Waste & Recycling Articles

  • Ammonia Emergency Plan Calls on Packed Tower to Scrub Released Chemicals,

    A few years ago Union Camp turned a corner.  Management decided that advance planning would take the place of reacting after the fact to an emergency or regulatory agency demands.  At Union Camp’s Dover, OH. facility, byproducts of the paper industry are converted into usable specialty chemicals for cosmetics, adhesives and other industries. Crystallization is a process used intensively ...


  • Emphasis Shifting to Toxicity Reduction

    Untitled Document Under the Clean Water Act (CWA), the U.S. Environmental Protection Agency (EPA) established the National Pollutant ...


    By Calgon Carbon Corporation

  • High technology comes to Hazardous waste disposal – Case Study

    Skyrocketing hazardous waste disposal costs for the USC/ Division, of C.R. Bard, Inc., Billerica, Massachusetts led them to a high technology solution. USC/, a medical products manufacturer that develops and produces angioplasty catheters, had seen its solid hazardous waste disposal costs rise to almost $500 per 55- ga/lon drum, excluding costs associated with inplant storage, handling, and ...


    By Waste Control Systems Inc

  • AOX and COD Removal From Landfill Leachates With Ozone And Radical Reactions

    The chemical oxidation with ozone is an innovative technology for the treatment of effluents which are contaminated with ...

  • Clay Lumps under Simulated Hydraulic Transport Conditions

    Laboratory experiments with compacted kaolinite-bentonite mixtures indicate that degradation of hydraulically transported clay lumps in a dredge pipeline can be predicted and controlled to some extent. The size reduction of these lumps depends not only on the length of the pipeline but also on the density of the clay being dredged, the plasticity index (PI) of the clay, and the velocity of the ...


    By ASTM International

  • Long-Term Filtration Behaviour of Soil-Geotextile System

    In addition to soil retention and permeability requirements for a geotextile filter, a geotextile should be able to function without having a significant number of its openings clogged. In order to evaluate the long-term filtration behaviour of a soil-geotextile system, a permeameter is developed in which both the long-term flow rates as well as the gradient ratio tests can be conducted ...


    By ASTM International

  • A New Apparatus for the Evaluation of Electro-Kinetic Processes in Hazardous Waste Management

    Possible uses of electro-kinetics for hazardous waste site remediation are being investigated. This paper describes a new apparatus which has been specifically designed, fabricated, and assembled to evaluate the viability, feasibility, practicality, and potential costs of these conceivable techniques experimentally. Results of studies on the existence of electro-osmotic flow in compacted clay and ...


    By ASTM International

  • Leach Tests on Lime-Treated Clays

    This paper describes the design, use, and results of a multiple leach-cell operation to test the changes in permeability and calcium removal of a lime-treated expansive clay under continuous water leaching. Seventy laboratory-prepared lime-treated clay specimens were subjected to continuous accelerated leaching for periods of 45 and 90 days with varying lime contents and compactive moisture ...


    By ASTM International

  • Effects of Back Pressure on Geotextile Transmissivity Tests

    To evaluate the effects of back pressure on the measurements of geotextile in-plane transmissivity, a new test device has been developed. A series of transmissivity tests were performed under back pressures ranging from 6.9 to 414 kPa. Results show that the influence of back pressure is significantly less than that caused by the variability among different specimens. However, to obtain repeatable ...


    By ASTM International

  • Turning biological waste treatment plant sludge into a fuel source

    North Carolina, as part of its landfill regulations, banned all waste treatment plant sludges from general landfills in March, 1989. Cranston Print Works Company was producing approximately 20 tons per day of 18% solid non-hazardous sludge in its extended aeration activated sludge waste treatment plant. Sludge disposal costs were $10,000 per week after the ban took effect. This paper traces the ...


    By Komline-Sanderson

  • Environmental management: An agenda for action

    A business agenda for sustainable development is described, where the main thrust is to be the manufacture of durable and recyclable goods by processes which minimize the production of waste and polluting emissions. This is to be achieved through education, research and innovation with a more open dialogue between producers and society.Keywords: recycling technology, sustainable development, ...


    By Inderscience Publishers

  • Laboratory Properties of a Soft Marine Clay Reinforced with Woven and Nonwoven Geotextiles

    This paper is concerned with the laboratory properties of a geotextile-reinforced compacted soft marine deposit with respect to its compaction, compressive strength, and time-dependent settlement characteristics. Two different geotextiles, namely, Polyfelt TS-500 (nonwoven) and Cardon SG PP 150 (woven) have been investigated. It was observed from the experimental study that a nonwoven geotextile ...


    By ASTM International

  • Use of Side Drains in Triaxial Testing at Moderate to High Pressures

    Side drains are used in triaxial tests to increase the rate of consolidation and equalize pore water pressures within the specimen. However, the efficiency of the side drains has been shown to be a function of time and effective confining pressure.This paper presents the results of (1) a mail survey on side drain practice, which indicates that many laboratories use side drains not recommended by ...


    By ASTM International

  • Compactor reduces waste handling, disposal cost for Furniture manufacturer case study

    S. Bent and Brothers Inc., a large New England furniture manufacturing company, has significantly reduced its hazardous waste handling and disposal costs by using a compaction machine built by Compacting Technologies International (CTI) of Portland, Ore. Roger R. LeBlanc, administrative assistant at S. Bent's Gardner, Mass., headquarters, reports tbat prior to installing the compactor in early ...


    By Waste Control Systems Inc

  • Crossflow Membrane Filtration High-Purity Water Systems

    INTRODUCTION As the electronics industry continues to provide us with such products as high resolution television, notebook size portable computers and cars with automatic navigation systems, it becomes necessary to produce semiconductors with finer device geometries to allow for efficient placement of more circuits per a given area. This requires increased control of a semiconductor's material ...

  • Use of anaerobic respirometers for measuring gas production in toxicity and treatability tests

    Introduction Anaerobic processes are used widely for stabilizing domestic sludges, treating industrial wastes, and converting biomass to methane. These processes frequently receive complex organic chemicals that are classified as being hazardous or toxic. Despite advances in our understanding of anaerobic reactions, there is limited information regarding the impact of toxic chemicals on the ...


    By Challenge Technology

  • Calibration of a Dynamic Penetrometer for Compaction Quality Control of Boiler Slag

    A dynamic penetrometer was designed for the purpose of evaluating compaction quality in fills constructed with boiler slag. Laboratory and field calibration tests were conducted to study the effect of densification on dynamic penetration resistance. The effects of specimen preparation method (pluviation and impact compaction) and saturation on dynamic penetration resistance were investigated in ...


    By ASTM International

  • Using Nanofiltration in Beverage Production

    The following article is based on a paper presented in August, 1990 at the 21st Annual Meeting of the Fine Particle Society in San Diego. Soft drink manufacturers, not to mention manufacturers of other beverage products, have always had a keen interest in the water that goes into their products. After all, it is the water that typically makes up 80%-90% of the product. In the past the water has ...

  • Design, Construction, and Testing of a Large-Scale, Radial Fracture Flow Model

    Materials and procedures used in previous laboratory studies of flow in fractures were reviewed. Based on this review, a 3-m-high by 1.5-m-diameter cylindrical radial flow model with a single horizontal fracture was designed and constructed out of concrete. The fracture was created by placing a sheet of geotextile between the top and bottom halves of the cylinder during pouring of the concrete. ...


    By ASTM International

  • Influence of Soil Structure on the Stress-Strain Behavior of Sand-Bentonite Mixtures

    The influence of soil structure on the behavior of clay-rich mixtures has been examined. Mixtures of sand and bentonite, known as buffer, have been studied to determine their suitability for nuclear fuel waste containment. Triaxial tests have been performed on compacted specimens to determine the strength and constitutive behavior of the buffer. Two techniques were followed in preparing ...


    By ASTM International

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