Extent and persistence of dissolved oxygen enhancement using nanobubbles

Tekile, Andinet; Kim, Il-Ho; Lee, Jaiyeop

doi:10.4491/eer.2016.028

Cited by 28 publications

(18 citation statements)

References 23 publications

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“…[27] reported the reduction of the DO transfer rate from the 10 th minute of measurement and a saturation point from the 28 th , obtaining a maximum saturation value of 95 ± 1,2 % for each of the 4 studied samples. The decrease in the contribution rate of DO in the water samples from values close to the saturation point has also been reported by [28] and [29], who reported that the presence of high DO values, i.e., with a distance less than the maximum point of saturation or stagnation, which requires a greater amount of input time and of oxygenation in the water to reach this saturation point.…”

Section: Discussionsupporting

confidence: 79%

Study of the Influence of Clays on the Transfer of Dissolved Oxygen in Water

Blanco-Zúñiga

Rojas-Arias

Pardo

et al. 2020

Ing.

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Context: The lack of dissolved oxygen (DO) in water bodies has become a serious problem for several ecosystems due to drastic changes in their climatic, biological, and physical conditions. The presence of microorganisms, organic matter, and clays, which are carried by landslides and rainwater, affect the process of restoration and transfer of DO in water, thus making it necessary to study how these factors affect the process of DO transfer in water bodies. Method: This work is focused on studying the influence of clays during the DO transfer process in water bodies. To this effect, samples of clays from the region of Paipa, Boyacá, were added in 1, 3 and 5% by weight into the samples of clean water. The aeration process was performed using a constant flow diffusion system. The tests were carried out until the saturation of dissolved oxygen in each of the water samples was obtained. Results: The results show that the presence of clays during the transfer of DO have little influence on bodies of water. However, variations were observed in time intervals of <5 min in which the increase in the percentage of clays favored the transfer of DO. Conclusions: With these results, it is concluded that the presence of clays can generate a beneficial effect during the transfer of DO in bodies of water with a high oxygen deficiency, whereas, for water samples with a relatively high percentage of DO, clays can hinder the DO restoration process.

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Section: Discussionsupporting

confidence: 79%

Study of the Influence of Clays on the Transfer of Dissolved Oxygen in Water

Blanco-Zúñiga

Rojas-Arias

Pardo

et al. 2020

Ing.

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“…In the performance comparison tests, as shown in Fig. 3(b), concentration of dissolved oxygen was measured less than 0.5 mg/L in all sections, when the conventional air diffuser was used to supply air to the aeration tank and it seemed to be caused by the difference of bubble dissolution rate between the conventional bubbles and microbubbles [12]. Therefore, in the batch type experiments, the experimental conditions to verify separation of zones could be found, when the location of microbubble generator was located at the half of width of the aeration tank and at the operating pressure of 0.5 bar.…”

Section: Batch Type Experimentsmentioning

confidence: 94%

“…These days, many researchers have focused on microbubbles of high level of oxygen transfer efficiency than conventional bubbles [10][11][12]. The size of microbubbles is smaller than the conventional bubbles so the microbubbles have slow rising velocity, long residence time, and large specific interfacial area.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous nitrification and denitrification by using ejector type microbubble generator in a single reactor

Lim

Kim

Park

et al. 2019

Environmental Engineering Research

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This study was performed to verify the possibility of nitrification and denitrification in a single reactor. In batch type experiment, optimal point of experimental conditions could be found by performing the experiments. When supply location of microbubbles was located at half of width of the aeration tank and operating pressure of 0.5 bar, it was possible for zones in the aeration tank to be separated into anoxic and aerobic by controlling air suction rate according to operating pressure of the generator. To be specific, the concentration of dissolved oxygen (DO) in zone 1 and 2 of the aeration tank could be maintained as less than 0.5 mg/L. Also, in the case of concentration of oxygen in zone 3 and 4, the concentration of DO was increased up to 1.7 mg/L due to effects of microbubbles. In continuous flow type experiment based on the results of batch type experiments, the removal efficiency of nitrogen based on T-N was observed as 39.83% at operating pressure of 0.5 bar and 46.51% at operating pressure of 1 bar so it was able to know that sufficient air suction rate should be required for nitrification. Also, denitrification process could be achieved in a single reactor by using ejector type microbubble generator and organic matter and suspended solid could be removed. Therefore, it was possible to verify that zones could be separated into anoxic and aerobic and nitrification and denitrification process could be performed in a single reactor.

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“…Teknologi nanobubble menghasilkan gelembung halus mampu meningkatkan kadar oksigen terlarut lebih tinggi dibandingkan dengan gelembung yang berasal dari aerator biasa. Penggunaan nanobubble selama 4 jam dapat meningkatkan oksigen terlarut menjadi 42 mg/L pada suhu 20 °C, dalam waktu 24 jam oksigen terlarut bertahan pada konsentrasi 13,5 mg/L (Tekile et al, 2016). Tujuan penelitian adalah untuk mengetahui pengaruh penggunaan teknologi nanobubble terhadap perubahan kualitas air, tingkat stres dan kelangsungan hidup benih pasca transportasi.…”

Section: Pendahuluanunclassified

“…Perbedaan konsentrasi oksigen pada akhir transportasi tersebut disebabkan oleh konsentrasi oksigen terlarut pada awal transportasi yang berbeda antara nanobubble (29,10 mg/L) dengan oksigen murni (17,60 mg/L). Konsentrasi oksigen terlarut nanobubble pada awal transportasi sebesar 65,34% lebih tinggi dibandingkan oksigen murni, sesuai hasil penelitian menurut Tekile et al (2016), penggunaan nanobubble selama 4 jam akan dapat meningkatkan oksigen terlarut menjadi 42 mg/L pada suhu 20°C, dan dalam waktu 24 jam oksigen terlarut bertahan pada konsentrasi 13,5 mg/L. Ebina et al (2013), menyatakan bahwa nanobubble dapat meningkatkan level oksigen terlarut dari 7,7 mg/L menjadi 31,7 mg/L, dan Galang et al (2019), kadar oksigen terlarut dengan nanobubble sebesar 10,8 mg/L sedangkan aerator biasa hanya 4,65 mg/L.…”

Section: Kualitas Airunclassified

Pengaruh Penggunaan Nanobubble dalam Transportasi Udang Vaname (Litopenaeus vannamei)

Zaidy¹,

Anggoro²,

Kasmawijaya³

2022

jaki

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Pembenihan udang umumnya tidak berdekatan dengan lokasi pembesaran di tambak, untuk itu benih ditransportasi dalam waktu yang bervariasi dan terjadi penurunan kualitas air khususnya oksigen terlarut berakibat pada gangguan fisiologis dan kelangsungan hidup benih. Penggunaan teknologi nanobubble mampu meningkatkan dan mempertahankan kelarutan oksigen tetap tinggi selama transportasi. Tujuan dari penelitian ini untuk mengetahui penggunaan teknologi nanobubble terhadap perubahan kualitas air, tingkat stres dan kelangsungan hidup benih pada pengangkutan tertutup. Rancangan acang lengkap pola faktorial 2x2, faktor satu dengan 2 taraf yaitu nanobubble dan oksigen murni, faktor dua dengan 2 taraf yaitu durasi transportasi 24 dan 48 jam, masing-masing perlakuan dengan tiga ulangan. Hasil penelitian menunjukkan konsentrasi oksigen terlarut pada akhir transportasi pada nanobubble lebih tinggi dan berbeda nyata (P<0,05) dibandingkan dengan menggunakan oksigen murni, sedangkan konsentrasi karbon dioksida pada nanobubble lebih rendah dan berbeda nyata (P<0,05) dibandingkan dengan menggunakan oksigen murni. Konsentrasi total amonia nitrogen, amonia, nitrit, pH, suhu dan kadar glukosa darah relatif sama pada sumber oksigen dan durasi transportasi yang berbeda. Kelangsungan hidup benih pada akhir transportasi dan pasca pemeliharaan 7 hari, lebih tinggi dan berbeda nyata (P<0,05) yang menggunakan nanobubble dibandingkan dengan oksigen murni. Berdasarkan data penelitian tersebut teknologi nanobubble dapat dimanfaatkan untuk transportasi benih udang vaname sampai ke lokasi pembesaran dalam kondisi sehat dengan kelangsungan hidup yang tinggi.

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Extent and persistence of dissolved oxygen enhancement using nanobubbles

Cited by 28 publications

References 23 publications

Study of the Influence of Clays on the Transfer of Dissolved Oxygen in Water

Study of the Influence of Clays on the Transfer of Dissolved Oxygen in Water

Simultaneous nitrification and denitrification by using ejector type microbubble generator in a single reactor

Pengaruh Penggunaan Nanobubble dalam Transportasi Udang Vaname (Litopenaeus vannamei)

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