Disinfection of Digestate Effluents Using Photocatalytic Nanofiltration
The disinfection properties of photocatalysis on liquid digestate derived from biogas plants have been investigated for the first time. The study presents the physiological characteristics of liquid digestate retrieved from various biogas plants based in northern Greece, revealing the heterogeneity...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-07-01
|
| Series: | Fermentation |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2311-5637/9/7/662 |
| _version_ | 1797589349418663936 |
|---|---|
| author | Afroditi G. Chioti Georgia Sarikaki Vasiliki Tsioni Eleni Kostopoulou George Em. Romanos Polycarpos Falaras Themistoklis Sfetsas |
| author_facet | Afroditi G. Chioti Georgia Sarikaki Vasiliki Tsioni Eleni Kostopoulou George Em. Romanos Polycarpos Falaras Themistoklis Sfetsas |
| author_sort | Afroditi G. Chioti |
| collection | DOAJ |
| description | The disinfection properties of photocatalysis on liquid digestate derived from biogas plants have been investigated for the first time. The study presents the physiological characteristics of liquid digestate retrieved from various biogas plants based in northern Greece, revealing the heterogeneity of this matrix. Preliminary photocatalysis experiments conducted on inoculated liquid digestate samples showed that disinfection was possible when a pre-treated digestate underwent a combination of centrifuge–flocculation–μfiltration after 5.5 h with 0.7 g/L suspended TiO<sub>2</sub> under UVA illumination. To explore the feasibility of an industrial application based on this concept, a novel design photocatalytic nanofiltration reactor was implemented for disinfection experiments on pre-treated liquid digestate. The synergistic action of photocatalysis during nanofiltration alleviated the leakage phenomena, and both the retentate and permeate effluents had lower concentrations of pathogens by approximately 1–2 log<sub>10</sub> cfu/mL. This work sets out the basis for the efficient operation and engineering application of collaborative technology, with photocatalysis as the final step for liquid digestate sanitation and reusable water recovery. |
| first_indexed | 2024-03-11T01:05:21Z |
| format | Article |
| id | doaj.art-110905e0fbeb4c0cb3483ac26498ac8c |
| institution | Directory Open Access Journal |
| issn | 2311-5637 |
| language | English |
| last_indexed | 2024-03-11T01:05:21Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Fermentation |
| spelling | doaj.art-110905e0fbeb4c0cb3483ac26498ac8c2023-11-18T19:16:38ZengMDPI AGFermentation2311-56372023-07-019766210.3390/fermentation9070662Disinfection of Digestate Effluents Using Photocatalytic NanofiltrationAfroditi G. Chioti0Georgia Sarikaki1Vasiliki Tsioni2Eleni Kostopoulou3George Em. Romanos4Polycarpos Falaras5Themistoklis Sfetsas6QLAB Private Company, Research & Development, Quality Control and Testing Services, 57008 Thessaloniki, GreeceQLAB Private Company, Research & Development, Quality Control and Testing Services, 57008 Thessaloniki, GreeceQLAB Private Company, Research & Development, Quality Control and Testing Services, 57008 Thessaloniki, GreeceQLAB Private Company, Research & Development, Quality Control and Testing Services, 57008 Thessaloniki, GreeceInstitute of Nanoscience and Nanotechnology, National Center of Scientific Research “Demokritos”, Agia Paraskevi, 15310 Athens, GreeceInstitute of Nanoscience and Nanotechnology, National Center of Scientific Research “Demokritos”, Agia Paraskevi, 15310 Athens, GreeceQLAB Private Company, Research & Development, Quality Control and Testing Services, 57008 Thessaloniki, GreeceThe disinfection properties of photocatalysis on liquid digestate derived from biogas plants have been investigated for the first time. The study presents the physiological characteristics of liquid digestate retrieved from various biogas plants based in northern Greece, revealing the heterogeneity of this matrix. Preliminary photocatalysis experiments conducted on inoculated liquid digestate samples showed that disinfection was possible when a pre-treated digestate underwent a combination of centrifuge–flocculation–μfiltration after 5.5 h with 0.7 g/L suspended TiO<sub>2</sub> under UVA illumination. To explore the feasibility of an industrial application based on this concept, a novel design photocatalytic nanofiltration reactor was implemented for disinfection experiments on pre-treated liquid digestate. The synergistic action of photocatalysis during nanofiltration alleviated the leakage phenomena, and both the retentate and permeate effluents had lower concentrations of pathogens by approximately 1–2 log<sub>10</sub> cfu/mL. This work sets out the basis for the efficient operation and engineering application of collaborative technology, with photocatalysis as the final step for liquid digestate sanitation and reusable water recovery.https://www.mdpi.com/2311-5637/9/7/662disinfectionindicator pathogensTiO<sub>2</sub> photocatalysisphotocatalytic nanofiltration reactormembrane filtrationanaerobic digestion |
| spellingShingle | Afroditi G. Chioti Georgia Sarikaki Vasiliki Tsioni Eleni Kostopoulou George Em. Romanos Polycarpos Falaras Themistoklis Sfetsas Disinfection of Digestate Effluents Using Photocatalytic Nanofiltration Fermentation disinfection indicator pathogens TiO<sub>2</sub> photocatalysis photocatalytic nanofiltration reactor membrane filtration anaerobic digestion |
| title | Disinfection of Digestate Effluents Using Photocatalytic Nanofiltration |
| title_full | Disinfection of Digestate Effluents Using Photocatalytic Nanofiltration |
| title_fullStr | Disinfection of Digestate Effluents Using Photocatalytic Nanofiltration |
| title_full_unstemmed | Disinfection of Digestate Effluents Using Photocatalytic Nanofiltration |
| title_short | Disinfection of Digestate Effluents Using Photocatalytic Nanofiltration |
| title_sort | disinfection of digestate effluents using photocatalytic nanofiltration |
| topic | disinfection indicator pathogens TiO<sub>2</sub> photocatalysis photocatalytic nanofiltration reactor membrane filtration anaerobic digestion |
| url | https://www.mdpi.com/2311-5637/9/7/662 |
| work_keys_str_mv | AT afroditigchioti disinfectionofdigestateeffluentsusingphotocatalyticnanofiltration AT georgiasarikaki disinfectionofdigestateeffluentsusingphotocatalyticnanofiltration AT vasilikitsioni disinfectionofdigestateeffluentsusingphotocatalyticnanofiltration AT elenikostopoulou disinfectionofdigestateeffluentsusingphotocatalyticnanofiltration AT georgeemromanos disinfectionofdigestateeffluentsusingphotocatalyticnanofiltration AT polycarposfalaras disinfectionofdigestateeffluentsusingphotocatalyticnanofiltration AT themistoklissfetsas disinfectionofdigestateeffluentsusingphotocatalyticnanofiltration |