Browsing by Author "Poblete, Rodrigo"
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Publication Disinfection of the water recovered from drying of aquaculture scallop sludge(Elsevier Sci Ltd, 2023-12-06) Poblete, Rodrigo; Valencia, Leslie; SALİHOĞLU, GÜRAY; Salihoğlu, N. Kamil; SALİHOĞLU, NEZİH KAMİL; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Çevre Mühendisliği Bölümü.A substantial volume of saline sludge with high water content is generated by the aquaculture industry, particularly during bivalve production. The reclamation of water from this sludge becomes particularly crucial in arid regions. This study is the first of its kind to focus on recovering water from sludge produced during the aquaculture of scallops and the subsequent disinfection of this water to remove heterotrophic microorganisms. The method employed involved a solar still followed by a condensation system for water recovery. We obtained 250 kg of wet sludge from the industrial production of scallop culture (Argopecten purpuratus) through the rotary drum filter, which is used for lantern washing. This sludge was subjected to drying in a solar still dryer. The vapor generated during the drying process was condensed using a heat exchanger, resulting in the recovery of 1680 mL of water, accounting for 91% of the sludge mass, with a Gain Output Ratio of 1.6. The recovered water un-derwent disinfection using various methods, including UV-A, UV-A/O3, UV-C, UV-C/O3, and O3. Among these, the UV-C/O3 process demonstrated the highest removal of Total Cultivable Bacteria, achieving complete disin-fection within 60 min of treatment. UV-C was the second most effective treatment, with a bacteria removal rate of 99.92% in the same timeframe. Electrical energy used to reduce bacteria concentration by one order of magnitude was 12.96 kWh/m3 when UV-C process was applied, and 32.92 kWh/m3 when UV-C/O3 process was applied. In conclusion, this study showcases that a significant quantity of water can be reclaimed from scallop sludge through a combination of solar drying and a condensation system. Moreover, this recovered water can be efficiently disinfected using the UV-C/O3 process.Publication Incorporation of solar-heated aeration and greenhouse in grass composting(Springer, 2021-01-26) Poblete, Rodrigo; Salihoğlu, Güray; Salihoğlu, Nezih Kamil; SALİHOĞLU, GÜRAY; SALİHOĞLU, NEZİH KAMİL; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Çevre Mühendisliği Bölümü; 0000-0003-0714-048X; AAG-9399-2021; AAG-9413-2021Composting is an environment-friendly method for recycling organic waste, and incorporation of heat and aeration can enhance favorable conditions for microbial growth in the process. This research aimed to evaluate the influence of the introduction of solar heat and aeration to the waste grass exposed to the composting process. The compost piles studied were subjected to different processes: application of solar-heated aeration, only-aeration, solar heating with a greenhouse, and control. Solar-heated air was introduced to a compost pile of grass clippings and compared with a greenhouse compost system. The composting process of 70 days was monitored for temperature, oxygen, moisture, organic matter loss, and humification rate. Germination index has been used to evaluate the maturation of the composts produced. The highest temperature was obtained at the compost pile with the greenhouse. This system reached the highest temperature (68.2 degrees C) on day 15; the ambient temperature on that day was 20.6 degrees C. The decreases in the C/N ratios after day 70 of composting were 20% and 15% for the greenhouse and the system where solar-heated air was introduced, respectively. Although the temperature of the solar-heated air was higher than that of the greenhouse, thermophilic temperature levels could not be reached in the aerated compost pile, which indicated a cooling effect of excessive aeration even with the heated air. Composting of grass clippings resulted in a decrease in organic matter content and enhancement in seed germination and root growth, obtaining high GI levels, inferring no phytotoxicity. This study showed that composting of grass clippings with low C/N ratios and high humidity can still be possible by using solar energy.Item Investigation of the factors influencing the efficiency of a solar still combined with a solar collector(Desalination, 2016-06-13) Poblete, Rodrigo; Salihoğlu, Güray; Salihoğlu, Nezih Kamil; Uludağ Üniversitesi/Mühendislik Fakültesi/Çevre Mühendisliği Bölümü.; AAG-9399-2021; AAG-9413-2021; 8551769300; 55665111200A solar still was designed for the evaporation of desalination brine. The influence of several factors, such as the basin heating, the material of the cover (glass or polycarbonate), the existence of a mirror, the activation of an air extractor, and the existence of a black painted floor in the solar still, was evaluated in terms of their contribution to brine evaporation. The experiments were conducted with a factorial design approach. The combination of the factors that produced the best results was used in a subsequent daily monitoring study for brine evaporation. The monitoring parameters were the hourly average incident radiation, the changes in the temperature, the brine mass, and the brine volume. The accumulated amounts of the solar energy were calculated, and the correlation relationship was assessed.Item Landfill leachate treatment using advanced oxidation processes(Scibulcom, 2016) Poblete, Rodrigo; Salihoğlu, Nezih Kamil; Salihoğlu, Güray; Uludağ Üniversitesi/Mühendislik Fakültesi/Çevre Mühendisliği Bölümü.; AAG-9399-2021; AAG-9413-2021; 55665111200; 8551769300This study aimed to establish the efficiency of ozone-based oxidation processes in the treatment of landfill leachate. Two reactors, one equipped with a UVc lamp, the other subjected to natural sunlight, were set up for experimental purposes. TiO2 was used as a catalyst in some of the experiments. Four groups of treatment routes, namely UVSUN + O-3, UNc + O-3, UVSUN + O-3 + TiO2 and UV, + O-3 + TiO2, were applied to treat the leachate by using the two reactors. After the application of each treatment route, chemical oxygen demand (COD), oxide reduction potential (ORP), pH, ozone levels and temperatures were measured. Highest COD removal efficiency of 61% was obtained with the treatment route of UVsun + O-3 + TiO2 followed by UVsun + O-3 (32% COD removal), UVc + O-3 + TiO2 (21% COD removal) and UVc + O-3 (19% COD removal). A positive correlation was found between the ORP levels and COD removal efficiency. Use of TiO2 as a catalyst, increased the COD removal efficiencies, however, did not affect the ORP levels.Publication Optimization of the solar brine evaporation process: Introduction of a solar air heater(Wiley, 2019-05-01) Poblete, Rodrigo; Salihoğlu, Nezih Kamil; Salihoğlu, Güray; SALİHOĞLU, NEZİH KAMİL; SALİHOĞLU, GÜRAY; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Çevre Mühendisliği Bölümü.; 0000-0002-7730-776X; 0000-0003-0714-048X; AAG-9399-2021; AAG-9413-2021The purpose of this study was to investigate the evaporation process of reject brine by using a solar system. The solar system contained a solar still coupled with a solar air heater (SAH). Solar still had a heated base, which was connected to the solar collector with a copper pipe. The influence of the introduction of the SAH to the system and increased levels of air mass flowrates was investigated. Variations in temperature and solar irradiation were monitored as well as brine evaporation. Introducing the SAH and increasing the air mass flowrate resulted in faster brine evaporation, higher utilization rate of solar radiation, higher brine, and base temperature levels within the solar still compared to the system without the SAH. The mean base temperature of the system with the SAH was 43.46 +/- 11.3 degrees C, while that of the system without the SAH was 30.62 +/- 7.35 degrees C. The use of the SAH and high air mass flowrates influenced the temperature distribution within the solar still, which affected the evaporation of the brine in a positive way. Introduction of the SAH and high air mass flowrate increased the drying efficiency of the solar system at a level of 120%. (c) 2018 American Institute of Chemical Engineers Environ Prog, 38:e13062, 2019Item Ultrasound and heterogeneous photocatalysis for the treatment of vinasse from pisco production(Elsevier, 2020-03) Poblete, Rodrigo; Cortes, Ernesto; Salihoğlu, Güray; Salihoğlu, Nezih Kamil; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Çevre Mühendisliği.; AAG-9399-2021; AAG-9413-2021; 8551769300; 55665111200Production of the distilled alcohol pisco results in vinasse, dark brown wastewater with high polyphenols contents and chemical oxygen demand (COD). No prior research exists on the efficiency of advanced oxidations processes (AOPs) in treating pisco vinasse. Therefore, the purpose of this study was to assess the efficiency of ultraviolet (UV), ultrasound (US), US + UV, heterogeneous photocatalysis (HP), and HP + US treatments. Polyphenols, COD, and color removal, as well as oxidation-reduction potential, were monitored over a 60-minute treatment period. Energy consumption levels and synergies were also calculated. The HP + US treatment achieved the best removal ratios for polyphenols (68%), COD (70%), and color (48%). While the HP treatment was the second most efficient in terms of polyphenols (62%), COD (58%), and color (40%) removal, this AOP comparatively required the least amount of energy. Considering the energy efficiency and relatively high pollutant-removal rates of the HP treatment, this AOP is recommended as a practical alternative for treating pisco vinasse.