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Enhancement of anaerobic digestion of biodegradable polymer (Cigarette butts) for methane production

Title
Enhancement of anaerobic digestion of biodegradable polymer (Cigarette butts) for methane production
Author
달사브라바하란
Alternative Author(s)
달사브라바하란
Advisor(s)
Byoung-In SANG
Issue Date
2021. 2
Publisher
Hanyang University
Degree
Master
Abstract
Yearly enormous volume of cigarette butts is being disposed in the environment with the residues of harmful chemicals like nicotine and acetone. The three major components of cigarettes are filter, paper and leaves. The discarded cigarette butts are usually filters with the small portion of burnt leaves and papers. Despite being biodegradable polymer, the slow degradation rate of the filters aids them to leach out the harmful substances in the soil and water environment. Degradation of the organic materials of the cigarettes under anaerobic digestion were attempted in this study to enhance biomethanation and waste decomposition rate. Due to the presence of high carbon atoms, cigarette butts can act as a potential carbon source for increasing the biomethanation rate. In this study, two major types of pretreatment (thermal and thermal alkaline) were evaluated for improved methane fermentation and reduced hydrolysis rate. In addition to the above stated thermal alkaline pretreatment method, thermal alkaline double wash pretreatment method was investigated in respect to the effects of NaCl removal and double washing steps. Among the three pretreated condition, thermal alkaline double wash has predominantly enhanced the methane and volatile fatty acid production rate. Under thermal alkaline double wash pretreated condition, the degradation pattern of filter, paper and leaves were tested in both high and low substrate loading. The degradation hierarchy in both the substrate loading rate showed entirely different pattern. Filter showed rapid hydrolysis and enhanced methane production in low substrate loading (5 g /L) but failed in to enhance the methane production rate in high loading substrate (25 g/L).
URI
https://repository.hanyang.ac.kr/handle/20.500.11754/158982http://hanyang.dcollection.net/common/orgView/200000485513
Appears in Collections:
GRADUATE SCHOOL[S](대학원) > CHEMICAL ENGINEERING(화학공학과) > Theses (Master)
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