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About product and suppliers:
        Alibaba.com offers 991 methane digester products. About 74% of these are biogas, 7% are waste management, and 2% are water treatment. 

A wide variety of methane digester options are available to you, such as cooking fuel, industry fuel. You can also choose from free samples. 

There are 991 methane digester suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Switzerland, and India, which supply 99%, 1%, and 1% of methane digester respectively. 

Methane digester products are most popular in Africa, Domestic Market, and Mid East. 

You can ensure product safety by selecting from certified suppliers, including 124 with ISO9001, 37 with ISO14001, and 11 with Other certification.