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Bioresour Technol. 2018 Sep;264:387-390. doi: 10.1016/j.biortech.2018.06.097. Epub 2018 Jun 28.

Enhanced electron transfer mediator based on biochar from microalgal sludge for application to bioelectrochemical systems.

Author information

1
Department of Chemical and Biological Engineering, Korea University, 145, Anam-Ro, Seongbuk-Gu, Seoul 136-701, Republic of Korea.
2
Department of Interdisciplinary Bio-Micro System Technology, College of Engineering, Korea University, 145, Anam-Ro, Seongbuk-Gu, Seoul 136-701, Republic of Korea.
3
Department of Biotechnology, Sangmyung University, 20, Hongjimun 2-Gil, Jongno-Gu, Seoul 03016, Republic of Korea.
4
Department of Biotechnology, Korea University, 145, Anam-Ro, Seongbuk-Gu, Seoul 136-701, Republic of Korea.
5
Department of Plant and Food Sciences, Sangmyung University, 31 Sangmyungdae-Gil, Dongnam-Gu, Cheonan, Chungnam 31066, Republic of Korea.
6
Department of Chemical Engineering, Kwangwoon University, 20 Kwangwoon-Ro, Nowon-Gu, Seoul 139-701, Republic of Korea.
7
Department of Chemical and Biological Engineering, Korea University, 145, Anam-Ro, Seongbuk-Gu, Seoul 136-701, Republic of Korea. Electronic address: kimsw@korea.ac.kr.

Abstract

This study is focused on the utilization of waste microalgal sludge (MS) from microalgal extraction and its potential as an electrode material. The MS was activated under N2 at high temperature for conversion to biochar (MSB). In addition, cobalt (Co; metal hydroxide) and chitosan were used as a mediator for electron transfer by immobilization on MSB (MSB/Co/chitosan). Through analysis of the surface and components of the MSB/Co/chitosan, it was shown that Co and chitosan were properly synthesized with MSB. The enzymatic fuel cell (EFC) system successfully obtained a power density of 3.1 mW cm-2 and a current density of 9.7 mA cm-2. In addition, the glucose biosensors applied with the developed electron transfer mediator showed a sensitivity of 0.488 mA mM-1 cm-2.

KEYWORDS:

Biochar; Biosensor; Enzymatic fuel cell; Mediator; Microalgal sludge

PMID:
30041774
DOI:
10.1016/j.biortech.2018.06.097
[Indexed for MEDLINE]

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