Investigation into a biosupplementation for possible reduction of activated sludge production in a system with excess biological phosphorus removal

Abstract

The availability and use of so-called “biosupplements” (or biological “catalysts”) in wastewater treatment systems has increased significantly in recent years. The effectiveness of adding either live cultures of micro-organisms produced commercially (or enzyme products from such cultures) to systems which naturally develop mixed and complex populations of many different microorganisms (e.g. activated sludge) may be questioned. Comparatively few studies have been published in which the commerciallyproduced cultures have been tested under controlled conditions. This study was aimed at conducting a controlled study of one “liquid live micro-organism” (LLMO) product in a nitrification-denitrification biological enhanced phosphorus removal (NDBEPR) activated sludge system. The product was marketed by the supplier for its ability to reduce sludge production in activated sludge systems.

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