title: Laboratory-scale trickling filter production of mixed cultures of micro-organisms for effluent treatment studies or BOD tests.
mesh_terms: D001431:Bacteriological Techniques / Q000295:instrumentation*; D003470:Culture Media; D005374:Filtration; D007201:Indicator Dilution Techniques; D010084:Oxidation-Reduction
chemical_list: D003470:Culture Media