Treatment of Hydroponics Wastewater Using Constructed Wetlands in Winter Conditions

Gagnon, Vincent; Maltais‐Landry, Gabriel; Puigagut, Jaume; Chazarenc, Florent; Brisson, Jacques

doi:10.1007/s11270-010-0362-8

Cited by 74 publications

(61 citation statements)

References 24 publications

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“…Brady et al (1999) highlighted that nitrate leaching from agricultural activities could also cause several environmental problems including the loss of calcium and other cations as well as moving into surface or groundwater where it can severely impact the quality of drinking water. Environmental pollution from hydroponics in terms of nutrients has also been reported by Fernandez (2009) and Gagnon et al (2010). These facts have been supported by a survey carried out during the initial phase of the study whereby it has been found that 300-400 litres of drain out solution (hydroponic effluents) were lost per day from one greenhouse with nitrate values exceeding 50 mg/L (EPA, 1991).…”

Section: Discussionmentioning

confidence: 62%

“…Thus possibly requiring regulatory measures to be put in place to control the discharge of effluents and mitigate the environmental impacts. Given limited information of the impact of hydroponics effluents, this study focussed [6][7]2017 mainly on a survey conducted around the island to assess hydroponics growers' awareness of the environmental impact associated with the effluents. During the study the area under hydroponics production was around 25 hectares.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Hydroponics Effluents: A Potential Threat To The Environment

2017

ICDET-17, FABMS-17, RIECAE-17, RTET-17, ABMS-17 Feb. 2017

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Section: Discussionmentioning

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Hydroponics Effluents: A Potential Threat To The Environment

2017

ICDET-17, FABMS-17, RIECAE-17, RTET-17, ABMS-17 Feb. 2017

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“…It was reported that removal efficiencies for NO À 3 -N and NO À 2 -N increased with C/N ratio [8,20,35]. A significant effect of carbon addition on the nitrate removal was informed for the treatment of nitrate-contaminated wastewater using CWs [8,36,37]. Gagnon et al [37] reported that mean nitrate removal efficiency was just 7% in HSSF CW mesocosms treating hydroponics wastewater without carbon addition, but achieved about 70% in those with sucrose addition at a COD/NO À 3 -N ratio of 3.5:1.…”

Section: Insufficient Carbon Sourcementioning

confidence: 99%

“…A significant effect of carbon addition on the nitrate removal was informed for the treatment of nitrate-contaminated wastewater using CWs [8,36,37]. Gagnon et al [37] reported that mean nitrate removal efficiency was just 7% in HSSF CW mesocosms treating hydroponics wastewater without carbon addition, but achieved about 70% in those with sucrose addition at a COD/NO À 3 -N ratio of 3.5:1. Ingersoll and Baker [20] reported that nearly complete nitrate removal could be achieved at a critical C/NO À 3 -N of around 5:1 in FWS CW microcosms treating nitrate-contaminated wastewater.…”

Section: Insufficient Carbon Sourcementioning

confidence: 99%

Nitrate removal from tail water by integrated vertical-flow constructed wetlands at a high hydraulic loading rate

Chang¹,

Wu²,

Dai³

et al. 2013

Desalination and Water Treatment

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A B S T R A C TNitrate removal rates of two pilot-scale integrated vertical-flow constructed wetlands (IVCWs) treating tail water, under a hydraulic loading rate (HLR) of 250 mm/d with a mean influent NO À 3 -N concentration of 24.4 mg·L À1 , were evaluated. Mean NO À 3 -N removal efficiencies of 15.5 and 18.5% with mass removal rates of 1.01 g·m À2 ·d À1 and 1.16 g·m À2 ·d À1 for IVCW 1 (planted with Canna indica and Pontederia cordata) and 2 (planted with Typha orientalis and Arundo donax var. versicolor), respectively, were achieved. The removal rate constants as fitted by the first-order area-based model averaged 0.046 and 0.055 m·d À1 , respectively. Since NO À 3 -N was the dominant nitrogen form in the effluent, denitrification was the limiting step in nitrogen removal despite of favorable pH and anaerobic conditions in the wetland beds. Low availability of carbon source, high HLR, and low temperature could be the probable influencing factors for the observed low NO À 3 -N removal efficiencies. However, IVCW could be used to treat tail water for nitrate removal at a comparable high loading rate.

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“…High yield hydroponic systems require a considerable amount of macro-and micronutrients from industrial and mining origin, leading to high energy (i.e., for production and transport) and finite resources use (e.g., phosphorus and oil) . Also, in no-recirculating systems, intermittent disposal of the considerable amounts of nutrient rich water leads to high water consumption as well as surface and groundwater pollution (Gagnon et al, 2010). The regular exchange of water performed in conventional aquacultural systems is not necessary in aquaponics.…”

Section: Thesis Outlinementioning

confidence: 99%

Opportunities and Challenges of Multi-Loop Aquaponic Systems

Goddek

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v Preface Which of us is not familiar with this situation during the student time: on a Wednesday night, one wants to go out to grab a beer ("just one Duveltje") with friends. Until the end of the night (and several beers later) one was trapped in several discussions about religion, politics, and one's field of study. I have to admit, that I have been involved in plenty of such discussions, which also stems from the fact that I am a very discussion-friendly and curious person. However, I caught myself often saying the same sentence "well, the idea is great, but it actually does not really work as it should" with respect to two topics: Aquaponics and Communism. This might appear to be a somewhat far-fetched statement, however, for those who have neither read Marx nor followed the development of aquaponics the last 30 years: in a nutshell it can be stated that both of these ideas follow bottom-up (i.e. local and circular) approaches (i.e. for small farmers and individuals).Additionally to the above, I honestly believe that in times of the financial crisis -in which multinational corporations such as [think of big corporations that produce GMO seeds that are immune to their pesticides] increase their quasi-monopoly positions on the global food market -a paradigm shift back to human-centred and sustainable agricultural development is required to ensure both (1) healthy (i.e. pesticide free) diets and (2) food independence. In contrast, organic, fair trade, and GMO-free food have recently gained rapidly increasing popularity. Consumers want transparent and extensive information about the origin and manufacture of the foodstuffs they buy. The development of agriculture and how to use (finite) resources efficiently will be crucial with respect to the global development and the future of the earth in general. Right now, we are at a crossroads in our history that will determine whether either the people or the corporations will be empowered. I intended to provocatively illustrate this new class conflict on the book cover with the objective to polarize and thus energize the readers themselves to make thoughts and reflections.So far, I have dedicated over 4 years of my life to study and improve aquaponic systems in the hope that one day their production efficiency will be able to compete with state-of-theart hydroponic food production systems, while improving circularity. In this thesis, I will try to demonstrate why aquaponics does not face the same pitfalls as communism, while sharing the empowering people-minded and bottom-up qualities that are required in the 21st century.

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Treatment of Hydroponics Wastewater Using Constructed Wetlands in Winter Conditions

Cited by 74 publications

References 24 publications

Hydroponics Effluents: A Potential Threat To The Environment

Hydroponics Effluents: A Potential Threat To The Environment

Nitrate removal from tail water by integrated vertical-flow constructed wetlands at a high hydraulic loading rate

Opportunities and Challenges of Multi-Loop Aquaponic Systems

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