Browsing by Author "Ayas, Zehra Sapci"

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Coproduction of Biofuel and Pigments From Micractinium Sp. Using Uv-Induced Mutagenesis and Adding Abscisic Acid and Salicylic Acid for Biorefinery Concepts
(Springer Heidelberg, 2024) Onay, Melih; Ayas, Zehra Sapci
In this study, Micractinium sp. was randomly mutated by UV mutagenesis, and the contributions of Micractinium strains to the total biofuel and pigment production were investigated by adding abscisic and salicylic acid and examining the antioxidant activities of the strains to determine how they responded to these environmental and genetic alterations. As a result, compared with the control, the M-25 strain with 8 mg/L salicylic acid exhibited an increase of 54% in biodiesel production and 23% in biobutanol production, providing the maximum lipid percentage of 40%, whereas the M-7 strain and 0.2 mg/L abscisic acid showed an increase of 77% in biobutanol production while providing the highest carbohydrate percentage of 23%. The maximum total biofuel production was 139% for M-25 at 8 mg/L salicylic acid, and the highest amount of carotenoids (10.8 mg/g) was found to be approximately twice as high in the M-25 strain at 0.2 mg/L abscisic acid compared with the control.
Examination of the Problems Experienced in Urban and Industrial Wastewater Treatment Facilities and Constructed Wetlands and Identification of Circumstances in the Case of the Yozgat Province of Turkey
(Parlar Scientific Publications (p S P), 2021) Ayas, Zehra Sapci; Fidan, Ahmet; Avsar, Edip
In this study, the state of wastewater treatment facilities in the Yozgat province of Turkey was explored, and upon collection of samples from the facility outlets, problems encountered in the facilities were evaluated on the basis of the results of sample analysis, and solutions were proposed. To this end, five urban wastewater treatment facilities, five industrial wastewater treatment facilities and thirty constructed wetlands were examined. It was found that the samples received from five industrial wastewater treatment facilities operating in different sectors had values below the standards which specified in the Water Pollution Control Regulation of Turkey (WPCR). In the analysis perfoimed in constructed wetlands located in towns with different population sizes, it was ascertained that they stood idle because of erroneous construction, wrong selection of plants, devastation of plants by animals and the absence of maintenance staff