Person: UĞUZ, SEYİT
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Publication Air quality measurements in four sheep barns part ii: Pollutant gas emissions(Springer, 2021-01-04) Kılıç, İlker; Şimşek, Ercan; Yaşlıoğlu, Erkan; Heber, Albert; Uğuz, Seyit; KILIÇ, İLKER; ŞİMŞEK, ERCAN; YASLIOĞLU, ERKAN; UĞUZ, SEYİT; 0000-0002-3865-7863; 0000-0002-3994-8099; 0000-0003-0087-6718; ABH-7275-2020; AAH-3553-2021; AAG-8511-2021; ABE-6643-2020Pollutant gas emissions from animal barns affect indoor air quality, the health and well-being of farmers, and the surrounding environment. This study was carried out in four sheep barns (SB) in Bursa, an important region for animal husbandry operations. Concentrations of NH3, CO2, H2S, and CH4 were measured in four sheep barns by monitoring throughout 24 h in 1 year. Pollutant gas emissions from barns were also calculated and modeled. The average pollutant gas emissions obtained in this study were 5 kg day(-1) barn(-1) for NH3, and 18 kg day(-1) barn(-1) for CH4. The average NH3 and CH4 emissions from each barn were 2.1 and 2.7 kg day(-1) barn(-1) for SB1; 9.4 and 12.9 kg day(-1) barn(-1) for SB2; 4.0 and 3.6 kg day(-1) barn(-1) for SB3; and 4.5 21 kg day(-1) barn(-1) for SB4, respectively. There are statistically significant differences between daytime and nighttime for pollutant gas emissions. Pollutant gas emissions in the monitored barns are generally higher in summer than in other seasons. Models for estimating NH3, and CH4 emissions were developed using measured temperature and relative humidity values in the barns. These models can only be used in the Bursa region. The results of this study were compared with other studies under similar conditions in the literature.Publication Multi-criteria decision analysis for optimizing co 2 and nh 3 removal by scenedesmus dimorphus photobioreactors(Mdpi, 2023-07-01) Arsu, Talip; Yang, Xufei; Anderson, Gary; Uğuz, Seyit; UĞUZ, SEYİT; 0000-0002-3994-8099; 0000-0002-6735-4597; 0000-0002-9734-631X; ABH-7275-2020Numerous technologies have been investigated for mitigating air pollutant emissions from swine barns. Among them, algal photobioreactors (PBRs) can remove and utilize air pollutants such as CO2 and NH3 from barn exhaust. However, a challenge to PBR operation is that it involves multiple system input parameters and output goals. A key question is then how to determine the appropriate CO2 and NH3 concentrations in this case. Conventional statistical methods are inadequate for handling this complex problem. Multi-criteria decision-making (MCDM) emerges as a practical methodology for comparison and can be utilized to rank different CO2-NH3 interactions based on their environmental and biological performance. By employing MCDM methods, producers can effectively control the ratio of CO2 and NH3 concentrations, enabling them to identify the optimal range of operating parameters for various housing types, ensuring efficient pollutant mitigation. In this study, a multi-criteria decision-making (MCDM) approach was employed to support operation management. Specifically, influent CO2 and NH3 concentrations were optimized for three scenarios (the best biological, environmental, and overall performance), using a combination of two MCDM techniques. This study is anticipated to facilitate the system analysis and optimization of algae-based phytoremediation processes.Publication Makeup water addition can affect the growth of scenedesmus dimorphus in photobioreactors(Mdpi, 2023-06-01) Osabutey, Augustina; Haleem, Noor; Albert, Karlee L.; Anderson, Gary A.; Min, Kyungnan; Yang, Xufei; Uğuz, Seyit; UĞUZ, SEYİT; Ziraat Fakültesi; Biyosistem Mühendisliği Ana Bilim Dalı; 0000-0002-3994-8099; ABH-7275-2020Makeup water constitutes a key component in the water management of microalgal cultivation systems. However, the effect of makeup water addition on microalgal growth remains largely unexplored. This study compared two deionized water addition intervals (1 day and 4 days) for their effect on the growth of Scenedesmus dimorphus (S. dimorphus hereafter) in 2000 mL Pyrex bottles under controlled conditions. Cell counts and dry algal biomass (DAB) were measured to characterize the microalgal growth rate. Water addition intervals impacted algal cell counts but had little effect on DAB. Adding makeup water every day resulted in a higher growth rate (8.80 & PLUSMN; 1.46 x 10(5) cells mL(-1) day(-1); p = 0.22, though) and an earlier occurrence of the peak cell count (day 9) than adding it every 4 days (6.95 & PLUSMN; 1.68 x 10(5) cells mL(-1) day(-1) and day 12, respectively). It is speculated that water loss over an extended period and the following makeup water addition posed stress on S. dimorphus. Surpassing the peak cell count, S. dimorphus continued to grow in DAB, resulting in an increased cell weight as a response to nutrient starvation. Optical density at 670 nm (OD670) was also measured. Its correlation with DAB was found to be affected by water addition intervals (R-2 = 0.955 for 1 day and 0.794 for 4 days), possibly due to a water loss-induced change in chlorophyll a content. This study is expected to facilitate the makeup water management of photobioreactor and open pond cultivation systems.Publication Viability of artificial rain for air pollution control: Insights from natural rains and roadside sprinkling(Mdpi, 2023-12-01) Haleem, Noor; Kumar, Pradeep; Jamal, Yousuf; McMaine, John; Yang, Xufei; Uğuz, Seyit; UĞUZ, SEYİT; Ziraat Fakültesi; Biyosistem Mühendisliği Bölümü; 0000-0002-3994-8099; ABH-7275-2020; ABA-6989-2021; GSE-5518-2022; KHX-3052-2024Artificial rain, a technology primarily used for drought relief, has recently been used for combating regional air pollution. However, there are limited available measurement data to confirm the effectiveness of this control practice. In this study, we summarize control theories and indirect but relevant observations/findings, including air pollutant reduction after natural rain events and roadside sprinkling. A brief review of artificial rain basics is also provided. Our work shows that artificial rain appears to be a promising management strategy for air pollution control. However, field measurements are needed to further assess the cost-effectiveness of the practice, as well as the other benefits or challenges it may create.Publication Nutritional value of microalgae and cyanobacteria produced with batch and continuous cultivation: Potential use as feed material in poultry nutrition(MDPI, 2023-11-01) Uğuz, Seyit; Sözcü, Arda; UĞUZ, SEYİT; SÖZCÜ, ARDA; Ziraat Fakültesi; Biyosistem Mühendisliği Bölümü; 0000-0002-3994-8099; 0000-0002-0955-4371; ABH-7275-2020; DUR-2892-2022Recently, the demand for new alternative feedstuffs that do not contain chemical residue and are not genetically modified has been increased for sustainability in poultry production. In this respect, the usage of algae as animal feed is very promising as an alternative feed ingredient that reduces pollutant gases from animal production facilities. The aim of the current study is to investigate the usage possibility of algae, through determining nutritional value and production cost, as a feed ingredient in poultry nutrition. Three microalgae species, including Scenedesmus sp., Ankistrodesmus sp., and Synechococcaceae, were produced with batch and continuous cultivation to determine the difference in the lipid, protein, carbohydrate, fatty acid, and amino acid profiles, as well as the color characteristics and production cost. The highest lipid content of 72.5% was observed in algae biomass produced from Synechococcaceae with batch cultivation, whereas the highest protein level was found in algae biomass produced by Synechococcaceae under continuous cultivation practice (25.6%). The highest content of PUFA was observed in Scenedesmus sp. harvested from both batch and continuous cultivation (35.6 and 36.2%), whereas the lowest content of PUFA was found in Synechococcaceae harvested with continuous cultivation (0.4%). Continuously cultivated of Scenedesmus sp. had higher carbohydrate content than batch-cultivated Scenedesmus sp. (57.2% vs. 50.1%). The algae biomass produced from Synechococcaceae was found to have a higher content of essential amino acids, except lysine and histidine, compared to Scenedesmus sp. and Ankistrodesmus sp. Cultivation practices also affected the amino acid level in each algae species. The continuous cultivation practice resulted in a higher level of essential amino acids, except glycine. Synechococcaceae had richer essential amino acid content except for proline and ornithine, whereas continuous cultivation caused an incremental increase in non-essential amino acids. The lightness value was found to be the lowest (13.9) in Scenedesmus sp. that was continuously cultivated. The current study indicated that Scenedesmus sp. could be offered for its high PUFA and lysine content, whereas Synechococcaceae could have potential due to its high content of methionine and threonine, among the investigated microalgae and Cyanobacteria.