biodegradability measurement anaerobic condition Articles

  • Evaluation of biotreatability of ionic liquids in aerobic and anaerobic conditions

    The aim of our study was to set up an approach for reliable biotreatability assessment of ionic liquids (ILs). As a case study, two different ILs were selected: pyridinium-based 1-butyl-3-methylpyridinium dicyanamide ([bmpyr][dca]) and imidazolium-based 1-butyl-3-methylimidazole tetrafluoroborate ([bmim][BF4]). Toxicity in aerobic conditions was determined by measurement of inhibition of oxygen ...


    By IWA Publishing

  • Passively Enhanced In-Situ Biodegradation of Chlorinated Solvents

    Harding Lawson Associates (HLA) conducted a field demonstration to evaluate in situ enhanced anaerobic biodegradation of chlorinated solvents using Hydrogen Release Compound (HRC). The technology is designed to enhance the natural biodegradation process for a more rapid and complete degradation of the organic contaminants to non-toxic compounds (e.g., ethylene). This paper presents the results ...


    By REGENESIS

  • Extent and rate of biodegradation of different organic components in municipal solid waste

    Rates and extent of biodegradability of four different organic components of municipal solid waste (leaf litter, newspaper, magazine paper and A4 sheet) were evaluated under optimum conditions. Total solids (TS) removals in biotic samples ranged from 74.7% to 78.8% while volatile solids removals ranged from 75.7% to 84.8%. Significant biodegradation of tannin–lignin was observed for all four ...


    By Inderscience Publishers

  • Managing Compostable Bags At Anaerobic Digestion Plants

    The highest and best use for treating residential food waste is through source separation, sending organics first to anaerobic digestion (to capture energy), followed by aerobic composting (to return nutrients to the soil). Sending food waste to anaerobic digestion (AD) facilities requires appropriate tools and planning for capturing high volumes of material with low contamination. Compostable ...


    By BioCycle Magazine

  • Treatment of Perchlorate and 1,1,1-Trichloroethane in Groundwater using Edible Oil Substrate (EOS®)

    ABSTRACT: Laboratory studies and a pilot-scale field test are being conducted to evaluate the use of edible oil emulsions for biodegradation of perchlorate and 1,1,1-trichloroethane (1,1,1-TCA) in groundwater at a site in Maryland. The patented Edible Oil Substrate (EOS®) process is a cost-effective approach for stimulating in situ anaerobic biodegradation with little or no operation and ...


    By EOS Remediation, LLC

  • Toxicity Assessment Using a Dilution Series

    Toxicity, or more appropriately, inhibition, is a measure of the interference of a compound or compounds with biodegradation. Since inhibition usually is expressed as the interference with bioconversion of an oxygen-consuming reaction – or gas producing reaction in the case of anoxic or anaerobic reactions – it is essential that a biodegradable substrate be present when assessing toxicity of ...


    By Challenge Technology

  • Controlling Methane ar ERD and ISCR Applications

    In situ chemical reduction (ISCR) and enhanced reductive dehalogenation (ERD) have demonstrated success in the remediation of numerous recalcitrant and toxic compounds, including chlorinated ethenes and hexavalent chromium.  ISCR describes the combined effect of stimulated biological oxygen consumption (via fermentation of an organic carbon source), direct chemical reduction with ...

  • Sure, We Have Lots of Bioreactor Solids… But How Many are Active?

     ABSTRACT Biological wastewater treatment processes harness the ability of microorganisms to break down and assimilate organic compounds that, if left untreated, cause detriment to the environment. Although this process occurs naturally, engineered systems are used to accelerate the process by optimizing bioreactor conditions to promote higher-than-typical biomass concentrations, thus ...

  • Bioventing

    Introduction Bioventing is a promising new technology that stimulates the natural in situ biodegradation of any aerobically degradable compounds in soil by providing oxygen to existing soil microorganisms. In contrast to soil vapor vacuum extraction, bioventing uses low air flow rates to provide only enough oxygen to sustain microbial activity. Oxygen is most commonly supplied through direct air ...

  • The Use of Hydrogen Release Compound (HRC) for CAH Bioremediation.

    Hydrogen Release Compound (HRC™) is a simple, passive, low-cost and long-term option for the anaerobic bioremediation of chlorinated aliphatic hydrocarbons (CAHs) via a reductive dehalogenation pathway. Applications to other classes of chlorinated compounds that are anaerobically degradable by this mechanism are under investigation. HRC should be viewed as a tool for the enhancement of natural ...


    By REGENESIS

  • Data Requirements for Soil, Sediment, and Sludge

    Site soil conditions frequently limit the selection of a treatment process. Process-limiting characteristics such as pH or moisture content may sometimes be adjusted. In other cases, a treatment technology may be eliminated based upon the soil classification (e.g., particle-size distribution) or other soil characteristics. Soils are inherently variable in their physical and chemical ...

  • Bioremediation of an Oil Spill

    Bioremediation is the method of choice to effectively clean up a small spill of hydrocarbons. In this case, five-hundred liters of BTEX has spilled from an above ground storage tank into a pasture that is located at the west edge of the Royal Roads University (RRU) grounds. The soil is classified as a Gleyed Eutric Brunisol based on recent laboratory analysis; it contains clay, but is fairly ...


  • The In Situ Bioremediation/Groundwater Remediation Process

    In-situ groundwater bioremediation is a technology that encourages growth and reproduction of indigenous microorganisms to enhance biodegradation of organic constituents in the saturated zone. In-situ groundwater bioremediation can effectively degrade organic constituents which are dissolved in groundwater and adsorbed onto the aquifer matrix. The Adventus In Situ Bioremediation/Groundwater ...


  • Consideration of the Effects of Remediation Technologies on Natural Attenuation.

    ABSTRACT: We have long understood and continue to improve our understanding of the geochemical conditions that favor biodegradation of petroleum hydrocarbons. Over the last several years our understanding of the conditions that are necessary for and/or promote reductive dechlorination of chlorinated hydrocarbons has improved substantially. Over this time in situ remediation technologies have ...


    By REGENESIS

  • Generation using gas-fuelled engines in South Africa – an overview

    Most gas engines are Otto cycle spark ignition internal combustion reciprocating engines using natural gas as the primary fuel. Smaller models utilise stochiometric combustion while the larger engines are lean burn engines with pre-chamber ignition systems. The engines are coupled with packaged generator sets, ...


    By Clarke Energy

  • Renewable energy marketplace

    ALLU Group markets two types of equipment for use in biomass energy operations. The ALLU Screener Crusher bucket attaches to a front-end loader. The bucket is designed to aerate, crush, screen and mix at one time. The Screener Crusher has a rigid steel frame, onto which horizontally rotating screening and crushing drums are mounted. All the drums rotate in the same direction. There are several ...


    By BioCycle Magazine

  • Harnessing The Power Of Microbes

    University researchers are advancing both the understanding and scalability of a biological process where bacteria living under anaerobic conditions consume organic waste and generate electrons and protons that are tapped for electricity production.IMAGINE a self-sustaining battery that never runs out of juice. While the notion may sound far-fetched, Dr. Leonard Tender at the Naval Research ...


    By BioCycle Magazine

  • Refuse Derived Fuel, Current Practice and Perspectives

    Untitled Document Summary I OBJECTIVES The objectives of the project were to undertake a survey on the current ...

  • Field Application of a Lactic Acid Ester for PCE Bioremediation.

    ABSTRACT: As part of a strategy to enhance reductive dechlorination with a timed release of hydrogen, an application of glycerol polylactate (GPL) was made to a dry cleaner site contaminated with perchloroethylene (PCE). GPL is one of several proprietary lactic acid esters sold commercially as Hydrogen Release Compound (HRCTM). When HRC contacts the saturated contaminated zone, the lactic acid ...


    By REGENESIS

  • Why high temperature combustion of landfill gas?

    Due to the accumulation of knowledge and the tightening of environmental law, the landfill technology has increasingly become concerned with the management of trace compounds in landfill gas. With landfill gas, contamination is through sulphur, chlorine, fluorine, halogenated hydrocarbons and heavy metals. Other trace elements such as volatile organic compounds (VOC), impose environmental ...


    By Hofstetter BV

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