Algal phytoremediation represents a practical green solution for treating anaerobically digested piggery effluent(ADPE). The potential and viability of combining microalgae and macroalgae cultivation for the efficient...Algal phytoremediation represents a practical green solution for treating anaerobically digested piggery effluent(ADPE). The potential and viability of combining microalgae and macroalgae cultivation for the efficient treatment of ADPE were evaluated in this study.Bioprospecting the ability of different locally isolated macroalgae species illustrated the potential of Cladophora sp. to successfully grow and treat ADPE with up to 150 mg/L NH_4^+ with a biomass productivity of(0.13 ± 0.02) g/(L·day) and ammonium removal rate of(10.23 ± 0.18) mg/(L·day) NH_4^+. When grown by itself, the microalgae consortium used in this study consisting of Chlorella sp. and Scenedesmus sp. was found to grow and treat undiluted ADPE(up to 525 mg/L NH_4^+) with an average ammonium removal rate of 25 mg/(L·day) NH_4^+ and biomass productivity of(0.012 ± 0.0001) g/(L·day). Nevertheless, when combined together, despite the different cultivation systems(attached and non-attached) evaluated,microalgae and macroalgae were unable to co-exist together and treat ADPE as their respective growth were inversely related to each other due to direct competition for nutrients and available resources as well as the negative physical interaction between both algal groups.展开更多
This study investigates the simultaneous production of hydrochar and bioactive compounds from Ulva lactuca via a hydrothermal process.The experiment was carried out using a batch reaction vessel at different reaction ...This study investigates the simultaneous production of hydrochar and bioactive compounds from Ulva lactuca via a hydrothermal process.The experiment was carried out using a batch reaction vessel at different reaction temperatures of 180-220◦C and various holding times of 30-90 min.As expected,both temperature and time vigorously influenced hydrochar and bioactive compound production.The maximum hydrochar yield was at 32.4 wt%.The higher heating value(HHV)of hydrochar was observed in the range of 17.68-21.07 MJ kg^(-1),near the energy content of low-rank coals.The hydrochars exhibited contact angles higher than 90°(i.e.,94-108°)for a longer time,confirming their hydrophobic surfaces.The scanning electron microscope analysis(SEM)showed that the hydrothermal process enables cracks in the spherical shape of raw U.lactuca into small and porous particles.Besides producing hydrochar,the hydrothermal process of U.lactuca also gives promising antioxidants and phenolics as bioactive compounds.The highest total phenolic content and antioxidant activity could be achieved in hydrolysate at 200℃and 30 min with the value of 1.20±0.12 mg/g and 71.6±1.3%,respectively.展开更多
Aquaculture contributes remarkably to the global economy and food security through seafood production,an important part of the global food supply chain.The success of this industry depends heavily on aquafeeds,and the...Aquaculture contributes remarkably to the global economy and food security through seafood production,an important part of the global food supply chain.The success of this industry depends heavily on aquafeeds,and the nutritional composition of the feed is an important factor for the quality,productivity,and profitability of aquaculture species.The sustainability of the aquaculture industry depends on the accessibility of quality feed ingredients,such as fishmeal and fish oil.These traditional feedstuffs are under increasing significant pressure due to the rapid expansion of aquaculture for human consumption and the decline of natural fish harvest.In this review,we evaluated the development of microalgal molecules in aquaculture and expanded the use of these high-value compounds in the production of aquaculture diets.Microalgae-derived functional ingredients emerged as one of the promising alternatives for aquafeed production with positive health benefits.Several compounds found in microalgae,including carotenoids(lutein,astaxanthin,and𝛽-carotene),essential amino acids(leucine,valine,and threonine),𝛽-1-3-glucan,essential oils(docosahexaenoic acid and eicosapentaenoic acid),minerals,and vitamins,are of high nutritional value to aquaculture.展开更多
基金supported by the Cooperative Research Centre for High Integrity Australian Pork(Pork CRC)through the grant(Pork CRC 4A-109)
文摘Algal phytoremediation represents a practical green solution for treating anaerobically digested piggery effluent(ADPE). The potential and viability of combining microalgae and macroalgae cultivation for the efficient treatment of ADPE were evaluated in this study.Bioprospecting the ability of different locally isolated macroalgae species illustrated the potential of Cladophora sp. to successfully grow and treat ADPE with up to 150 mg/L NH_4^+ with a biomass productivity of(0.13 ± 0.02) g/(L·day) and ammonium removal rate of(10.23 ± 0.18) mg/(L·day) NH_4^+. When grown by itself, the microalgae consortium used in this study consisting of Chlorella sp. and Scenedesmus sp. was found to grow and treat undiluted ADPE(up to 525 mg/L NH_4^+) with an average ammonium removal rate of 25 mg/(L·day) NH_4^+ and biomass productivity of(0.012 ± 0.0001) g/(L·day). Nevertheless, when combined together, despite the different cultivation systems(attached and non-attached) evaluated,microalgae and macroalgae were unable to co-exist together and treat ADPE as their respective growth were inversely related to each other due to direct competition for nutrients and available resources as well as the negative physical interaction between both algal groups.
基金financially by the Indonesian Endowment Fund for Education(LPDP)through“RISPRO KI”the International Research Collaboration(Grant No.RISPRO/KI/B1/KOM/12/11684/1/2020).
文摘This study investigates the simultaneous production of hydrochar and bioactive compounds from Ulva lactuca via a hydrothermal process.The experiment was carried out using a batch reaction vessel at different reaction temperatures of 180-220◦C and various holding times of 30-90 min.As expected,both temperature and time vigorously influenced hydrochar and bioactive compound production.The maximum hydrochar yield was at 32.4 wt%.The higher heating value(HHV)of hydrochar was observed in the range of 17.68-21.07 MJ kg^(-1),near the energy content of low-rank coals.The hydrochars exhibited contact angles higher than 90°(i.e.,94-108°)for a longer time,confirming their hydrophobic surfaces.The scanning electron microscope analysis(SEM)showed that the hydrothermal process enables cracks in the spherical shape of raw U.lactuca into small and porous particles.Besides producing hydrochar,the hydrothermal process of U.lactuca also gives promising antioxidants and phenolics as bioactive compounds.The highest total phenolic content and antioxidant activity could be achieved in hydrolysate at 200℃and 30 min with the value of 1.20±0.12 mg/g and 71.6±1.3%,respectively.
基金supported by the National Institute of Food and Agri-culture(NIFA)/United States Department of Agriculture(USDA)under the Grant number:2018-38821-27752.
文摘Aquaculture contributes remarkably to the global economy and food security through seafood production,an important part of the global food supply chain.The success of this industry depends heavily on aquafeeds,and the nutritional composition of the feed is an important factor for the quality,productivity,and profitability of aquaculture species.The sustainability of the aquaculture industry depends on the accessibility of quality feed ingredients,such as fishmeal and fish oil.These traditional feedstuffs are under increasing significant pressure due to the rapid expansion of aquaculture for human consumption and the decline of natural fish harvest.In this review,we evaluated the development of microalgal molecules in aquaculture and expanded the use of these high-value compounds in the production of aquaculture diets.Microalgae-derived functional ingredients emerged as one of the promising alternatives for aquafeed production with positive health benefits.Several compounds found in microalgae,including carotenoids(lutein,astaxanthin,and𝛽-carotene),essential amino acids(leucine,valine,and threonine),𝛽-1-3-glucan,essential oils(docosahexaenoic acid and eicosapentaenoic acid),minerals,and vitamins,are of high nutritional value to aquaculture.
