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

Bingcong Zhang, Kimberly L Ogden

Research output: Contribution to journalArticle

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. The largest losses of nitrogen occurred in the extraction and cultivation steps.

Original languageEnglish (US)
Article number101434
JournalAlgal Research
Volume39
DOIs
StatePublished - May 1 2019

Fingerprint

algae
nitrogen balance
digestion
nitrogen
nutrients
anaerobic digestion

Keywords

  • Algal biofuel
  • Anaerobic digestion
  • Chlorella sorokiniana
  • Nitrogen recycle

ASJC Scopus subject areas

  • Agronomy and Crop Science

Cite this

Nitrogen balances and impacts on the algae cultivation-extraction-digestion-cultivation process. / Zhang, Bingcong; Ogden, Kimberly L.

In: Algal Research, Vol. 39, 101434, 01.05.2019.

Research output: Contribution to journalArticle

@article{e2d98dc53bad4ef28a540e204a2a4312,
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. The largest losses of nitrogen occurred in the extraction and cultivation steps.",
keywords = "Algal biofuel, Anaerobic digestion, Chlorella sorokiniana, Nitrogen recycle",
author = "Bingcong Zhang and Ogden, {Kimberly L}",
year = "2019",
month = "5",
day = "1",
doi = "10.1016/j.algal.2019.101434",
language = "English (US)",
volume = "39",
journal = "Algal Research",
issn = "2211-9264",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - Nitrogen balances and impacts on the algae cultivation-extraction-digestion-cultivation process

AU - Zhang, Bingcong

AU - Ogden, Kimberly L

PY - 2019/5/1

Y1 - 2019/5/1

N2 - 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. The largest losses of nitrogen occurred in the extraction and cultivation steps.

AB - 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. The largest losses of nitrogen occurred in the extraction and cultivation steps.

KW - Algal biofuel

KW - Anaerobic digestion

KW - Chlorella sorokiniana

KW - Nitrogen recycle

UR - http://www.scopus.com/inward/record.url?scp=85061554844&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85061554844&partnerID=8YFLogxK

U2 - 10.1016/j.algal.2019.101434

DO - 10.1016/j.algal.2019.101434

M3 - Article

AN - SCOPUS:85061554844

VL - 39

JO - Algal Research

JF - Algal Research

SN - 2211-9264

M1 - 101434

ER -