1,721,323 research outputs found
“Ricerca ed Emergenze Planetarie”
No full textIl volume raccoglie gli Atti del Convegno Nazionale dei Democratici di Sinistra, Firenze, 4 luglio 2005: "DS: Diritto alla scienza. La cultura scientifica in Italia. Quale futuro?", Atti a cura di A. Ranieri e M. Rapallin
La Realizzazione Degli Impianti Di Depurazione Alla Luce Del Nuovo Testo Unico Sulla Tutela Delle Acque Dall’inquinamento
No full textChromium and Nickel Control in Full and Small Scale Subsuperficial Flow Constructed Wetlands
No full textA four-year research program has been carried out to the aim of evaluating the effectiveness of Cr and Ni removal from secondary effluent. Tests were performed in small-scale (10 l/h) and full-scale (150 m3/d) sub-surface flow (SSF) constructed wetlands (cws). Metals removal was also assessed as a function of increased clogging conditions that occur in the cws. Cr and Ni content were evaluated in sediments at various points and in plant tissues by sampling phragmites australis roots, stems, and leaves. Clogging was evaluated by measuring hydraulic conductivity at the same sampling points at the beginning and at the end of the experiment. Residence Time Distribution – RTD - curves were also assessed at the beginning and after 48 months by using lithium chloride as tracer. Plotted results showed an increased skewness in the RTD curves at the end of the experiment. Proportionality between increasing clogging conditions and sediment adsorption was observed, especially for nickel that was absorbed mainly in the roots
La disidratazione meccanica e termica dei fanghi
No full textLa disidratazione è un’operazione fondamentale per la “gestibilità” di un fango di depurazione
ai fini del suo smaltimento e per renderne economicamente sostenibili i costi. Il lavoro in oggetto
prende in considerazione le tecnologie di disidratazione meccanica mediante filtrazione a
presse, nastropressatura e centrifugazione, e termica mediante essiccamento dei fanghi evidenziandone
le prestazioni raggiungibili in funzione della tipologia dei fanghi alimentati ed i
limiti ed i vantaggi della singola applicazione considerata. Vengono inoltre esaminati i particolari
costruttivi ed i costi gestionali di funzionamento. In ultimo vengono illustrate le tecnologie
innovative per la disidratazione meccanica quali Geotube® Container e per la disidratazione
termica quale l’essiccamento a nastro
Phragmites australis metals removal: lab and pilot scale applications
No full textconstructed wetland
Il problema dei metalli nella biomassa
No full textSi tratta della problematica della presenza dei metalli nei fanghi di depurazion
INCINERATION AND SELECTIVE MSW COLLECTION IN TOURIST AREAS IN SOUTHERN ITALY
No full textMunicipal solid waste management is not only a contemporary problem but also an issue at world level. More in detail, the tourist areas are more difficult to be managed. The dynamics of municipal solid waste production in tourist areas is affected from the addition of a significant amount of population equivalent during few months. Consequences are seen in terms of amount of municipal solid waste to be managed, but also on the quality of selective collection. In this paper a case-study is analysed in order to point out some strategies useful for a correct management of the problem
La disinfezione con raggi ultravioletti
No full textDisinfezione con raggi UV metodologie di calcolo e dimensionamento progettual
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