Combined effects of biological solids retention time and temperature on the growth parameters of activated sludge

Hideki Harada, J. Matsumoto

Research output: Contribution to journalConference articlepeer-review

Abstract

A mixed microbial population of activated sludge was continuously cultivated wih various biological solids retention times (SRTs) and temperatures. The SRT and temperature caused shifts in the predominant population, entailing changes in the overall growth activities of activated sludge. Populations exhibiting higher respiratory activities, less resistances to inactivation by heat and larger ratios of protein to carbohydrate content in the cells were enriched in continuous runs at shorter SRTs and higher acclimation temperatures, and vice versa. The optimum temperature at which the population activity attains at maximum decreased with a reduction in SRT together a decrease in acclimation temperature. The dependence of K(s) value (the substrate saturation constant in the Michaelis-Menten equation) on acclimation temperature varied with SRT.

Original languageEnglish
Pages (from-to)171-176
Number of pages6
JournalWater Science and Technology
Volume13
Issue number9
Publication statusPublished - 1981 Jan 1
EventPract Exper of Control and Autom in Wastewater Treat and Water Resour Manage, Pt 2, Proc of an Int Workshop of the IAWPR - Munich, Ger
Duration: 1981 Jun 201981 Jun 26

ASJC Scopus subject areas

  • Environmental Engineering
  • Water Science and Technology

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