Investigation of the influence of hydraulic retention time on acidogenesis in aerobic treatment
Başlık çevirisi mevcut değil.
- Tez No: 364529
- Danışmanlar: PROF. DR. ORHAN YENİGÜN
- Tez Türü: Yüksek Lisans
- Konular: Çevre Mühendisliği, Environmental Engineering
- Anahtar Kelimeler: Belirtilmemiş.
- Yıl: 1996
- Dil: İngilizce
- Üniversite: Boğaziçi Üniversitesi
- Enstitü: Çevre Bilimleri Enstitüsü
- Ana Bilim Dalı: Çevre Teknolojileri Ana Bilim Dalı
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: 101
Özet
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Özet (Çeviri)
Anaerobic processes are one of the most important biological waste treatment processes. In recent years, interests in anaerobic treatment has expanded considerably because the methane by product can serve as a useful fuel to help offset a growing demand for energy. Unfortunately, this and other attributes have been clouded by certain drawbacks, such as prolonged periods required for start-up and the process instability, which results in the failure of operating digesters. In order to increase the stability of anaerobic digestion, two-phase anaerobic systems have been introduced. The aim of this study is to investigate the influence of hydraulic retention time on the conversion of the substrate to volatile acids and on the composition of the reactor effluent. The experimental work comprised two major parts; the acclimation of obtained acidogenic sludge to glucose in four steps (these were 5000, 10000, 15000 and 20000 mg COD/L) and investigation ofthe influence of hydraulic retention time (HR.T). It was found that HR.T has an impact on the conversion of the substrate to volatile acids and on the composition of the reactor effiuent. In HRT= 4 days, main products of the reactJrs were acetic (HAc), propionic (BPr), butyric(HBu) and valeric (HVal) acids; where as in HRT=10 days, main products of the reactors were BPr, HVal, HBu and HAc. Moreover, in HRT= 4 days; percentage of acidification and VF As: Alkalinity were in the proper range; 6% for A reactor, 11% for B reactor and 0.85 for A reactor, 0.56 for B reactor, respectively. In contrast to 4 days HRT, in HRT= 10 days, above values were respectively, 1% for A reactor, 1% for B reactor and 0.28 fur A reactor, 0.28 for B reactor.These data presented failure of the process. Therefore, in comparison to 10 days hydraulic retention time, 4 days HR.T was better for lab-scale semi continuous reactors which were used glucose as carbon source.
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