The sludge treatment is realy ...

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The sludge treatment is realy issue if i am not wrong. Read this apper which is sort of case study describing different ways about waste treatment fro the drinking water treatment plant WASTES FROM WATER TREATMENT PLANTS: LITERATURE REVIEW, RESULTS OF AN ILLINOIS SURVEY AND EFFECTS OF ALUM SLUDGE APPLICATION TO CROPLAND - http://www.isws.illinois.edu/pubdoc/cr/iswscr-429.pdf