A novel self-buffering membrane distillation-based thermophilic anaerobic bioreactor

The stability of an anaerobic bioreactor is a function of alkalinity that provides buffer capacity to maintain a suitable pH for anaerobic microorganisms. The greatest advantage of membrane distillation (MD) is the high rejection of most solutes, including alkaline salt, and it has a high potential...

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Những tác giả chính:	Duong, Chinh Cong, Chen, Shiao-Shing, Le, Huy Quang, Chang, Hau-Ming, Nguyen Cong Nguyen, Cao, Dan Thanh Ngoc
Định dạng:	Journal article
Ngôn ngữ:	English
Được phát hành:	2023
Những chủ đề:	Alkalinity; Membrane distillation; Self-buffering; Thermophilic anaerobic bioreactor
Truy cập trực tuyến:	https://scholar.dlu.edu.vn/handle/123456789/2988 https://www.sciencedirect.com/science/article/pii/S2352186420313778
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spelling	oai:scholar.dlu.edu.vn:123456789-29882023-09-28T03:15:13Z A novel self-buffering membrane distillation-based thermophilic anaerobic bioreactor Duong, Chinh Cong Chen, Shiao-Shing Le, Huy Quang Chang, Hau-Ming Nguyen Cong Nguyen Cao, Dan Thanh Ngoc Alkalinity; Membrane distillation; Self-buffering; Thermophilic anaerobic bioreactor The stability of an anaerobic bioreactor is a function of alkalinity that provides buffer capacity to maintain a suitable pH for anaerobic microorganisms. The greatest advantage of membrane distillation (MD) is the high rejection of most solutes, including alkaline salt, and it has a high potential to retain alkalinity for the anaerobic system. For the first time, a thermophilic anaerobic granular bioreactor integrated with an MD membrane to maintain the buffered pH was studied in an anaerobic bioreactor without alkalinity supplement. This study presented a comparison between a conventional thermophilic anaerobic bioreactor (TAn1) and a thermophilic anaerobic bioreactor integrated with a MD (TAn2-MD). The two TAns (TAn1 and TAn2) were operated in the same conditions except there was no alkalinity feeding for the TAn2-MD. The results showed that the pH in the TAn2-MD unit was always higher than 6.8 with the organic loading rates from 6 to 18 kg COD/m3/day. However, to maintain the pH of the TAn1 unit at the same level as the TAn2-MD unit, the minimum alkalinity requirements for TAn1 were 1.5, 1.56, 1.62, and 1.8 g/L as CaCO3 at an organic loading rate of 6, 10, 14, and 18 kg COD/m3/day, respectively. Although there was no alkalinity supplement for the TAn2-MD system, two stability indexes, FOS/TAC (volatile organic acids to buffer capacity) and IA/PA (intermediate alkalinity to partial alkalinity), indicated the system was operated at a stable condition. In summary, the designed TAn2-MD can accomplish high-efficiency organic carbon removal (higher than 99.4%) without alkalinity supplement, achieve zero-liquid-discharge, and reclaim high-quality wastewater in one step. 2023-09-28T03:15:09Z 2023-09-28T03:15:09Z 2020 Journal article Bài báo đăng trên tạp chí thuộc ISI, bao gồm book chapter 2352-1864 https://scholar.dlu.edu.vn/handle/123456789/2988 10.1016/j.eti.2020.101077 https://www.sciencedirect.com/science/article/pii/S2352186420313778 en
institution	Thư viện Trường Đại học Đà Lạt
collection	Thư viện số
language	English
topic	Alkalinity; Membrane distillation; Self-buffering; Thermophilic anaerobic bioreactor
spellingShingle	Alkalinity; Membrane distillation; Self-buffering; Thermophilic anaerobic bioreactor Duong, Chinh Cong Chen, Shiao-Shing Le, Huy Quang Chang, Hau-Ming Nguyen Cong Nguyen Cao, Dan Thanh Ngoc A novel self-buffering membrane distillation-based thermophilic anaerobic bioreactor
description	The stability of an anaerobic bioreactor is a function of alkalinity that provides buffer capacity to maintain a suitable pH for anaerobic microorganisms. The greatest advantage of membrane distillation (MD) is the high rejection of most solutes, including alkaline salt, and it has a high potential to retain alkalinity for the anaerobic system. For the first time, a thermophilic anaerobic granular bioreactor integrated with an MD membrane to maintain the buffered pH was studied in an anaerobic bioreactor without alkalinity supplement. This study presented a comparison between a conventional thermophilic anaerobic bioreactor (TAn1) and a thermophilic anaerobic bioreactor integrated with a MD (TAn2-MD). The two TAns (TAn1 and TAn2) were operated in the same conditions except there was no alkalinity feeding for the TAn2-MD. The results showed that the pH in the TAn2-MD unit was always higher than 6.8 with the organic loading rates from 6 to 18 kg COD/m3/day. However, to maintain the pH of the TAn1 unit at the same level as the TAn2-MD unit, the minimum alkalinity requirements for TAn1 were 1.5, 1.56, 1.62, and 1.8 g/L as CaCO3 at an organic loading rate of 6, 10, 14, and 18 kg COD/m3/day, respectively. Although there was no alkalinity supplement for the TAn2-MD system, two stability indexes, FOS/TAC (volatile organic acids to buffer capacity) and IA/PA (intermediate alkalinity to partial alkalinity), indicated the system was operated at a stable condition. In summary, the designed TAn2-MD can accomplish high-efficiency organic carbon removal (higher than 99.4%) without alkalinity supplement, achieve zero-liquid-discharge, and reclaim high-quality wastewater in one step.
format	Journal article
author	Duong, Chinh Cong Chen, Shiao-Shing Le, Huy Quang Chang, Hau-Ming Nguyen Cong Nguyen Cao, Dan Thanh Ngoc
author_facet	Duong, Chinh Cong Chen, Shiao-Shing Le, Huy Quang Chang, Hau-Ming Nguyen Cong Nguyen Cao, Dan Thanh Ngoc
author_sort	Duong, Chinh Cong
title	A novel self-buffering membrane distillation-based thermophilic anaerobic bioreactor
title_short	A novel self-buffering membrane distillation-based thermophilic anaerobic bioreactor
title_full	A novel self-buffering membrane distillation-based thermophilic anaerobic bioreactor
title_fullStr	A novel self-buffering membrane distillation-based thermophilic anaerobic bioreactor
title_full_unstemmed	A novel self-buffering membrane distillation-based thermophilic anaerobic bioreactor
title_sort	novel self-buffering membrane distillation-based thermophilic anaerobic bioreactor
publishDate	2023
url	https://scholar.dlu.edu.vn/handle/123456789/2988 https://www.sciencedirect.com/science/article/pii/S2352186420313778
_version_	1778792469037580288

A novel self-buffering membrane distillation-based thermophilic anaerobic bioreactor

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