Successful strategies for increasing energy self-sufficiency at Grüneck wastewater treatment plant in Germany by food waste co-digestion and improved aeration.
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| Title: | Successful strategies for increasing energy self-sufficiency at Grüneck wastewater treatment plant in Germany by food waste co-digestion and improved aeration. |
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| Authors: | Macintosh, C.1 (AUTHOR), Astals, S.1 (AUTHOR), Sembera, C.1 (AUTHOR), Ertl, A.1 (AUTHOR), Drewes, J.E.1 (AUTHOR), Jensen, P.D.1 (AUTHOR), Koch, K.1 (AUTHOR) k.koch@tum.de |
| Source: | Applied Energy. May2019, Vol. 242, p797-808. 12p. |
| Subjects: | Sewage disposal plants, Fertilizers, Self-reliant living, Solar dryers, Wastewater treatment, Anaerobic digestion, Food industrial waste |
| Geographic Terms: | Germany |
| Abstract: | • Grüneck WWTP implemented several strategies to achieve 88% energy self-sufficiency. • Upgrading to rotary lobe blowers reduced net energy consumption by 3.0 kWh PE−1 a−1. • Food waste co-digestion (5.5 t d−1) increased energy production by 5.6 kWh PE−1 a−1. • Co-digestion causes downstream impacts (e.g. reduced dewaterability). • Solar dryer reduced biosolids transportation costs. Population growth, tightening effluent discharge requirements and increasing energy costs are driving the wastewater treatment sector to improve energy efficiency and strive towards energy self-sufficiency. Despite many strategies being proposed for improving energy self-sufficiency at wastewater treatment plants (WWTPs), limited case studies have been conducted. This full-scale case study at Grüneck WWTP evaluates the effectiveness of two different strategies and quantifies their plant-wide impact. Grüneck WWTP increased energy self-sufficiency by 24% (from 64 to 88%) through reducing energy consumption with aeration upgrades (8% increase) and increasing energy production with food waste co-digestion (16% increase). The plant-wide analysis indicated that the aeration upgrades did not affect effluent quality; however co-digesting food waste at 20% additional organic load caused some minor downstream impacts including reduced dewaterability, fluctuating biogas quality and solids accumulation. A solar dryer was installed to manage the increased biosolids production resulting from co-digestion. The dryer reduced biosolids transportation costs by 30% with minimal increase in total plant energy (below 2%). Payback periods for the co-digestion facility and blower upgrade were 10 and 17 months, respectively. The solar dryer, however, has a payback period of 30 years. Findings from this case study provide practical knowledge of the trade-offs for different strategies commonly employed to improve energy self-sufficiency at WWTPs. The results provide evidence that there is significant incentive for similar plants to improve energy self-sufficiency through co-digestion and aeration upgrades. [ABSTRACT FROM AUTHOR] |
| Copyright of Applied Energy is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 136157088 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Successful strategies for increasing energy self-sufficiency at Grüneck wastewater treatment plant in Germany by food waste co-digestion and improved aeration. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Macintosh%2C+C%2E%22">Macintosh, C.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Astals%2C+S%2E%22">Astals, S.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sembera%2C+C%2E%22">Sembera, C.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ertl%2C+A%2E%22">Ertl, A.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Drewes%2C+J%2EE%2E%22">Drewes, J.E.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jensen%2C+P%2ED%2E%22">Jensen, P.D.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Koch%2C+K%2E%22">Koch, K.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> k.koch@tum.de</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Applied+Energy%22">Applied Energy</searchLink>. May2019, Vol. 242, p797-808. 12p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Sewage+disposal+plants%22">Sewage disposal plants</searchLink><br /><searchLink fieldCode="DE" term="%22Fertilizers%22">Fertilizers</searchLink><br /><searchLink fieldCode="DE" term="%22Self-reliant+living%22">Self-reliant living</searchLink><br /><searchLink fieldCode="DE" term="%22Solar+dryers%22">Solar dryers</searchLink><br /><searchLink fieldCode="DE" term="%22Wastewater+treatment%22">Wastewater treatment</searchLink><br /><searchLink fieldCode="DE" term="%22Anaerobic+digestion%22">Anaerobic digestion</searchLink><br /><searchLink fieldCode="DE" term="%22Food+industrial+waste%22">Food industrial waste</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Germany%22">Germany</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: • Grüneck WWTP implemented several strategies to achieve 88% energy self-sufficiency. • Upgrading to rotary lobe blowers reduced net energy consumption by 3.0 kWh PE−1 a−1. • Food waste co-digestion (5.5 t d−1) increased energy production by 5.6 kWh PE−1 a−1. • Co-digestion causes downstream impacts (e.g. reduced dewaterability). • Solar dryer reduced biosolids transportation costs. Population growth, tightening effluent discharge requirements and increasing energy costs are driving the wastewater treatment sector to improve energy efficiency and strive towards energy self-sufficiency. Despite many strategies being proposed for improving energy self-sufficiency at wastewater treatment plants (WWTPs), limited case studies have been conducted. This full-scale case study at Grüneck WWTP evaluates the effectiveness of two different strategies and quantifies their plant-wide impact. Grüneck WWTP increased energy self-sufficiency by 24% (from 64 to 88%) through reducing energy consumption with aeration upgrades (8% increase) and increasing energy production with food waste co-digestion (16% increase). The plant-wide analysis indicated that the aeration upgrades did not affect effluent quality; however co-digesting food waste at 20% additional organic load caused some minor downstream impacts including reduced dewaterability, fluctuating biogas quality and solids accumulation. A solar dryer was installed to manage the increased biosolids production resulting from co-digestion. The dryer reduced biosolids transportation costs by 30% with minimal increase in total plant energy (below 2%). Payback periods for the co-digestion facility and blower upgrade were 10 and 17 months, respectively. The solar dryer, however, has a payback period of 30 years. Findings from this case study provide practical knowledge of the trade-offs for different strategies commonly employed to improve energy self-sufficiency at WWTPs. The results provide evidence that there is significant incentive for similar plants to improve energy self-sufficiency through co-digestion and aeration upgrades. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Applied Energy is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.apenergy.2019.03.126 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 12 StartPage: 797 Subjects: – SubjectFull: Sewage disposal plants Type: general – SubjectFull: Fertilizers Type: general – SubjectFull: Self-reliant living Type: general – SubjectFull: Solar dryers Type: general – SubjectFull: Wastewater treatment Type: general – SubjectFull: Anaerobic digestion Type: general – SubjectFull: Food industrial waste Type: general – SubjectFull: Germany Type: general Titles: – TitleFull: Successful strategies for increasing energy self-sufficiency at Grüneck wastewater treatment plant in Germany by food waste co-digestion and improved aeration. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Macintosh, C. – PersonEntity: Name: NameFull: Astals, S. – PersonEntity: Name: NameFull: Sembera, C. – PersonEntity: Name: NameFull: Ertl, A. – PersonEntity: Name: NameFull: Drewes, J.E. – PersonEntity: Name: NameFull: Jensen, P.D. – PersonEntity: Name: NameFull: Koch, K. IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 05 Text: May2019 Type: published Y: 2019 Identifiers: – Type: issn-print Value: 03062619 Numbering: – Type: volume Value: 242 Titles: – TitleFull: Applied Energy Type: main |
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