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Activated sludge treatment of synthetic wastewater containing pentachlorophenol
Author(s) -
Edgehill Richard U.,
Finn Robert K.
Publication year - 1983
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.260250905
Subject(s) - pentachlorophenol , chemostat , activated sludge , acclimatization , chemistry , hydraulic retention time , arthrobacter , wastewater , sewage treatment , pulp and paper industry , environmental chemistry , chromatography , environmental science , biology , environmental engineering , bacteria , biochemistry , ecology , engineering , genetics , enzyme
Activated sludge treatment of a pentachlorophenol (PCP)‐containing synthetic waste was examined. With a waste containing some sugars, and 40–120 mg/L PCP, laboratory activated sludge required about seven days for acclimation. However, the prior addition of a quasipure culture of PCP‐metabolizing Arthrobacter resulted in immediate acclimation. Even with acclimated sludge, however, the system was upset for two days by a simple step change from 40 to 120 mg/L of PCP. The stability of the system to such a shock load was considerably improved when a chemostat culture of the PCP‐metabolizing Arthrobacter was fed slowly into the mixed liquor. Kinetic models were developed to describe the dynamic response of the system in terms of growth parameters, hydraulic detention time, sludge age, and bleed‐in rate from the chemostat.