Browsing by Author "Onay, M."

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Biobutanol From Microalgae
(Elsevier, 2022) Onay, M.
Biobutanol is one of the promising biofuels. It can be preferred because of energy density for biofuel. But, the fermentation process for biobutanol production has less productivity efficiency due to the inhibitory effects of some compounds. The reaction has a two-step process. Firstly, butyric and acetic acids occur in the reaction. Then, acetone, butanol, and ethanol generate in the product. This process maintains by means of the acetone-butanol-ethanol (ABE) fermentation. Biobutanol can be produced via plants and plant wastes. However, these feedstocks have limitations due to their lower growth rates and productivity efficiencies for production. Due to these disadvantages, scientists have studied microalgae nowadays. They can be used for biobutanol production because of their higher growth rates and compositions. This chapter explains how to produce biobutanol from microalgae. Also, this study investigates the disruptive technological approaches from biobutanol production from microalgae and it includes the novel studies on biobutanol. © 2022 Elsevier Inc. All rights reserved.
Bioethanol Production in Algal Bioreactors
(Elsevier, 2024) Onay, M.; Onay, A.
Microalgae are one of the main issues that scientists have been focusing on recently since the valuable compounds and metabolites they contain are used in industry, food, pharmacy, medicine, environmental engineering, and the energy industries. Downstream and upstream processing applications of algae cultures are important for obtaining high-value products. Bioethanol is a type of biofuel that can be obtained from microalgae as a result of sugar production and fermentation processes. The bioethanol process and content are affected by manipulations made in the fermentation process or the types of organisms that provide the fermentation. Furthermore, bioreactor design is an upstream process, and bioreactors are extremely crucial in growing microalgae for fuel production. There are many different sizes, shapes, and materials for bioreactors that can be used to grow microalgae. This study investigates experimental and theoretical bioethanol production from microalgae grown in various materials (glassware or polymeric materials) and bioreactor types (flat, glass bottle, column, loop, thin-film, helical, raceways, and bubble column photobioreactor). © 2025 Elsevier Ltd. All rights reserved.
Removal of Micropollutants in Industrial Wastewater Using Microalgae
(wiley, 2024) Onay, M.; Onay, A.
Microalgae are gaining popularity due to their rapid growth and ability to use organic metabolism, for the removal of micropollutants from wastewater (WW). Micropollutants can be defined as pollutants that are present at the level of micrograms per liter and have a bad effect on the environment and living life and microalgae can remove these compounds, such as organic, inorganic, pharmaceutical, and hormonally active substances, from industrial WW. The purpose of this chapter is to explain how microalgae can be used to remove micropollutants from industrial WW using methods such as adsorption, bioaccumulation, photodegradation, biotransformation, volatilization, and biodegradation, and to investigate how artificial neural networks, fuzzy logic, random forests, long-short term memory, and reinforcement learning methods in wastewater treatment. © 2024 WILEY-VCH GmbH, BoschstraΒe 12, 69469 Weinheim, Germany.
Scope of the Microalgae Market: a Demand and Supply Perspective
(De Gruyter, 2023) Onay, M.
Microalgae studies have recently become one of the most remarkable topics for humanity due to their wide range of uses. As the variety of products produced from microalgae increases, their usage areas are expanding and the demand is increasing. The most important microalgae cultivated to be used as a product today are Spirulina, Chlorella, Dunaliella, and Haematococcus. These microalgae can be used for some goals, such as the production of food and beverages, animal feeds, cosmetics, nutraceuticals, dietary supplements, bioremediation, agriculture, and biofuel. Biodiesel, bioethanol, biogas, and biojet fuel can be produced for the energy industry, while anti-inflammatory, anticancer, and antioxidant molecules can be used by the pharmaceutical industry. In addition, supplements, antioxidants, and vitamins contribute to the microalgae industry. Animal feeds, vegan foods, and colorants can be produced for the food industry. On the contrary, some molecules such as fucoxanthin, fucosterol, dolastatin, cannabinoids, and glucans will make significant contributions to the microalgae market in the future, and the microalgae market will expand with high production of these products. Before these products are obtained, microalgae are extracted and they go through many processes in order to meet the demand of the market. With the process integration and process intensification approaches, these can be produced as high-value-added products at a higher efficiency. Today, the value of microalgae-based products is approximately 1.25 billion dollars per year. This market will increase with the variety of algae products, supply chain features, and lower costs in algae production processes. From the point of view of the supply and demand chain, this chapter emphasis about how important the microalgae market is. © 2023 Walter de Gruyter GmbH, Berlin/Boston. All rights reserved.