Premium
Biodegradation of pretreated olive mill effluent in mixture with a domestic sewage or compatible wastewater stream
Author(s) -
Salimi Khaligh Sooddeh,
Yagci Nevin,
UbayCokgor Emine,
Karaca Cansu,
Alli Busra,
Orhon Derin,
Sözen Seval
Publication year - 2017
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.5114
Subject(s) - effluent , wastewater , biodegradation , sewage , pulp and paper industry , chemistry , biomass (ecology) , sewage treatment , substrate (aquarium) , dilution , ultrafiltration (renal) , chromatography , environmental science , environmental engineering , biology , organic chemistry , ecology , agronomy , physics , thermodynamics , engineering
BACKGROUND The study focused on the biodegradation of pretreated olive mill wastewater ( OMW ) properly diluted in and mixed with a biodegradable substrate and/or domestic sewage stream. It utilized the permeate of a chemically conditioned two‐stage ultrafiltration/nanofiltration system with COD of 5700 mg L −1 and a total phenol content of 100 mg L −1 . Peptone mixture with similar characteristics to domestic sewage was adopted as the biodegradable synthetic substrate. The study relied on two sets of microbial culture; one acclimated to peptone and the other to a mixture of peptone and domestic sewage. Respirometric analyses were conducted on pretreated OMW diluted in the selected substrate using corresponding biomass seeding. RESULTS Model evaluation of the oxygen uptake rate profiles indicated that the pretreated OMW was fully consumed in the respirometric tests. There were no inhibitory/toxic impacts of OMW dosing on the biomass. The entire biomass participated in the utilization of OMW /substrate with no metabolic adjustment problems. CONCLUSION Experimental results provided conclusive evidence that co‐treatment with a domestic sewage stream is a viable option for OMW management, after a chemically conditioned two‐stage filtration used as the pretreatment step. Pretreatment removes the recalcitrant nature of the wastewater, which becomes fully biodegradable under appropriate dilution and mixing conditions. © 2016 Society of Chemical Industry