Energy and water use of a small-scale raft aquaponics system in Baltimore, Maryland, United States

David C Love, Michael S. Uhl, Laura Genello

Research output: Contribution to journalArticle

Abstract

Aquaponics is a form of aquaculture that integrates hydroponics to raise edible plants and fish. There is growing interest in aquaponics because it can be practiced in non-traditional locations for agriculture such as inside warehouses and on marginal lands, and it can provide locally grown products without using synthetic pesticides, chemical fertilizers, or antibiotics. Yet questions remain about the ecological and economic sustainability of aquaponics. The objective of this study was to describe the operating conditions, inputs (energy, water, and fish feed) and outputs (edible crops and fish) and their relationship over two years for a small-scale raft aquaponics operation in Baltimore, Maryland, United States. The system had roughly 1% water loss per day and used an average of 35,950 L for replenishment per year. Predicted values suggest rainfall could completely replace the existing water needs. The average energy use was 19,526 kWh for propane and electricity per year at a cost of $2055 US dollars. The largest uses of electricity were in-tank water heaters. Comparing inputs to outputs, 104 L of water, 0.5 kg feed, and 56 kWh energy ($6 in energy costs) were needed to produce 1 kg of crops; and 292 L of water, 1.3 kg feed, and 159. kWh of energy ($12 in energy costs) were needed to produce a 1 kg increase in tilapia. Raising tilapia was a net loss, while raising crops was a net gain when comparing market prices to energy costs. Understanding energy, water, and feed use in aquaponic systems is essential to inform farm business plans. These data can serve as a point of comparison to other small-scale aquaponic systems, and inform future work on life cycle assessments of aquaponics.

Original languageEnglish (US)
Pages (from-to)19-27
Number of pages9
JournalAquacultural Engineering
Volume68
DOIs
StatePublished - Sep 1 2015

Fingerprint

aquaponics
energy use
water use
energy
energy costs
water
tilapia (common name)
electricity
cost
crop
crops
fish
business planning
economic sustainability
heaters
propane
life cycle assessment
environmental sustainability
market prices
hydroponics

Keywords

  • Aquaculture
  • Aquaponic raft culture
  • Aquaponics
  • Recirculating aquaculture
  • Tilapia

ASJC Scopus subject areas

  • Aquatic Science

Cite this

Energy and water use of a small-scale raft aquaponics system in Baltimore, Maryland, United States. / Love, David C; Uhl, Michael S.; Genello, Laura.

In: Aquacultural Engineering, Vol. 68, 01.09.2015, p. 19-27.

Research output: Contribution to journalArticle

@article{629be79238934bc2a5324e29dbed6199,
title = "Energy and water use of a small-scale raft aquaponics system in Baltimore, Maryland, United States",
abstract = "Aquaponics is a form of aquaculture that integrates hydroponics to raise edible plants and fish. There is growing interest in aquaponics because it can be practiced in non-traditional locations for agriculture such as inside warehouses and on marginal lands, and it can provide locally grown products without using synthetic pesticides, chemical fertilizers, or antibiotics. Yet questions remain about the ecological and economic sustainability of aquaponics. The objective of this study was to describe the operating conditions, inputs (energy, water, and fish feed) and outputs (edible crops and fish) and their relationship over two years for a small-scale raft aquaponics operation in Baltimore, Maryland, United States. The system had roughly 1{\%} water loss per day and used an average of 35,950 L for replenishment per year. Predicted values suggest rainfall could completely replace the existing water needs. The average energy use was 19,526 kWh for propane and electricity per year at a cost of $2055 US dollars. The largest uses of electricity were in-tank water heaters. Comparing inputs to outputs, 104 L of water, 0.5 kg feed, and 56 kWh energy ($6 in energy costs) were needed to produce 1 kg of crops; and 292 L of water, 1.3 kg feed, and 159. kWh of energy ($12 in energy costs) were needed to produce a 1 kg increase in tilapia. Raising tilapia was a net loss, while raising crops was a net gain when comparing market prices to energy costs. Understanding energy, water, and feed use in aquaponic systems is essential to inform farm business plans. These data can serve as a point of comparison to other small-scale aquaponic systems, and inform future work on life cycle assessments of aquaponics.",
keywords = "Aquaculture, Aquaponic raft culture, Aquaponics, Recirculating aquaculture, Tilapia",
author = "Love, {David C} and Uhl, {Michael S.} and Laura Genello",
year = "2015",
month = "9",
day = "1",
doi = "10.1016/j.aquaeng.2015.07.003",
language = "English (US)",
volume = "68",
pages = "19--27",
journal = "Aquacultural Engineering",
issn = "0144-8609",
publisher = "Elsevier",

}

TY - JOUR

T1 - Energy and water use of a small-scale raft aquaponics system in Baltimore, Maryland, United States

AU - Love, David C

AU - Uhl, Michael S.

AU - Genello, Laura

PY - 2015/9/1

Y1 - 2015/9/1

N2 - Aquaponics is a form of aquaculture that integrates hydroponics to raise edible plants and fish. There is growing interest in aquaponics because it can be practiced in non-traditional locations for agriculture such as inside warehouses and on marginal lands, and it can provide locally grown products without using synthetic pesticides, chemical fertilizers, or antibiotics. Yet questions remain about the ecological and economic sustainability of aquaponics. The objective of this study was to describe the operating conditions, inputs (energy, water, and fish feed) and outputs (edible crops and fish) and their relationship over two years for a small-scale raft aquaponics operation in Baltimore, Maryland, United States. The system had roughly 1% water loss per day and used an average of 35,950 L for replenishment per year. Predicted values suggest rainfall could completely replace the existing water needs. The average energy use was 19,526 kWh for propane and electricity per year at a cost of $2055 US dollars. The largest uses of electricity were in-tank water heaters. Comparing inputs to outputs, 104 L of water, 0.5 kg feed, and 56 kWh energy ($6 in energy costs) were needed to produce 1 kg of crops; and 292 L of water, 1.3 kg feed, and 159. kWh of energy ($12 in energy costs) were needed to produce a 1 kg increase in tilapia. Raising tilapia was a net loss, while raising crops was a net gain when comparing market prices to energy costs. Understanding energy, water, and feed use in aquaponic systems is essential to inform farm business plans. These data can serve as a point of comparison to other small-scale aquaponic systems, and inform future work on life cycle assessments of aquaponics.

AB - Aquaponics is a form of aquaculture that integrates hydroponics to raise edible plants and fish. There is growing interest in aquaponics because it can be practiced in non-traditional locations for agriculture such as inside warehouses and on marginal lands, and it can provide locally grown products without using synthetic pesticides, chemical fertilizers, or antibiotics. Yet questions remain about the ecological and economic sustainability of aquaponics. The objective of this study was to describe the operating conditions, inputs (energy, water, and fish feed) and outputs (edible crops and fish) and their relationship over two years for a small-scale raft aquaponics operation in Baltimore, Maryland, United States. The system had roughly 1% water loss per day and used an average of 35,950 L for replenishment per year. Predicted values suggest rainfall could completely replace the existing water needs. The average energy use was 19,526 kWh for propane and electricity per year at a cost of $2055 US dollars. The largest uses of electricity were in-tank water heaters. Comparing inputs to outputs, 104 L of water, 0.5 kg feed, and 56 kWh energy ($6 in energy costs) were needed to produce 1 kg of crops; and 292 L of water, 1.3 kg feed, and 159. kWh of energy ($12 in energy costs) were needed to produce a 1 kg increase in tilapia. Raising tilapia was a net loss, while raising crops was a net gain when comparing market prices to energy costs. Understanding energy, water, and feed use in aquaponic systems is essential to inform farm business plans. These data can serve as a point of comparison to other small-scale aquaponic systems, and inform future work on life cycle assessments of aquaponics.

KW - Aquaculture

KW - Aquaponic raft culture

KW - Aquaponics

KW - Recirculating aquaculture

KW - Tilapia

UR - http://www.scopus.com/inward/record.url?scp=84938936907&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84938936907&partnerID=8YFLogxK

U2 - 10.1016/j.aquaeng.2015.07.003

DO - 10.1016/j.aquaeng.2015.07.003

M3 - Article

AN - SCOPUS:84938936907

VL - 68

SP - 19

EP - 27

JO - Aquacultural Engineering

JF - Aquacultural Engineering

SN - 0144-8609

ER -