Start-up and operation of novel EN-MBBR system for sidestreams treatment and sensitivity analysis modeling using GPS-X simulation
Worldwide, most treatment systems are retuning sidestreams to the wastewater treatment plant head without treatment. This study established an innovative process to separately treat all sidestream lines (supernatant gravity thickener, underflow mechanical thickener, and centrate) away from plant mai...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-12-01
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| Series: | Alexandria Engineering Journal |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1110016822002885 |
| _version_ | 1797978767322251264 |
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| author | Ahmed M. Faris Haider M. Zwain Majid Hosseinzadeh Hasan Sh. Majdi Seyed Mostafa Siadatmousavi |
| author_facet | Ahmed M. Faris Haider M. Zwain Majid Hosseinzadeh Hasan Sh. Majdi Seyed Mostafa Siadatmousavi |
| author_sort | Ahmed M. Faris |
| collection | DOAJ |
| description | Worldwide, most treatment systems are retuning sidestreams to the wastewater treatment plant head without treatment. This study established an innovative process to separately treat all sidestream lines (supernatant gravity thickener, underflow mechanical thickener, and centrate) away from plant mainstream and return treated sidestream effluents to plant wastewater outfall instead of wastewater head. It aims to start up and operate a novel EN-MBBR to eliminate sidestreams impacts on a full-scale A2/O sewage treatment plant. The effects of DO, RAS, and media portion on the reactor were modeled using GPS-X. The system successfully started and reached a steady-state in 28 days. The pilot system processed 30 m3/d of the sidestreams, and the average of 8 months effluent concentrations for COD, BOD, TSS, PO4, NH4, NO2, NO3, H2S were 55, 4, 11, 0.16, 0.2, 0.17, 100, and 0.11 mg/L, respectively. Adding 3 kg/day of calcium hydroxide contributed to improving the nitrification process and reducing phosphates from 40 mg/L to 0.16 mg/L, but it caused an initial shock to the system that lasted more than a week, and then it was stabilized. Modeling results showed that DO concentrations affected the nitrification process but stabilized at a concentration of 3 mg/L. When operating the EN-MBBR as an EN-IFAS system, the RAS has positively contributed to reducing sludge in this system, whereas the sludge proportion is reduced by 60%. The media portion had a significant effect on the removal of nutrients, as it gave the best results when the rate of reactor filling with carriers was between 40 and 50%. |
| first_indexed | 2024-04-11T05:29:19Z |
| format | Article |
| id | doaj.art-7799fcbeea6b402b97fa3a9a0feabbcb |
| institution | Directory Open Access Journal |
| issn | 1110-0168 |
| language | English |
| last_indexed | 2024-04-11T05:29:19Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Alexandria Engineering Journal |
| spelling | doaj.art-7799fcbeea6b402b97fa3a9a0feabbcb2022-12-23T04:38:44ZengElsevierAlexandria Engineering Journal1110-01682022-12-0161121080510818Start-up and operation of novel EN-MBBR system for sidestreams treatment and sensitivity analysis modeling using GPS-X simulationAhmed M. Faris0Haider M. Zwain1Majid Hosseinzadeh2Hasan Sh. Majdi3Seyed Mostafa Siadatmousavi4School of Civil Engineering, Iran University of Science and Technology, Narmak, Tehran 1684613114, Iran; Kerbala Sewerage Directorate, 56001 Kerbala, IraqCollege of Water Resources Engineering, Al-Qasim Green University, Al-Qasim Province 51001, Babylon, IraqSchool of Civil Engineering, Iran University of Science and Technology, Narmak, Tehran 1684613114, Iran; Corresponding author.Department of Chemical Engineering and Petroleum Industries, Al-Mustaqbal University College, 51001 Hillah, Babylon, IraqSchool of Civil Engineering, Iran University of Science and Technology, Narmak, Tehran 1684613114, IranWorldwide, most treatment systems are retuning sidestreams to the wastewater treatment plant head without treatment. This study established an innovative process to separately treat all sidestream lines (supernatant gravity thickener, underflow mechanical thickener, and centrate) away from plant mainstream and return treated sidestream effluents to plant wastewater outfall instead of wastewater head. It aims to start up and operate a novel EN-MBBR to eliminate sidestreams impacts on a full-scale A2/O sewage treatment plant. The effects of DO, RAS, and media portion on the reactor were modeled using GPS-X. The system successfully started and reached a steady-state in 28 days. The pilot system processed 30 m3/d of the sidestreams, and the average of 8 months effluent concentrations for COD, BOD, TSS, PO4, NH4, NO2, NO3, H2S were 55, 4, 11, 0.16, 0.2, 0.17, 100, and 0.11 mg/L, respectively. Adding 3 kg/day of calcium hydroxide contributed to improving the nitrification process and reducing phosphates from 40 mg/L to 0.16 mg/L, but it caused an initial shock to the system that lasted more than a week, and then it was stabilized. Modeling results showed that DO concentrations affected the nitrification process but stabilized at a concentration of 3 mg/L. When operating the EN-MBBR as an EN-IFAS system, the RAS has positively contributed to reducing sludge in this system, whereas the sludge proportion is reduced by 60%. The media portion had a significant effect on the removal of nutrients, as it gave the best results when the rate of reactor filling with carriers was between 40 and 50%.http://www.sciencedirect.com/science/article/pii/S1110016822002885EN-MBBRGPS-XModelingSidestream linesStart-up process |
| spellingShingle | Ahmed M. Faris Haider M. Zwain Majid Hosseinzadeh Hasan Sh. Majdi Seyed Mostafa Siadatmousavi Start-up and operation of novel EN-MBBR system for sidestreams treatment and sensitivity analysis modeling using GPS-X simulation Alexandria Engineering Journal EN-MBBR GPS-X Modeling Sidestream lines Start-up process |
| title | Start-up and operation of novel EN-MBBR system for sidestreams treatment and sensitivity analysis modeling using GPS-X simulation |
| title_full | Start-up and operation of novel EN-MBBR system for sidestreams treatment and sensitivity analysis modeling using GPS-X simulation |
| title_fullStr | Start-up and operation of novel EN-MBBR system for sidestreams treatment and sensitivity analysis modeling using GPS-X simulation |
| title_full_unstemmed | Start-up and operation of novel EN-MBBR system for sidestreams treatment and sensitivity analysis modeling using GPS-X simulation |
| title_short | Start-up and operation of novel EN-MBBR system for sidestreams treatment and sensitivity analysis modeling using GPS-X simulation |
| title_sort | start up and operation of novel en mbbr system for sidestreams treatment and sensitivity analysis modeling using gps x simulation |
| topic | EN-MBBR GPS-X Modeling Sidestream lines Start-up process |
| url | http://www.sciencedirect.com/science/article/pii/S1110016822002885 |
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