Effect of Molasses on Phenol Removal Rate Using Pilot-Scale Anaerobic Reactors
With the growing industrial and social development through time, toxic substances such as phenol and its derivatives are increasingly released into the environment from a variety of sources. The present study aims to investigate the effects of molasses on phenol removal. For this purpose, five pilot...
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| Format: | Article |
| Language: | English |
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Water and Wastewater Consulting Engineers Research Development
2014-10-01
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| Series: | آب و فاضلاب |
| Subjects: | |
| Online Access: | http://www.wwjournal.ir/article_5605_43bb374ee3f8158e81cb50252d66f2eb.pdf |
| _version_ | 1818349157067259904 |
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| author | Abdollah Dargahi Ali Almasi Mohammad Soltanian parisa Zarei Amir Hossein Hashemian Hafez Golestanifar |
| author_facet | Abdollah Dargahi Ali Almasi Mohammad Soltanian parisa Zarei Amir Hossein Hashemian Hafez Golestanifar |
| author_sort | Abdollah Dargahi |
| collection | DOAJ |
| description | With the growing industrial and social development through time, toxic substances such as phenol and its derivatives are increasingly released into the environment from a variety of sources. The present study aims to investigate the effects of molasses on phenol removal. For this purpose, five pilot scale batch reactors (5 Erlenmeyer flasks equipped with the air and gas diffusion control system) were used in the laboratory scale. The volumes of the reactors were kept constant with a final volume content of 550 ml in each reactor. Phenol with a fixed concentration of 100 mg/l was tested under anaerobic conditions in each reactor in contact with beet molasses (organic matter used as the auxiliary substrate) with COD concentrations of 10000, 5000, 2000, 1000, and 500 mg/l over 5 retention times (10, 20, 30, 40, and 50 days). All the sampling and testing procedures wer e performed according to the standard methods. The results showed that in all the five experimental reactors, increasing retention time was accompanied by a continuous decline in initial phenol and COD concentrations. However, for each retention time, increasing COD concentration led to a decrease in COD removal efficiency such that increasing the initial COD concentration up to a certain level was associated with an increase in chemical oxygen demanding materials, but beyond this range, COD removal decreased slowly. It was also found that phenol removal increased with increasing retention time but it was not proportional to the concentration of the biodegradable COD. After 50 days of contact with 1000 mg/l of the supporting substrate, phenol removal in the reactors reached 98.62%. Another finding of the study was the fact that the highest phenol removal was achieved when 1000-2000 mg/l of biodegradable COD was used over 50 days of retention time |
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| issn | 1024-5936 2383-0905 |
| language | English |
| last_indexed | 2024-12-13T18:01:29Z |
| publishDate | 2014-10-01 |
| publisher | Water and Wastewater Consulting Engineers Research Development |
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| series | آب و فاضلاب |
| spelling | doaj.art-1b111b04fcf34c50befdf9318cb8d3a72022-12-21T23:36:12ZengWater and Wastewater Consulting Engineers Research Developmentآب و فاضلاب1024-59362383-09052014-10-012542125605Effect of Molasses on Phenol Removal Rate Using Pilot-Scale Anaerobic ReactorsAbdollah Dargahi0Ali Almasi1Mohammad Soltanian2parisa Zarei3Amir Hossein Hashemian4Hafez Golestanifar5مربی و عضو هیئت علمی گروه مهندسی بهداشت محیط، عضو مرکز تحقیقات توسعه اجتماعی و ارتقا سلامت، دانشگاه علوم پزشکی خلخال، اردبیلاستاد گروه مهندسی بهداشت محیط، عضو مرکز تحقیقات توسعه اجتماعی و ارتقاء سلامت، دانشگاه علوم پزشکی کرمانشاهاستادیار گروه مهندسی بهداشت محیط، دانشگاه علوم پزشکی کرمانشاهدانش‌آموخته کارشناسی بهداشت محیط، دانشگاه علوم پزشکی کرمانشاهاستادیار گروه آمار زیستی، دانشگاه علوم پزشکی کرمانشاهدانش‌آموخته کارشناسی ارشد مهندسی بهداشت محیط، HSE مدیریت اکتشاف شرکت ملی نفتWith the growing industrial and social development through time, toxic substances such as phenol and its derivatives are increasingly released into the environment from a variety of sources. The present study aims to investigate the effects of molasses on phenol removal. For this purpose, five pilot scale batch reactors (5 Erlenmeyer flasks equipped with the air and gas diffusion control system) were used in the laboratory scale. The volumes of the reactors were kept constant with a final volume content of 550 ml in each reactor. Phenol with a fixed concentration of 100 mg/l was tested under anaerobic conditions in each reactor in contact with beet molasses (organic matter used as the auxiliary substrate) with COD concentrations of 10000, 5000, 2000, 1000, and 500 mg/l over 5 retention times (10, 20, 30, 40, and 50 days). All the sampling and testing procedures wer e performed according to the standard methods. The results showed that in all the five experimental reactors, increasing retention time was accompanied by a continuous decline in initial phenol and COD concentrations. However, for each retention time, increasing COD concentration led to a decrease in COD removal efficiency such that increasing the initial COD concentration up to a certain level was associated with an increase in chemical oxygen demanding materials, but beyond this range, COD removal decreased slowly. It was also found that phenol removal increased with increasing retention time but it was not proportional to the concentration of the biodegradable COD. After 50 days of contact with 1000 mg/l of the supporting substrate, phenol removal in the reactors reached 98.62%. Another finding of the study was the fact that the highest phenol removal was achieved when 1000-2000 mg/l of biodegradable COD was used over 50 days of retention timehttp://www.wwjournal.ir/article_5605_43bb374ee3f8158e81cb50252d66f2eb.pdfphenolMolassesCODAnaerobic Reactor |
| spellingShingle | Abdollah Dargahi Ali Almasi Mohammad Soltanian parisa Zarei Amir Hossein Hashemian Hafez Golestanifar Effect of Molasses on Phenol Removal Rate Using Pilot-Scale Anaerobic Reactors آب و فاضلاب phenol Molasses COD Anaerobic Reactor |
| title | Effect of Molasses on Phenol Removal Rate Using Pilot-Scale Anaerobic Reactors |
| title_full | Effect of Molasses on Phenol Removal Rate Using Pilot-Scale Anaerobic Reactors |
| title_fullStr | Effect of Molasses on Phenol Removal Rate Using Pilot-Scale Anaerobic Reactors |
| title_full_unstemmed | Effect of Molasses on Phenol Removal Rate Using Pilot-Scale Anaerobic Reactors |
| title_short | Effect of Molasses on Phenol Removal Rate Using Pilot-Scale Anaerobic Reactors |
| title_sort | effect of molasses on phenol removal rate using pilot scale anaerobic reactors |
| topic | phenol Molasses COD Anaerobic Reactor |
| url | http://www.wwjournal.ir/article_5605_43bb374ee3f8158e81cb50252d66f2eb.pdf |
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