Abstract
| Lingua originale | English |
|---|---|
| pagine (da-a) | 311-320 |
| Numero di pagine | 10 |
| Rivista | JOURNAL OF CLEANER PRODUCTION |
| Volume | 202 |
| Stato di pubblicazione | Published - 2018 |
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All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Environmental Science(all)
- Strategy and Management
- Industrial and Manufacturing Engineering
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Membrane Bioreactors for wastewater reuse: Respirometric assessment of biomass activity during a two year survey. / Viviani, Gaspare; Di Trapani, Daniele; Mannina, Giorgio.
In: JOURNAL OF CLEANER PRODUCTION, Vol. 202, 2018, pag. 311-320.Risultato della ricerca: Article
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TY - JOUR
T1 - Membrane Bioreactors for wastewater reuse: Respirometric assessment of biomass activity during a two year survey
AU - Viviani, Gaspare
AU - Di Trapani, Daniele
AU - Mannina, Giorgio
PY - 2018
Y1 - 2018
N2 - Stricter effluent limits, water shortage conditions, land availability requires today even more the needs of advanced wastewater treatments. Attractive solutions come from membrane bioreactors (MBR), Integrated Fixed Film Activated Sludge (IFAS) or combinations (i.e., IFAS-MBRs). One crucial aspect for the applicability of this overall new technology, compared to the conventional activated sludge systems, is the lack of knowledge for design and manage (e.g., kinetic constants, optimal operative conditions etc.). In view of the above frame, the aim of the present study was to assess the kinetic and stoichiometric parameters of bacterial species in MBRs by means of respirometric techniques. Plant configurations, operational conditions and wastewater features (domestic/industrial) were analysed. Four different MBR plants were investigated: i) sequencing batch MBR subjected to a gradual salinity increase; ii) pre-denitrification MBR treating saline wastewater contaminated by hydrocarbons; iii) University of Cape Town (UCT) MBR treating domestic wastewater subjected to a carbon-to-nitrogen (C/N) ratio variation; iiii) UCT- IFAS -MBR treating domestic wastewater. Results show a significant influence on biomass respiratory activity from both plant configurations and operational conditions. The salinity increase severely affected the activity of autotrophic species, while heterotrophic community was mainly influenced by the C/N variation. Moreover, it was observed a specialization in the IFAS-MBR configuration, with the suspended biomass more affine to organic matter, whilst biofilm in the nitrification process. The respirometric analysis confirmed to be an effective tool for the evaluation of the biomass kinetic and stoichiometric parameters. The results of this study can be useful for the application of mathematical models in the design phase and for the monitoring of biomass viability during plant operations.
AB - Stricter effluent limits, water shortage conditions, land availability requires today even more the needs of advanced wastewater treatments. Attractive solutions come from membrane bioreactors (MBR), Integrated Fixed Film Activated Sludge (IFAS) or combinations (i.e., IFAS-MBRs). One crucial aspect for the applicability of this overall new technology, compared to the conventional activated sludge systems, is the lack of knowledge for design and manage (e.g., kinetic constants, optimal operative conditions etc.). In view of the above frame, the aim of the present study was to assess the kinetic and stoichiometric parameters of bacterial species in MBRs by means of respirometric techniques. Plant configurations, operational conditions and wastewater features (domestic/industrial) were analysed. Four different MBR plants were investigated: i) sequencing batch MBR subjected to a gradual salinity increase; ii) pre-denitrification MBR treating saline wastewater contaminated by hydrocarbons; iii) University of Cape Town (UCT) MBR treating domestic wastewater subjected to a carbon-to-nitrogen (C/N) ratio variation; iiii) UCT- IFAS -MBR treating domestic wastewater. Results show a significant influence on biomass respiratory activity from both plant configurations and operational conditions. The salinity increase severely affected the activity of autotrophic species, while heterotrophic community was mainly influenced by the C/N variation. Moreover, it was observed a specialization in the IFAS-MBR configuration, with the suspended biomass more affine to organic matter, whilst biofilm in the nitrification process. The respirometric analysis confirmed to be an effective tool for the evaluation of the biomass kinetic and stoichiometric parameters. The results of this study can be useful for the application of mathematical models in the design phase and for the monitoring of biomass viability during plant operations.
KW - Integrated fixed-film activated sludge-membrane bioreactor; Kinetic and stoichiometric parameters; Mathematical modelling; Membrane bioreactor; Respirometry; Renewable Energy
KW - Leisure and Hospitality Management; Industrial and Manufacturing Engineering
KW - Sustainability and the Environment; 2300; Strategy and Management1409 Tourism
UR - http://hdl.handle.net/10447/298009
UR - https://www.journals.elsevier.com/journal-of-cleaner-production
M3 - Article
VL - 202
SP - 311
EP - 320
JO - JOURNAL OF CLEANER PRODUCTION
JF - JOURNAL OF CLEANER PRODUCTION
SN - 0959-6526
ER -