The Experts below are selected from a list of 17448 Experts worldwide ranked by ideXlab platform
Zafar M. Khalid - One of the best experts on this subject based on the ideXlab platform.
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Treatment of Oil Refinery Wastewater Using Pilot Scale Fed Batch Reactor Followed by Coagulation and Sand Filtration
American Journal of Environmental Protection, 2013Co-Authors: Ghulam Shabir, Muhammad Afzal, Razia Tahseen, Samina Iqbal, Qaiser M. Khan, Zafar M. KhalidAbstract:The current study evaluates the performance of a pilot scale fed batch reactor (FBR), followed by coagulation and sand filtration, for the treatment of an Oil Refinery wastewater. The total reductions in COD, BOD, Oil contents and phenol were 95.11%, 94.30%, 99.47% and 100%, respectively, with FBR followed by coagulation and sand filtration. This FBR-coagulation-sand filtration treatment system also removed the toxicity from the Oil Refinery wastewater. Treated wastewater by this approach meets National Environmental Quality Standards (NEQS) of Pakistan, and can be safely released into the environment.
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treatment of Oil Refinery wastewater using pilot scale fed batch reactor followed by coagulation and sand filtration
American Journal of Environmental Protection, 2013Co-Authors: Ghulam Shabir, Muhammad Afzal, Razia Tahseen, Samina Iqbal, Qaiser M. Khan, Zafar M. KhalidAbstract:The current study evaluates the performance of a pilot scale fed batch reactor (FBR), followed by coagulation and sand filtration, for the treatment of an Oil Refinery wastewater. The total reductions in COD, BOD, Oil contents and phenol were 95.11%, 94.30%, 99.47% and 100%, respectively, with FBR followed by coagulation and sand filtration. This FBR-coagulation-sand filtration treatment system also removed the toxicity from the Oil Refinery wastewater. Treated wastewater by this approach meets National Environmental Quality Standards (NEQS) of Pakistan, and can be safely released into the environment.
Shaohui Guo - One of the best experts on this subject based on the ideXlab platform.
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potential and optimization of two phase anaerobic digestion of Oil Refinery waste activated sludge and microbial community study
Scientific Reports, 2016Co-Authors: Qinghong Wang, Ying Liang, Peng Zhao, Shaohui Guo, Chunmao ChenAbstract:Oil Refinery waste activated sludge produced from Oil wastewater biological treatment is a major industrial sludge. Two-phase anaerobic digestion of Oil Refinery waste activated sludge was studied for the first time. Thermal pretreatment under 170 °C is effective on sludge solubilization. At the optimum hydrolytic-acidogenic condition which was pH of 6.5, temperature of 55 °C and HRT of 2 days, 2754 mg/L volatile fatty acids (VFAs) were produced and acetic acid and butyric acid were the key components. Comparative studies of single-phase and two-phase anaerobic digestion in terms of organic removal, biogas production and methane concentration were conducted. The cumulative methane production and soluble COD (SCOD) removal efficiency in the two-phase system were 228 mL/g COD added and 77.8%, respectively, which were 1.6 and 2.1 times higher than those in single-phase anaerobic digestion. Such improved performance is attributed to intensification of dominant microbial population in separated reactors. Caloramator, Ureibacillus, Dechloromonas, Petrobacter, and T78 played important roles in hydrolytic-acidification and Oil-organics degradation. Syntrophic bacteria in the family Porphyromonadaceae and the genus Anaerobranca provide acetate for methanogen. The results demonstrated the potential and operating condition of two-phase anaerobic digestion in treatment of Oil Refinery waste activated sludge.
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an alternative anaerobic treatment process for treatment of heavy Oil Refinery wastewater containing polar organics
Biochemical Engineering Journal, 2016Co-Authors: Yu Wang, Qinghong Wang, Yingnan Yang, Guangxu Yan, Shaohui GuoAbstract:Abstract Heavy Oil is an important part of energy sources, but the refining wastewater is difficult to treat by the conventional anaerobic process, which has low efficiency and poor ability to resist impact load. In this study, an up-flow anaerobic sludge bed (UASB) reactor was applied to treat heavy Oil Refinery wastewater containing large amounts of polar organics. Through a progressive increase of hydraulic conditions, the average removal efficiencies of COD and total Oil reached 70% and 72%, respectively, at an organic loading rate (OLR) of 3.44 kg COD/m 3 d. GC–MS analysis revealed that more biodegradable organic acids and alcohols were generated and macromolecular polar organics were degraded into small molecular intermediates after UASB treatment. The morphology observation of the sludge demonstrated that granular sludge with an average particle size of 1 mm was formed. Moreover, the predominant species and microbial community shift could reflect the performance of the reactor. The long-term operation of UASB exhibited excellent polar organic removal efficiency. The study demonstrated the potential of UASB as an alternative for high-efficiency anaerobic treatment of heavy Oil Refinery wastewater.
A Perrotta - One of the best experts on this subject based on the ideXlab platform.
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Pleural mesothelioma and asbestos exposure among Italian Oil Refinery workers.
Scandinavian journal of work environment & health, 1994Co-Authors: Valerio Gennaro, Marcello Ceppi, Paolo Boffetta, V. Fontana, A PerrottaAbstract:OBJECTIVES--The association between asbestos exposure and risk of mesothelioma was studied among workers from two Oil refineries located in the northern Italian cities of Genoa and La Spezia, given that previous cohort analyses revealed two clusters of mesotheliomas and that international cohort studies have so far not reported an excess of this neoplasm among Oil Refinery workers. METHODS--Men (N = 2300) who had been employed between 1914 and 1988 in two Oil refineries located in northern Italy were studied. The follow-up covered the mortality of 639 white-collar and 1661 blue-collar from 1950 to 1991. RESULTS--Among the cases, the median duration of employment was 14.5 years, and the median time since first employment was 27.5 years. The job titles of the 10 men with pleural mesothelioma were maintenance worker (seven men), electrician (one man) and unspecified blue-collar worker (two men). Blue-collar workers experienced a significantly increased risk of pleural neoplasms, five deaths in each plant, in respect to both the provincial [standardized mortality ratio (SMR) 266] and national (SMR 1663) reference populations. The SMR, based on eight deaths, was 320 for workers with more than 10 years of employment and 20 years since first exposure. CONCLUSIONS--The results uphold the notion that exposure to asbestos in Oil refineries causes pleural mesotheliomas. This is the first study to find an excess of pleural mesotheliomas among Oil Refinery workers exposed to asbestos.
Ghulam Shabir - One of the best experts on this subject based on the ideXlab platform.
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Treatment of Oil Refinery Wastewater Using Pilot Scale Fed Batch Reactor Followed by Coagulation and Sand Filtration
American Journal of Environmental Protection, 2013Co-Authors: Ghulam Shabir, Muhammad Afzal, Razia Tahseen, Samina Iqbal, Qaiser M. Khan, Zafar M. KhalidAbstract:The current study evaluates the performance of a pilot scale fed batch reactor (FBR), followed by coagulation and sand filtration, for the treatment of an Oil Refinery wastewater. The total reductions in COD, BOD, Oil contents and phenol were 95.11%, 94.30%, 99.47% and 100%, respectively, with FBR followed by coagulation and sand filtration. This FBR-coagulation-sand filtration treatment system also removed the toxicity from the Oil Refinery wastewater. Treated wastewater by this approach meets National Environmental Quality Standards (NEQS) of Pakistan, and can be safely released into the environment.
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treatment of Oil Refinery wastewater using pilot scale fed batch reactor followed by coagulation and sand filtration
American Journal of Environmental Protection, 2013Co-Authors: Ghulam Shabir, Muhammad Afzal, Razia Tahseen, Samina Iqbal, Qaiser M. Khan, Zafar M. KhalidAbstract:The current study evaluates the performance of a pilot scale fed batch reactor (FBR), followed by coagulation and sand filtration, for the treatment of an Oil Refinery wastewater. The total reductions in COD, BOD, Oil contents and phenol were 95.11%, 94.30%, 99.47% and 100%, respectively, with FBR followed by coagulation and sand filtration. This FBR-coagulation-sand filtration treatment system also removed the toxicity from the Oil Refinery wastewater. Treated wastewater by this approach meets National Environmental Quality Standards (NEQS) of Pakistan, and can be safely released into the environment.
Qinghong Wang - One of the best experts on this subject based on the ideXlab platform.
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potential and optimization of two phase anaerobic digestion of Oil Refinery waste activated sludge and microbial community study
Scientific Reports, 2016Co-Authors: Qinghong Wang, Ying Liang, Peng Zhao, Shaohui Guo, Chunmao ChenAbstract:Oil Refinery waste activated sludge produced from Oil wastewater biological treatment is a major industrial sludge. Two-phase anaerobic digestion of Oil Refinery waste activated sludge was studied for the first time. Thermal pretreatment under 170 °C is effective on sludge solubilization. At the optimum hydrolytic-acidogenic condition which was pH of 6.5, temperature of 55 °C and HRT of 2 days, 2754 mg/L volatile fatty acids (VFAs) were produced and acetic acid and butyric acid were the key components. Comparative studies of single-phase and two-phase anaerobic digestion in terms of organic removal, biogas production and methane concentration were conducted. The cumulative methane production and soluble COD (SCOD) removal efficiency in the two-phase system were 228 mL/g COD added and 77.8%, respectively, which were 1.6 and 2.1 times higher than those in single-phase anaerobic digestion. Such improved performance is attributed to intensification of dominant microbial population in separated reactors. Caloramator, Ureibacillus, Dechloromonas, Petrobacter, and T78 played important roles in hydrolytic-acidification and Oil-organics degradation. Syntrophic bacteria in the family Porphyromonadaceae and the genus Anaerobranca provide acetate for methanogen. The results demonstrated the potential and operating condition of two-phase anaerobic digestion in treatment of Oil Refinery waste activated sludge.
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an alternative anaerobic treatment process for treatment of heavy Oil Refinery wastewater containing polar organics
Biochemical Engineering Journal, 2016Co-Authors: Yu Wang, Qinghong Wang, Yingnan Yang, Guangxu Yan, Shaohui GuoAbstract:Abstract Heavy Oil is an important part of energy sources, but the refining wastewater is difficult to treat by the conventional anaerobic process, which has low efficiency and poor ability to resist impact load. In this study, an up-flow anaerobic sludge bed (UASB) reactor was applied to treat heavy Oil Refinery wastewater containing large amounts of polar organics. Through a progressive increase of hydraulic conditions, the average removal efficiencies of COD and total Oil reached 70% and 72%, respectively, at an organic loading rate (OLR) of 3.44 kg COD/m 3 d. GC–MS analysis revealed that more biodegradable organic acids and alcohols were generated and macromolecular polar organics were degraded into small molecular intermediates after UASB treatment. The morphology observation of the sludge demonstrated that granular sludge with an average particle size of 1 mm was formed. Moreover, the predominant species and microbial community shift could reflect the performance of the reactor. The long-term operation of UASB exhibited excellent polar organic removal efficiency. The study demonstrated the potential of UASB as an alternative for high-efficiency anaerobic treatment of heavy Oil Refinery wastewater.
