Kinetika reaksi biokimiawi EM4 pada penguraian limbah cair pabrik tahu : studi kasus Pabrik Tahu, Kukusan, Depok, Jawa Barat = The Kinetics of the Biochemical Reaction of EM4 to elements of Liquid waste from a Tofu Factory : A case study of Tofu Factory in Kukusan, Depok, West Java