Article
Environmental Sciences
Z. Safar, C. Chassagne, S. Rijnsburger, M. Ibanez Sanz, A. J. Manning, A. J. Souza, T. van Kessel, A. Horner-Devine, R. Flores, M. McKeon, J. D. Pietrzak
Summary: This study conducted a survey using different monitoring techniques in the Rhine-ROFI region to classify and characterize suspended particles. The results showed the presence of highly anisotropic particles leading to multiple peaks in the particle size distributions. By combining different techniques, meaningful particle size distributions and size information were obtained.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
S. N. Laursen, M. Fruergaard, T. J. Andersen
Summary: Land-based sources of positively buoyant HDPE microplastics are likely to settle and accumulate in estuarine environments, increasing the concentration of microplastics in the benthic zone.
MARINE POLLUTION BULLETIN
(2022)
Article
Engineering, Chemical
Alexander P. G. Lockwood, Jeffrey Peakall, Nicholas J. Warren, Geoff Randall, Martyn Barnes, David Harbottle, Timothy N. Hunter
Summary: In this study, polyacrylamide-poly(acrylic acid) copolymers were used to flocculate magnesium hydroxide suspensions, and various techniques were utilized to investigate the structural characteristics of the resulting flocs. The FMRZ settling model provided an approximation of zonal settling rates, with larger flocs dominating settling dynamics by 'netting' smaller particles. However, the model was found to be critically sensitive to small changes in fractal dimension when further examined by multivariate analysis.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Wei Wang, Xiaomin Tang, Ting Huang, Gang Yang, Xuemei Tan, Liangjun Long, Bin Yan, Huijun Zhang
Summary: The extracellular organic matters (EOMs) from algae pose a threat to public health and the environment. Characteristics of EOMs, including their hydrophobic nature and diverse functional groups, contribute to their bridging and adsorption in the flocculation process of colloidal particles in water. Additionally, the use of polyaluminum chloride (PAC) in combination with EOMs can lead to larger floc formation compared to using PAC alone.
SEPARATION SCIENCE AND TECHNOLOGY
(2022)
Article
Environmental Sciences
Luyanda L. Ndlela, Peter Schroeder, Bettina Genthe, Catarina Cruzeiro
Summary: The intensive use of antibiotics has led to the release of large amounts of antibiotic residues into aquatic systems due to inefficient wastewater treatment. Conventional treatments cannot effectively remove emerging contaminants like antibiotics. Algae treatment shows promise as a cost-effective and eco-friendly solution. This study demonstrates the potential of using well-established algal consortia for the removal of antibiotics in wastewater in a developing country context.
Article
Green & Sustainable Science & Technology
Sujeet Kesharvani, Tikendra Nath Verma, Gaurav Dwivedi
Summary: The development and implementation of green alternatives is crucial for power and transportation systems. Microalgae are considered favorable for producing biodiesel and using it in diesel engines. This study investigated the combustion characteristics of a diesel engine using different compression ratios and biodiesel blends. The results showed that higher compression ratios led to increased combustion efficiency and reduced emissions, with CPB20 blend performing the best among the tested blends.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2023)
Article
Environmental Sciences
Jiawen He, Wanqing Ding, Wei Han, Yidi Chen, Wenbiao Jin, Xu Zhou
Summary: The bacterium Citrobacter W4 isolated from microalgae sewage culture system exhibited high flocculating activity against Chlorella pyrenoidosa. Optimization of operation parameters under outdoor conditions resulted in efficient harvesting with Citrobacter W4. The microbial community analysis revealed the dominance of Citrobacter W4 in the harvesting process, with active substances mainly composed of protein, polysaccharides, and carboxylic acid promoting flocculation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Agricultural Engineering
Rohan Sharma, Myeongsub Kim
Summary: Microalgae biofuels have the potential to meet national energy demands due to their high oil-to-fuel yield. However, limited harvesting efficiency is a challenge. In this study, a spiral microalgae separator was developed and selected parameters of the algal medium were manipulated to achieve more concentrated algal slurry. Concentration, temperature, and pH manipulation were found to improve separation efficiency.
BIOMASS & BIOENERGY
(2022)
Article
Engineering, Environmental
Khoa Nam Ngo, Tim Van Winckel, Arash Massoudieh, Bernhard Wett, Ahmed Al-Omari, Sudhir Murthy, Imre Takacs, Haydee De Clippeleir
Summary: This study developed an empirical function based on a practical experimental approach to calculate the settling coefficient r(p) value, improving the accuracy and predictive power of settling clarifier models. The proposed empirical function was validated over four years with five different sludge types, demonstrating good effluent quality prediction and advancing the predictive capabilities of clarification models towards effluent quality and clarifier performance.
Article
Environmental Sciences
Burenjargal Amarjargal, Tuba Tasdemir
Summary: This study compared the laboratory graduated cylinder and jar test methods in evaluating the flocculation performance of polymers. The results showed significant differences in turbidity and settling rate values between the two methods. The jar test was found to be more effective in determining the optimal polymer dosage and achieving better particle removal efficiency, while the graduated cylinder test provided more accurate settling rate values.
WATER AIR AND SOIL POLLUTION
(2023)
Article
Engineering, Environmental
Dokyung Kim, Yooeun Chae, Minjin Kim, Youn-Joo An
Summary: This study investigated the impact of ethylenediaminetetraacetic acid (EDTA) on the toxicity of boron to the algae species Chlamydomonas reinhardtii, Chlorella sorokiniana, and Chlorella vulgaris. C. vulgaris was the least sensitive to boron in the presence of EDTA, while C. reinhardtii and C. sorokiniana exhibited high sensitivity. The chelation of EDTA with micronutrients reduced their availability for uptake by the algae, leading to increased sensitivity to boron. These findings have implications for assessing and managing boron risk in aquatic ecosystems.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Environmental
Lin Li, Wenhong Chen, Yuyu Wang, Yao Zhang, Huaimin Chen
Summary: Hydrodynamic turbulence enhances the efficiency of autoflocculation in Chlorella vulgaris by increasing the probability of cell contact and accumulation of EPS. However, excessive shear strength and energy dissipation efficiency can lead to the disaggregation of algal flocs. This study demonstrates that hydrodynamic control can be a cost-effective approach for harvesting algae products with high separation efficiency.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Energy & Fuels
Shamshad Khan, M. Naushad, Jibran Iqbal, Chinna Bathula, Gaurav Sharma
Summary: Biofuel derived from microalgae has become an environmentally friendly alternative to conventional fossil fuels, but there are still technical and economic challenges in mass production and harvesting. This review discusses the difficulties in establishing an integrated system for large-scale microalgal production and harvesting, as well as the advancements in harvesting methods and opportunities for genetic engineering.
Article
Construction & Building Technology
Daiqiang Deng, Guodong Cao
Summary: Due to the unique geological mineralization, tailings from Chenchao Iron Mine have slow natural sedimentation, requiring the use of flocculating agents for acceleration. Among them, the special BASF flocculant shows the most efficient sedimentation, meeting the requirements for future filling technologies.
ADVANCES IN CIVIL ENGINEERING
(2021)
Article
Agricultural Engineering
Megha Mathur, Ankur Kumar, Thilini U. Ariyadasa, Anushree Malik
Summary: This study describes the use of yeast-assisted algal flocculation to obtain nutrition-enriched algae-yeast flocs, which have higher protein content and a more favorable amino acid ratio compared to individual algae or yeast biomass. The flocs were found to be rich in polyunsaturated fatty acids and could be a potential alternative for food applications.
BIORESOURCE TECHNOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Benjamin T. Smith, Jeffrey S. Knutsen, Robert H. Davis
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
(2010)
Article
Engineering, Chemical
Benjamin T. Smith, Robert H. Davis
CHEMICAL ENGINEERING SCIENCE
(2013)
Article
Biotechnology & Applied Microbiology
Benjamin T. Smith, Jeremy Halperin, Al Darzins, Robert H. Davis
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2013)
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)