Journal
ECOLOGICAL ENGINEERING
Volume 71, Issue -, Pages 355-362Publisher
ELSEVIER
DOI: 10.1016/j.ecoleng.2014.07.002
Keywords
Paenibacillus sp strain LD-1 (JX499920); Pulp and paper mill effluent; Bioremediation; GC-MS; Toxicity test
Funding
- CSIR TASK FORCE project INDEPTH [BSC0111]
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The present study deals with the bioremediation of potentially hazardous pulp and paper mill effluent by a laccase producing Paenibacillus sp. strain LD-1 (JX499920) isolated from contaminated soil sample by lignin enrichment method. The bacterium effectively reduced pollution parameters (colour 68%, lignin 54%, phenol 86%, BOD 83% and COD 78%) after 144 h of treatment at 34 +/- 1 degrees C and 120 rpm. GC-MS analysis of control and treated samples showed that concentration of most of the low molecular weight phenolic compounds like 2-methoxyphenol, 2,6-dimethoxy phenol, 2-methoxy-4-ethyl-phenol, 3-allyl-6-methoxyphenol, ethanone 1-(-4-hydroxy-3,5-dimethoxyphenyl), benzoic acid, 2-methoxy-4-(1-propenyl) phenol and 4-methoxycinnamic acid present in control untreated effluent were reduced after bacterial treatment. The toxicity assessments were carried out with treated and untreated effluent by studying the growth and germination of seeds of mung bean (Vigna radiata L.). The mung bean bioassay confirmed the detoxification of effluent after bacterial treatment. (C) 2014 Elsevier B.V. All rights reserved.
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