Please use this identifier to cite or link to this item: http://hdl.handle.net/10321/2957
Title: An innovative electrochemical process to alleviate the challenges for harvesting of small size microalgae by using non-sacrificial carbon electrodes
Authors: Guldhe, Abhishek 
Misra, Rohit 
Singh, Poonam 
Rawat, Ismail 
Bux, Faizal 
Keywords: Microalgae;Electrochemical harvesting;A. falcatus;Non-sacrificial electrodes;Flocculation
Issue Date: 4-Sep-2015
Publisher: Elsevier
Source: Guldhe, A. et al. 2015. An innovative electrochemical process to alleviate the challenges for harvesting of small size microalgae by using non-sacrificial carbon electrodes. Algal Research. 19: 292-298.
Abstract: Harvesting of microalgal biomass is still a bottleneck to its commercial scale application, due to small cell size, low culture densities, colloidal stability and thus unfavourable economics. Centrifugation is an efficient technique but the high energy consumption makes it unsuitable for low value microalgal products. Chemical flocculation and filtration are inefficient and time consuming methods for harvesting of small size microalgae. In this study, an electrochemical harvesting (ECH) process was assessed for the harvesting of a small size microalga Ankistrodesmus falcatus by using non-sacrificial carbon electrodes. Harvesting efficiency of ECH was compared to centrifugation and flocculation using alum and chitosan. The highest recovery efficiency was obtained by cen-trifugation (93% after 15 min) followed by ECH process (91% after 30 min), alum (86% after 60 min) and chitosan (55% after 60 min). However, the energy consumption of ECH process (1.76 kWh kg−1) was much lower than the centrifugation process (65.34 kWh kg−1). The biochemical composition of harvested biomass was also assessed, and it was found that the ECH process has no deteriorating effect on the quality of biomass. High recovery effi-ciency, low energy consumption and the use of non-sacrificial electrodes make ECH a sustainable harvesting technique for small size microalgae.
URI: http://hdl.handle.net/10321/2957
Appears in Collections:Research Publications (Water and Wastewater Technology)

Files in This Item:
File Description SizeFormat 
Guldhe_AR_Vol19_Pg292-298_2015.pdf778.9 kBAdobe PDFThumbnail
View/Open
Show full item record

Page view(s)

36
checked on Jul 20, 2018

Download(s)

9
checked on Jul 20, 2018

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.