<![CDATA[The experiment was conducted to in order know the effect of effective microorganisms(EM4) on the tofu waste water in the Chemical laboratory FMIPA Riau University Pekanbaruon 18 March - 08 April 2010. Samples were taken from outlet of tofu industry Sido RukunStreet Kecamatan Payung Sekaki. The treatment was using EM4 with concentration of 1:20(Treatment A), the second treatment was using concentration of EM4 1:10 (Treatment B) andC as control. The results of the experimental showed that Treatment A was more effectivethan Treatment B and Control in decreasing BOD and COD for 13 days experiment.]]>
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