Utilization Of Sweet Potato Starch Wastewater
For Biofertilizer Production By Bacillus
Amyloliquefaciens
Author(s)
C. Zhou, S. Xu, M. Zhang, Y. Chen X. Guan, S. Wu
& Z. Bai
Abstract
Effluents from the sweet potato starch industry possess a high load of Chemical
Oxygen Demand (COD) (10–35 g/l). The treatment of such wastewater by
conventional activated sludge processes consumes a lot of energy, resulting in
high treatment costs. A plant growth promoting bacterium (PGPB) Bacillus
amyloliquefaciens strain EBL11 was isolated from soil. The isolate EBL11
performed a good capacity of promoting tea plant growth, which indicated that
the strain can be used as a nonchemical alternative biofertilizer. In this study, we
investigated the carbon and nutrient rich industrial processing effluents of sweet
potato wastewater (SPW) as substrate for the cultivation of the biofertilizer strain
EBL11. The isolate EBL11 can grow well using SPW as the culture media. The
maximum yield of 8.7×109 CFU/ml of the isolate EBL11 was reached in 18 h at
32°C, pH 7.0 using the SPW as substrate. In conclusion, it is feasible to develop
a hybrid biotechnological process, integrating the production of environmental
friendly biofertilizer with treatment of intractable wastewater.
Keywords: Bacillus amyloliquefaciens, biofertilizer, plant growth promoting
bacteria, sweet potato starch wastewater, tea.
Keywords
Bacillus amyloliquefaciens, biofertilizer, plant growth promoting
bacteria, sweet potato starch wastewater, tea.
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