DUDLEY KNOX LIBRARY NAVAL POSTGRADUATE SCHOOl MONTEREY CA 93943-5101 MUNICIPAL WASTE INCINERATOR PUBLIC WORKS CENTER, YOKOSUKA JAPAN EVALUATION AND RECOMMENDATIONS by Wade B. Wilhelm LT, CEC, USN Department of Civil Engineering Environmental Engineering and Science Program University of Illinois at Urbana-Champaign Master of Science in Mechanical Engineering April 1993 6-1 DUDLEY KNOX LIBRARY NAVAL POSTGRADUATE SCHOOl MONTEREY CA 93943-5101 ABSTRACT A study was done on the Municipal Waste Incinerator (MWI) located at the Public Works Center (PWC) Yokosuka, Japan. The facility consists of two incinerators with combustion capabilities of 3.54 ton (3.22 metric tons) per hour, each equipped with a quencher and a venturi tube where Ca(OH) and Tesisorb are injected to remove HCI and 2 S02 from the gas stream, and a fabric filter to remove particulate matter. HCI, NOx, and S02 emissions are continually monitored. Supporting facilities include waste segregation facilities, cardboard, aluminum, and plastic compacting equipment, and a wood shredder. The facility currently meets both Japanese and U.S. air emission standards. This study investigated the feasibility of burning additional plastic and wood in the incinerator, methods of improving operations or decreasing costs, and evaluates the overall waste management program at the Yokosuka Base. Additional wood and plastic may be burned in the incinerator, but it will make controlling the temperatures within the incinerator more difficult, thus this proposal is not popular with the operators. The Ca(OH) and Tesisorb injection rates were decreased during 2 the site visit to prior to November 1991 levels. Additional savings, $76,000 to $100,000 per year, are proposed by eliminating Tesisorb injection completely, increasing the Ca(OH) 2 injection rates, and changing the control scheme so that the Ca(OH) injection rate is not 2 controlled by the gas temperature, but by the emission levels of S0 and HCI. 2 Regarding overall waste management it is recommended that off-base residents be taught how to dispose of their waste off base and encouraged to do so. The amounts of waste handled at the facility may be reduced by increased emphasis on recycling (especially paper) and through composting.