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<br />Title I Program <br />Colorado River Basin Salinity Control Act <br /> <br />equipment offered to and ultimately <br />accepted by the Government. <br /> <br />After testing was completed at the YDTF, <br />research was moved to Reclamation's <br />chemical engineering pilot plant laboratory <br />in Denver and to the newly constructed <br />YDP Test Train (currently called the Test <br />Plant). Most of the continuing pretreatment <br />research was conducted at the Test Train <br />because of the availability of process water <br />and actual YDP feed water, <br /> <br />The use of surface water as the feed water <br />focused research on problems of national <br />interest to the desalting industry, Studies <br />performed included using polymer additions <br />to improve water clarity, testing the ability <br />of cellulose-consuming bacteria to survive <br />the pretreatment process, optimizing <br />clarification and sludge concentration to <br />ensure pumpable sludge, and changing <br />disinfection processes to reduce or eliminate <br />the production of trihalomethanes. These <br />studies have broad application because they <br />provide a basis for research in treating <br />other water sources, <br /> <br />Reclamation engineers and scientists, <br />working with membrane manufacturers, <br />have helped improve the quality of the <br />membrane supplied and have been <br />instrumental in switching to <br />environmentally acceptable chemical <br />products for membrane storage and <br />cleaning. Reclamation also has identified <br />environmentally acceptable processes for <br />neutralizing chemical biocides, <br /> <br />Desalting equipment manufacturers have <br />adopted new approaches developed to <br />monitor desalting unit performance in the <br />YDP, These approaches included detailed <br />autopsy procedures for damaged mem- <br />branes, use of a newly developed and <br />patented plugging factor monitor, and <br />on-line instrumentation for real-time <br />monitoring of unit performance. <br /> <br />32 <br /> <br />Ongoing Research and Development <br /> <br />During construction, research and <br />development focused on solving problems <br />specific to the YDP, including biomass and <br />grit removal, chemical feed and piping <br />failures, dual media ftIter per- formance, <br />and membrane degradation, Needed <br />modifications and changes will be completed <br />in 1992, <br /> <br />Reclamation will continue to develop re- <br />search and development programs, This <br />effort, which includes the cost reduction <br />program discussed in chapter IV, may not <br />only reduce operating costs but may also <br />increase the efficiency ofthe YDP and <br />thereby minimize waste and conserve <br />materials and energy. (Some waste <br />materials are hazardous and should be <br />minimized for economic as well as for <br />health, safety, and environmental reasons.) <br />Reclamation is pursuing the following <br />research and development activities: <br /> <br />. Continue national and international <br />technology exchange program. <br /> <br />. Identify alternative biocide. <br /> <br />. Perform clean water test for control <br />comparison with normal and test <br />operations, <br /> <br />. Form professional board to review <br />research and development needs and <br />accomplishments, <br /> <br />. Demonstrate membrane storage <br />technology, <br /> <br />. Perform membrane fouling investigation. <br /> <br />. Investigate catalyzed chlorine attack on <br />membranes. <br /> <br />. Identify and adopt new measurement <br />techniques, <br /> <br />. Optimize YDP pretreatment, <br />