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1984•Environmental Technology LettersRequires access

Simple control equations using F:M ratio for operation of activated sludge aeration basins

John F. Heddle, J. M. Russell

Open publisher page 3 citations

Abstract

A simple control equation is developed for the operation of activated‐sludge aeration basins. The equation takes into account the following parameters: the chemical oxygen demand and rate of flow of the feed; the concentration and rate of flow of the recycled sludge; the volume of the aeration basin and of the thickened sludge in the clarifier; the desired F:M ratio; the proportion of feed COD converted into biomass for disposal and the ratio of COD to solids of that biomass. Two worked examples are given.

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What this paper is about

A simple control equation is developed for the operation of activated‐sludge aeration basins. The equation takes into account the following parameters: the chemical oxygen demand and rate of flow of the feed; the concentration and rate of flow of the recycled sludge; the volume of the aeration basin and of the thickened sludge in the clarifier; the desired F:M ratio; the proportion of feed COD converted into biomass for disposal and the ratio of COD to solids of that biomass. Two worked examples are given.

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Available abstract

A simple control equation is developed for the operation of activated‐sludge aeration basins. The equation takes into account the following parameters: the chemical oxygen demand and rate of flow of the feed; the concentration and rate of flow of the recycled sludge; the volume of the aeration basin and of the thickened sludge in the clarifier; the desired F:M ratio; the proportion of feed COD converted into biomass for disposal and the ratio of COD to solids of that biomass. Two worked examples are given.

Key concepts: Aeration, Clarifier, Activated sludge, Biomass (ecology), Volume (thermodynamics), Environmental science, Mixed liquor suspended solids, Volumetric flow rate

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