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Article: Impact of a Pretreatment Step on the Acidogenic Fermentation of Spent Coffee Grounds.

Pereira, Joana / de Melo, Marcelo M R / Silva, Carlos M / Lemos, Paulo C / Serafim, Luísa S

2022 Volume 9, Issue 8

Abstract: Acidogenic fermentation (AF) is often applied to wastes to produce short-chain organic acids (SCOAs)-molecules with applications in many industries. Spent coffee grounds (SCGs) are a residue from the coffee industry that is rich in carbohydrates, having ... ...

Abstract	Acidogenic fermentation (AF) is often applied to wastes to produce short-chain organic acids (SCOAs)-molecules with applications in many industries. Spent coffee grounds (SCGs) are a residue from the coffee industry that is rich in carbohydrates, having the potential to be valorized by this process. However, given the recalcitrant nature of this waste, the addition of a pretreatment step can significantly improve AF. In this work, several pretreatment strategies were applied to SCGs (acidic hydrolysis, basic hydrolysis, hydrothermal, microwave, ultrasounds, and supercritical CO
Language	English
Publishing date	2022-08-03
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2746191-9
ISSN	2306-5354
ISSN	2306-5354
DOI	10.3390/bioengineering9080362
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Article ; Online: Microbial selection strategies for polyhydroxyalkanoates production from crude glycerol: Effect of OLR and cycle length.

Freches, André / Lemos, Paulo C

New biotechnology

2017 Volume 39, Issue Pt A, Page(s) 22–28

Abstract: Crude glycerol from biodiesel manufacture can be used as carbon source for microbial fermentations. The production of polyhydroxyalkanoates by manipulating the Sequencing Batch Reactor (SBR) selection stage of microbial mixed cultures (MMC) using high ... ...

Abstract	Crude glycerol from biodiesel manufacture can be used as carbon source for microbial fermentations. The production of polyhydroxyalkanoates by manipulating the Sequencing Batch Reactor (SBR) selection stage of microbial mixed cultures (MMC) using high organic loading rates (OLR, 50CmM/day) and different cycles lengths (6, 12 and 24h) were optimized. Batch-production of polyhydroxybutyrate (PHB) presented an accumulation capacity in the high range (0.44g/g) after 3 pulses of 50CmM, with a final content of 59% PHB/wt., for the culture selected with 50CmM/day and a 24h cycle length. These values were in the range to those obtained with pure cultures and higher than the ones for MMC. With this strategy three main advantages in terms of the PHA production can be considered: utilization of a real waste without the resort to pure microbial cultures and a pre-fermentation step, consolidating the role of MMC in the valorisation of complex wastes/by-products.
Language	English
Publishing date	2017-10-25
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	2400836-9
ISSN	1876-4347 ; 1871-6784
ISSN (online)	1876-4347
ISSN	1871-6784
DOI	10.1016/j.nbt.2017.05.011
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Article ; Online: FISH in Suspension or in Adherent Cells.

Di Pippo, Francesca / Queirós, Diogo / Pereira, Joana / Lemos, Paulo C / Serafim, Luísa S / Rossetti, Simona

Methods in molecular biology (Clifton, N.J.)

2021 Volume 2246, Page(s) 51–67

Abstract: Fluorescence in situ hybridization (FISH) enables the detection and enumeration of microorganisms in a diversity of samples. Short-length oligonucleotide DNA probes complementary to 16S or 23S rRNA sequences are generally used to target different ... ...

Abstract	Fluorescence in situ hybridization (FISH) enables the detection and enumeration of microorganisms in a diversity of samples. Short-length oligonucleotide DNA probes complementary to 16S or 23S rRNA sequences are generally used to target different phylogenetic levels. The protocol for the application of FISH to aggregated or suspended cells in mixed microbial communities is described in this chapter, with a special emphasis on environmental samples.
MeSH term(s)	In Situ Hybridization, Fluorescence/methods ; Microbiota/genetics ; Oligonucleotide Probes/genetics ; Phylogeny ; RNA, Ribosomal, 16S/genetics ; RNA, Ribosomal, 23S/genetics
Chemical Substances	Oligonucleotide Probes ; RNA, Ribosomal, 16S ; RNA, Ribosomal, 23S
Language	English
Publishing date	2021-03-17
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ISSN	1940-6029
ISSN (online)	1940-6029
DOI	10.1007/978-1-0716-1115-9_4
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Article ; Online: Enzymatic Potential of Filamentous Fungi as a Biological Pretreatment for Acidogenic Fermentation of Coffee Waste.

Pereira, Joana / Cachinho, Ana / de Melo, Marcelo M R / Silva, Carlos M / Lemos, Paulo C / Xavier, Ana M R B / Serafim, Luísa S

Biomolecules

2022 Volume 12, Issue 9

Abstract: Spent coffee grounds (SCGs) are a promising substrate that can be valorized by biotechnological processes, such as for short-chain organic acid (SCOA) production, but their complex structure implies the application of a pretreatment step to increase ... ...

Abstract	Spent coffee grounds (SCGs) are a promising substrate that can be valorized by biotechnological processes, such as for short-chain organic acid (SCOA) production, but their complex structure implies the application of a pretreatment step to increase their biodegradability. Physicochemical pretreatments are widely studied but have multiple drawbacks. An alternative is the application of biological pretreatments that include using fungi
MeSH term(s)	Carbon Dioxide/metabolism ; Coffee/chemistry ; Fermentation ; Hydrolysis ; Trametes/metabolism
Chemical Substances	Coffee ; Carbon Dioxide (142M471B3J)
Language	English
Publishing date	2022-09-12
Publishing country	Switzerland
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2701262-1
ISSN	2218-273X ; 2218-273X
ISSN (online)	2218-273X
ISSN	2218-273X
DOI	10.3390/biom12091284
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Article: Enrichment of a mixed microbial culture of PHA-storing microorganisms by using fermented hardwood spent sulfite liquor

Pereira, Joana / Queirós, Diogo / Lemos, Paulo C / Rossetti, Simona / Serafim, Luísa S

New biotechnology. 2020 May 25, v. 56

2020

Abstract: Pulp and paper factories produce several residues that can be explored and valorized through polyhydroxyalkanoate (PHA) production via a three-step process. The objective of this work was focused on the selection step. Acidified hardwood spent sulfite ... ...

Abstract	Pulp and paper factories produce several residues that can be explored and valorized through polyhydroxyalkanoate (PHA) production via a three-step process. The objective of this work was focused on the selection step. Acidified hardwood spent sulfite liquor (HSSL), a fermented waste stream from a pulp and paper factory, was used to select a mixed microbial culture (MMC) in a sequencing batch reactor (SBR) operated for 156 days under different operational conditions. The MMC adapted to the imposed conditions, revealing its robustness whenever the operational parameters were changed. Feast-to-Famine ratio was kept below or equal to 0.2, with constant production of a copolymer of P(3HB-co-3 HV), and with storage contents values over 30 %. Changes in the operational conditions, namely cycle length, and organic load rate (OLR), successfully led to the selection of an MMC with a stable accumulation capacity and an increased biomass concentration. Next Generation Sequencing analysis was performed on samples collected during the SBR operational period. The analysis of the microbial composition of the MMC showed a rise in PHA-accumulating bacteria over time. Acidovorax and Comamonas species were found mainly to drive the PHA storage process during the first two periods of operation. After an increase in the OLR, in the last period, a shift towards Comamonas dominance occurred, suggesting a higher tolerance to the inhibitory compounds of the HSSL for this genus.
Keywords	Acidovorax ; Comamonas ; bacteria ; batch systems ; biomass ; composite polymers ; hardwood ; high-throughput nucleotide sequencing ; microbial culture ; polyhydroxyalkanoates ; pulp and paper mills ; sulfite liquor
Language	English
Dates of publication	2020-0525
Size	p. 79-86.
Publishing place	Elsevier B.V.
Document type	Article
ZDB-ID	2400836-9
ISSN	1876-4347 ; 1871-6784
ISSN (online)	1876-4347
ISSN	1871-6784
DOI	10.1016/j.nbt.2019.12.003
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Article ; Online: Pyrethroid pesticide metabolite, 3-PBA, in soils: method development and application to real agricultural soils.

Bragança, Idalina / Lemos, Paulo C / Delerue-Matos, Cristina / Domingues, Valentina F

Environmental science and pollution research international

2018 Volume 26, Issue 3, Page(s) 2987–2997

Abstract: 3-Phenoxybenzoic acid (3-PBA) is a shared metabolite of several synthetic pyrethroid pesticides (SPs) resulting from environmental degradation of parent compounds and thus occurs frequently as a residue in samples. Hence, the importance of 3-PBA ... ...

Abstract	3-Phenoxybenzoic acid (3-PBA) is a shared metabolite of several synthetic pyrethroid pesticides (SPs) resulting from environmental degradation of parent compounds and thus occurs frequently as a residue in samples. Hence, the importance of 3-PBA evaluation after pyrethroid application. There is a gap of analytical methods to determine 3-PBA in soil samples. Therefore, an analytical method that combines the solid-phase extraction (SPE) and gas chromatography-mass spectrometry (GC/MS) detection has been developed for the determination of 3-PBA in soil samples. The analytical method was validated in terms of linearity, sensitivity, intra- and inter-day batch precisions, recoveries, and quantification limits. An SPE method using a Strata X cartridge allows obtaining limits of detection and quantification equal to 4.0 and 13.3 ng g
MeSH term(s)	Agriculture ; Benzoates/analysis ; Gas Chromatography-Mass Spectrometry/methods ; Limit of Detection ; Pesticide Residues/analysis ; Portugal ; Reproducibility of Results ; Sensitivity and Specificity ; Soil Pollutants/analysis ; Solid Phase Extraction/methods
Chemical Substances	Benzoates ; Pesticide Residues ; Soil Pollutants ; 3-phenoxybenzoic acid (69DC2655VH)
Language	English
Publishing date	2018-11-30
Publishing country	Germany
Document type	Journal Article
ZDB-ID	1178791-0
ISSN	1614-7499 ; 0944-1344
ISSN (online)	1614-7499
ISSN	0944-1344
DOI	10.1007/s11356-018-3690-7
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Article: Assessment of Pyrethroid Pesticides in Topsoils in Northern Portugal

Bragança, Idalina / Lemos, Paulo C / Delerue-Matos, Cristina / Domingues, Valentina F

Water, air, and soil pollution. 2019 July, v. 230, no. 7

2019

Abstract: Pyrethroid insecticides are emerging contaminants broadly used for insect pest control in agriculture, veterinary, and domestic applications. Limited information can be found in literature regarding pyrethroid pesticide soil contamination in playgrounds ... ...

Abstract	Pyrethroid insecticides are emerging contaminants broadly used for insect pest control in agriculture, veterinary, and domestic applications. Limited information can be found in literature regarding pyrethroid pesticide soil contamination in playgrounds and agricultural areas. The focus of this study was on new findings related to the spatial and seasonal occurrence of pyrethroid pesticide contamination in soils of northern Portugal. The soils were tested during summer and winter seasons. Pyrethroid pesticides were not found in the ten playgrounds sampled during both seasons. For the 18 agricultural soil samples tested, deltamethrin was the only pyrethroid detected, just during the summer season. For those, three of the samples taken were found to be positive with concentrations between 15.7 and 101.7 ng g−1. The results denote the need for monitoring and assessment of pyrethroid pesticide contamination in Portuguese soil. Further research is needed to access the ecological potential impact of pyrethroid pesticides on soil. Graphical Abstract
Keywords	agricultural land ; agricultural soils ; deltamethrin ; insect control ; insect pests ; monitoring ; playgrounds ; pyrethrins ; soil pollution ; soil sampling ; summer ; topsoil ; winter ; Portugal
Language	English
Dates of publication	2019-07
Size	p. 166.
Publishing place	Springer International Publishing
Document type	Article
ZDB-ID	120499-3
ISSN	1573-2932 ; 0049-6979 ; 0043-1168
ISSN (online)	1573-2932
ISSN	0049-6979 ; 0043-1168
DOI	10.1007/s11270-019-4209-7
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Enrichment of a mixed microbial culture of PHA-storing microorganisms by using fermented hardwood spent sulfite liquor.

Pereira, Joana / Queirós, Diogo / Lemos, Paulo C / Rossetti, Simona / Serafim, Luísa S

New biotechnology

2019 Volume 56, Page(s) 79–86

Abstract	Pulp and paper factories produce several residues that can be explored and valorized through polyhydroxyalkanoate (PHA) production via a three-step process. The objective of this work was focused on the selection step. Acidified hardwood spent sulfite liquor (HSSL), a fermented waste stream from a pulp and paper factory, was used to select a mixed microbial culture (MMC) in a sequencing batch reactor (SBR) operated for 156 days under different operational conditions. The MMC adapted to the imposed conditions, revealing its robustness whenever the operational parameters were changed. Feast-to-Famine ratio was kept below or equal to 0.2, with constant production of a copolymer of P(3HB-co-3 HV), and with storage contents values over 30 %. Changes in the operational conditions, namely cycle length, and organic load rate (OLR), successfully led to the selection of an MMC with a stable accumulation capacity and an increased biomass concentration. Next Generation Sequencing analysis was performed on samples collected during the SBR operational period. The analysis of the microbial composition of the MMC showed a rise in PHA-accumulating bacteria over time. Acidovorax and Comamonas species were found mainly to drive the PHA storage process during the first two periods of operation. After an increase in the OLR, in the last period, a shift towards Comamonas dominance occurred, suggesting a higher tolerance to the inhibitory compounds of the HSSL for this genus.
MeSH term(s)	Bioreactors ; Comamonadaceae/metabolism ; Comamonas/metabolism ; Fermentation ; Microbial Consortia ; Polychlorinated Biphenyls/metabolism ; Sulfites/metabolism
Chemical Substances	Sulfites ; Polychlorinated Biphenyls (DFC2HB4I0K)
Language	English
Publishing date	2019-12-12
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	2400836-9
ISSN	1876-4347 ; 1871-6784
ISSN (online)	1876-4347
ISSN	1871-6784
DOI	10.1016/j.nbt.2019.12.003
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Article: Sustainable cement mortar bioformulated with a bioproduct obtained from fermentation of biodiesel’ crude glycerol

García-González, Julia / Faria, Paulina / Pereira, Alice S. / Lemos, Paulo C. / Morán-del Pozo, Julia Mª / Guerra-Romero, M. Ignacio / Juan-Valdés, Andrés

Journal of cleaner production. 2021 Sept. 01, v. 313

2021

Abstract: This study analyses the potential of a new eco-friendly bioproduct to construction sustainability and its contribution for improving the fresh and hardened properties of cement mortar. The bioproduct was obtained from biomass grown using crude glycerol ( ... ...

Abstract	This study analyses the potential of a new eco-friendly bioproduct to construction sustainability and its contribution for improving the fresh and hardened properties of cement mortar. The bioproduct was obtained from biomass grown using crude glycerol (biodiesel production waste). With similar functionality than petrochemical-based additions, these bioproducts encourage the decrease on the use of fossil-based raw materials with the concomitant reduction in their carbon footprint. The effect of bioproduct's sonication and storage for 3 day at 4 °C were assessed. Properties such as consistence, porosity, density, compressive and flexural strength, water droplet absorption, capillary absorption, drying rate, thermal conductivity and ultrasonic pulse velocity of the bioformulated mortars were compared with a control cement mortar. The findings show that the bioproducts can be used as renewable and eco-friendly alternative to petrochemical-based polymer admixtures to lengthen mortar service life, even after storage. Sonicated bioproduct improved the water related mortar properties, while non-sonicated bioproduct developed higher mechanical properties. Contributing for a cleaner production of cementitious products, an original waste from chemical industry was transformed into a valuable raw material for use in the construction industry.
Keywords	absorption ; biodiesel ; biomass ; carbon footprint ; cement ; chemical industry ; construction industry ; droplets ; durability ; fermentation ; glycerol ; modulus of rupture ; polymers ; porosity ; raw materials ; sonication ; thermal conductivity ; ultrasonics ; wastes
Language	English
Dates of publication	2021-0901
Publishing place	Elsevier Ltd
Document type	Article
ISSN	0959-6526
DOI	10.1016/j.jclepro.2021.127885
Database	NAL-Catalogue (AGRICOLA)

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Article: Biotreatments Using Microbial Mixed Cultures with Crude Glycerol and Waste Pinewood as Carbon Sources: Influence of Application on the Durability of Recycled Concrete.

Serrano-González, Lorena / Merino-Maldonado, Daniel / Antolín-Rodríguez, Andrea / Lemos, Paulo C / Pereira, Alice S / Faria, Paulina / Juan-Valdés, Andrés / García-González, Julia / Morán-Del Pozo, Julia Mª

Materials (Basel, Switzerland)

2022 Volume 15, Issue 3

Abstract: Two eco-friendly healing bioproducts generated from microbial mixed cultures (MMC) for the production of polyhydroxyalkanoates (PHA) were used as surface treatments, with two residual materials used as the substrates, namely crude glycerol and pinewood ... ...

Abstract	Two eco-friendly healing bioproducts generated from microbial mixed cultures (MMC) for the production of polyhydroxyalkanoates (PHA) were used as surface treatments, with two residual materials used as the substrates, namely crude glycerol and pinewood bio-oil. Their ability to improve the durability of concrete samples containing recycled aggregates was assessed. To determine this protective capacity, 180 samples were analyzed using different tests, such as water penetration under pressure, capillary absorption, freeze-thaw and water droplet absorption test. Three types of conditions were used: outdoor-indoor exposure, re-application of biopolymers and application in vertical exposure conditions. The results showed reductions of up to 50% in the water penetration test and a delay in the water droplet absorption test of up to 150 times relative to the reference. The surface application of these bioproducts significantly reduced the degree of water penetration in recycled concrete, increasing its useful lifespan and proving to be a promising treatment for protecting concrete surfaces.
Language	English
Publishing date	2022-02-03
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2487261-1
ISSN	1996-1944
ISSN	1996-1944
DOI	10.3390/ma15031181
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