Came across a story that there is a new technology for sewage water management industry in Netherlands
“The strength of the Nereda technology lies in special bacteria that grow in concentrated and fast settling granules. Conventional methods of treating wastewater use bacteria in fluffy flakes, which take much more time to separate from the treated water.”
Well, the idea is clear, but is it possible for some bacteria to leave the organic clumps in the form of concentrated granules while most bacteria make them into fluffy flakes?
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"...Although the Duluth facility uses some of the most advanced technology for cleaning wastewater -- so-called tertiary treatment -- the study identified it as an important source of antibiotic resistance genes. Sampling of water at 13 locations detected three genes, for instance, that make bacteria resistant to the tetracycline group of antibiotics, which are used to treat conditions ranging from acne to sexually transmitted diseases to anthrax and bubonic plague. LaPara's team says their research demonstrates that even the most high-tech sewage treatment plants may be significant sources of antibiotic resistance genes in waterways.The Duluth sewage treatment plant study appears in ACS' journal Environmental Science & Technology. The authors acknowledge funding from the National Science Foundation and the Minnesota Environment and Natural Resources Trust Fund. The American Chemical Society is a non-profit organization chartered by the U.S. Congress. With more than 163,000 members, ACS is the world's largest scientific society and a global leader in providing access to chemistry-related research through its multiple databases, peer-reviewed journals and scientific conferences. Its main offices are in Washington, D.C., and Columbus, Ohio." [http://www.waterworld.com/index/display/article-display/6551521175/articles/waterworld/wastewater/treatment/2011/12/Sewage-treatment-plants-may-contribute-to-antibiotic-resistance.html "Sewage treatment plants may contribute to antibiotic resistance problem"].