Waste water treatment in industrial zones, the village, the landfill, the farm ... very difficult and expensive! The song "handle the smell from the mud trench drains, sewage sludge as well as find out the technology recycling sewer mud" after sewage (known as sewage sludge hazardous substances) are also difficult, complex multiples by most sewage sludge contains many hazardous waste, contaminants, heavy metals deposition attached to it is the decomposition of organic substances that make up the H2S gas , NH3 ... warm smelly stink cause much disease anonymously, diseases affecting the quality of life, health of people living coastal canals, sewage pollution, loss of important American municipality
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