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Sewage water discharging leads to the pollution of groundwater , well water , river and many other water resources , making our living condition and body health face great threat , the grain , vegetables , fruits we eat are polluted. |
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Generally speaking, during the industrial production, various waste water is produced. Such as food industrial sewage, spinning and weaving industrial sewage, leather industrial sewage, print circuit board waste water, pharmacy industry industrial sewage and so on, waste water contains large amount of hazardous wastes and heavy metal ion. |