat their wastewater using an Air Sparged Hydrocyclone ...


    By Integrated Engineers Inc.

  • Removal of phosphorus from wastewaters by biomass ashes

    Removal batch assays of phosphates from a synthetic wastewater (SWW) and a pulp and paper mill wastewater (PPWW) with two forestry biomass ashes were performed. The supernatants were not only chemically characterized but also the ecotoxicity was determined using two organisms: Vibrio fischeri and Artemia franciscana. The addition of fly ash and bottom ash to the SWW in ...


    By IWA Publishing

  • Modern water`s toxicity monitor used for river clean-up research case study

    Modern Water pic (AIM:MWG), the owner of leading water technologies for the production of fresh water and monitoring of water quality, has collaborated with the Unwersity of Central Florida (UCF) to supply a Microtox® M500 toxicity monitor. The monitor will assist with research into acVanced treatment techniques which could provide a solution to the removal of Total Phosphorus from the Middle ...

  • Evaluation of producing fuel and chemicals from corn stover pre-treated with flue gas

    Production of fuels and chemicals from corn stover is currently at the economic crossroads. Two problems, low yield and high cost, need to be resolved. One of the solutions to these problems is to improve digestibility of corn stover by using cheap chemicals. This paper explores the possibility of developing a low-cost corn fibre pre-treatment method with SO2 and fly ash in flue gas. An ...


    By Inderscience Publishers

  • Construction materials production. Application of the ABC-100 unit

    Expanded clay industry In the process of expanded clay production the argillous raw material homogenizes and mills in the drilling mud mixers and rollers. But these equipments not ensure qualitative desintegration. As result we obtain the expanded clay of low quality. Insufficiently desintegration and homogenizing of raw materials lead to the result when even 3% of carbonate ...


    By GlobeCore GmbH

  • Precipitation of heavy metals from coal ash leachate using biogenic hydrogen sulfide generated from FGD gypsum

    Investigations were undertaken to utilize flue gas desulfurization (FGD) gypsum for the treatment of leachate from the coal ash (CA) dump sites. Bench-scale investigations consisted of three main steps namely hydrogen sulfide (H2S) production by sulfate reducing bacteria (SRB) using sulfate from solubilized FGD gypsum as the electron acceptor, followed by leaching of heavy metals (HMs) from coal ...


    By IWA Publishing

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