Chemical Waste Articles

  • Operation of an anaerobic filter compared with an anaerobic moving bed bioreactor for the treatment of waste water from hydrothermal carbonisation of fine mulch

    This experimental study investigates the anaerobic digestion of waste water from hydrothermal carbonisation of fine mulch (wood chips) in combination with a co-substrate for the first time. Two anaerobic reactors, an anaerobic filter (AF) and an anaerobic moving bed bioreactor (AnMBBR), were operated over a period of 131 days at mesophilic conditions. The organic loading rate was increased to ...


    By IWA Publishing

  • Influence of chemically enhanced primary treatment on anaerobic digestion and dewaterability of waste sludge

    To lower energy consumption at a sewage treatment plant (STP), primary settling could be enhanced to direct more chemical oxygen demand (COD) to anaerobic digestion (AD) for increased biogas production and decreased aeration. Primary settling can be chemically enhanced by applying flocculation aids (FAs). FAs are refractory compounds that may affect all sludge treatment facilities. In this ...


    By IWA Publishing

  • A prototype of novel agro-waste based column bed device for removal of textile dye Optilan Red

    The aim of the study was to assess the potentiality of an agro-waste (sugarcane bagasse) for removal of the textile dye (Optilan Red) using novel column based filtration unit with a packed column of chemically treated sugarcane bagasse. The treated and untreated sugarcane bagasse (biosorbent) were characterized by Fourier transform infrared (FT-IR) spectroscopy. Effect of initial dye ...


    By IWA Publishing

  • Online Chemical Oxygen Demand for Treatment Optimization - Case Study

    A wide variety of products are made in the chemical and pharmaceutical manufacturing industries, that require large volumes of chemicals, materials, and substances that are used throughout process operations. Waste water from these facilities typically include contaminants, toxins, nutrients, and organic content that presents challenges with regards to treatment. A major UK based chemical ...


    By MANTECH Inc.

  • Case study - Perstorp Speciality Chemicals AB,Perstorp, Sweden

    Customer: Perstorp Speciality Chemicals AB,Perstorp, Sweden Project: Chemical Waste Incinerator operating WESP Perstorp AB started up their Chemical Waste Incinerator year 2007. The emission standard to meet stated < 5 mg/Nm3. With a standard as low as 5 mg the natural choice ended up in a WESP. Result The plant has operated ...


    By Envibat AB

  • Perfectly clean water without the use of chemicals - Waste Water - Case Study

    Wastewater treatment plant successfully cut down costs and environmental impact Thanks to the disinfectant system from Danish Clean Water, the Danish wastewater treatment plant Fredericia Spildevand is now saving yearly 75.000 € and reusing 70,000 m3 wastewater for cleaning – saving both money and drinking water. The employees at Fredericia Spildevand were quite ...


    By Danish Clean Water A/S

  • Removal of methylene blue by adsorption on aluminosilicate waste: equilibrium, kinetic and thermodynamic parameters

    An aluminosilicate waste (AW) was investigated as adsorbent for methylene blue (MB) dye. AW was characterized by petrography, X-ray diffractometry, X-ray fluorescence, scanning electron microscopy, thermogravimetry and zeta potential measurements. It was found that AW contains kaolinite, and other minor components such as quartz, muscovite, smectite, siderite, pyrite and organic compounds. The ...


    By IWA Publishing

  • Treatment of textile industry effluents using orange waste: a proposal to reduce color and chemical oxygen demand

    Various agricultural residues have been tested as biosorbents due to their low cost, high surface area, and favorable surface chemistry. In this work, a sweet orange albedo was tested as a biosorbent for treatment of real textile effluents. The orange albedo powder was prepared by drying the residue at 50 °C and milling to 30 mesh, and then used for dye adsorption from a alkaline (pH = 10.71) ...


    By IWA Publishing

  • Treatment of antimony mine drainage: challenges and opportunities with special emphasis on mineral adsorption and sulfate reducing bacteria

    The present article summarizes antimony mine distribution, antimony mine drainage generation and environmental impacts, and critically analyses the remediation approach with special emphasis on iron oxidizing bacteria and sulfate reducing bacteria. Most recent research focuses on readily available low-cost adsorbents, such as minerals, wastes, and biosorbents. It is found that iron oxides ...


    By IWA Publishing

  • Recovery of Ruthenium and Other PGMs from Spent Petrochemical Catalysts - Case Study

    The recovery of platinum group metals from spent petrochemical catalysts has economic benefits by the protection of the supply chain of these valuable and rare metals, thereby helping to create a sustainable value chain in the petrochemical industry for catalysts. Introduction The platinum group metals (PGMs) are used extensively in catalysts for the petrochemical industry owing to ...

  • Anaerobic treatment of food waste in pilot scale

    For this work, a pilot scale anaerobic digester was used to assess the treatability of food waste from a canteen. The digester was operated for 720 days, and its efficiency in removing organic matter and suspended solids as well as producing biogas were assessed. At the beginning of operation, the digester failed and alkalinity buffering was required until stabilization. A maximum chemical ...


    By IWA Publishing

  • Seattle, WA - Active chemical distribution facility - Case Study

    Guaranteed Remediation of TCE and PCE under Active Facility Project Summary TRS Group, Inc. (TRS) working with FLOYD|SNIDER a local Seattle consulting firm, completed a guaranteed fixed price remediation (GFPR) of tetrachloroethene (PCE) and trichloroethene (TCE) in soil at an active bulk chemical warehouse and distribution facility in Seattle, Washington. ...


    By TRS Group, Inc.

  • Olive mill effluent depuration by ozonation and Fenton processes enhanced by iron wastes

    The aim of the present work was to compare the potential of iron industry wastes to enhance ozone and hydrogen peroxide action on the degradation of olive mill wastewaters (OMWs). The results attained show a higher efficiency for ozonation using a lower catalyst load. Nevertheless, Fenton's process led to a larger amount of chemical oxidation demand (COD) removed per mole of oxidant applied. ...


    By IWA Publishing

  • Renewable chemicals, nomenclature, and TSCA: what you need to know to commercialize

    Richard E. Engler, Ph.D, Senior Chemist with B&C and advisor to BRAG, delivered an instructive and practical session for biobased product stakeholders at the American Chemical Society Green Chemistry and Engineering Conference on July 16, 2015, covering what TSCA regulates, how the TSCA Inventory works, key nomenclature issues for chemicals ...


    By Bergeson & Campbell, P.C.

  • Sludge Treatment and Disposal Technologies

    Most wastewater treatment processes produce a by-product that purifies wastewater before it is released into local waterways. This by-product is named as sludge. Typically in solid, semi-solid or liquid state, it is in fact an amalgamation of all the liquid wastes that are discharged by domestic houses, commercial properties, industry, and/or agriculture after aerobic biological treatment. ...


    By IWA Publishing

  • Water treatment in Brazil

    The challenge Many factories in Brazil do not dispose their sewerage in a professional way. Only big enterprises use facilities to treat their industrial waste water, whereas numerous small and medium-sized enterprises convey their sewerage flow into rivers and brooks or pit drainages. This results in a significant environmental burden and endangers the health of the population. ...


    By EnviroChemie GmbH

  • A Quick Solution: Modular Waste Water Treatment

    Rust corrodes materials and may lead to impurities. As a result, there is a demand across most sectors for components that are protected against corrosion. Cantin SA, headquartered in Domdidier in Switzerland, specializes in the metalworking of rust-proof materials. The company produces complete products and individual components for many different sectors, from medical technology through the ...


    By EnviroChemie GmbH

  • Magnets: A viable alternative to flotation for sand producers

    Introduction The basic rudiments of mineral beneficiation have not changed for many years. The techniques have been improved, but are still essentially the same, using either a materials weight, density, shape or magnetic susceptibility to enable separation. For removing impurities from non-metallic minerals, such as silica sand, typical methods include Flotation, Gravity and Magnetic ...


    By Eriez Magnetics Europe Ltd

  • Ekokem offers a turnkey solution case study

    The operations of the pharmaceutical company Orion are highly regulated. In order to ensure patient safety, the quality requirements for production and waste management are high. Orion's partner in waste management is Ekokem. Guidelines cannot be ignored Orion's research, product development and quality control laboratories utilise a wide range of chemicals. Waste ...


    By Ekokem Oy

  • Anshan steel company case study

    This case study illustrates the use of chilled water on a joint steel mill and petrochemical plant. Company Information Anshan Steel Company State Owned Anshan, Liaoning Province North-East China Background The Liaoning province has been home to a large industrial revolution over the last century. There are numerous coal mines, ...

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