Efficiency limiting factors of petrochemical wastewater treatment using hybrid biological reactor

The wastewater characteristics and some operational control parameters limit the efficiency of attached growth processes for petrochemical wastewater treatment. This study aims to determine the efficiency of a hybrid biological reactor treating actual petrochemical wastewater and to identify the eff...

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Published inJournal of environmental engineering and landscape management Vol. 30; no. 3; pp. 380 - 392
Main Authors Ahmed, Mohd Elmuntasir, Mydlarczyk, Andrzej, Al-Haddad, Adel
Format Journal Article
LanguageEnglish
Published Vilnius Vilnius Gediminas Technical University 07.10.2022
Subjects
Anaerobic conditions
Anoxic conditions
Biochemical oxygen demand
Biodegradation
Biofilms
biological treatment
Careers
Chemical oxygen demand
Dissolved oxygen
Efficiency
Flow rates
Flow velocity
hybrid biological reactors
Hydraulic retention time
industrial wastewater treatment
integrated film activated sludge
Limiting factors
Loading rate
mixed growth biological processes
Nutrient loading
Nutrient removal
Organic carbon
Organic loading
Oxygen
Oxygen requirement
petrochemical wastewater
Petrochemicals
Petrochemicals industry
Petroleum chemicals
Purification
Reactors
Removal
Retention time
Sewage
Sludge
Total organic carbon
Total oxygen demand
Wastewater treatment
Water treatment
hybrid biological reactors
biological treatment
petrochemical wastewater
pilot study
industrial wastewater treatment
integrated film activated sludge
mixed growth biological processes
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ISSN1648-6897
1822-4199
DOI10.3846/jeelm.2022.17633

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Abstract The wastewater characteristics and some operational control parameters limit the efficiency of attached growth processes for petrochemical wastewater treatment. This study aims to determine the efficiency of a hybrid biological reactor treating actual petrochemical wastewater and to identify the efficiency determining factors. An up-flow biological reactor filled with bio-career was operated at two flow rates, two dissolved oxygen (DO) levels, and under anaerobic conditions. Due to the varying characteristics of actual petrochemical wastewater, efficiency limitations were manifested in many ways. However, the highest chemical oxygen demand and biochemical oxygen demand (BOD) removal efficiencies were 77.2% and 78.5%, respectively, and were achieved under aerobic operation at organic loading rates (OLRs) of 0.2 kg-COD/m3/d and hydraulic retention time (HRT) of 26.67 h (DO 4.0 mg/l). Anaerobically, the highest efficiency was 41.7 for both at 0.18 kg-COD/m3/d and 400 ml/min. The total organic carbon (TOC) removal stability was attributed to the presence of toxic chemicals and removal mechanisms other than biodegradation, as it tapered off at high loading. The nutrient removal efficiency was marginal, conceivably due to the high organics to nutrient ratio and toxic conditions of the wastewater promoting nutrient removal inside the biofilm.
AbstractList The wastewater characteristics and some operational control parameters limit the efficiency of attached growth processes for petrochemical wastewater treatment. This study aims to determine the efficiency of a hybrid biological reactor treating actual petrochemical wastewater and to identify the efficiency determining factors. An up-flow biological reactor filled with bio-career was operated at two flow rates, two dissolved oxygen (DO) levels, and under anaerobic conditions. Due to the varying characteristics of actual petrochemical wastewater, efficiency limitations were manifested in many ways. However, the highest chemical oxygen demand and biochemical oxygen demand (BOD) removal efficiencies were 77.2% and 78.5%, respectively, and were achieved under aerobic operation at organic loading rates (OLRs) of 0.2 kg-COD/m3/d and hydraulic retention time (HRT) of 26.67 h (DO 4.0 mg/l). Anaerobically, the highest efficiency was 41.7 for both at 0.18 kg-COD/m3/d and 400 ml/min. The total organic carbon (TOC) removal stability was attributed to the presence of toxic chemicals and removal mechanisms other than biodegradation, as it tapered off at high loading. The nutrient removal efficiency was marginal, conceivably due to the high organics to nutrient ratio and toxic conditions of the wastewater promoting nutrient removal inside the biofilm.
The wastewater characteristics and some operational control parameters limit the efficiency of attached growth processes for petrochemical wastewater treatment. This study aims to determine the efficiency of a hybrid biological reactor treating actual petrochemical wastewater and to identify the efficiency determining factors. An up-flow biological reactor filled with bio-career was operated at two flow rates, two dissolved oxygen (DO) levels, and under anaerobic conditions. Due to the varying characteristics of actual petrochemical wastewater, efficiency limitations were manifested in many ways. However, the highest chemical oxygen demand and biochemical oxygen demand (BOD) removal efficiencies were 77.2% and 78.5%, respectively, and were achieved under aerobic operation at organic loading rates (OLRs) of 0.2 kg-COD/[m.sup.3]/d and hydraulic retention time (HRT) of 26.67 h (DO 4.0 mg/l). Anaerobically, the highest efficiency was 41.7 for both at 0.18 kg-COD/[m.sup.3]/d and 400 ml/min. The total organic carbon (TOC) removal stability was attributed to the presence of toxic chemicals and removal mechanisms other than biodegradation, as it tapered off at high loading. The nutrient removal efficiency was marginal, conceivably due to the high organics to nutrient ratio and toxic conditions of the wastewater promoting nutrient removal inside the biofilm. Keywords: biological treatment, industrial wastewater treatment, integrated film activated sludge, hybrid biological reactors, mixed growth biological processes, petrochemical wastewater, pilot study.
Audience Academic
Author Mydlarczyk, Andrzej
Al-Haddad, Adel
Ahmed, Mohd Elmuntasir
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  organization: Water Research Center, Kuwait Institute for Scientific Research, P.O. Box 24885, 13109 Safat, Kuwait
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Issue 3
Keywords hybrid biological reactors
biological treatment
petrochemical wastewater
pilot study
industrial wastewater treatment
integrated film activated sludge
mixed growth biological processes
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  start-page: 373
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  article-title: Wastewater treatment in a hybrid biological reactor (HBR): Nitrification characteristics
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  doi: 10.1016/j.biortech.2007.02.037
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Snippet The wastewater characteristics and some operational control parameters limit the efficiency of attached growth processes for petrochemical wastewater...
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SubjectTerms Anaerobic conditions
Anoxic conditions
Biochemical oxygen demand
Biodegradation
Biofilms
biological treatment
Careers
Chemical oxygen demand
Dissolved oxygen
Efficiency
Flow rates
Flow velocity
hybrid biological reactors
Hydraulic retention time
industrial wastewater treatment
integrated film activated sludge
Limiting factors
Loading rate
mixed growth biological processes
Nutrient loading
Nutrient removal
Organic carbon
Organic loading
Oxygen
Oxygen requirement
petrochemical wastewater
Petrochemicals
Petrochemicals industry
Petroleum chemicals
Purification
Reactors
Removal
Retention time
Sewage
Sludge
Total organic carbon
Total oxygen demand
Wastewater treatment
Water treatment
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Title Efficiency limiting factors of petrochemical wastewater treatment using hybrid biological reactor
URI https://journals.vilniustech.lt/index.php/JEELM/article/view/17633
https://www.proquest.com/docview/2746533376
https://doaj.org/article/83cdb3a05ba44e36aa07fab10ede2424
Volume 30
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