Makiminato River is a small river, about 4 km long, flowing into Gino Bay of Okinawa island. In July to August 2003, an NPO "Okinawa Peace Coast" conducted a cleaning operation of Makiminato River by using "T.S Minetase". They poured "T.S Minetase" into the river 3 times, 20 litters each time. It was confirmed that "T.S Minetase" was quite effective in dissolving sludges and eliminating foul odor.
The river was heavily polluted mainly by wastewater from households. Surface of the river was covered by sludges at around Yogei Bridge (about 2.5 km up stream from the river mouth). The sludges dissolved in about 2 weeks.
Following are a summary of the report.
Cleaning operation of Makiminato River including sludge dissolution was video-recorded by an NPO "Okinawa Peace Coast". Recording time is 6 minutes 10 seconds.