biodegradability test Articles

  • Biodegradation Tests for Wastewater Samples

    Biodegradation Tests for Wastewater Samples Biodegradation tests usually involve comparison of the oxygen uptake of a test sample – or gas production for anoxic or anaerobic tests – to that for a readily biodegradable control substrate (usually acetic acid, ethanol, or aniline). While biodegradation characteristics can vary among chemical types and wastewater sources, typical patterns are shown ...


    By Challenge Technology

  • Biodegradable polyethylene

    It is universally recognised that polyethylene (PE) is bio-inert. Indeed, conventional LDPE is used as a standard for bio-inertness in biodegradability/compostability test methods. It is not biodegradable because it is hydrophobic and because it consists of molecules having a high molar mass. Nevertheless it is a marvellous source of energy consisting entirely of the elements carbon and hydrogen ...


    By ORBIT e.V.

  • Fungal Biodegradation

    Introduction The utilization of fungal biodegradation involves the controlled usage of these specially cultivated fungi to treat contaminants. White Rot Fungus White rot fungus has been reported to degrade a wide variety of organopollutants because of its lignin-degrading or wood-rotting enzymes. Two different treatment configurations have been tested for white rot fungus, in situ and ...

  • Prediction of Biodegradability from Chemical Structure: Modeling of Ready Biodegradation test DNA

    Biodegradation data were collected and evaluated for 894 substances with widely varying chemical structures. All data were determined according to the Japanese Ministry of International Trade and Industry (MITI) I test protocol. The MITI I test is a screening test for ready biodegradability and has been described by Organization for Economic Cooperation and Development (OECD) test guideline 301 C ...

  • Biodegradability of industrial textile wastewater – batch tests

    Following new trends we applied oxygen uptake rate (OUR) tests as well as long-term tests (in two batch bioreactors systems) in order to assess the biodegradability of textile wastewater. Effluents coming from a dyeing factory were divided into two streams which differed in inorganic and organic contaminants loads. Usefulness of the stream division was proved. Biodegradation of the low-loaded ...


    By IWA Publishing

  • Biodegradability of Dissolved Organic Nitrogen: Adaptation of the BOD Test

    To prevent eutrophication in receiving waters, many astewater treatment plants are being firected by regulatory agencies to achieve very low levels of total nitrogen (3-4 mg/L TN or lower) in the effluent. Dissolved organic nitrogen (DON) component is included within these total nitrogen limits. The regulations assume that DON is completely biodegradable, and therefore needs to be included in any ...

  • Intrinsic Biodegradation Kinetics Of Chemicals

    Intrinsic Biodegradation Kinetics Of Chemicals An understanding of the rate of biodegradation kinetics for specific industrial chemicals is useful when evaluating their treatability or their impact on treatment processes. The objective of kinetic assessments usually is to model the biodegradation reactions for specific chemicals using either pure cultures or defined ...


    By Challenge Technology

  • Biodegradable flocculants: Power of `natto`

    Just by adding and stirring (1 agent, 1 process) 'PG alpha 21Ca' to polluted water, it separates supernatant water with better turbidity, BOD, and COD, and sediments in a short time. This high-molecular flocculent adsorbs strongly the exogenous incretion disturbance substance (Environmental hormone ), like dioxin. By using this high-molecular flocculent, it is possible to draw and collect ...


    By Poly Glu USA

  • Comparison of biodegradation performance of OECD test guideline 301C with those of other ready biodegradability tests

    The OECD Guidelines for the Testing of Chemicals lists seven types of tests for determining the biodegradability of chemical compounds (301A–F and 310). In this study, we compared the biodegradation performance of test guideline (TG) 301C, which is applied in Japan's Chemical Substances Control Law, with the performance of the other six RBTs listed in the guidelines. TG 301C specifies use of ...


    By John Wiley & Sons, Ltd.

  • Organic waste biodegradability test bio methane potential method

    Management Summary The biogas production from a mixture of food waste, garden waste, paper, napkins, plastic, metals and glass and anaerobically digested sludge was monitored until gas production had ceased. The homogenised biowaste mixture was subjected to two pre-treatment methods prior to being fed to the BMP reactors, these were: pasteurisation at 70oC ...


    By Cambi AS

  • Pilot-test evaluation for enhanced anaerobic biodegradation of chlorinated ethanes

    In March 2004, an organic substrate mixture was injected through four permanent injection wells at an industrial site to enhance the anaerobic biodegradation of chlorinated ethanes in groundwater. Chemicals of concern (COCs) at the site are the solvent 1,1,1-trichloroethane (1,1,1-TCA), and degradation products 1,1-dichloroethane (1,1-DCA), 1,1-dichloroethene (1,1-DCE), and chloroethane (CA), all ...


    By RNAS Remediation Products

  • Effect of test concentration in ready biodegradability test for chemical substances: Improvement of OECD test guideline 301C

    In Japan, understanding the environmental persistence of chemicals is very important for risk assessment, and ready biodegradability tests are mainly conducted according to the Organisation for Economic Co‐operation and Development Test Guideline 301C (TG301C). However, the highest test concentration specified in TG301C, 100 mg/L, may cause microbial toxicity and incomplete biodegradation. We ...


    By John Wiley & Sons, Ltd.

  • Evaluation of the aerobic and anaerobic biodegradability of the antibiotic norfloxacin

    The purpose of studying the biodegradability of pharmaceutical compounds is to evaluate their behaviors in relation to the treatment processes generally used in domestic and industrial wastewater treatment plants. The antibiotic norfloxacin was found to be a recalcitrant compound. The studies conducted showed norfloxacin removal rates of 12% and 18% when biomasses from treatments ...


    By IWA Publishing

  • Biosynthesis of biodegradable polyhydroxyalkanotes biopolymers in genetically modified yeasts

    Abstract: In the recent decade, biosynthesis of the degradable biopolymers polyhydroxyalkanotes in transgenic yeasts became an important research task. Most research strategies depend on either metabolic engineering or molecular approaches. In the present work, research compared PHA biosynthesis in two types of yeasts; Saccharomyces cerevisiae and a non-convenient Kloeckera spp. Yeast strains ...

  • Passively Enhanced in Situ Biodegradation of Chlorinated Solvents.

    INTRODUCTION 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 ...


    By REGENESIS

  • 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

  • An assessment of the toxicity of pyridinium chlorides and their biodegradation intermediates

    Toxicity investigations were conducted for four pyridinium chlorides belonging to cationic surface-active substances (CSAS), which differed from each other in the numbers of methyl groups (CH(3)) in pyridinium ring. The crustacean Daphnia magna, the fish Lebistes reticulatus and the alga Scenedesmus quadricauda were chosen as biotests. Toxicity of examined preparations appeared to be very high ...


    By MicroBioTests Inc.

  • Degradation of biodegradable plastics under controlled composting conditions

    The management of solid waste is a growing concern in many countries. Municipal solid waste is a major component of the total solid waste generated by society, and the fraction of municipal solid waste made up of plastic materials continues to increase. The composting of plastic materials along with organic wastes will help society to usefully recycle more of its solid waste and divert it from ...


    By ORBIT e.V.

  • R&D testing the oxygen barrier properties of biodegradable packaging materials - Case Study

    The Hemicellulose research group have chosen the Systech Illinois 8001 oxygen permeation analyser to test the barrier properties of polysaccharide films. The University of Helsinki is at the forefront of international research and doctoral education. The quality of the University’s research is reflected in the high number of Centres of Excellence, Academy Professors, ...


    By Systech Instruments Ltd

  • University Research Group utilise the Systech 8001 OTR analyser to test the oxygen barrier properties of biodegradable packaging materials

    The University of Helsinki is at the forefront of international research and doctoral education. The quality of the University’s research is reflected in the high number of Centres of Excellence, Academy Professors, Fellows and Researchers. It is also actively involved in the Strategic Centres for Science, Technology and Innovation which enable leading research units and companies to ...


    By Systech Instruments Ltd

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