Unlike some other reproductions of classic texts (1) We have not used OCR(Optical Character Recognition), as this leads to bad quality books with introduced typos. (2) In books where there are images such as portraits, maps, sketches etc We have endeavoured to keep the quality of these images, so they represent accurately the original artefact. Although occasionally there may be certain imperfections with these old texts, we feel they deserve to be made available for future generations to enjoy.

Due to the very old age and scarcity of this book, many of the pages may be hard to read due to the blurring of the original text.

Due to the very old age and scarcity of this book, many of the pages may be hard to read due to the blurring of the original text.

Due to the very old age and scarcity of this book, many of the pages may be hard to read due to the blurring of the original text.

These articles discuss aerobic and anaerobic biological degradation for dehalogenating sites contaminated with pesticides and chlorinated solvents. Bench-and field-scale studies are described, as are microcosm studies, numerical simulations, and site characteristics and their effect on the stability of methanotrophic community. Methods discussed include air venting, alternative electron donors, biofilm reactors, surfactants, municipal digester sludge, iron enhancement, and sulfate reduction to improve conditions for microbial consortia.

These articles focus on methods for optimizing the effectiveness of microorganisms for biodegradation. This volume includes discussions of the biodegradation and toxicity of PAH-, PCP-, PCB-, and BTEX-contaminated soil and aqueous sediments. Both bench-scale and pilot-scale studies deal with microbial issues such as surfactant-enhanced aromatic hydrocarbon degradation, nutrient addition and bioavailability, and various dispersion techniques. Selected case studies include discussions on pre-culture and consortium biodegradation of various petroleum hydrocarbons.