This paper describes a zero discharge design intended to make jack-up drilling rigs as environmentally clean as possible. Waste streams of conventional rigs were listed and traditional methods of collection and treatment were identified. Next, certifying authority rules and regulatory requirements were reviewed and finally a study of various types of treatment equipment was conducted. Information from the foregoing research was used to develop a design for use in upgrading existing rigs and to also provide a system to be incorporated in new building programs. This effort has lead to increased catchment of effluent streams, selection of latest technology treatment equipment and increased use of monitors. The project has resulted in the design of systems that will make both new and existing rigs more environmentally acceptable.

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