Thai Flood Decontamination Balls are Great – If They Work
ก้อนจุลินทรีย์ดีมากถ้ามันใช้ได้กับน้ำท่วมไทย

Thai Flood Decontamination Balls are Great – If They Work – WSJ, November 7, 2011
…Efforts to make and distribute the “Effective Micro-organism,” or “EM” Balls have spread across the city, with volunteers gathering at Bangkok’s Amarin Plaza mall and other sites in recent weeks to mold together hundreds of thousands of the balls for distribution into flooded areas. The tennis ball-shaped wonders are made out of a lumpy, sandy mixture of clay, rice husks, sand and microorganisms, and are believed to be capable of disinfecting five cubic meters of floodwater when dropped in. The balls are said to last up to a month, making them potentially ideal for sanitizing standing floodwaters that threaten to spread disease and infections…