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A model for the activated sludge process which considers wastewater characteristics, floc behavior, and microbial population
Author(s) -
Benefield Larry,
Molz Fred
Publication year - 1984
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/bit.260260410
Subject(s) - nitrification , activated sludge , chemistry , wastewater , population , suspension (topology) , phosphate , sewage treatment , biomass (ecology) , activated carbon , environmental chemistry , steady state (chemistry) , bioreactor , chemical engineering , pulp and paper industry , nitrogen , environmental science , environmental engineering , ecology , organic chemistry , biology , demography , mathematics , adsorption , sociology , homotopy , pure mathematics , engineering
A mathematical model has been developed which describes organics removal, oxygen utilization, ammonianitrogen removal, ortho‐phosphate removal, and biomass production in an aggregated microbial suspension containing a uniform floc size and the organics as a soluble biodegradable material. It is applicable to both steady‐state and transient conditions, as well as to systems experiencing only carbon oxidation or to systems experiencing both carbon oxidation and nitrification. The model, consisting of five partial differential equations and four ordinary differential equations, takes into account the flow pattern in the reactor, intraparticle mass transport of oxygen, organics, ammonia‐nitrogen and ortho‐phosphate, and biochemical reactions by the individual cells embedded in the floc.