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Title: Recycled wastewater from anaerobic digestion of lipid extracted algae as a source of nutrients

Abstract

Nutrient supply, especially nitrogen and phosphorus, is one of the main obstacles limiting industrialization of algal biofuel. To help enhance nutrient utilization efficiency, our research focused on recycling of nutrients from lipid extracted algae biomass by the method of anaerobic digestion. Two methods of lipid extraction were performed, nutrients were released during anaerobic digestion of the lipid extracted biomass, the recycled nutrients were collected for algae cultivation, and the cycle was repeated: cultivation-extraction-digestion-cultivation. The findings reflect that anaerobic digestion released nitrogen and phosphorus, and released methane as a by-product. The algae grew well on the recycled nutrients. Ammonia is the limiting macro element, and extra trace elements enhanced algae production as well. Ash free dry weight, lipid content and lipid components were monitored and did not vary when the cycle was repeated. This system for recycling nutrients with supplementary nutrients holds potential for producing biofuel from algae.

Authors:
 [1];  [1]
  1. Univ. of Arizona, Tucson, AZ (United States)
Publication Date:
Research Org.:
Univ. of Arizona, Tucson, AZ (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Bioenergy Technologies Office (EE-3B)
OSTI Identifier:
1580752
Alternate Identifier(s):
OSTI ID: 1495547
Grant/Contract Number:  
EE0006269
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Fuel
Additional Journal Information:
Journal Volume: 210; Journal Issue: C; Journal ID: ISSN 0016-2361
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; Algal biofuel; Lipid extraction; Anaerobic digestion; Nutrients recycle

Citation Formats

Ogden, Kimberly, and Zhang, Bingcong. Recycled wastewater from anaerobic digestion of lipid extracted algae as a source of nutrients. United States: N. p., 2017. Web. doi:10.1016/j.fuel.2017.09.026.
Ogden, Kimberly, & Zhang, Bingcong. Recycled wastewater from anaerobic digestion of lipid extracted algae as a source of nutrients. United States. doi:10.1016/j.fuel.2017.09.026.
Ogden, Kimberly, and Zhang, Bingcong. Sat . "Recycled wastewater from anaerobic digestion of lipid extracted algae as a source of nutrients". United States. doi:10.1016/j.fuel.2017.09.026. https://www.osti.gov/servlets/purl/1580752.
@article{osti_1580752,
title = {Recycled wastewater from anaerobic digestion of lipid extracted algae as a source of nutrients},
author = {Ogden, Kimberly and Zhang, Bingcong},
abstractNote = {Nutrient supply, especially nitrogen and phosphorus, is one of the main obstacles limiting industrialization of algal biofuel. To help enhance nutrient utilization efficiency, our research focused on recycling of nutrients from lipid extracted algae biomass by the method of anaerobic digestion. Two methods of lipid extraction were performed, nutrients were released during anaerobic digestion of the lipid extracted biomass, the recycled nutrients were collected for algae cultivation, and the cycle was repeated: cultivation-extraction-digestion-cultivation. The findings reflect that anaerobic digestion released nitrogen and phosphorus, and released methane as a by-product. The algae grew well on the recycled nutrients. Ammonia is the limiting macro element, and extra trace elements enhanced algae production as well. Ash free dry weight, lipid content and lipid components were monitored and did not vary when the cycle was repeated. This system for recycling nutrients with supplementary nutrients holds potential for producing biofuel from algae.},
doi = {10.1016/j.fuel.2017.09.026},
journal = {Fuel},
issn = {0016-2361},
number = C,
volume = 210,
place = {United States},
year = {2017},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 4 works
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