Document Details
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Document Type |
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Thesis |
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Document Title |
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Biological Treatment of Wastewater from Leather Tanning Industry, Jeddah المعالجة الحيوية لمياه الصرف من صناعة دباغة الجلود بجدة |
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Subject |
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biological sciences department |
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Document Language |
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Arabic |
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Abstract |
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The study aimed to investigate the ability of biological treatment to decontaminate tannery wastewater in terms of removal capacity and efficiency using indigenous and/or exogenous bacteria. Water samples were collected from Tanning Factory, Jeddah during the course of the study. Three indigenous isolated from tannery effluent and 3 exogenous bacteria were identified using traditional biochemical profiling as well as molecular characterization and used in the remediation of that effluent as free living (batch mode) either individual or as mixed culture and also as biofilm (fixed mode). Wastewater quality parameters including pH, temperature, DO, TSS, TDS, BOD, COD, FOG, H2S, NH3, NO3, bacterial TVC and total Cr were determined before and after treatment and the removal efficiencies were calculated. Results indicated that the raw tannery effluents used during this study had extremely high levels of all the tested parameters. This makes it one of the strongest industrial effluents that has high pollution potential and dangerous effects on the receiving environments and also creates many difficulties in its treatment. Batch treatment of tannery effluent for 7 days was time and bacterial species dependent with Pseudomonas stutzeri (PS) considered the most efficient for all the tested parameters. However, although high removals were achieved, the residual levels of all the parameters still above the MPL for the safe discharge. Therefore, this bacterium was selected, fixed on white stone as supporting material and used as biofilm system to enhance the treatment of the tannery effluent and to bring it to the safe limits for the environment. This has led many advantages over its planktonic free living counterpart. It enhances the bacterial growth, reduces wastewater toxicity, increases bacterial resistance, remarkably increases removal efficiencies towards the involved contaminants and reduces the treatment time, a character which is extremely important in wastewater treatment. However, some of the parameters still had high residual concentrations due to the very short time (5 h) of the treatment. To overcome this problem, it is recommended to 1) using of 2 or 3 biofilm units in sequence or increasing the exposure times; and 2) using a pre or post oxidation step that helps the biological treatment to reach acceptable limits for safe discharge. And finally, results of the present study confirmed that the proposed biofilm system with the highly active bacterium Pseudomonas stutzeri represents a very promising, renewable and cheap biotechnology for the treatment of wide range of contaminated effluents not only in the industrial sector but also for domestic and agricultural wastewater. |
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Supervisor |
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Prof. Fahad Abdul Rahman Al-Fassy |
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Thesis Type |
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Master Thesis |
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Publishing Year |
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1433 AH
2012 AD |
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Co-Supervisor |
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dr.Ebtesam Abd El-Hamid El-Bestawy |
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Added Date |
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Tuesday, May 1, 2012 |
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Researchers
| رهام محمد ابوركبة | Aburokba, Reham Mohammed | Researcher | Master | |
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