Title Modelling of chloride influence upon activated sludge community growth
Translation of Title Chloridų įtakos veikliojo dumblo biocenozės dinamikai modeliavimas.
Another Title Моделирование влияния хлоридов на динамику биоценоза активного ила.
Authors Skaisgirienė, Audra ; Janutėnienė, Jolanta ; Vaitiekūnas, Petras
DOI 10.3846/1648-6897.2009.17.114-120
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Is Part of Journal of environmental engineering and landscape management.. Vilnius : Technika. 2009, vol. 17, no. 2, p. 114-120.. ISSN 1648-6897. eISSN 1822-4199
Keywords [eng] wastewater ; aerobic treatment ; activated sludge ; chlorides ; enzymes ; mathematical modelling
Abstract [eng] Growth kinetics, i.e. the relationship between specific growth rate and the concentration of a substrate, is one of the basic tools in the modelling of activated sludge community growth. The above-described conventional growth kinetics derived from single-substrate-controlled laboratory experiments have invariably been used for describing both growth and substrate utilization in wastewater treatment. After technological processes various mineral substances, such as chlorides, get into water bodies. These substances are not removed from wastewater by the biological treatment method. The purpose of this study is to determine the concentrations of chlorides, investigate the influence of enzyme preparations upon wastewater treatment quality during biological process modelling. Kinetics of microbial growth was designed using the model of Monad. To analyse the chloride influence on the biooxidation process a series of laboratory tests was carried out: biochemical oxygen consumption (BOD), activated sludge concentration and other indexes. It is found experimentally that a 400 mg/l concentration of chlorides disarranges the activity of microorganisms and activated sludge is no longer suitable for biological treatment. Also, we investigated the effect of enzyme preparation on effluence on sewage treatment. As chloride concentrations are increased in a tank without an enzyme, bacterial spores contained in the enzyme preparation produce a renewing effect upon active sludge.
Published Vilnius : Technika
Type Journal article
Language English
Publication date 2009
CC license CC license description