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Title: Nitrogen balances and impacts on the algae cultivation-extraction-digestion-cultivation process

Abstract

Anaerobic digestion of lipid extracted algae is a method for recycling nutrients to a cultivation system. Growth of algae on recycled nitrogen from these systems has been demonstrated. This study focuses on how the initial nitrogen concentration impacts each stage of an integrated cultivation-extraction-digestion-cultivation process; and how the nitrogen is distributed in each step. The entire process was performed at five different initial nitrogen concentrations, ranging from nutrient deplete to excess. Algae production and lipid content were measured to evaluate the impact of initial nitrogen concentration. A thorough nitrogen mass balance for every step of the process was completed. The results show that initial nitrogen concentration had significant impacts on the whole process. The nitrogen recoveries through the nutrient recycle process were all approximately 65% regardless of initial nitrogen concentration. All nitrogen balances closed within experimental error. As a result, the largest losses of nitrogen occurred in the extraction and cultivation steps.

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:
1580751
Alternate Identifier(s):
OSTI ID: 1547748
Grant/Contract Number:  
EE0006269
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Algal Research
Additional Journal Information:
Journal Volume: 39; Journal Issue: C; Journal ID: ISSN 2211-9264
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; Algal biofuel; Nitrogen recycle; Anaerobic digestion; Chlorella sorokiniana

Citation Formats

Ogden, Kimberly, and Zhang, Bingcong. Nitrogen balances and impacts on the algae cultivation-extraction-digestion-cultivation process. United States: N. p., 2019. Web. doi:10.1016/j.algal.2019.101434.
Ogden, Kimberly, & Zhang, Bingcong. Nitrogen balances and impacts on the algae cultivation-extraction-digestion-cultivation process. United States. doi:10.1016/j.algal.2019.101434.
Ogden, Kimberly, and Zhang, Bingcong. Fri . "Nitrogen balances and impacts on the algae cultivation-extraction-digestion-cultivation process". United States. doi:10.1016/j.algal.2019.101434. https://www.osti.gov/servlets/purl/1580751.
@article{osti_1580751,
title = {Nitrogen balances and impacts on the algae cultivation-extraction-digestion-cultivation process},
author = {Ogden, Kimberly and Zhang, Bingcong},
abstractNote = {Anaerobic digestion of lipid extracted algae is a method for recycling nutrients to a cultivation system. Growth of algae on recycled nitrogen from these systems has been demonstrated. This study focuses on how the initial nitrogen concentration impacts each stage of an integrated cultivation-extraction-digestion-cultivation process; and how the nitrogen is distributed in each step. The entire process was performed at five different initial nitrogen concentrations, ranging from nutrient deplete to excess. Algae production and lipid content were measured to evaluate the impact of initial nitrogen concentration. A thorough nitrogen mass balance for every step of the process was completed. The results show that initial nitrogen concentration had significant impacts on the whole process. The nitrogen recoveries through the nutrient recycle process were all approximately 65% regardless of initial nitrogen concentration. All nitrogen balances closed within experimental error. As a result, the largest losses of nitrogen occurred in the extraction and cultivation steps.},
doi = {10.1016/j.algal.2019.101434},
journal = {Algal Research},
issn = {2211-9264},
number = C,
volume = 39,
place = {United States},
year = {2019},
month = {2}
}

Journal Article:
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