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HERO ID
2821316
Reference Type
Journal Article
Title
Growth optimisation of microalga mutant at high CO₂ concentration to purify undiluted anaerobic digestion effluent of swine manure
Author(s)
Cheng, J; Xu, J; Huang, Y; Li, Y; Zhou, J; Cen, K
Year
2015
Is Peer Reviewed?
Yes
Journal
Bioresource Technology
ISSN:
0960-8524
EISSN:
1873-2976
Volume
177
Page Numbers
240-246
Language
English
PMID
25496944
DOI
10.1016/j.biortech.2014.11.099
Web of Science Id
WOS:000346647100032
Abstract
Growth rate of the microalga Chlorella PY-ZU1 mutated by nuclear irradiation was optimised for use in the purification of undiluted anaerobic digestion effluent of swine manure (UADESM) with 3745 mg L(-1) chemical oxygen demand (COD) and 1135 mg L(-1) total nitrogen content. The problem of accessible carbon in UADESM was solved by continuous introduction of 15% (v/v) CO2. Adding phosphorus to UADESM and aeration of UADESM before inoculation both markedly reduced the lag phase of microalgal growth. In addition, the biomass yield and average growth rate of Chlorella PY-ZU1 increased significantly to 4.81 g L(-1) and 601.2 mg L(-1) d(-1), respectively, while the removal efficiencies of total phosphorus, COD and ammonia nitrogen increased to 95%, 79% and 73%, respectively. Thus, the findings indicate that Chlorella PY-ZU1 can be used for effective purification of UADESM, while the biomass can be safely used as animal feed supplement.
Keywords
Anaerobic digestion effluent; Pollutant removal; Microalgae; Nuclear irradiation; High CO2 concentration
Tags
IRIS
•
Ammonia, Oral - Problem Formulation
PubMed - 3/2015
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