Article
Environmental Sciences
Ahmed M. Sadeq, Zainab Z. Ismail
Summary: This study evaluated a sustainable approach for simultaneous desalination of seawater, bioelectrochemical treatment of sewage, and power generation using a tubular photosynthesis desalination microbial fuel cell (PDMC) continuously operated for 180 days. The results showed that the maximum desalination efficiency was 80%, with an average of 72%, and the maximum removal efficiency of sewage organic content was 99.3%, with an average of 91%. The maximum power output was 430.7 mW/m3. No fouling was observed on the membranes throughout the operation. The study demonstrated the potential of this approach for sustainable water supply, sewage treatment, and power generation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Review
Biochemical Research Methods
Etiele Greque de Morais, Igor Carvalho Fontes Sampaio, Eva Gonzalez-Flo, Ivet Ferrer, Enrica Uggetti, Joan Garcia
Summary: Microalgae-based wastewater treatment is a method to obtain reclaimed water and produce bio-based products and biofuels. However, the harvesting of microalgal biomass is a challenging and expensive process, which hinders its full-scale implementation. An integrated approach that includes engineering, green chemistry, and microbial anabolism is necessary to address the challenges of microalgal biomass harvesting.
Article
Environmental Sciences
Han Shao, Yahui Sun, Xiaoxiang Jiang, Jun Hu, Chenglong Guo, Chenjia Lu, Feihong Guo, Chihe Sun, Yunjun Wang, Chuanchao Dai
Summary: Integrating a dialysis bag into a column photobioreactor improves microalgae growth and nutrient removal efficiency without the need for energy-intensive pretreatments. This method also provides a greener solution for purifying other types of wastewater.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Etiele G. De Morais, Ana M. Murillo, Piet N. L. Lens, Ivet Ferrer, Enrica Uggetti
Summary: Selenium is an important element for many living organisms, but high concentrations can harm the environment. This study found that Chlorella vulgaris and Scenedesmus sp. grown in urban wastewater with different selenium concentrations can effectively remove selenium.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Polymer Science
Gabriela Garcia, Juan Eduardo Sosa-Hernandez, Laura Isabel Rodas-Zuluaga, Carlos Castillo-Zacarias, Hafiz Iqbal, Roberto Parra-Saldivar
Summary: Traditional plastics, derived from petroleum and non-biodegradable, contribute to fossil resources depletion and environmental degradation. Polyhydroxyalkanoates, as a promising alternative, accumulate in various microorganisms and are suitable for a wide variety of applications. The study explored the production of polyhydroxyalkanoate by a freshwater microalgae strain and identified significant factors influencing the production, suggesting it as a promising species for producing bio-resources in commercial systems.
Article
Engineering, Environmental
N. N. Safie, A. Y. Zahrim
Summary: The review summarizes the physical properties, performance in nutrient removal and recovery of natural adsorbents and hybrid absorbents used for nutrient recovery. The recovery rate can be as high as 96%.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Environmental Sciences
Lingchong Feng, Zhenyi Wang, Dongwei Jia, Xiangbo Zou, Mumin Rao, Zhimin Huang, Cao Kuang, Ji Ye, Chuangting Chen, Cong Huang, Maoqiang Zhang, Jun Cheng
Summary: This study aimed to determine the optimal CO2 concentration for microalgal biomass production with industrial flue gas. By analyzing the metabolism pathways of Nannochloropsis oceanica (N. oceanica) under different nitrogen/phosphorus (N/P) nutrients and CO2 concentrations, the researchers found that the optimum CO2 concentration was 70% under 100% N/P nutrients, and 50% for N or P deficiency and 30% for both N and P deficiency. The optimal combination of CO2 concentration and N/P nutrients enhanced photosynthetic electron transfer efficiency and carbon metabolism, but inappropriate combinations led to errors in DNA replication and protein synthesis, inhibiting carbon fixation and biomass production.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
R. Serna-Garcia, P. Ruiz-Barriga, G. Noriega-Hevia, J. Serralta, M. Paches, A. Bouzas
Summary: A pilot-scale microalgae and primary sludge anaerobic co-digestion plant was successfully operated for one year in an anaerobic membrane bioreactor, achieving high stability and substrate degradation efficiency. Nutrient-rich effluent streams were obtained, allowing nitrogen and phosphorus recovery. Sanitised and stable compost was successfully produced through composting process.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Chemistry, Multidisciplinary
Fadila Al Khawli, Francisco J. Marti-Quijal, Noelia Pallares, Francisco J. Barba, Emilia Ferrer
Summary: This study aimed to evaluate the recovery of high added-value compounds from Phaedoactylum tricornutum assisted by ultrasound, and optimized the extraction of proteins, carbohydrates, pigments and antioxidant compounds using response surface methodology. Results showed that carbohydrate extraction was influenced by temperature, while carotenoid extraction was mainly affected by extraction time. Total polyphenols were significantly affected by extraction time. Antioxidant capacity was modulated by extraction time for ABTS assay, and by temperature and extraction time for ORAC assay. Optimal conditions for maximum extraction of nutrients, bioactive compounds and antioxidant capacity were found to be 30 min, 50°C and pH 8.5.
APPLIED SCIENCES-BASEL
(2021)
Article
Agricultural Engineering
Shannan Xu, Shuanhu Hu, Kai Zhu, Yong Liu, Shuang Wang, Hao Chen, Bahram Barati, Manogaran Lakshmikandan
Summary: This study investigated the effects of different illuminations and CO2 conditions on the biomass productivity and macromolecule accumulation of Micractinium sp. YACCYB505. The results showed that high light intensity and increased CO2 concentration enhanced lipid accumulation and biomass productivity, but had a negative impact on protein biosynthesis and carbohydrate content.
BIOMASS & BIOENERGY
(2022)
Article
Environmental Sciences
Alexandre Viruela, Stephanie Aparicio, Angel Robles, Luis Borras Falomir, Joaquin Serralta, Aurora Seco, Jose Ferrer
Summary: A kinetic model of autotrophic microalgal growth in sewage was developed to determine the biokinetic processes involved, including carbon-, nitrogen- and phosphorus-limited microalgal growth, dependence on light intensity, temperature and pH, light attenuation and gas exchange to the atmosphere. The model showed great potential in predicting microalgae production and compliance with discharge limits, making it an effective tool for the industry.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Agricultural Engineering
Lei Yang, Ashiwin Vadiveloo, Ai-Jie Chen, Dong-Zhi Chen, Feng Gao
Summary: In this study, the use of phytohormone gibberellins (GAs) was found to enhance sulfamethoxazole (SMX) removal and lipid accumulation in Chlorella vulgaris microalgae. The addition of GAs increased the SMX removal rate and lipid productivity compared to the control group. GAs promoted stress tolerance and lipid accumulation by up-regulating antioxidase-related genes and genes related to the carbon cycle of microalgal cells. This study highlights the potential of using exogenous GAs to improve the economic benefits of microalgae-based antibiotics removal and biofuel production.
BIORESOURCE TECHNOLOGY
(2023)
Article
Environmental Sciences
Rui Hu, Haowen Feng, Haixing Chang, Zhuanqin Wei, Chaofan Zhang, Nianbing Zhong, Yue Zhang, Shicheng Zhang, Shih-Hsin Ho
Summary: This study proposes a technique integrating granular activated carbon (GAC) pretreatment and microalgae bioremediation to improve the utilization efficiency of reverse osmosis concentrate (ROC). The technique achieves efficient nitrogen and phosphorus removal, as well as high microalgal biomass and lipid yield, which is conducive to energy valorization. The chromaticity degradation mechanism of ROC is revealed through three-dimensional fluorescence spectroscopy visualization analysis.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Chemistry, Multidisciplinary
Ana Sanchez-Zurano, Enrique Rodriguez-Miranda, Jose Luis Guzman, Francisco Gabriel Acien-Fernandez, Jose M. Fernandez-Sevilla, Emilio Molina Grima
Summary: The study introduces a microalgae-bacteria consortia model for wastewater treatment, calibrated and validated using pig slurry. The model, implemented in MATLAB and calibrated using genetic algorithms, allows simulation of different components in the system for optimal wastewater treatment.
APPLIED SCIENCES-BASEL
(2021)
Article
Environmental Sciences
Xinjuan Hu, Yulie E. Meneses, Jayne Stratton, Soon Kiat Lau, Jeyamkondan Subbiah
Summary: The study integrated ozone pretreatment with microalgae biotreatment to effectively remove organic compounds and nutrients from high concentration meat processing wastewater. Results showed that ozone pretreatment significantly improved color removal and bacteria inactivation, while post biotreatment with microalgae and ACS bacteria enhanced bacterial growth and algal biomass, leading to efficient removal of pollutants.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Proceedings Paper
Multidisciplinary Sciences
Shivani Tiwari, Ravi S. Yadav, Bijoy K. Kuanr
ADVANCED SCIENCE LETTERS
(2018)
Proceedings Paper
Multidisciplinary Sciences
Ravi S. Yadav, Vinay Sharma, Bijoy K. Kuanr
ADVANCED SCIENCE LETTERS
(2014)
Article
Environmental Sciences
Shanshan Ma, Da Li, Yanling Yu, Dianlin Li, Ravi S. Yadav, Yujie Feng
ENVIRONMENTAL POLLUTION
(2019)
Article
Engineering, Chemical
Miao Lv, Zhaohan Zhang, Jiayue Zeng, Junfeng Liu, Muchen Sun, Ravi S. Yadav, Yujie Feng
SEPARATION AND PURIFICATION TECHNOLOGY
(2019)
Article
Agricultural Engineering
Chao Li, Weihua He, DanDan Liang, Yan Tian, Ravi Shankar Yadav, Junfeng Liu, Yujie Feng
BIORESOURCE TECHNOLOGY
(2020)
Article
Engineering, Environmental
Chao Li, Weihua He, DanDan Liang, Yan Tian, Ravi Shankar Yadav, Da Li, Junfeng Liu, Yujie Feng
Summary: The periodic anaerobic and starving treatment effectively regulated the operation of microbial electrochemical systems by eliminating filamentous bulking, rebuilding an electrochemically active cathode biofilm, increasing current density and power density, reducing effluent chemical oxygen demand, as well as enhancing biomass adhesion ratio and biomass specific biocatalytic activity. It also decreased oxygen diffusion resistance and charge transfer resistance, maintaining a functional cathodic bio-community.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Chao Li, Weihua He, DanDan Liang, Yan Tian, Zeng Li, Ravi Shankar Yadav, Fei Wang, Yanling Yu, Yujie Feng
Summary: The study shows that the low-cost biocathode microbial electrochemical system has potential advantages in wastewater treatment, such as high COD removal efficiency and low sludge yield.
JOURNAL OF POWER SOURCES
(2021)
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)
