“…A 27-L RBC treating copper cyanide and zinc cyanide achieved >99.9% removal of metal cyanide, with precipitates identified as metal hydroxides (Patil and Paknikar, 2000b Other Beggiatoa was the most commonly encountered filamentous microorganism in biofilms from 3 wastewater treatment plants (Galvan et al, 2000). A cubic lattice, providing a permeable substratum for a rotating biological contactor, resulted in a higher substrate removal rate than an impermeable substratum (Nishidome et al, 2000). High hydraulic and BOD loadings did not appreciably affect the suspended particle concentrations within the effluent.…”