The Experts below are selected from a list of 11328 Experts worldwide ranked by ideXlab platform
Jo Shu Chang - One of the best experts on this subject based on the ideXlab platform.
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Waste to energy: the effects of Pseudomonas sp. on Chlorella sorokiniana biomass and lipid productions in palm oil mill effluent
Clean Technologies and Environmental Policy, 2018Co-Authors: Wai Yan Cheah, Jo Shu Chang, Pau Loke Show, Joon Ching Juan, Tau Chuan LingAbstract:Microalgae are recognised as promising feedstock for biofuel production. The feasibility in commercial scale Microalgae Cultivation could be enhanced by incorporating palm oil mill effluent (POME) as culture medium, for greater biomass growth and lipid production, together with POME bioremediation. The polluting POME is generated massively in Malaysia. POME contains high concentrations of carbon and nutrients, thus it is suitable to be applied for Microalgae Cultivation. The approach on waste to energy should be advanced. We studied the effects of applying Pseudomonas sp. on Chlorella sorokiniana CY-1 Cultivation in POME. Pseudomonas sp. was found effective in POME decolourisation prior to C. sorokiniana CY-1 Cultivation. Yet, Microalgae biomass and lipid productions were higher in the non-decolourised POME. Pseudomonas sp. was as well-being co-cultivated with C. sorokiniana CY-1 in ratios of Microalgae versus bacteria of 1:1; 2:1 and 1:2. Biomass of 2.04 g L^−1 and biomass productivity of 185.71 mg L^−1 d^−1 were attained in ratio of 1:1. Interestingly, the lipid content exhibited was excellent (16.04%), and about twofold higher than other ratios and the control (without bacteria). Fatty acids compositions were dominated by C16:0 (32.49%), C18:1 (24.06%) and C18:2 (20.28%), which were desirable fatty acids for biodiesel production. Effective POME bioremediation achieved with chemical oxygen demand, total nitrogen and total phosphorus removal of 53.7, 55.6 and 77.3%, respectively. Co-Cultivation of Microalgae and bacteria can be applied in the POME treatment plant. This allows satisfactory biomass and excellent lipid yields for biofuel production, as well as effective wastewater bioremediation.
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Microalgae Cultivation in palm oil mill effluent pome for lipid production and pollutants removal
Energy Conversion and Management, 2018Co-Authors: Wai Yan Cheah, Jo Shu Chang, Pau Loke Show, Joon Ching Juan, Tau Chuan LingAbstract:Abstract Microalgae Cultivation in wastewaters has been identified as the solution for economical Microalgae Cultivation. This study investigated the feasibility of using POME for Chlorella sp. Cultivation to yield biomass and lipids, as it generates massively in Malaysia which ranked world palm oil exporter. The optimal POME concentration and pretreatment strategy were applied to promote biomass and lipid productivities. Chlorella sorokiniana CY-1 attained maximal of 11.21% of lipid content with 2.12 g L−1 of biomass concentration when Cultivation in acid-heat pretreated 30% (v/v) POME. This provides relatively higher yield than those reported values on POME. Pretreatment was found effective to enhance biomass productions, as it converts lignin in POME into reducing sugars to serve as the supplement. The pollutants removal efficiencies were 62.07% for TN, 47.09% for COD, and 30.77% for TP. This contributes towards greater feasibility in Microalgae Cultivation for biofuel productions and as well towards environmental sustainability.
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effects of water culture medium Cultivation systems and growth modes for Microalgae Cultivation a review
Journal of The Taiwan Institute of Chemical Engineers, 2018Co-Authors: Kit Wayne Chew, Pau Loke Show, Tau Chuan Ling, Shir Reen Chia, Yee Jiun Yap, Jo Shu ChangAbstract:Abstract As the world's natural fuel sources continue to deplete, the search for alternative fuel sources intensifies. A promising fuel source alternative is biofuels from Microalgae, due to it being a renewable source, its wide availability, and also its high production rate. This paper reviews recent developments in Microalgae culture medium, Cultivation systems and growth modes. The importance of identifying the type of medium suitable for Microalgae Cultivation is highlighted along with descriptions and comparison of the medium types that include freshwater, saltwater and wastewater. The different Cultivation systems such as open system, closed system, dark system and offshore Cultivation used for cultivating Microalgae are discussed, along with a study on the impact of large scale Cultivation using these systems. Besides that, various growth modes for Microalgae Cultivation like phototrophic, heterotrophic, mixotrophic, photoheterotophic modes are reviewed.
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waste biorefineries integrating anaerobic digestion and Microalgae Cultivation for bioenergy production
Current Opinion in Biotechnology, 2018Co-Authors: Yi Di Chen, Jo Shu Chang, Dillirani Nagarajan, Nanqi RenAbstract:Commercialization of microalgal Cultivation has been well realized in recent decades with the use of effective strains that can yield the target products, but it is still challenged by the high costs arising from mass production, harvesting, and further processing. Recently, more interest has been directed towards the utilization of waste resources, such as sludge digestate, to enhance the economic feasibility and sustainability of Microalgae production. Anaerobic digestion for waste disposal and phototrophic microalgal Cultivation are well-characterized technologies in both fields. However, integration of anaerobic digestion and microalgal Cultivation to achieve substantial economic and environmental benefits is extremely limited, and thus deserves more attention and research effort. In particular, combining these two makes possible an ideal ‘waste biorefinery’ model, as the C/N/P content in the anaerobic digestate can be used to produce microalgal biomass that serves as feedstock for biofuels, while biogas upgrading can simultaneously be performed by phototrophic CO2 fixation during microalgal growth. This review is thus aimed at elucidating recent advances as well as challenges and future directions with regard to waste biorefineries associated with the integration of anaerobic waste treatment and microalgal Cultivation for bioenergy production.
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Biohydrogen production by a novel integration of dark fermentation and mixotrophic Microalgae Cultivation
International Journal of Hydrogen Energy, 2013Co-Authors: Chien Hung Liu, Chin-yen Chang, Qiang Liao, Xun Zhu, Ching-fu Liao, Jo Shu ChangAbstract:Abstract Biohydrogen is usually produced via dark fermentation, which generates CO2 emissions and produces soluble metabolites (e.g., volatile fatty acids) with high chemical oxygen demand (COD) as the by-products, which require further treatments. In this study, mixotrophic culture of an isolated microalga (Chlorella vulgaris ESP6) was utilized to simultaneously consume CO2 and COD by-products from dark fermentation, converting them to valuable Microalgae biomass. Light intensity and food to microorganism (F/M) ratio were adjusted to 150 μmol m−2 s−1 and F/M ratio, 4.5, respectively, to improve the efficiency of assimilating the soluble metabolites. The mixotrophic Microalgae culture could reduce the CO2 content of dark fermentation effluent from 34% to 5% with nearly 100% consumption of soluble metabolites (mainly butyrate and acetate) in 9 days. The obtained microalgal biomass was hydrolyzed with 1.5% HCl and subsequently used as the substrate for bioH2 production with Clostridium butyricum CGS5, giving a cumulative H2 production of 1276 ml/L, a H2 production rate of 240 ml/L/h, and a H2 yield of 0.94 mol/mol sugar.
Guangce Wang - One of the best experts on this subject based on the ideXlab platform.
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mariculture wastewater treatment with bacterial algal coupling system bacs effect of light intensity on microalgal biomass production and nutrient removal
Environmental Research, 2021Co-Authors: Yedong Gao, Liang Guo, Qianru Liao, Zengshuai Zhang, Yangguo Zhao, Mengchun Gao, Chunji Jin, Zonglian She, Guangce WangAbstract:Abstract Mariculture wastewater generated from the mariculture industry has increased public concern due to its impact on the sustainability of aquatic environments and aquaculture practices. Herein, the Bacterial-Algal Coupling System was applied for mariculture wastewater treatment. Microalgae growth in heterotrophy and mixotrophy (2000–8000 lux) was first compared. The best microalgal growth and nutrient removal were obtained at 5000 lux, where biomass productivity of Microalgae was 0.465 g L−1 d−1, and 98.1% of chemical oxygen demand, 70.7% of ammonia-nitrogen, and 90.0% of total phosphorus were removed. To further understand the nutrient removal through Microalgae Cultivation, the enzyme activities involved in the Calvin cycle and the Tricarboxylic Acid cycle at different light intensities were determined. Under mixotrophic Cultivation, there was a coordination between photosynthesis and heterotrophic metabolism in the agal cell, which resulted in a high algal biomass production and removal efficiency of nutrients. This study provided a novel insight into the bioremediation of mariculture wastewater and Microalgae Cultivation.
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integrating acidogenic fermentation and Microalgae Cultivation of bacterial algal coupling system for mariculture wastewater treatment
Bioresource Technology, 2021Co-Authors: Xuting You, Liang Guo, Qianru Liao, Zengshuai Zhang, Yangguo Zhao, Mengchun Gao, Chunji Jin, Zonglian She, Yi Wang, Guangce WangAbstract:Abstract In this study, Bacterial-Algal Coupling System, a method integrated acidogenic fermentation (AF) and Microalgae Cultivation, was applied to the mariculture wastewater (MW) treatment. The MW was acidogenic fermented at different initial pH (4.0–10.0), and different dilution rate (5%-20%) of AF effluent was used for Chlorella vulgaris Cultivation. The results showed that the maximum biomass production (5.6 g/L) of Microalgae was obtained with 10% AF effluent. Ammonium, phosphate and volatile fatty acids could be metabolized by Microalgae. More specifically, acetic acid and propionic acid were utilized prior to butyric acid and valeric acid. To better understand the synergy of heterotrophic metabolism and photosynthesis, the activities of Rubisco and citrate synthase were revealed to provide additional insight for nutrients recovery from MW by mixotrophic Cultivation of Microalgae.
Tau Chuan Ling - One of the best experts on this subject based on the ideXlab platform.
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Waste to energy: the effects of Pseudomonas sp. on Chlorella sorokiniana biomass and lipid productions in palm oil mill effluent
Clean Technologies and Environmental Policy, 2018Co-Authors: Wai Yan Cheah, Jo Shu Chang, Pau Loke Show, Joon Ching Juan, Tau Chuan LingAbstract:Microalgae are recognised as promising feedstock for biofuel production. The feasibility in commercial scale Microalgae Cultivation could be enhanced by incorporating palm oil mill effluent (POME) as culture medium, for greater biomass growth and lipid production, together with POME bioremediation. The polluting POME is generated massively in Malaysia. POME contains high concentrations of carbon and nutrients, thus it is suitable to be applied for Microalgae Cultivation. The approach on waste to energy should be advanced. We studied the effects of applying Pseudomonas sp. on Chlorella sorokiniana CY-1 Cultivation in POME. Pseudomonas sp. was found effective in POME decolourisation prior to C. sorokiniana CY-1 Cultivation. Yet, Microalgae biomass and lipid productions were higher in the non-decolourised POME. Pseudomonas sp. was as well-being co-cultivated with C. sorokiniana CY-1 in ratios of Microalgae versus bacteria of 1:1; 2:1 and 1:2. Biomass of 2.04 g L^−1 and biomass productivity of 185.71 mg L^−1 d^−1 were attained in ratio of 1:1. Interestingly, the lipid content exhibited was excellent (16.04%), and about twofold higher than other ratios and the control (without bacteria). Fatty acids compositions were dominated by C16:0 (32.49%), C18:1 (24.06%) and C18:2 (20.28%), which were desirable fatty acids for biodiesel production. Effective POME bioremediation achieved with chemical oxygen demand, total nitrogen and total phosphorus removal of 53.7, 55.6 and 77.3%, respectively. Co-Cultivation of Microalgae and bacteria can be applied in the POME treatment plant. This allows satisfactory biomass and excellent lipid yields for biofuel production, as well as effective wastewater bioremediation.
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Microalgae Cultivation in palm oil mill effluent pome for lipid production and pollutants removal
Energy Conversion and Management, 2018Co-Authors: Wai Yan Cheah, Jo Shu Chang, Pau Loke Show, Joon Ching Juan, Tau Chuan LingAbstract:Abstract Microalgae Cultivation in wastewaters has been identified as the solution for economical Microalgae Cultivation. This study investigated the feasibility of using POME for Chlorella sp. Cultivation to yield biomass and lipids, as it generates massively in Malaysia which ranked world palm oil exporter. The optimal POME concentration and pretreatment strategy were applied to promote biomass and lipid productivities. Chlorella sorokiniana CY-1 attained maximal of 11.21% of lipid content with 2.12 g L−1 of biomass concentration when Cultivation in acid-heat pretreated 30% (v/v) POME. This provides relatively higher yield than those reported values on POME. Pretreatment was found effective to enhance biomass productions, as it converts lignin in POME into reducing sugars to serve as the supplement. The pollutants removal efficiencies were 62.07% for TN, 47.09% for COD, and 30.77% for TP. This contributes towards greater feasibility in Microalgae Cultivation for biofuel productions and as well towards environmental sustainability.
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effects of water culture medium Cultivation systems and growth modes for Microalgae Cultivation a review
Journal of The Taiwan Institute of Chemical Engineers, 2018Co-Authors: Kit Wayne Chew, Pau Loke Show, Tau Chuan Ling, Shir Reen Chia, Yee Jiun Yap, Jo Shu ChangAbstract:Abstract As the world's natural fuel sources continue to deplete, the search for alternative fuel sources intensifies. A promising fuel source alternative is biofuels from Microalgae, due to it being a renewable source, its wide availability, and also its high production rate. This paper reviews recent developments in Microalgae culture medium, Cultivation systems and growth modes. The importance of identifying the type of medium suitable for Microalgae Cultivation is highlighted along with descriptions and comparison of the medium types that include freshwater, saltwater and wastewater. The different Cultivation systems such as open system, closed system, dark system and offshore Cultivation used for cultivating Microalgae are discussed, along with a study on the impact of large scale Cultivation using these systems. Besides that, various growth modes for Microalgae Cultivation like phototrophic, heterotrophic, mixotrophic, photoheterotophic modes are reviewed.
Huu Hao Ngo - One of the best experts on this subject based on the ideXlab platform.
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non suspended Microalgae Cultivation for wastewater refinery and biomass production
Bioresource Technology, 2020Co-Authors: Linlan Zhuang, Huu Hao NgoAbstract:Abstract Non-suspended Microalgae Cultivation technology coupled with wastewater purification has received more scientific attention in recent decades. Since the non-suspended Microalgae Cultivation is quite different from the suspended ones, the following issues are compared in this study such as advantages and disadvantages, pollutant removal mechanisms and regulations, influential factors, and Microalgae biomass accumulation. The analysis aims to support the further application of this technology. The median removal rates of COD, TN, TP, NH4+-N and NO3−-N were 91.6%, 78.2%, 87.5%, 93.2% and 81.7%, respectively, by non-suspended Microalgae under the TN & TP load rates up to 150 mg·L−1·d−1. The main pathway for TN & TP removal is Microalgae cell absorbance. Light intensity, pollutant composition and Microalgae metabolic types are the major factors that influence pollutant removal and the lipid content of Microalgae. Meanwhile the mechanism concerning how macro-outer conditions influence the micro-environment and further growth of non-suspended Microalgae requires more investigation.
J Ferrer - One of the best experts on this subject based on the ideXlab platform.
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water resource recovery by means of Microalgae Cultivation in outdoor photobioreactors using the effluent from an anaerobic membrane bioreactor fed with pre treated sewage
Bioresource Technology, 2016Co-Authors: Alexandre Viruela, Monica Murgui, Tao Gomezgil, F Duran, A Robles, M V Ruano, J Ferrer, A SecoAbstract:Abstract With the aim of assessing the potential of Microalgae Cultivation for water resource recovery (WRR), the performance of three 0.55 m 3 flat-plate photobioreactors (PBRs) was evaluated in terms of nutrient removal rate (NRR) and biomass production. The PBRs were operated outdoor (at ambient temperature and light intensity) using as growth media the nutrient-rich effluent from an AnMBR fed with pre-treated sewage. Solar irradiance was the most determining factor affecting NRR. Biomass productivity was significantly affected by temperatures below 20 °C. The maximum biomass productivity (52.3 mg VSS·L −1 ·d −1 ) and NRR (5.84 mg NH 4 -N·L −1 ·d −1 and 0.85 mg PO 4 -P·L −1 ·d −1 ) were achieved at solar irradiance of 395 μE·m −2 ·s −1 , temperature of 25.5 °C, and HRT of 8 days. Under these conditions, it was possible to comply with effluent nutrient standards (European Directive 91/271/CEE) when the nutrient content in the influent was in the range of 40–50 mg N·L −1 and 6–7 mg P·L −1 .
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Microalgae Cultivation in wastewater nutrient removal from anaerobic membrane bioreactor effluent
Bioresource Technology, 2012Co-Authors: A Ruizmartinez, A Seco, Martin N Garcia, I Romero, J FerrerAbstract:Abstract This study investigated the removal of nitrogen and phosphorus from the effluent of a submerged anaerobic membrane bioreactor (SAnMBR) by means of a lab-scale photobioreactor in which algae biomass was cultured in a semi-continuous mode for a period of 42 days. Solids retention time was 2 days and a stable pH value in the system was maintained by adding CO 2 . Nitrogen and phosphorus concentrations in the SAnMBR effluent fluctuated according to the operating performance of the bioreactor and the properties of its actual wastewater load. Despite these variations, the anaerobic effluent proved to be a suitable growth medium for Microalgae (mean biomass productivity was 234 mg l −1 d −1 ), achieving a nutrient removal efficiency of 67.2% for ammonium (NH 4 + –N) and 97.8% for phosphate (PO 4 −3 –P). When conditions were optimum, excellent water quality with very low ammonium and phosphate concentrations was obtained.