Agricultural reuse of municipal wastewater through an integral water reclamation management

Intriago, Juan Carlo; López‐Gálvez, Francisco; Allende, Ana; Vivaldi, Gaetano Alessandro; Camposeo, Salvatore; Nicolás, Emilio; Alarcón, Juan José; Salcedo, Francisco Pedrero

doi:10.1016/j.jenvman.2018.02.011

Cited by 44 publications

(33 citation statements)

References 42 publications

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“…Further, grass-legume mixture 6 removed a lower quantity of P than grass-legume mixtures 1, 2, 5, 8, 16, 17, and 18 (Table 5). During 2018, the grass-legume mixture 8, removed a greater amount of P than red and white clover monocultures, and grass-legume mixtures 1,2,10,11,12,13,16, and 18 ( Table 5). The monocultures of red and white clover removed the least amount of P during 2018 ( Table 5).…”

Section: Forage System Phosphorus Removalmentioning

confidence: 99%

“…One suitable and sustainable approach to agricultural production in water-scarce regions is the utilization of alternative water resources in the form of the large quantity of wastewater generated from municipalities [3][4][5][6][7][8][9]. The benefits of utilizing reclaimed wastewater are multiple, in that it provides a reliable year-round source of water for crop production [3], crop yield optimization through the provision of nutrients such as N, P, and K [9][10][11], reduced demand on fossil fuel for synthetic fertilizer production, minimize fertilizer input cost [3], increase crop farm profit margins [12], and enhance environmental conservation due to a reduction in synthetic fertilizer use [13].…”

Section: Introductionmentioning

confidence: 99%

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Grass–Legume Forage Systems Effect on Phosphorus Removal from a Grassland Historically Irrigated with Reclaimed Wastewater

2020

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The utilization of reclaimed wastewater is a suitable and sustainable approach to agriculture production in water-scarce regions. However, even though the wastewater is treated to reduce nutrient concentration such as phosphorus, the 10,600 to 14,006 m3 of water applied ha−1 year−1 on grass and alfalfa hay crops in Nevada can lead to soil phosphorus buildup over an extended period. This study evaluated the effectiveness of forage systems (FS) of monoculture grass, monoculture legume, and their mixtures on herbage accumulation, tissue phosphorus concentration, and quantity of phosphorus removed from a grassland under wastewater irrigation. The study was carried out at the Main Station Field laboratory in Reno, Nevada, USA. A total of 23 FS using tall fescue (Schedonorus arundinaceus (Schreb.) Dumort), alfalfa (Medicago sativa L.), red clover (Trifolium pratense L.) and white clover (Trifolium repens L.) in monocultures or grass–legume mixtures (25:75, 50:50, and 75:25) based on seeding rate were used. The response variables were herbage accumulation (HA), tissue phosphorus concentration, and phosphorus removal. Forage systems means were considered different P ≤ 0.05. Herbage accumulation, tissue phosphorus concentration, and phosphorus removal differed among FS and year. Herbage accumulation was similar for the grass monocultures (10.5 Mg ha−1; SE = 1.1) and the majority of the grass–legume mixtures (9.0 Mg ha−1; SE = 1.1) but both systems had greater HA than legumes monoculture (4.3 Mg ha−1; SE = 1.1). The legume monocultures of alfalfa and white clover had the greatest phosphorus concentrations (10.9 g kg−1 dry matter; SE = 0.44) among all FS. Total phosphorus removed was least among legume monocultures (34.0 kg P ha−1; SE = 6.2) in this study and generally similar for grass monocultures (67.4 kg P ha−1; SE = 6.2) and grass–legume mixtures of 75:25 (61.7 kg P ha−1; SE = 6.2). Based on the response variables, agronomic, and environmental considerations a grass–legume mixture that includes 75:25 or even a 50:50 seeding rate ratio will be suitable options for phosphorus removal from phosphorus enriched grasslands in semiarid ecosystems that utilized wastewater for irrigation.

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Section: Forage System Phosphorus Removalmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Grass–Legume Forage Systems Effect on Phosphorus Removal from a Grassland Historically Irrigated with Reclaimed Wastewater

2020

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“…The analysis of the possibility of reuse was performed by comparing the wastewater parameters with the reuse standards suggested by the USA Environmental Protection Agency [37], and with the literature applied for different situations [19,33,39,40]. Table 3 presents the results obtained in the central composite design (CCD) experiments as a function of the studied variables.…”

Section: Options For Reusementioning

confidence: 99%

“…Loy et al [38] demonstrated that municipal wastewater treated by conventional activated sludge and anaerobic digesters causes less soil degradation than the use of brackish groundwater for the irrigation of farms. Intriago et al [19] used reclaimed water with similar microbiological contamination for lettuce irrigation. Šrámková et al [39] verified that wastewater with turbidity, color or organic load similar to this work can be used for irrigation or cooling of industrial systems.…”

Section: Options For Reusementioning

confidence: 99%

“…Several mechanisms of removal and degradation may exist simultaneously in the electrochemical reactor [11][12][13]16]. It has been successfully applied in the treatment of water for reuse purposes [11][12][13], including post-treatment of UASB effluent [17,18], especially when there is the option of replacing energy matrices with renewable sources [19,20].…”

Section: Introductionmentioning

confidence: 99%

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Electrocoagulation coupled adsorption for anaerobic wastewater post-treatment and reuse purposes

Pizutti¹,

Santos²,

Hemkemeier³

et al. 2019

Desalination and Water Treatment

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Water reuse is an indispensable reality in the search for an equilibrium between water resources and water scarcity. The recovery and production of reclaimed water with a guarantee of safety of use requires advanced treatment technologies. This study proposes a conjugated system, composed of electrocoagulation followed by adsorption, for the post-treatment of UASB effluent for reuse purposes. For this purpose, initially the electrocoagulation process (EC) was optimized using response surface methodology. The optimum conditions were for a current density of 29.44 A/m 2 and pH 6.0, with 44.58% of COD removal and energy consumption of 31.1 kWh per kg of COD removed. The EC effluent was treated by adsorption on a fixed bed column of activated carbon. The conjugated system provided the complete removal of COD and BOD, and significant removals of turbidity (96.5%), phosphorus (97.5%) and total and thermotolerant coliforms. The quality of the final treated water reached parameters for reuse according to EPA.

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Twenty‐five essential research questions to inform the protection and restoration of freshwater biodiversity

Harper

Mejbel

Longert

et al. 2021

Aquatic Conservation

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Freshwater biodiversity is declining at an unprecedented rate. Freshwater conservationists and environmental managers have enough evidence to demonstrate that action must not be delayed but have insufficient evidence to identify those actions that will be most effective in reversing the current trend. Here, the focus is on identifying essential research topics that, if addressed, will contribute directly to restoring freshwater biodiversity through supporting ‘bending the curve’ actions (i.e. those actions leading to the recovery of freshwater biodiversity, not simply deceleration of the current downward trend). The global freshwater research and management community was asked to identify unanswered research questions that could address knowledge gaps and barriers associated with ‘bending the curve’ actions. The resulting list was refined into six themes and 25 questions. Although context‐dependent and potentially limited in global reach, six overarching themes were identified: (i) learning from successes and failures; (ii) improving current practices; (iii) balancing resource needs; (iv) rethinking built environments; (v) reforming policy and investments; and (vi) enabling transformative change. Bold, efficient, science‐based actions are necessary to reverse biodiversity loss. We believe that conservation actions will be most effective when supported by sound evidence, and that research and action must complement one another. These questions are intended to guide global freshwater researchers and conservation practitioners, identify key projects and signal research needs to funders and governments. Our questions can act as springboards for multidisciplinary and multisectoral collaborations that will improve the management and restoration of freshwater biodiversity.

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Agricultural reuse of municipal wastewater through an integral water reclamation management

Cited by 44 publications

References 42 publications

Grass–Legume Forage Systems Effect on Phosphorus Removal from a Grassland Historically Irrigated with Reclaimed Wastewater

Grass–Legume Forage Systems Effect on Phosphorus Removal from a Grassland Historically Irrigated with Reclaimed Wastewater

Electrocoagulation coupled adsorption for anaerobic wastewater post-treatment and reuse purposes

Twenty‐five essential research questions to inform the protection and restoration of freshwater biodiversity

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