1,721,025 research outputs found
La digestione anaerobica: i principi del processo biologico e i criteri di dimensionamento
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Hydrogenotrophic methanogenesis: a promising upgrade bio-technology for WasteWater Treatment Plant
No full textMethod evaluation of extracellular polymeric substances extraction from Anammox granular sludge with compact structure
Full text linkAs a major component of the matrix in granular sludge (GS), extracellular polymeric substance (EPS) is
crucial in formation and stabilization of compact structure. Thus, the selection of appropriate extraction methods is of
great importance, affecting the yield, composition, and the properties of EPS. However, there is still lack of the standard
methods for EPS extraction. In present study, several commonly used methods were applied for extracting EPS
from anaerobic ammonium oxidation (Anammox) GS, and the effectiveness of these methods were evaluated. The
methods of heating, and formaldehyde with NaOH were found to obtain a higher EPS yield rate, compared to the other
methods. The collected EPS was found to mainly consist of proteins (PN) and polysaccharides (PS). The high PN/PS
values obtained in most methods indicated that protein content was substantially enriched in the granules. Moreover,
the dominance of amide bands and/or polysaccharide -associated bands in the EPS was also revealed in the results of
Attenuated total reflectance-Fourier transform infrared spectra
Analisi dei costi di approvvigionamento della materia prima per la produzione di biogas in imprese agro-zootecniche
No full textLa redditività di un impianto a biogas è collegata ai costi di approvvigionamento delle materie prime, se queste rientrino nella definizione di sottoprodotto ovvero di rifiuto, quale quota ciascuna di esse rivesta nella composizione della “dieta” e se l’origine della stessa sia interna o extra-aziendale. Queste variabili, infatti, possono complicare la fase autorizzativa dell’impianto ed aumentare i costi in ingresso ed in uscita della materia prima.
Pertanto, la scelta della “dieta” è tra i momenti decisivi nell’impostazione dell’impianto, da cui cogliere quali possano essere le opportunità per un imprenditore agricolo di inserirsi in una filiera energetica, ovvero in sostituzione (parziale o completa) di acquistare e/o di coltivare specie dedicat
Different approaches to odour emission characterization and impact assessment in wastewater treatment plants
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