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A novel non-starch based cationic polymer as flocculant for harvesting microalgae

Author:
Kumar, Niwas, Banerjee, Chiranjib, Kumar, Niraj, Jagadevan, Sheeja
Source:
Bioresource technology 2019 v.271 pp. 383-390
ISSN:
0960-8524
Subject:
Chlorella, Micractinium, Scenedesmus, biopolymers, flocculants, flocculation, harvesting, locust bean gum, microalgae, quaternary ammonium compounds
Abstract:
This work intends towards the preparation of different grades of cationic locust bean gum biopolymer (CLBG) through the incorporation of 2,3-epoxypropyltrimethylammonium chloride (GTMAC) on to the pristine locust bean gum (LBG) biopolymer. Among them the best grade was further selected, characterized and their flocculation efficacy was evaluated towards harvesting of three different indigenous isolated green microalgae viz. Chlorella sp. NCQ, Micractinium sp. NCS2 and Scenedesmus sp. CBIIT(ISM). Flocculation efficiency of 96.68%, 96.64%, and 97.42% were obtained for Chlorella sp. NCQ, Micractinium sp. NCS2 and Scenedesmus sp. CBIIT(ISM) at an optimum dosage of 55, 40, and 30 ppm respectively. Thus CLBG was proven to be an efficient flocculant towards harvesting of green microalgae than its natural form.
Agid:
6147517