Micro-Organisms Occurring in the Activated-Sludge Treatment of Carbonization Effluents: Preliminary Studies

摘要

A variety of microbiological techniques were employed to study micro-organisms involved in the treatment of effluents by activated-sludge processes. These included light microscopy; isolation and cultivation of bacteria; the physical, microscopic and biochemical tests of bacterial classification and long-term monitoring of microbial populations. Bacteria were the most important and numerous of the micro-organisms in the activated-sludge treatment systems studied. A wide variety of species was found to be present. After bacteria, the most numerous micro-organisms were representative of two sub-classes of ciliated protozoa, i.e., the free-swimming ciliates (Holotricha) and the stalked ciliates (Peritricha), and the rotifers (Class Rotifera). They were probably important in producing a clear effluent and were generally associated with well-treated effluents. The occurrence of protozoa and rotifers was considered useful as an indicator of sludge condition. (ERA citation 05:021666)