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About product and suppliers:
        Alibaba.com offers 35,863 sewage treatment products. About 52% of these are water treatment, 5% are carbon black, and 3% are paper chemicals. 

A wide variety of sewage treatment options are available to you, such as free samples, paid samples. 

There are 35,171 sewage treatment suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Taiwan, which supply 97%, 1%, and 1% of sewage treatment respectively. 

Sewage treatment products are most popular in Southeast Asia, Domestic Market, and Mid East. 

You can ensure product safety by selecting from certified suppliers, including 19,237 with ISO9001, 6,155 with Other, and 3,865 with ISO14001 certification.