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alternative waste treatment Applications

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    SSI builds shredding systems for alternative fuels processing

    SSI has been designing and manufacturing size reduction systems to prepare solid wastes for thermal treatment or conversion to alternative fuel. SSI has supplied hundreds of systems worldwide for generating energy from many different waste materials—from industrial, municipal, and hazardous wastes to tires, mill waste, wood and other organic materials.

    By SSI Shredding Systems, Inc. based in Wilsonville, OREGON (USA).

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    Waste recovery for petrochemical wastes

    Traditionally, the Petrochemical Sector has operated with basic technological solutions, with ultimate reliance on High Temperature Incineration (HTI) and landfill in order to deal with their hazardous wastes. However, tightening regulation, increasing landfill costs and social responsibilities are driving companies to look at alternative methods of treatment of very challenging wastes, including the treatment of:

    By Tetronics (International) Limited based in Swindon, UNITED KINGDOM.

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    Industrial air pollution control for the recycling and waste management

    Due to the continuous rise in the waste volumes worldwide it is essential constantly to seek alternatives to landfills and waste incineration: one suitable approach is bio-mechanical waste treatment. Apart from waste management, applications for air purification systems in this field range from soil remediation to sewage sludge drying in waste water treatment, as well as to the recycling of resources and their possible re-introduction.

  • Waste water respirometry solutions for toxicity reduction tests

    In industrial manufacturing companies, before a new process comes on-line, it is important to measure the toxicity of the effluent stream. This is especially the case for companies who treat their own waste. From the toxicity value (EC50) obtained, it may be a cost-effective solution to simply discharge the effluent to the treatment works at a slow and defined rate to minimise damage to the activated sludge. Following a period of acclimatisation it is often possible to increase feed rates to the plant and this can again be managed using the Strathtox Respirometer. An alternative approach is to undertake toxicity reduction procedures, such as neutralisation or acid hydrolysis, in pilot-scale laboratory studies. The Respiration or the Nitrification Inhibition Test may be used for this. In the future, toxicity reduction may be stipulated by local authority, water company or publicly-owned treatment works prior to giving discharge consents. Toxicity reduction may be evaluated using toxicity tests on activated sludge provided by the treatment works.

    By Strathkelvin Instruments Ltd. based in Motherwell, UNITED KINGDOM.

  • Headworks Odor and Corrosion Control Using Hydrogen Peroxide

    Hydrogen Peroxide typically controls odors and corrosion at treatment plant headworks by direct oxidation of hydrogen sulfide (H2S) within the wastewater. In the direct oxidation mode, H2O2 is applied to the wastewater 5-30 minutes prior to the point where the odors are being released, generally as the wastewater line enters the plant boundary. The efficiency of hydrogen peroxide treatment depends upon the available reaction time, the level of iron in the wastewater (reaction catalyst), wastewater pH and temperature, and the initial and target levels of H2S odor. Under optimal conditions, effective dose ratios are 1.2 - 1.5 parts H2O2 per part dissolved sulfide, and can be reliably estimated through beaker tests. H2O2 + H2S → S0 + 2H2O Frequently, control of odors through the primary clarifiers is wanted. In such case, the mechanism of control is both direct oxidation of H2S (as it rises from the solids blanket), and prevention of odor generation (by supplying dissolved oxygen). Control is typically achieved with a booster dose of 1-2 mg/L H2O2 added to the clarifier influent. Higher doses or alternate modes of addition may be required in cases where: 1) hydraulic retention times are > 2-3 hours; 2) solids blanket depths are > 1-2 feet; 3) soluble BOD levels are > 200-300 mg/L; or 4) waste activated sludge is co-settled with the primary solids. 2H2O2 → O2 + 2H2O

    By USP Technologies based in Atlanta, GEORGIA (US) (USA).

  • Material handling equipment for utilities industry

    Electric Power Generation, Fossil Fuel Electric Power Generation, Biomass, Alternative Fuels, Sewage Treatment Facilities, Waste Management and Remediation Services, Waste Treatment and Disposal, Solid Waste Combustors and Incinerators, Remediation Services, Materials Recovery, Facilities Waste Treatment and Disposal, Solid Waste Combustors and Incinerators, Remediation Services.

    By TerraSource Global based in St. Louis, MISSOURI (USA).

  • High-calcium lime slurry for environmental reclamation industry

    Lime slurry can be easily applied to rough terrain with a fine spray, minimizing waste and dust migration while providing a much safer, cost effective alternative. Flue gas treatment for industrial facilities and hazardous waste incinerators.

    By Sudbury Lime Ltd. based in Copper Cliff,, ONTARIO (CANADA).

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