Nitrogen (N) and phosphorus (P) are nutrients for the growth of living cells. Their presence is essential for biological treatment of domestic wastewater. However, uncontrolled discharge of nutrients with treated effluent from wastewater treatment plants leads to eutrophication– a condition that promotes growth of undesirable aquatic plants and adversely impacts the quality and aesthetic of the receiving bodies water. To address the increasing regulatory requirements for nutrient control from treatment plant discharges utilities around the globe implement advanced wastewater treatment processes for N and P removal. Among various configurations of biological wastewater treatment reactors Sequencing Batch Reactors (SBR) have been demonstrated as an effective technology for nutrient control. SBR conducts all functions of treatment process including BOD oxidation, nitrification, denitrification, enhanced biological phosphorus removal (EBPR) and clarification of the mixed liquor in the same reactor tank. SBR operates in repeating cycles, each consisting of the above steps in series. Each step carries out a specific biochemical reaction to fulfill the overall treatment goal. The cyclic and stepwise operation of an SBR is precisely controlled by a Programmable Logic Controller (PLC). This paper presents a case study of successful nutrient control by SBR with the help of automatic real time process control by a PLC. It discusses the working principle of SBR and the function of each process step. The test program consisted of continuous monitoring of multiple process parameters to monitor the removal of BOD, TSS and nutrients, in each cycle of the sequencing batch reactor (SBR) at the wastewater treatment plant. On-line, real time, monitoring of pH, oxidation reduction potential (ORP), dissolved oxygen (DO), ammonia-N, nitrite-N, nitrate-N and orthophosphate-P demonstrated excellent correspondence between these parameters and the individual biochemical reactions in each step. Subsequently, the SBR cycle control logic was changed from time and DO based, to ORP based. This demonstrated the potential for a higher energy efficiency in plant operation while maintaining the effluent quality in compliance with the state regulation for BOD, TSS, TN, TP of 5, 5, 3 and 1 mg/L, respectively.
| Published in | American Journal of Water Science and Engineering (Volume 8, Issue 4) |
| DOI | 10.11648/j.ajwse.20220804.12 |
| Page(s) | 79-88 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2024. Published by Science Publishing Group |
SBR, ORP, DO, Biological Treatment, Nutrients Control
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APA Style
Somnath Basu. (2022). On-Line Monitoring and Process Control of SBR Cycles for Nutrient Control from Wastewater. American Journal of Water Science and Engineering, 8(4), 79-88. https://doi.org/10.11648/j.ajwse.20220804.12
ACS Style
Somnath Basu. On-Line Monitoring and Process Control of SBR Cycles for Nutrient Control from Wastewater. Am. J. Water Sci. Eng. 2022, 8(4), 79-88. doi: 10.11648/j.ajwse.20220804.12
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Download@article{10.11648/j.ajwse.20220804.12,
author = {Somnath Basu},
title = {On-Line Monitoring and Process Control of SBR Cycles for Nutrient Control from Wastewater},
journal = {American Journal of Water Science and Engineering},
volume = {8},
number = {4},
pages = {79-88},
doi = {10.11648/j.ajwse.20220804.12},
url = {https://doi.org/10.11648/j.ajwse.20220804.12},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajwse.20220804.12},
abstract = {Nitrogen (N) and phosphorus (P) are nutrients for the growth of living cells. Their presence is essential for biological treatment of domestic wastewater. However, uncontrolled discharge of nutrients with treated effluent from wastewater treatment plants leads to eutrophication– a condition that promotes growth of undesirable aquatic plants and adversely impacts the quality and aesthetic of the receiving bodies water. To address the increasing regulatory requirements for nutrient control from treatment plant discharges utilities around the globe implement advanced wastewater treatment processes for N and P removal. Among various configurations of biological wastewater treatment reactors Sequencing Batch Reactors (SBR) have been demonstrated as an effective technology for nutrient control. SBR conducts all functions of treatment process including BOD oxidation, nitrification, denitrification, enhanced biological phosphorus removal (EBPR) and clarification of the mixed liquor in the same reactor tank. SBR operates in repeating cycles, each consisting of the above steps in series. Each step carries out a specific biochemical reaction to fulfill the overall treatment goal. The cyclic and stepwise operation of an SBR is precisely controlled by a Programmable Logic Controller (PLC). This paper presents a case study of successful nutrient control by SBR with the help of automatic real time process control by a PLC. It discusses the working principle of SBR and the function of each process step. The test program consisted of continuous monitoring of multiple process parameters to monitor the removal of BOD, TSS and nutrients, in each cycle of the sequencing batch reactor (SBR) at the wastewater treatment plant. On-line, real time, monitoring of pH, oxidation reduction potential (ORP), dissolved oxygen (DO), ammonia-N, nitrite-N, nitrate-N and orthophosphate-P demonstrated excellent correspondence between these parameters and the individual biochemical reactions in each step. Subsequently, the SBR cycle control logic was changed from time and DO based, to ORP based. This demonstrated the potential for a higher energy efficiency in plant operation while maintaining the effluent quality in compliance with the state regulation for BOD, TSS, TN, TP of 5, 5, 3 and 1 mg/L, respectively.},
year = {2022}
}
TY - JOUR T1 - On-Line Monitoring and Process Control of SBR Cycles for Nutrient Control from Wastewater AU - Somnath Basu Y1 - 2022/12/29 PY - 2022 N1 - https://doi.org/10.11648/j.ajwse.20220804.12 DO - 10.11648/j.ajwse.20220804.12 T2 - American Journal of Water Science and Engineering JF - American Journal of Water Science and Engineering JO - American Journal of Water Science and Engineering SP - 79 EP - 88 PB - Science Publishing Group SN - 2575-1875 UR - https://doi.org/10.11648/j.ajwse.20220804.12 AB - Nitrogen (N) and phosphorus (P) are nutrients for the growth of living cells. Their presence is essential for biological treatment of domestic wastewater. However, uncontrolled discharge of nutrients with treated effluent from wastewater treatment plants leads to eutrophication– a condition that promotes growth of undesirable aquatic plants and adversely impacts the quality and aesthetic of the receiving bodies water. To address the increasing regulatory requirements for nutrient control from treatment plant discharges utilities around the globe implement advanced wastewater treatment processes for N and P removal. Among various configurations of biological wastewater treatment reactors Sequencing Batch Reactors (SBR) have been demonstrated as an effective technology for nutrient control. SBR conducts all functions of treatment process including BOD oxidation, nitrification, denitrification, enhanced biological phosphorus removal (EBPR) and clarification of the mixed liquor in the same reactor tank. SBR operates in repeating cycles, each consisting of the above steps in series. Each step carries out a specific biochemical reaction to fulfill the overall treatment goal. The cyclic and stepwise operation of an SBR is precisely controlled by a Programmable Logic Controller (PLC). This paper presents a case study of successful nutrient control by SBR with the help of automatic real time process control by a PLC. It discusses the working principle of SBR and the function of each process step. The test program consisted of continuous monitoring of multiple process parameters to monitor the removal of BOD, TSS and nutrients, in each cycle of the sequencing batch reactor (SBR) at the wastewater treatment plant. On-line, real time, monitoring of pH, oxidation reduction potential (ORP), dissolved oxygen (DO), ammonia-N, nitrite-N, nitrate-N and orthophosphate-P demonstrated excellent correspondence between these parameters and the individual biochemical reactions in each step. Subsequently, the SBR cycle control logic was changed from time and DO based, to ORP based. This demonstrated the potential for a higher energy efficiency in plant operation while maintaining the effluent quality in compliance with the state regulation for BOD, TSS, TN, TP of 5, 5, 3 and 1 mg/L, respectively. VL - 8 IS - 4 ER -
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