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Reclaiming Brewery Wastewater for Soilless Urban Agriculture.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Reclaiming Brewery Wastewater for Soilless Urban Agriculture./
作者:	Riera Vila, Ignasi.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2019,
面頁冊數:	72 p.
附註:	Source: Masters Abstracts International, Volume: 80-09.
Contained By:	Masters Abstracts International80-09.
標題:	Horticulture. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=13425385
ISBN:	9780438903326

Reclaiming Brewery Wastewater for Soilless Urban Agriculture.
Riera Vila, Ignasi.

Reclaiming Brewery Wastewater for Soilless Urban Agriculture. - Ann Arbor : ProQuest Dissertations & Theses, 2019 - 72 p.

Source: Masters Abstracts International, Volume: 80-09.

Thesis (M.S.)--University of Minnesota, 2019.

This item must not be sold to any third party vendors.

Urban agriculture refers to all agricultural activities that happen within the city limits. Traditionally, urban agriculture has been mostly a subsistence form of agriculture that allowed for vegetable self-assortment and occasional trade (Mougeot, 2005). In recent years, urban agriculture has gained in popularity to promote greener cities, ensure food security and healthy diets, and create new economic opportunities (Golden, 2013). Most of the world's food production is consumed and transformed in the cities generating large amounts of organic waste. Urban agriculture has been proposed as a key activity to help recycle those nutrients present in that waste (Metson & Bennett, 2015; Smit & Nasr, 1992). Soilless systems allow urban growers to move agriculture into areas traditionally not used for production, such as rooftops, inside buildings, and parking lots. In some cases, building integration can improve overall efficiency, via increased insulation, CO2 enrichment, and water reuse (Buehler & Junge, 2016; Despommier, 2011; Sanye-Mengual, Ceron-Palma, Oliver-Sola, Montero, & Rieradevall, 2015; Wortman, 2015). Wastewater in the US is mostly treated in a centralized manner with large amounts of energy used to aerate and remove carbon and nutrients present in the water. Irrigation with wastewater helps recycle nutrients and reduce water consumption. However, challenges to wastewater recycling include the presence of heavy metals and pathogens, especially if the treatment was improper. Decentralized treatment allows for water treated onsite. From and agricultural perspective, this allows a source of wastewater with higher nutrient load but devoid of pathogens and heavy metals presence (Libralato, Ghirardini, & Avezzu, 2012; Mohareb et al., 2017). Brewery industry produces large amounts of wastewater with a high carbon load and moderate presence of nutrients like nitrogen and phosphorus. In this project, an integrated pretreatment system is being developed where an encapsulated anaerobic digester reduces the carbon load of the brewery wastewater while producing hydrogen and methane, used to produce energy. The effluent from the digester is used for soilless urban agriculture to produce vegetables while reducing nutrient load. The final effluent may then be sent to the municipal treatment plant, with a much lower nutrient and carbon load that will require less energy for its treatment. The effluent was first used in hydroponic production growing Basil (Ocimum basilicum), and mustard greens (Brassica juncea), grown in a non-circulating individual hydroponic system. In both experiments, yield of the plants was compared to plants grown using inorganic fertilizer. Our results showed that plants grown with digested wastewater had lower yields as well as higher mortality. We attributed this to a low nutrient availability, nitrogen insufficiency, high electrical conductivity, and an unstable pH. In the following experiments ammonia was used in the digester to correct for pH instead of CaCO3 with the objective of increasing N content while maintaining low electrical conductivity. Two different substrate experiments were performed, in the first one Mustard greens were grown in four different substrates: peat-based, peat based mixed 50% (v/v) with fine sand, compost based, and compost based mixed 50% (v/v) with sand. In the second mustard greens, basil and lettuce (lactuca sativa) were grown in peat. In both experiment, four different fertility treatments were used: only water, water mixed with synthetic fertilizer, raw brewery wastewater and digested wastewater from the same brewery. In the first experiment results showed similar mustard greens yields with plants grown using inorganic fertilizer compared to plants grown with inorganic fertilizer, and no big differences among substrates. In the second , lettuce and mustard greens digested wastewater grown plants had similar than inorganic fertilizer while basil had lower yields. In conclusion, it is possible to create a decentralized system that combines anaerobic digestion with soilless urban agriculture reusing brewery effluent.

ISBN: 9780438903326Subjects--Topical Terms:

555447
Horticulture.

Reclaiming Brewery Wastewater for Soilless Urban Agriculture.
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520 $a Urban agriculture refers to all agricultural activities that happen within the city limits. Traditionally, urban agriculture has been mostly a subsistence form of agriculture that allowed for vegetable self-assortment and occasional trade (Mougeot, 2005). In recent years, urban agriculture has gained in popularity to promote greener cities, ensure food security and healthy diets, and create new economic opportunities (Golden, 2013). Most of the world's food production is consumed and transformed in the cities generating large amounts of organic waste. Urban agriculture has been proposed as a key activity to help recycle those nutrients present in that waste (Metson & Bennett, 2015; Smit & Nasr, 1992). Soilless systems allow urban growers to move agriculture into areas traditionally not used for production, such as rooftops, inside buildings, and parking lots. In some cases, building integration can improve overall efficiency, via increased insulation, CO2 enrichment, and water reuse (Buehler & Junge, 2016; Despommier, 2011; Sanye-Mengual, Ceron-Palma, Oliver-Sola, Montero, & Rieradevall, 2015; Wortman, 2015). Wastewater in the US is mostly treated in a centralized manner with large amounts of energy used to aerate and remove carbon and nutrients present in the water. Irrigation with wastewater helps recycle nutrients and reduce water consumption. However, challenges to wastewater recycling include the presence of heavy metals and pathogens, especially if the treatment was improper. Decentralized treatment allows for water treated onsite. From and agricultural perspective, this allows a source of wastewater with higher nutrient load but devoid of pathogens and heavy metals presence (Libralato, Ghirardini, & Avezzu, 2012; Mohareb et al., 2017). Brewery industry produces large amounts of wastewater with a high carbon load and moderate presence of nutrients like nitrogen and phosphorus. In this project, an integrated pretreatment system is being developed where an encapsulated anaerobic digester reduces the carbon load of the brewery wastewater while producing hydrogen and methane, used to produce energy. The effluent from the digester is used for soilless urban agriculture to produce vegetables while reducing nutrient load. The final effluent may then be sent to the municipal treatment plant, with a much lower nutrient and carbon load that will require less energy for its treatment. The effluent was first used in hydroponic production growing Basil (Ocimum basilicum), and mustard greens (Brassica juncea), grown in a non-circulating individual hydroponic system. In both experiments, yield of the plants was compared to plants grown using inorganic fertilizer. Our results showed that plants grown with digested wastewater had lower yields as well as higher mortality. We attributed this to a low nutrient availability, nitrogen insufficiency, high electrical conductivity, and an unstable pH. In the following experiments ammonia was used in the digester to correct for pH instead of CaCO3 with the objective of increasing N content while maintaining low electrical conductivity. Two different substrate experiments were performed, in the first one Mustard greens were grown in four different substrates: peat-based, peat based mixed 50% (v/v) with fine sand, compost based, and compost based mixed 50% (v/v) with sand. In the second mustard greens, basil and lettuce (lactuca sativa) were grown in peat. In both experiment, four different fertility treatments were used: only water, water mixed with synthetic fertilizer, raw brewery wastewater and digested wastewater from the same brewery. In the first experiment results showed similar mustard greens yields with plants grown using inorganic fertilizer compared to plants grown with inorganic fertilizer, and no big differences among substrates. In the second , lettuce and mustard greens digested wastewater grown plants had similar than inorganic fertilizer while basil had lower yields. In conclusion, it is possible to create a decentralized system that combines anaerobic digestion with soilless urban agriculture reusing brewery effluent.
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710 2 $a University of Minnesota. $b Applied Plant Sciences. $3 1271129
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