Bioconversion of wastewater from sweet potato starch production to Paenibacillus polymyxa biofertilizer for tea plants

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dc.contributor.authorXu, S.
dc.contributor.authorBai, Z.
dc.contributor.authorJin, B.
dc.contributor.authorXiao, R.
dc.contributor.authorZhuang, G.
dc.date.issued2014
dc.description.abstractWastewater from the sweet potato starch industry is a large source of nutrient-rich substrates. We assessed whether this wastewater could be used to produce Paenibacillus polymyxa biofertilizer for foliar application to tea trees. Using the central composite design methods we experientially determined that the optimal culture conditions for P. polymyxa were pH, 6.5; temperature, 29.06C; and incubation time, 16 h. Under these conditions, a maximum biomass of 9.7 3 109 cfu/mL was achieved. We then conducted a yearlong field investigation to determine the effect of P. polymyxa biofertilizer on the growth of tea plants (Camellia sinensis). Tea yield, quantity of water extract, and tea polyphenol levels were significantly higher after foliar application of the biofertilizer compared to that in the controls by an average of 16.7%, 6.3%, and 10.4%, respectively. This approach appears to be technically feasible for organic tea production, and is an environmentally friendly way to utilize wastewater.
dc.description.statementofresponsibilityShengjun Xu, Zhihui Bai, Bo Jin3 Runlin Xiao & Guoqiang Zhuang
dc.identifier.citationScientific Reports, 2014; 4(1):4131-1-4131-7
dc.identifier.doi10.1038/srep04131
dc.identifier.issn2045-2322
dc.identifier.issn2045-2322
dc.identifier.urihttp://hdl.handle.net/2440/85610
dc.language.isoen
dc.publisherNature Group
dc.rights© This work is licensed under a Creative Commons Attribution- NonCommercial-ShareAlike 3.0 Unported license
dc.source.urihttps://doi.org/10.1038/srep04131
dc.subjectEnvironmental biotechnology; applied microbiology
dc.titleBioconversion of wastewater from sweet potato starch production to Paenibacillus polymyxa biofertilizer for tea plants
dc.typeJournal article
pubs.publication-statusPublished

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