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  1. Article ; Online: Recovery of humic acids from anaerobic sewage sludge: Extraction, characterization and encapsulation in alginate beads.

    Cristina, Giulio / Camelin, Enrico / Ottone, Carminna / Fraterrigo Garofalo, Silvia / Jorquera, Lorena / Castro, Mónica / Fino, Debora / Schiappacasse, María Cristina / Tommasi, Tonia

    International journal of biological macromolecules

    2020  Volume 164, Page(s) 277–285

    Abstract: Wastewater production is rising all over the world and one of the most difficult problems is the disposal of sewage sludge (SS). It is known that SS contains certain quantities of added-value compounds, such as humic acids (HA) which in turn have ... ...

    Abstract Wastewater production is rising all over the world and one of the most difficult problems is the disposal of sewage sludge (SS). It is known that SS contains certain quantities of added-value compounds, such as humic acids (HA) which in turn have beneficial effects on soil quality and plant growth. On the other hand, SS can retain many pollutants, such as heavy metals. The present work aimed to implement an HA alkaline extraction protocol from anaerobic sewage sludge (ASS). Subsequently, the HA were quantified in ASS, in HA extract and in commercial HA, used as a benchmark, which gave results of 12.53%, 26.87% and 77.87% (on dry matter basis), respectively. FESEM and EDX analyses on lyophilized HA extract confirmed that no heavy metals had passed into the extract. Afterwards, in order to allow controlled release of the HA in soils, alginate beads containing the HA extract were created. Finally, a pot experiment in a greenhouse was performed using Chilean lettuce plants (Lactuca sativa L.) treated with alginate-HA extract beads. At the end of the greenhouse experiments, the hypogean dry biomass of the treated plants was significantly higher than for non-treated plants. The relevance of this study relies not only on the exploitation of green chemistry principles, by converting a waste stream into a high-value product, but also on the application of an approach following a circular economy model.
    MeSH term(s) Alginates/chemistry ; Anaerobiosis ; Chemical Fractionation ; Chemical Phenomena ; Humic Substances ; Microspheres ; Sewage/chemistry ; Spectroscopy, Fourier Transform Infrared
    Chemical Substances Alginates ; Humic Substances ; Sewage
    Language English
    Publishing date 2020-07-14
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 282732-3
    ISSN 1879-0003 ; 0141-8130
    ISSN (online) 1879-0003
    ISSN 0141-8130
    DOI 10.1016/j.ijbiomac.2020.07.097
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Influence of hydraulic retention time on the psychrophilic hydrolysis/acidogenesis of proteins.

    Poirrier, Paola / Schiappacasse, María Cristina / Carballa, Marta / Lema, Juan M

    Water science and technology : a journal of the International Association on Water Pollution Research

    2016  Volume 74, Issue 10, Page(s) 2399–2406

    Abstract: The influence of the hydraulic retention time (HRT) on the anaerobic hydrolysis of complex substrates has been studied under psychrophilic conditions. For this purpose, a continuous stirred tank reactor was operated at 15 °C and neutral pH and gelatin ... ...

    Abstract The influence of the hydraulic retention time (HRT) on the anaerobic hydrolysis of complex substrates has been studied under psychrophilic conditions. For this purpose, a continuous stirred tank reactor was operated at 15 °C and neutral pH and gelatin was considered as a model protein. Three HRTs have been tested: 12, 21 and 36 h. Gelatin hydrolysis was greatly dependent on HRT, increasing from 40% at 12 h-HRT to a maximum of 65% at 36 h-HRT. Molecular size distribution analyses of the effluent showed that hydrolysation of compounds larger than 10 kDa was poor at 12 h-HRT, whereas the fraction of 1-10 kDa was completely transformed into compounds smaller than 1 kDa. Higher HRT (36 h) improved the degradation of the recalcitrant fraction (>10 kDa), obtaining an effluent with around 95% of soluble molecules (<1 kDa). In that way, the use of membrane bioreactors for the treatment of this type of macromolecules could improve the degradation efficiencies by enabling to increase the residence time of the non-hydrolyzed molecules, with what would be possible to achieve higher organic loading rate operation.
    MeSH term(s) Bioreactors ; Fatty Acids, Volatile/metabolism ; Gelatin/metabolism ; Hydrogen-Ion Concentration ; Hydrolysis ; Waste Water/chemistry ; Water Pollutants/metabolism
    Chemical Substances Fatty Acids, Volatile ; Waste Water ; Water Pollutants ; Gelatin (9000-70-8)
    Language English
    Publishing date 2016-11
    Publishing country England
    Document type Journal Article
    ZDB-ID 764273-8
    ISSN 1996-9732 ; 0273-1223
    ISSN (online) 1996-9732
    ISSN 0273-1223
    DOI 10.2166/wst.2016.425
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Recovery of humic acids from anaerobic sewage sludge: Extraction, characterization and encapsulation in alginate beads

    Cristina, Giulio / Camelin, Enrico / Ottone, Carminna / Fraterrigo Garofalo, Silvia / Jorquera, Lorena / Castro, Mónica / Fino, Debora / Schiappacasse, María Cristina / Tommasi, Tonia

    International journal of biological macromolecules. 2020 Dec. 01, v. 164

    2020  

    Abstract: Wastewater production is rising all over the world and one of the most difficult problems is the disposal of sewage sludge (SS). It is known that SS contains certain quantities of added-value compounds, such as humic acids (HA) which in turn have ... ...

    Abstract Wastewater production is rising all over the world and one of the most difficult problems is the disposal of sewage sludge (SS). It is known that SS contains certain quantities of added-value compounds, such as humic acids (HA) which in turn have beneficial effects on soil quality and plant growth. On the other hand, SS can retain many pollutants, such as heavy metals. The present work aimed to implement an HA alkaline extraction protocol from anaerobic sewage sludge (ASS). Subsequently, the HA were quantified in ASS, in HA extract and in commercial HA, used as a benchmark, which gave results of 12.53%, 26.87% and 77.87% (on dry matter basis), respectively. FESEM and EDX analyses on lyophilized HA extract confirmed that no heavy metals had passed into the extract. Afterwards, in order to allow controlled release of the HA in soils, alginate beads containing the HA extract were created. Finally, a pot experiment in a greenhouse was performed using Chilean lettuce plants (Lactuca sativa L.) treated with alginate-HA extract beads. At the end of the greenhouse experiments, the hypogean dry biomass of the treated plants was significantly higher than for non-treated plants. The relevance of this study relies not only on the exploitation of green chemistry principles, by converting a waste stream into a high-value product, but also on the application of an approach following a circular economy model.
    Keywords Lactuca sativa ; alginates ; biomass ; circular economy ; encapsulation ; freeze drying ; green chemistry ; greenhouse experimentation ; greenhouses ; lettuce ; plant growth ; sewage sludge ; soil quality ; wastewater
    Language English
    Dates of publication 2020-1201
    Size p. 277-285.
    Publishing place Elsevier B.V.
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 282732-3
    ISSN 1879-0003 ; 0141-8130
    ISSN (online) 1879-0003
    ISSN 0141-8130
    DOI 10.1016/j.ijbiomac.2020.07.097
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Cologne/Königswinter

    Zs.B 2374: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
    ab Jg. 2022: Lesesaal (EG)

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

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