Bayrakdar, Alper
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Bayrakdar, A.
Bayrakdar,A.
Bayrakdar,A.
Job Title
Email Address
alperbayrakdar@iyte.edu.tr
alperbayrakdar@gmail.com
alperbayrakdar@gmail.com
Main Affiliation
03.07. Department of Environmental Engineering
Status
Current Staff
ORCID ID
Scopus Author ID
Turkish CoHE Profile ID
Google Scholar ID
WoS Researcher ID
Sustainable Development Goals
1NO POVERTY
0
Research Products
2ZERO HUNGER
1
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3GOOD HEALTH AND WELL-BEING
0
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4QUALITY EDUCATION
0
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5GENDER EQUALITY
0
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6CLEAN WATER AND SANITATION
2
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7AFFORDABLE AND CLEAN ENERGY
1
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8DECENT WORK AND ECONOMIC GROWTH
0
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9INDUSTRY, INNOVATION AND INFRASTRUCTURE
0
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10REDUCED INEQUALITIES
0
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11SUSTAINABLE CITIES AND COMMUNITIES
0
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12RESPONSIBLE CONSUMPTION AND PRODUCTION
1
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13CLIMATE ACTION
0
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14LIFE BELOW WATER
0
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15LIFE ON LAND
0
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16PEACE, JUSTICE AND STRONG INSTITUTIONS
0
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17PARTNERSHIPS FOR THE GOALS
0
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Documents
22
Citations
939
h-index
17
Documents
0
Citations
0
Scholarly Output
6
Articles
5
Views / Downloads
2505/565
Supervised MSc Theses
1
Supervised PhD Theses
0
WoS Citation Count
10
Scopus Citation Count
15
Patents
0
Projects
0
WoS Citations per Publication
1.67
Scopus Citations per Publication
2.50
Open Access Source
2
Supervised Theses
1
| Journal | Count |
|---|---|
| Biomass Conversion and Biorefinery | 1 |
| Clean Technologies and Environmental Policy | 1 |
| Journal of Environmental Management | 1 |
| Journal of Water Process Engineering | 1 |
| Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi | 1 |
Current Page: 1 / 1
Scopus Quartile Distribution
Competency Cloud
6 results
Scholarly Output Search Results
Now showing 1 - 6 of 6
Article Citation - WoS: 3Citation - Scopus: 4Enhancing Biogas Production From Chicken Manure Through Vacuum Stripping of Digestate(Springer Heidelberg, 2023) Sengur, Ozlem; Akgul, Deniz; Bayrakdar, Alper; Calli, BarisThe vacuum stripping's combined ammonia removal and disintegration effect on chicken manure digestate was evaluated for the first time at different pH values (8.5, 9.5, and 10.5) and temperatures (30, 50, and 70 degrees C). In this way, the potential increase in biogas production by recirculating the vacuum-stripped digestate to the anaerobic digester was determined. Experimental results showed that increasing pH and temperature significantly increase TAN removal, but pH is more effective. A significant portion of the ammonia was removed in the first 30 min. Therefore, a second set of stripping tests was performed for 30 min and at 70 degrees C and pH 10.5. After 30-min tests, a biomethane potential (BMP) assay was performed using the vacuum-stripped digestate to determine how vacuum stripping affects biomethane production. Despite having the lowest disintegration efficiency, the highest biomethane potential (56.2 +/- 29.7 mL CH4/gVS) was obtained with the digestate, which was subjected to vacuum stripping at 70 celcius without pH adjustment, and 48.7% more methane was produced than the control set. The lower residual biomethane potential in vacuum-stripped digestate at pH 9.5 and 10.5 was attributed to Na+ inhibition resulting from high NaOH consumption for pH adjustment.Article Citation - Scopus: 7How Do the Influent Cod/Nitrogen and Internal Recirculation Ratios Affect the Oxidation Ditch Type Pre-Anoxic Landfill Leachate Treatment?(Academic Press, 2021) Çakirgöz,M.; Bayrakdar,A.; Çalli,B.A design-based dynamic simulation tool was developed to evaluate the effects of altered operation conditions on the performance of a landfill leachate treating pre-anoxic oxidation ditch folowed by external ultra filtration and nano filtration membranesby using the actual influent data and operational constants collected for 18 months. In the summer of 2017, the MBR suffered from reduced membrane fluxes due to deterioration of activated sludge flocs after the failure of flow booster providing the internal circulation and decreasing influent C/N ratio. Although two external pumps were activated in place of the broken flow booster, the required internal recirculation ratio (IR) predicted by the simulation could not be provided. It was concluded that due to low IR, the activated sludge retaining longer in the anoxic tank lost its floc integrity and caused decreased membrane fluxes. Simulation findings also showed that if the COD/N ratio drops below 4.8, no matter how high the IR is, it is unlikely to achieve a NOx-N concentration below 30 mg/l in the effluent. On the other hand, contrary to expectations, both the actual and estimated nitrification efficiencies were very high due to the moderately high temperature (>20 °C) and DO (2–3 mg/l) values in the aerobic basin. © 2020 Elsevier LtdArticle Citation - WoS: 3Anaerobic Co-Digestion of Tannery Solid Waste: Optimum Leather Fleshing Waste Loading(2020) Bayrakdar, AlperIn this study, loading of optimum leather fleshings was investigated with four identical batch reactors with different fleshings and treatment sludge ratios (0:1, 0.25:1, 0.35:1, 0.50:1) to contribute to the state of art of the biogas production from tannery solid wastes. Results showed that lipids-containing leather fleshings boosted the methane production potential. However, H2S inhibition and volatile fatty acids accumulation were the main concern in the anaerobic digestion of these wastes. The modified Gompertz model was applied to the batch tests data to determine the kinetic constants of anaerobic digestion of tannery solid wastes. It was calculated with the model outputs that the ultimate methane production potential and maximum methane production rate in reactors having mixing ratio of 0.35:1 and 0.5:1 (dry basis) were highly similar. 0.35 was found to be an optimum leather fleshing and treatment sludge ratio with a 54% more methane production potential than that of control reactor in this study.Article Citation - WoS: 3Citation - Scopus: 3Optimization of Moving Bed Membrane Bioreactor Process for Improved Water and Nutrient Recovery From Domestic Wastewater(Elsevier, 2025) Bal, Yamac; Pak, Burak Aslancan; Bayrakdar, Alper; Sahinkaya, ErkanHybridizing moving bed biofilm reactor (MBBR) and membrane bioreactor (MBR) processes has been reported to enhance wastewater treatment performance, but there remains a lack of knowledge on the optimal process configuration for water and nutrient recovery, which is important in the design of the process. This study aims to optimize MBBR+MBR (MBMBR) process configuration in terms of minimizing membrane fouling together with maximizing N&P recovery rather than removal, comparing three different MBMBR configurations under various loadings. The studied configurations were MBBR+MBR, two serially connected MBBRs+MBR, and two serially connected MBBRs+MBR with sludge recycling from the MBR to the second MBBR. In all the configurations, the first MBBR showed high COD removal rates (up to 24 g-COD/m(2).d), whereas nitrification was not detected due to high COD loading. Nitrification rates in the second MBBR reached 0.65 and 0.92 g-NH4+-N/(m(2).d), in the absence and the presence of sludge recycling from the MBR, respectively. Hence, hybridizing suspended and attached growth by applying sludge recycle (last configuration) improved the nitrification rate and process stability. In the MBR, complete nitrification was attained throughout the study, together with increasing N&P recovery due to biomass decay at long SRTs. The serial arrangement of MBBRs may allow for a more economical design, as the attached biomass in the first MBBR increased appreciably (>20 g-SS/m(2)) under high COD loadings. The last configuration gave the best performance in terms of N&P recycling and minimizing membrane fouling among the studied alternatives.Article Citation - WoS: 1Citation - Scopus: 1Phosphate Recovery From Digestate Using Magnesium-Modified Fungal Biochar(Springer, 2024) Surmeli, Recep Onder; Madenli, Ozgecan; Bayrakdar, Alper; Deveci, Ece Ummu; Calli, BarisMg-rich biochars have been used for the removal and recovery of phosphate (PO43-) and ammonium (NH4+) from waste streams. In this study, a novel magnesium-modified biochar (Mg-FBC) was synthesized by immobilizing waste magnesite dust (WMD) into Aspergillus niger fungal biomass for the adsorption of PO(4)(3- )and NH4+. Pyrolysis at various temperatures and analysis using techniques such as SEM-EDS, TGA, XRD, FTIR, and BET revealed that biochar produced at 650 degrees C (Mg-FBC650) exhibited enhanced surface properties favorable for effective adsorption. This improvement is attributed to the increased surface area facilitated by the hyphal structure of A. Niger and the effective dispersion of MgO on its surface. In experiments using a synthetic phosphate solution, the adsorption capacity reached 595 mg PO43-/g BC, fitting the Langmuir model at pH 9. In addition, experiments with the liquid fraction of a real digestate (LFD) showed adsorption capacities of 502 mg PO43-/g BC and 150 mg NH4+/g BC, respectively. The adsorption mechanism was elucidated through SEM-EDS, XRD, and FTIR analyses confirming that Mg-FBC650 facilitates a multifaceted adsorption mechanism, including adsorption, electrostatic attraction, chemical precipitation, and surface complexation. Consequently, PO43- was the primary adsorbate in the synthetic solution, while both PO43- and NH4+ were effectively removed from the LFD, indicating that Mg-FBC650 has substantial potential as an efficient adsorbent for nutrient removal. As a result, Mg-FBC650 is believed to hold significant potential as a slow-release and readily transferable bio-fertilizer, particularly suitable for application in soils deficient in organic matter, nitrogen, and phosphorus. [GRAPHICS] .Master Thesis Investigation of Phosphate Recovery From Anaerobic Digestate(01. Izmir Institute of Technology, 2024) Erünsal, İlker; Bayrakdar, Alper; Özkan, AltanFosfat, tarım sektöründe nutrient kaynağı olarak yaygın olarak kullanılan nadir ve yenilenemeyen bir kaynaktır. Fosfatın büyük çoğunluğu madencilik faaliyetlerinden elde edilir. Bunlar göz önüne alındığında, sıvı atıklardan fosforun geri dönüşümü, alternatif ve sürdürülebilir bir kaynak olarak görülebilir. Organik atıkların anaerobik çürütülmesi, fermente ürün adı verilen fosfor açısından zengin bir atık üretir. Bu çalışmanın amacı bu fosfat geri kazanımı potansiyelini incelemektir. Bunun için adsorpsiyon yöntemi ve strüvit çöktürme yöntemi araştırılmıştır. Adsorpsiyon potansiyelleri göz önüne alınarak iki farklı atık maddeden ZnCI2-FeCl3.6H2O ile modifiye biyokömür üretilmiştir. Karşılaştırmalı testler, Mısır Koçanı Biyoçarının (Fe-BC-C) 33 mg/g fosfat adsorpsiyon kapasitesine ulaşırken, Atık Anason Biyoçarının (Fe-BC-A) 41 mg/g'a ulaştığını göstermiştir. Biyoçarlar ile P salınımı ve kontrol deneylerinde her iki biyoçarın da ortama fosfor saldığı ve düşük adsorpsiyon potansiyeline sahip olduğu gözlemlenmiştir. Bu durum, fosfor geri kazanımı için modifikasyon sürecinin önemini göstermiştir. Strüvit çökelmesi laboratuvar ölçekli kolonda ve pilot ölçekli kolonda MgCl2.6H2O ilavesiyle araştırılmıştır. Her iki sistemde de %80'den fazla fosfor geri kazanımı gözlemlenmiştir. Fosfat giderimini etkileyen parametreler pH, Mg/P molar oranı, yukarı akış hızı, reaktör tipi ve sürekli besleme olarak belirlenmiştir.