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001-es BibID:	BIBFORM115525
Első szerző:	Nurul, Amalina Nadya (MSC hallgató)
Cím:	Advances in biomass growth of Chlorella vulgaris under various CO2 and pH achieving sustainable microalgae cultivation / Nadya Nurul Amalina, Péter Tamás Nagy, Tamás Magyar
Dátum:	2023
Megjegyzések:	Microalgae have an increasing interest in various sectors. They are photosynthetic organisms that utilize the sunlight to make various organic compounds from carbon fixation. Microalgae can be beneficial for the sustainability; it can assist with the achieving of several SDGs such as zero hunger (SDG-2), clean water and sanitation (SDG-6) as well as affordable and clean energy (SGD-7). However, the production of microalgae biomass is limited due to various nutritional and environmental conditions such as pH and CO2 concentration in the nutrient solution. So it is crucial to investigate the effects of different pH level and CO2 injections on microalgae (Chlorella vulgaris) cultivation. The aim of this research was to investigate the biomass growth of Chlorella vulgaris microalgae with special regards to the pH level of the nutrient solution (7, 9.6, 10.2 and 11.0) and CO2 injection (0 ml/min, 2 ml/min, 3.5 ml/min and 5 ml/min). The samples were investigated over a 6 weeks of period from a chemical as well as biological point of view. For the chemical measurements, PF-12 plus photometer with VisoColor test kits were used and the following parameters were measured: NH4+, NO3-, K+, PO43-, chemical oxygen demand (COD), pH and electric conductivity (EC). AlgaeToximeter II was used to determine the biological parameters such as chlorophyll concentration in different microalgae classes and microalgae activity rate. Moreover, the change in chlorophyll A was tracked over the examination period by a UV-Vis spectrophotometer. Based on the experiments performed in this study, the highest biomass growth was achieved in case of the 2 ml min-1 of CO2 injected sample with the value of 2,211 ?g L-1 in chlorophyll concentration, followed by the 3.5 ml min-1 of CO2 injected sample (1,504.6 ?g L-1 in chlorophyll concentration). Comparing the sample of 2 ml min-1 of CO2 injection to the control one (0 ml min-1), the biomass increase was found to be +60.8%, however the injected CO2 drastically decreased the microalgae activity rate from the initial value of 66.6% to 35.23%. Variable pH also had a significant effect on the biomass growth of Chlorella vulgaris microalgae. Neutral pH (7) resulted in the highest chlorophyll concertation with the value of 1,853.5 ?g L-1, moreover it was found that alkaline pH (9.6, 10.2 and 11.0) could have an impulsive stimulation effect on the biomass increase in the first 10 days. In the future, combining the 2 ml min-1 of CO2 injection with an alkaline pH nutrient solution could be a promising solution in order to shorten the cultivation time, while resulting in higher biomass generation, thus contributing to the sustainability.
Tárgyszavak:	Műszaki tudományok Agrárműszaki tudományok előadáskivonat könyvrészlet biomass growth microalgae cultivation nutrient solution sustainability
Megjelenés:	Absztraktkötet : III. Környezet, Egészség, Biztonság (EHS) Nemzetközi Szimpózium = Book of abstracts : 3 rd International Symposium on Environmental, Health and Safety (ISEHS). - p.22.
További szerzők:	Nagy Péter Tamás (1970-) (vegyész) Magyar Tamás (1987-) (környezetgazdálkodás)
Internet cím:	Szerző által megadott URL Intézményi repozitóriumban (DEA) tárolt változat
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