Intrinsic kinetics for fixed bed bioreactor in hospital wastewater treatment

Variation in hospital wastewater (HWW) pollutants and differences with municipal wastewater (MWW), make the use of biokinetic coefficients obtained from activated sludge in the MWW treatment unprofitable for designing, modeling and evaluation of biological processes for HWW treatment. Since this stu...

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Bibliographic Details
Published in:Water science and technology 2016-10, Vol.74 (8), p.1992-1998
Main Authors: Farrokhi, Mehrdad, Mahdavianpour, Mostafa, Shirzad-Siboni, Mehdi, Naimi-Joubani, Mohammad, Jamali, Hamzeh Ali
Format: Article
Language:English
Subjects:
Activated sludge
Biochemistry
Biodegradation
Biofilms
Biological activity
Biological Oxygen Demand Analysis
Biomass
Bioreactors
Borides
Cellulose
Chemical oxygen demand
Coefficients
Environmental management
Hazardous materials
Hospital wastes
Hospitals
Kinetics
Lignocellulose
Mathematical models
Media
Medical wastes
Microorganisms
Modelling
Municipal wastewater
Oryza
Oxidation
Oxygen demand
Performance evaluation
Pharmaceuticals
Pilot Projects
Pollutants
Process parameters
Removal
Retention
Sewage - analysis
Sludge
Stainless steel
Studies
Waste Disposal, Fluid - instrumentation
Waste Disposal, Fluid - methods
Waste Water - analysis
Wastewater
Wastewater treatment
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Summary:Variation in hospital wastewater (HWW) pollutants and differences with municipal wastewater (MWW), make the use of biokinetic coefficients obtained from activated sludge in the MWW treatment unprofitable for designing, modeling and evaluation of biological processes for HWW treatment. Since this study was conducted to evaluate the performance and biokinetic coefficients of a fixed bed bioreactor (FBBR) using rice husks as fixed media in HWW treatment, a new modified method was also proposed for biokinetic estimation in FBBR processes. For these purposes, five hydraulic retention times along with five sludge retention times were introduced to a pilot setup and the required data were attained. The performance process for chemical oxygen demand (COD) removal was significant (87.8-97.5%) in different conditions. The values of biokinetic coefficients k, K , Y and K were obtained as 2.42 (day ), 55.5 (mgCOD/L), 0.2929 (mgBiomass/mgCOD) and 0.0164 (day ), respectively. The rice husks with high surface area and high affinity for biomass accumulation on its surface are promising media for a green and environmentally friendly FBBR process. The kinetics parameters values are utilizable for modeling of FBBR using rice husks as fixed media in HWW treatment.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2016.399