0000000000109228
AUTHOR
D Di Trapani
Interlinkages between operational conditions and direct and indirect greenhouse gas emissions in a moving bed membrane biofilm reactor
Nitrous oxide (N2O) can be emitted during wastewater treatment contributing to the global warming due to its high global warming potential,. During the last ten years, several efforts have been provided to improve knowledge on: key mechanisms, operating factors and influent features affecting the N2O production/emission. However, the knowledge on the investigated issues is not completely mature. Indeed, in terms of mathematical modelling, literature shows that a reliable model has not yet been established due to the huge data set required and the complexity of the mechanistic models indicated as the most accurate. In this work, the first attempt to perform a multiregression analysis is pres…
Respirometry for the assessment of biomass activity in Membrane Bioreactors
The aim of the study was to use respirometric techniques for the characterization of biomass biokinetic behaviour in several MBR pilot plants characterized by different configurations, different operational conditions and fed with wastewater of different features (domestic/industrial). Four different MBR pilot plants were investigated: i) a sequencing batch MBR (SB-MBR) subjected to a gradual salinity increase; ii) a pre-denitrification MBR system for the treatment of saline wastewater contaminated by hydrocarbons; iii) a University of Cape Town MBR system (UCT-MBR) for the treatment of domestic wastewater subjected to a carbon-to-nitrogen (C/N) ratio variation; iiii) a UCT-IFAS-MBR for the…
VALUTAZIONE DELLA TERAPIA A LUNGO TERMINE CON TADALAFIL IN PZ CON DISFUNZIONE ERETTILE: UPDATE DOPO 6 MESI
Introduzione e obiettivi Caratterizzare, in uno studio prospettico longitudinale su pazienti (pz) con disfunzione erettile (DE) trattati per 6 mesi con Tadalafil (Tad), efficacia, sicurezza, e grado di soddisfazione per il trattamento del pz e della partner. Materiali e metodi Furono arruolati 155 pz (età media 67 anni, range 26-75) con DE, mai trattati (naïve) nel 74% dei casi. La DE, presente da 2 (10%). Del piano terapeutico previsto (totale 9 m) (posologia Tad: iniziale, costante, 20 mg x 2/sett. x 6 m.; proseguimento: 20 mg x 1-2/sett. x altri 3 m. in base a risposta dei primi 6 m. e/o opzione motivata dal pz) riportiamo i dati su efficacia (IIEF5) e soddisfazione (EDITS-paziente; EDIT…
Removal of carbon and nutrients from wastewater in a moving bed membrane biofilm reactor: the influence of the sludge retention time
A University of Cape Town (UCT) pilot plant combining both membrane bioreactor (MBR) and moving bed biofilm reactor (MBBR) technology was monitored. Three experimental Phases were carried out by varying the mixed liquor sludge retention time (SRT) (indefinite, 30 and 15 days, respectively). The system performance has been investigated during experiments in terms of: organic carbon, nitrogen and phosphorus removal, biokinetic/stoichiometric constants, membrane fouling tendency and sludge dewaterability. The observed results showed that by decreasing the SRT the UCT pilot plant was able to maintain very high total COD removal efficiencies, whilst the biological COD removal efficiency showed a…