Two laboratory scale fully aerated continuous flow wastewater treatment systems were used to compare the removal of five benzotriazoles and one benzothiazole by suspended and attached growth biomass. The activated sludge system was operated under low organic loading conditions. The moving bed biofilm reactor (MBBR) system consisted of two serially connected reactors filled with K3-biocarriers. ...

Recent studies of municipal solid waste landfills have revealed the influence of biodegradation upon secondary settlement. Modern landfills, however, are designed with efficient containment systems which minimise moisture ingress and thereby reduce leachate and gas generation. The shortage of moisture means that these containment systems delay decomposition and stabilisation of waste. An altern...

ganic compounds with similar structures into groups of contaminant biodegradation with pure cultures of mi-that make the commonality in basic microbial ap-croorganisms seems tractable with careful design of proaches to degradation readily apparent. The value of media for isolation of the microbes of interest. this book is greatly augmented by the availability of the As excellent as the book is,...

The increasing industrial development promotes serious environmental damage due to pollution of the environment. Regarding the petrochemical industry, contamination by oil and its derivatives causes the degradation of terrestrial and aquatic ecosystems. Thus, control and treatment strategies to combat the hazardous effects of oil pollution are needed. However, conventional physical-chemical tre...

Biodegradation of diesel oil (5 g(middot)kg [soil dry weight](sup-1)) was investigated in five alpine subsoils, differing in soil type and bedrock, in laboratory experiments during 20 days at 10(deg)C. The biodegradation activities of the indigenous soil microorganisms and of a psychrotrophic diesel oil-degrading inoculum and the effect of biostimulation by inorganic fertilization (C/N/P ratio ...

Solid phase microextraction (SPME) coupled with gas chromatography was employed to estimate bioavailability of pyrene in soils with different properties of textures, organic matter contents (SOM) and aging periods. Experimental results indicated that biodegradation rates increased from 0.10 (sandy loam) to 0.15 (silty loam) microg g-1 hr1. By contrast, biodegradation rate decreased from 0.10(1....

Biodegradation by white rot fungi Abstract Pentachlorophenol (PCP) is a major organic compound used in the wood preservation. White rot fungal strains screened from local sources such as wood trunks and twigs of higher plants. Five selected isolates of White Rot Fungi (WRF) Viz: Laetiporus cincinnatus, Trametes versicolor, Fomes fomentarius, Ganoderma aplanutum and Pleurotus ostreatus isolated ...

We determined how a cleaner and a dispersant affected hydrocarbon biodegradation in wetland soils dominated by the plant Panicum hemitomon, which occurs throughout North and South America. Microcosms received no hydrocarbons, South Louisiana crude, or diesel; and no additive, a dispersant, or a cleaner. We determined the concentration of four total petroleum hydrocarbon (TPH) measures and 43 ta...

Widely used anthropogenic chelating agents EDTA and NTA are ubiquitous in wastewaters and natural waters. Chelating agents may enhance the mobility of heavy metals and radionuclides or increase eutrophication. Biodegradation of these chelates may reduce metal mobility, offering a remediation solution. Formation of metabolic intermediates was previously reported during the biodegradation of EDTA...

The structure of the hydrophobe in alcohol ethoxylates (AE) and alkylphenol ethoxylates (APE) has a significant influence on the biodegradation pathways and biodegradation rates of these nonionic surfactants in bacterial inocula present in waste treatment plants. APE undergo initial microbial attack at the terminal part of the polyoxyethylene (POE) chain followed by a shortening of the POE chai...