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.

Hazardous waste incineration technologies have been developed to meet the needs of a rapidly growing market that has been created by the proliferation of hazardous waste in modern society. These hazardous wastes are continuously produced as by-products of many industries. Vast stockpiles of hazardous or toxic wastes are currently residing in insecure landfills, thus imperiling our drinking water supplies. This handbook is written with the user in mind. An in-depth review of regulatory and technical requirements is presented with later sections regarding permitting and operation of incineration facilities. A comprehensive description of established and emerging incinerator technologies is included along with a number of alternatives. One of the key sections involves a detailed procedure for choosing an incinerator for a specific job, including engineering calculations and going through the bid process. Rationale for whether to buy or lease incineration equipment is included as well as details on trial burns, permitting strategies, and startup and operation of incinerators. A number of typical case histories of incinerators are presented for such diverse applications as cleaning up individual sites with transportable units, stationary facilities for in-house wastes, and incinerator ships. Appendices provide a convenient reference to physical properties, combustion parameters, detailed equipment performance nomographs and several sample permits including RCRA, TSCA and local permit applications. In summary, this handbook provides a single reference point for the potential user of an incinerator as well as a valuable source of design data for incinerator vendors, consultants and regulators.

The discovery and development of local water resources is an important theme in the history of the Arab states. These volumes draw together, for the benefit of scholars, surviving historical records on the water resources of Kuwait, Bahrain, Qatar, the Trucial States and Oman, including the evaluation and management of water supplies; surveys and exploration, and water divining. Material has also been included on the Jeddah water scheme in Saudi Arabia. This small collection does not cover the Tigris-Euphrates basin, for which abundant historical material on local irrigation schemes is available [see, for example, Iraq Administration Reports 1914-1932, Archive Editions, 1992], nor the Jordan Valley, where a separate study of the complex political issues is required.

This report presents the institutional progress made in selected member countries towards achieving sanitation goals, as reported in an ESCAP-led survey. Institutional progress consists of changes in administrative, legal and financial rules and practices that have been made with sanitation goals in mind. It also includes the 'slow-moving' institutions, which are social norms and practices, general awareness of the public and the ensuing demand for sanitation services.