Purifying Contaminated Water In addition to having a bad odor and taste, contaminated water contains micro-organisms that cause diseases such as dysentery, cholera, typhoid and hepatitis.

• 净化污染的水。污水除了有异味和难喝外，还含有微生物，这些微生物会引起疾病，象痢疾，霍乱，伤寒症，肝炎。