biodegradability study Articles

  • 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 ...

  • Study on primary metabolites and possible biodegradation pathways of nonylphenol

    In this paper, the primary metabolites and possible biodegradation pathways of nonylphenol (NP) were analysed by two experimental methods and the interpretation of GC?MS results. One was that activated sludge degraded blank and spiking simulating wastewater for NP. Another was that a dominant bacteria group metabolised the medium contained NP as the only organic carbon source. The results show ...


    By Inderscience Publishers

  • Biodegradable products enhance oil production case study

    Kemira’s biodegradable products play an important role in oil production in the North Sea. When seawater is injected into the deposits to move oil toward the drill pipes, it comes into contact with a different type of water: the water under the seabed. These two types of water do not mix well, and the layers of scale that form as a result may damage pipelines and halt production. The ...


    By Kemira Water Solutions, Inc.

  • Maintenance To-Do: Coil Cleaning

    A coil-cleaning program should be an integral part of maintaining some kinds of process cooling equipment. Most people think of coil cleaning as a building or facility prepares to turn on the air-conditioners for another season. Admittedly, spring is a perfect time to put such cleaning and maintenance at the top of the to-do list. Condenser and evaporator coils are an integral part of HVAC ...


    By Evapco Inc.

  • Combination of hydrodechlorination and biodegradation for the abatement of chlorophenols

    A method for abatement for chlorophenols (CPs) in contaminated water based on successive steps of catalytic hydrodechlorination (HDC) over Pd/C at ambient temperature and pressure, followed by aerobic biodegradation using yeast Candida tropicalis (C. tropicalis) was studied. The results showed that 4-chlorophenol (4-CP) and 2,4-dichlorophenol (2,4-DCP) could be easily and ...


    By IWA Publishing

  • Modeling ready biodegradability of fragrance materials

    In the present study, Quantitative Structure Activity Relationships were developed for predicting ready biodegradability of approximately 200 heterogeneous fragrance materials. Two classification methods, Classification And Regression Tree (CART) and k‐Nearest Neighbors (k‐NN), were applied to perform the modeling. The models were validated with multiple external prediction sets, and the ...


    By John Wiley & Sons, Ltd.

  • 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 ...

  • 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

  • Study on biodegradability of terephthalic acid in polyester fabric alkali-peeling process wastewater

    Terephthalic acid (TA) and ethylene glycol (EG) are the main pollutants in polyester fabric alkali-peeling process wastewater (PAP-wastewater). The biodegradability of TA is crucial to the deep treatment of PAP-wastewater. Batch and continuous experiments were adopted to study the biodegradation of TA in synthetic wastewater. In anoxic batch experiments TA began to degrade gradually after EG was ...


    By IWA Publishing

  • Accelerating Aerobic Biodegradation of GRO/DRO: A Five-Year Study (PDF)

    Gasoline Range Organics (GRO) and Diesel Range Organics (DRO) contaminated the aquifer underlying a warehouse/equipment storage facility in Homer, AK. This contamination originated from leaks in underground storage tanks located in the northern section of the site. Groundwater flow at the site is controlled in large part by a finger drain running through the facility. This finger drain, cut four ...


    By REGENESIS

  • Biodegradation of PPCPs in wastewater treatment plants - a Danish case study

    The non-restricted production and use of pharmaceuticals and personal care products (PPCPs) has led to their presence in effluents from treatment plants, which can pose a threat to aquatic organisms downstream. This study analysed the breakdown of six common chemicals in four Danish treatment plants. The findings shed new light on the factors affecting removal of PPCPs from waste, showing that ...

  • Biodegradation of MTBE Utilizing A Magnesium Peroxide Compound: A Case Study.

    ABSTRACT: A patented magnesium peroxide compound was recently employed at an underground storage tank facility to increase the available oxygen in the groundwater for the biodegradation of fuel hydrocarbons. The objective of this remedial effort was to substantially reduce the dissolved-phase concentrations of BTEX and MTBE and to arrest further migration of the dissolved fuel hydrocarbon plume. ...


    By REGENESIS

  • 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

  • BM Respirometry Study Toxicity & Biodegradability of a Refinery polymer stream, when treated in the activated sludge process of the plant - Case Study

    This “batch system” respirometer consists of: a single thermostatically controlled vessel, divided into two interconnected compartments with closed recirculation loop between the two. A constant air flow is supplied via a ceramic diffuser in the conditioning compartment, and a combined oxygen/temperature sensor in the reaction compartment controls the DO and temperature. Both ...


    By SURCIS, S.L.

  • Sono-biodegradation: a promising alternative to existing bioremediation methodologies

    Pollution of fresh water has become a serious concern today for developing countries. There are umpteen treatment methodologies and protocols, but still there exists a demand for new technologies for wastewater treatment. Extensive research on pollutants and increased toxicological studies have paved the way for new technologies, such as ultrasound treatment of pollutants and wastewater ...


    By Inderscience Publishers

  • Economic Analysis of Options for Managing Biodegradable Municipal Waste

    The main objective of the study was: To conduct an economic evaluation, that considers both private and social welfare costs and benefits, of existing options for managing the biodegradable fraction of municipal solid waste. Although all management options (anaerobic digestion, composting, landfilling, incineration, etc.) receive some consideration in the study, the main emphasis has been on the ...


  • Biodegradation of Cypermethrin by pseudomonas in a batch activated sludge process

    The biodegradation of Cypermethrin (20 to 125 mg/L) in an effluent using batch activated sludge was studied. Degradation was found to occur to a great extent only in the presence of Pseudomonas (IES-Ps-1) culture. Under aerobic conditions using mechanical aerators, Cypermethrin (20 mg/L) was almost completely degraded in just over 48 h at ambient temperature. Further loading of organic compound ...

  • 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

  • Kinetic evaluation for aerobic biodegradation of resorcinol in a batch reactor

    Mixed microbial cultures contained in the sludge of effluent treatment plant of a coke oven industry have been studied for its resorcinol biodegradation capacity under aerobic environment. The result showed that, after necessary acclimatisation, the culture was able to biodegrade up to a concentration of 500 mg/L of resorcinol in the substrate. The specific growth rate of microorganisms was found ...


    By Inderscience Publishers

  • Oxygen and temperature kinetics of aerobic solid-state Biodegradation

    Rates of decomposition are of critical interest to operators of most biodegradation processes, since they determine the length of time the process must continue to achieve a particular extent of decomposition. While the goals of the decomposition process vary widely, ranging from reduction of odors or contaminants to production of high valueadded products, most of these goals are impacted by the ...


    By ORBIT e.V.

Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you