The Experts below are selected from a list of 11946 Experts worldwide ranked by ideXlab platform
Roger Ruan - One of the best experts on this subject based on the ideXlab platform.
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Magnetic field intervention on growth of the filamentous microalgae Tribonema sp. in starch wastewater for Algal Biomass Production and nutrients removal: Influence of ambient temperature and operational strategy
Bioresource technology, 2020Co-Authors: Shuhao Huo, Yanling Cheng, Kirk Cobb, Feifei Zhu, Xiu Chen, Wanqin Zhang, Dongjie Chen, Nana Jin, Lu Wang, Roger RuanAbstract:Abstract This paper investigated the effects of temperature and cultivation methods (batch or semi-continuous culture) on the filamentous microalgae Tribonema sp. Biomass Production and nutrients removal in starch wastewater under low intensity magnetic field (MF) intervention. The MF significantly promoted Algal growth in the late logarithmic-phase of batch cultivation, and the effect was even more obvious at lower temperatures. The MF treated group at 30 °C accumulated the highest Biomass of 4.44 g/L of batch culture, an increase of 15.0% compared with the control group. The oil content of Tribonema sp. was enhanced with the MF intervention, especially for the batch culture. In the semi-continuous culture under MF intervention, Tribonema sp. reached the high Biomass of 18.45 g/L after 25 days. When gradually reducing hydraulic retention time (HRT) to 1 day, the average removal rates for COD, TN, NH3-N and TP were all more than 90% in the semi-continuous cultivation.
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balancing carbon nitrogen ratio to improve nutrients removal and Algal Biomass Production in piggery and brewery wastewaters
Bioresource Technology, 2018Co-Authors: Hongli Zheng, Xiaodan Wu, Min Addy, Qian Lu, Yanling Cheng, Roger RuanAbstract:Abstract To improve nutrients removal from wastewaters and enhance Algal Biomass Production, piggery wastewater was mixed with brewery wastewaters. The results showed that it was a promising way to cultivate microalga in piggery and brewery wastewaters by balancing the carbon/nitrogen ratio. The optimal treatment condition for the mixed piggery-brewery wastewater using microalga was piggery wastewater mixed with brewery packaging wastewater by 1:5 at pH 7.0, resulting in carbon/nitrogen ratio of 7.9, with the Biomass concentration of 2.85 g L −1 , and the removal of 100% ammonia, 96% of total nitrogen, 90% of total phosphorus, and 93% of chemical oxygen demand. The application of the established strategies can enhance nutrient removal efficiency of the wastewaters while reducing microAlgal Biomass Production costs.
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development of an effective acidogenically digested swine manure based Algal system for improved wastewater treatment and biofuel and feed Production
Applied Energy, 2013Co-Authors: Wenguang Zhou, Roger Ruan, Min Min, Paul Chen, Yuhuan Liu, Hanwu Lei, Jian ShiAbstract:An effective semi-continuous process was developed to grow a locally isolated green microalga Chlorella sp. on acidogenically digested swine wastewater in bench scale for improved Algal Biomass Production and waste nutrient removal using central composite design (CCD). The influences of two key parameters, namely wastewater dilution rate (DR) and hydraulic retention time (HRT), on Algal Biomass productivity and nutrient removal rates were investigated. The optimal parameters estimated from the significant second-order quadratic models (p < 0.05) were 8-fold DR and 2.26-d HRT. The cultivating experiment in a bench-scale multi-layer photobioreactor with the optimized conditions achieved stable Algal productivity and nutrient removal rates, which fitted the predictive models well. Moreover, relatively high and stable protein and lipid contents (58.78% and 26.09% of the dry weight, respectively) were observed for the collected algae sample, indicating the suitability of the Algal Biomass as ideal feedstock for both biofuel and feed Production.
Wenrong Hu - One of the best experts on this subject based on the ideXlab platform.
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Biomass Production and nutrient assimilation by a novel microalga monoraphidium spp sdec 17 cultivated in a high ammonia wastewater
Energy Conversion and Management, 2016Co-Authors: Liqun Jiang, Wenrong HuAbstract:Abstract To obtain suitable microalgae species for successful Algal Biomass Production from low-cost wastewater, four axenic algae strains were isolated from a local lake. Through acclimation with the high-ammonia complex wastewater (CW) of a gourmet powder factory, one algae species showed good ability to yield Biomass and endure high-ammonia conditions (>170 mg L −1 ) in CW. This was verified as a Monoraphidium spp. by molecular identification, and named as SDEC-17. The algae were 27–60 μm in length and 4–10 μm in width, with relatively low specific surface area for withstanding ammonia ingress through the cell membrane. The final Biomass densities of SDEC-17 in CW (1.29 ± 0.09 g L −1 ) and BG11 medium (1.31 ± 0.08 g L −1 ) did not show a statistically significant difference (p > 0.05). Moreover, protein content was stimulated to 44% by CW, compared to 35% in BG11. Lipid accumulation of SDEC-17 was not significantly influenced by CW, and fatty acid profiles resembled those of palm oil. The algae would utilize ammonia first under conditions with various nitrogen sources present, and absorb large amounts of phosphorus from the wastewater. Thus, phosphorus and ammonia were removed with efficiencies of nearly 100%, satisfying the discharge standard of pollutants for municipal wastewater treatment plants. These results suggested that Monoraphidium spp. SDEC-17 is a promising candidate for algae Biomass Production and possibly chemical energy recovery from the complex wastewater.
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Biomass Production and nutrient assimilation by a novel microalga monoraphidium spp sdec 17 cultivated in a high ammonia wastewater
Energy Conversion and Management, 2016Co-Authors: Liqun Jiang, Wenrong HuAbstract:Abstract To obtain suitable microalgae species for successful Algal Biomass Production from low-cost wastewater, four axenic algae strains were isolated from a local lake. Through acclimation with the high-ammonia complex wastewater (CW) of a gourmet powder factory, one algae species showed good ability to yield Biomass and endure high-ammonia conditions (>170 mg L −1 ) in CW. This was verified as a Monoraphidium spp. by molecular identification, and named as SDEC-17. The algae were 27–60 μm in length and 4–10 μm in width, with relatively low specific surface area for withstanding ammonia ingress through the cell membrane. The final Biomass densities of SDEC-17 in CW (1.29 ± 0.09 g L −1 ) and BG11 medium (1.31 ± 0.08 g L −1 ) did not show a statistically significant difference (p > 0.05). Moreover, protein content was stimulated to 44% by CW, compared to 35% in BG11. Lipid accumulation of SDEC-17 was not significantly influenced by CW, and fatty acid profiles resembled those of palm oil. The algae would utilize ammonia first under conditions with various nitrogen sources present, and absorb large amounts of phosphorus from the wastewater. Thus, phosphorus and ammonia were removed with efficiencies of nearly 100%, satisfying the discharge standard of pollutants for municipal wastewater treatment plants. These results suggested that Monoraphidium spp. SDEC-17 is a promising candidate for algae Biomass Production and possibly chemical energy recovery from the complex wastewater.
Liqun Jiang - One of the best experts on this subject based on the ideXlab platform.
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Biomass Production and nutrient assimilation by a novel microalga monoraphidium spp sdec 17 cultivated in a high ammonia wastewater
Energy Conversion and Management, 2016Co-Authors: Liqun Jiang, Wenrong HuAbstract:Abstract To obtain suitable microalgae species for successful Algal Biomass Production from low-cost wastewater, four axenic algae strains were isolated from a local lake. Through acclimation with the high-ammonia complex wastewater (CW) of a gourmet powder factory, one algae species showed good ability to yield Biomass and endure high-ammonia conditions (>170 mg L −1 ) in CW. This was verified as a Monoraphidium spp. by molecular identification, and named as SDEC-17. The algae were 27–60 μm in length and 4–10 μm in width, with relatively low specific surface area for withstanding ammonia ingress through the cell membrane. The final Biomass densities of SDEC-17 in CW (1.29 ± 0.09 g L −1 ) and BG11 medium (1.31 ± 0.08 g L −1 ) did not show a statistically significant difference (p > 0.05). Moreover, protein content was stimulated to 44% by CW, compared to 35% in BG11. Lipid accumulation of SDEC-17 was not significantly influenced by CW, and fatty acid profiles resembled those of palm oil. The algae would utilize ammonia first under conditions with various nitrogen sources present, and absorb large amounts of phosphorus from the wastewater. Thus, phosphorus and ammonia were removed with efficiencies of nearly 100%, satisfying the discharge standard of pollutants for municipal wastewater treatment plants. These results suggested that Monoraphidium spp. SDEC-17 is a promising candidate for algae Biomass Production and possibly chemical energy recovery from the complex wastewater.
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Biomass Production and nutrient assimilation by a novel microalga monoraphidium spp sdec 17 cultivated in a high ammonia wastewater
Energy Conversion and Management, 2016Co-Authors: Liqun Jiang, Wenrong HuAbstract:Abstract To obtain suitable microalgae species for successful Algal Biomass Production from low-cost wastewater, four axenic algae strains were isolated from a local lake. Through acclimation with the high-ammonia complex wastewater (CW) of a gourmet powder factory, one algae species showed good ability to yield Biomass and endure high-ammonia conditions (>170 mg L −1 ) in CW. This was verified as a Monoraphidium spp. by molecular identification, and named as SDEC-17. The algae were 27–60 μm in length and 4–10 μm in width, with relatively low specific surface area for withstanding ammonia ingress through the cell membrane. The final Biomass densities of SDEC-17 in CW (1.29 ± 0.09 g L −1 ) and BG11 medium (1.31 ± 0.08 g L −1 ) did not show a statistically significant difference (p > 0.05). Moreover, protein content was stimulated to 44% by CW, compared to 35% in BG11. Lipid accumulation of SDEC-17 was not significantly influenced by CW, and fatty acid profiles resembled those of palm oil. The algae would utilize ammonia first under conditions with various nitrogen sources present, and absorb large amounts of phosphorus from the wastewater. Thus, phosphorus and ammonia were removed with efficiencies of nearly 100%, satisfying the discharge standard of pollutants for municipal wastewater treatment plants. These results suggested that Monoraphidium spp. SDEC-17 is a promising candidate for algae Biomass Production and possibly chemical energy recovery from the complex wastewater.
Nanqi Ren - One of the best experts on this subject based on the ideXlab platform.
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a new lipid rich microalga scenedesmus sp strain r 16 isolated using nile red staining effects of carbon and nitrogen sources and initial ph on the Biomass and lipid Production
Biotechnology for Biofuels, 2013Co-Authors: Hong Yu Ren, Bingfeng Liu, Lei Zhao, Nanqi RenAbstract:Background Biodiesel Production from oleaginous microalgae shows great potential as a promising alternative to conventional fossil fuels. Currently, most research focus on Algal Biomass Production with autotrophic cultivation, but this cultivation strategy induces low Biomass concentration and it is difficult to be used in large-scale Algal Biomass Production. By contrast, heterotrophic algae allows higher growth rate and can accumulate higher lipid. However, the fast-growing and lipid-rich microalgae that can be cultivated in heterotrophic system for the industrial application of biodiesel Production are still few. Traditional solvent extraction and gravimetric determination to detect the microAlgal total lipid content is time-consuming and laborious, which has become a major limiting factor for selecting large number of algae specimens. Thus, it is critical to develop a rapid and efficient procedure for the screening of lipid-rich microalgae.
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a new lipid rich microalga scenedesmus sp strain r 16 isolated using nile red staining effects of carbon and nitrogen sources and initial ph on the Biomass and lipid Production
Biotechnology for Biofuels, 2013Co-Authors: Hong Yu Ren, Bingfeng Liu, Lei Zhao, Nanqi RenAbstract:Biodiesel Production from oleaginous microalgae shows great potential as a promising alternative to conventional fossil fuels. Currently, most research focus on Algal Biomass Production with autotrophic cultivation, but this cultivation strategy induces low Biomass concentration and it is difficult to be used in large-scale Algal Biomass Production. By contrast, heterotrophic algae allows higher growth rate and can accumulate higher lipid. However, the fast-growing and lipid-rich microalgae that can be cultivated in heterotrophic system for the industrial application of biodiesel Production are still few. Traditional solvent extraction and gravimetric determination to detect the microAlgal total lipid content is time-consuming and laborious, which has become a major limiting factor for selecting large number of algae specimens. Thus, it is critical to develop a rapid and efficient procedure for the screening of lipid-rich microalgae. A novel green microalga Scenedesmus sp. strain R-16 with high total lipid content was selected using the Nile red staining from eighty-eight isolates. Various carbon sources (fructose, glucose and acetate) and nitrogen sources (nitrate, urea, peptone and yeast extract) can be utilized for microAlgal growth and lipid Production, and the optimal carbon and nitrogen sources were glucose (10 g L-1) and nitrate (0.6 g L-1), respectively. Compared to autotrophic situation, the strain R-16 can grow well heterotrophically without light and the accumulated total lipid content and Biomass reached 43.4% and 3.46 g L-1, respectively. In addition, nitrogen deficiency led to an accumulation of lipid and the total lipid content was as high as 52.6%, and it was worth noting that strain R-16 exhibited strong tolerance to high glucose (up to 100 g L-1) and a wide range of pH (4.0-11.0). The newly developed ultrasonic-assisted Nile red method proved to be an efficient isolation procedure and was successfully used in the selection of oleaginous microalgae. The isolated novel green microAlgal strain R-16 was rich in lipid and can live in varied and contrasting conditions. The algae appeared to have great potential for application in microalgae-based biodiesel Production.
Jo Shu Chang - One of the best experts on this subject based on the ideXlab platform.
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cultivating chlorella sorokiniana ak 1 with swine wastewater for simultaneous wastewater treatment and Algal Biomass Production
Bioresource Technology, 2020Co-Authors: Chunyen Chen, En Wei Kuo, Dillirani Nagarajan, Chengdi Dong, Duujong Lee, Jo Shu ChangAbstract:Swine wastewater is rich in nitrogen and organic carbon which are essential macronutrients for microAlgal growth. Three indigenous microAlgal strains (Chlorella sorokiniana AK-1, Chlorella sorokiniana MS-C1, and Chlorella sorokiniana TJ5) were examined for their growth capability in untreated swine wastewater. C. sorokiniana AK-1 showed the best tolerance towards swine wastewater, and obtained the highest Biomass concentration (5.45 g/L) and protein productivity (0.27 g/L/d) when grown in 50% strength swine wastewater. Cell immobilization using sponge as the solid carrier further enhanced maximal Biomass concentration and protein productivity to 8.08 g/L and 0.272 g/L/d, respectively. Reuse of microalgae loaded sponge resulted in an average Biomass Production and protein productivity of 6.51 g/L and 0.15 g/L/d, respectively. The COD, TN and TP removal efficiency for the swine wastewater was 90.1, 97.0 and 92.8%, respectively. This innovative swine wastewater treatment method has demonstrated excellent performance on simultaneous swine wastewater treatment and protein-rich microAlgal Biomass Production.