Article
Engineering, Chemical
Hao-Cheng Yu, Chyi-How Lay, Peer Mohamed Abdul, Jane-Yii Wu
Summary: This study optimized the cultivation conditions for a local microalgae species, Chlorella sp. G3H3-1-2, with high pH-resistant, high growth rate, and high lipid content. It was found that a pH range of 6.0 to 8.0 with glucose as the carbon source resulted in the highest specific growth rate of 1.22 day(-1) for Chlorella sp. G3H3-1-2. However, the highest total FAMEs content of 59% in the biomass of 1.75 g/L was obtained when using the combination of glucose and (NH4)2SO4 at a high pH value of 10.
Article
Energy & Fuels
Najmeh Hamidian, Hajar Zamani
Summary: The study investigated the cultivation of freshwater microalgae Chlorella sorokiniana EAKI in untreated dairy wastewater as a low-cost nutrient source for biofuel production. Undiluted wastewater was found to result in the highest microalgae biomass production and lipid accumulation, making it a cost-effective option for sustainable biofuel generation. The biodiesel produced from wastewater-grown C. sorokiniana showed promising physico-chemical characteristics, confirming its potential for high-quality biodiesel production.
BIOENERGY RESEARCH
(2022)
Article
Engineering, Environmental
Laure Wetterwald, Antoine Leybros, Gatien Fleury, Florian Delrue, Alexandra Dimitriades-Lemaire, Paul Chambonniere, Audrey Hertz
Summary: This study investigates the effects of water content, operating pressure and temperature on supercritical CO2 extraction of lipids from Chlorella vulgaris microalgae. The highest extraction yield was obtained with freeze-dried microalgae at 40℃ and 200 bar. However, extracts obtained at 40℃ and 250 bar had the highest fatty acid content, while those obtained at 60℃ and 250 bar had the highest cetane number and oxidative stability. Water in the initial biomass had a negative impact on total extraction yield, but promoted the extraction of fatty acids, particularly monounsaturated ones.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Energy & Fuels
Veerasekar Nambukrishnan, Jayanthi Singaram
Summary: This study investigated the lipid-producing ability of marine microalgae cultured in secondary effluent from tannery wastewater treatment plants. Chlorella marina showed the highest biomass and lipid yield, and the biodiesel obtained from it also met the standards. This study indicates that tannery effluent can be a suitable feedstock for marine microalgae in biofuel production.
Article
Agricultural Engineering
Xueting Song, Bing-Feng Liu, Fanying Kong, Qingqing Song, Nan-Qi Ren, Hong-Yu Ren
Summary: This study investigated the cell growth, lipid production, and Cr6+ removal of Parachlorella kessleri R-3 at pH 3.5 and 15 degrees C. It was found that low concentration of Cr6+ promoted algal growth, while high concentrations inhibited growth. The highest biomass concentration (2.40 g/L) and lipid productivity (131.79 mg/L d-1) were achieved at 2 mg/L Cr6+, while the highest lipid content (61.03%) was achieved at 5 mg/L Cr6+. The maximum Cr6+ removal efficiency of 91% was obtained at 0.5 mg/L Cr6+. Fatty acid composition analysis showed a high content of C16-18 in strain R-3 (74.88-89.21%). This study provides new insights into the treatment of heavy metals and lipid production in cold regions.
BIORESOURCE TECHNOLOGY
(2023)
Article
Engineering, Environmental
Chaofan Zhang, Shih-Hsin Ho, Anran Li, Liang Fu, Dandan Zhou
Summary: The study suggests that a microalgal co-culture strategy can resist competition stress from bacteria and improve lipid production. The growth inhibition in the co-culture system was significantly reduced, and lipid production was 20-79% higher than that in monocultures.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Agricultural Engineering
Vaibhav Sunil Tambat, Anil Kumar Patel, Reeta Rani Singhania, Akash Pralhad Vadrale, Archana Tiwari, Chiu-Wen Chen, Cheng-Di Dong
Summary: This study focused on designing and optimizing a two-stage mixotrophic bioprocess using Chlorella zofingiensis to produce astaxanthin. Gradual increase in light intensity and micronutrient concentration during the first stage and stress conditions during the second stage were found to enhance biomass and astaxanthin yield. The study also showed the potential of using Chlorella zofingiensis for commercial production of astaxanthin and lipid, with promising sustainability features.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Dan Hu, Jiaxing Zhang, Ruoyu Chu, Zhihong Yin, Jiangjun Hu, Yohanes Kristianto Nugroho, Zhaohua Li, Liandong Zhu
Summary: The study found that landfill leachate with a 10% dilution rate was optimal for microalgae growth, showing higher biomass growth and nutrient removal efficiency. In this condition, co-culture microalgae demonstrated improved cell activity and nutrient utilization efficiency.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Masoumeh Panbehkar Bisheh, Hasan Amini Rad
Summary: The physicochemical properties of MgAC-NPs make them beneficial in treating microalgae and have the potential for nutrient removal in wastewater treatment plants. The optimized conditions for cultivating Chlorella sorokiniana PA.91 with MgAC-NPs were found to be 20 degrees C, 37 μmol m(-2) s(-1), and 0.05 g L-1, resulting in the best growth productivity and biomass performance.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Yequan Sheng, Thangavel Mathimani, Kathirvel Brindhadevi, Sakeenabi Basha, Ashraf Elfasakhany, Changlei Xia, Arivalagan Pugazhendhi
Summary: The study investigated the effects of different CO2 concentrations on the growth, lipid content, and fatty acid composition of Chlorella vulgaris. Results showed that higher CO2 levels led to increased biomass yield and lipid content, with 15% CO2 supply resulting in the highest biomass yield and lipid content.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Huiwen Yang, Zhenhao Zhao, Yang Liu, Liang Fu, Dandan Zhou
Summary: This study found that phytohormones can promote the growth and bioresource recovery of microalgae in antibiotic wastewater treatment, providing a new clue for the utilization of microalgae to recover high-value bioresources from antibiotic wastewater.
RESOURCES CONSERVATION AND RECYCLING
(2023)
Article
Energy & Fuels
Joana Oliveira, Emanuel Costa, Joana Maia Dias, Jose C. Pires
Summary: This study evaluates the feasibility of using microalgae as oil feedstock for biodiesel production. The results show that oil extracted at room temperature has a higher biodiesel conversion yield compared to high-temperature extraction. The potential of using Chlorella vulgaris for biodiesel production is low, but enzymatic biodiesel production from microalgae represents a promising avenue for sustainable energy generation.
BIOENERGY RESEARCH
(2023)
Article
Environmental Sciences
Suiyi Li, V. Meenakshi, S. Nithya, Sulaiman Ali Alharbi, Saleh H. Salmen, Rajasree Shanmuganathan, Li Zhang, Changlei Xia
Summary: The effect of wastewater and NaCl mixture on microalgae growth was studied and it was found that increasing salinity in wastewater led to decreased biomass production but significantly increased lipid content. The addition of Fe2O3 nanoparticles enhanced microalgae productivity. Chlorella vulgaris was identified as a suitable candidate for treating high salinity wastewater.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Rajasree Shanmuganathan, Quynh Hoang Le, Abeer S. Aloufi, Beata Gavurov, J. R. Deepak, Endalkachew Mosisa, T. R. Praveenkumar
Summary: This study investigates the challenges of microalgae biofuel production, such as low lipid content and difficulties with algal cell harvesting. The research examines the impact of seawater content and nanoparticle concentration on freshwater microalgae growth and biofuel production. The findings suggest that increasing the proportion of seawater and nanoparticles can enhance lipid content and cell diameter, while excessive nanoparticle concentrations and low seawater content hinder microalgae growth. Furthermore, optimal results were achieved at a nanoparticle concentration of 150 mg/L.
ENVIRONMENTAL RESEARCH
(2023)
Article
Biotechnology & Applied Microbiology
Qian Lu, Chunyang Ma, Lei Guo, Yujie Lu, Huankai Li
Summary: Simultaneous inoculation of microalgae and yeast is the optimal strategy for utilizing starch processing effluent for biofuel feedstock production. Under the optimal conditions, the lipid yield and carbon-conversion ratio of the co-fermentation reached 1.81 g/L and 82.53%, respectively, which were higher than those of the monoculture model. Co-fermentation of microalgae and yeast in starch processing effluent is a promising and applicable strategy for wastewater remediation and low-cost biofuel feedstock production.
FERMENTATION-BASEL
(2023)
Article
Biotechnology & Applied Microbiology
Sung-Yeoul Kim, Vikash Chandra Roy, Jin-Seok Park, Byung-Soo Chun
Summary: This study aims to extract functional substances from Undaria pinnatiida sporophyll using supercritical carbon dioxide (SC-CO2) and subcritical water extraction (SWE). The results showed that the consecutive green extraction method can yield extracts rich in fucoxanthin and beta-carotene, and the sporophyll of Undaria pinnatiida contains health-beneficial fatty acids. Additionally, SWE can extract substances with antioxidant, antibacterial, and antihypertensive activities.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2024)