Agricultural reuse of cheese whey wastewater treated by NaOH precipitation for tomato production under several saline conditions and sludge management

Prazeres, Ana R.; Rivas, Javier; Almeida, Maria Adelaide Araújo; Patanita, Manuel; Dôres, José; Carvalho, Fátima

doi:10.1016/j.agwat.2015.12.025

Cited by 46 publications

(32 citation statements)

References 49 publications

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“…The improved okra yields can be mainly attributed to the continuous supply of because nutrients from TGW. In most cases, plants irrigated with treated wastewater or greywater contained greater nitrogen concentrations at all levels of water quantities than those irrigated with fresh water . The higher plant yield from treated wastewater irrigation could also be due to increases in the total carbon and total nitrogen concentrations in the soil, as well as increased microbial activity .…”

Section: Resultsmentioning

confidence: 99%

“…However, given diminishing freshwater resources, the use of potable water for irrigation is not sustainable, particularly in semi‐arid and arid regions. Thus, wastewater reuse in agriculture is becoming increasingly necessary in regions where water resources are scarce and water supply systems are fragile . More than 44 countries reuse a total of over 15 million m 3 .day −1 of reclaimed water for irrigation purposes .…”

Section: Introductionmentioning

confidence: 99%

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Short term effects of treated greywater by high rate algal ponds process on vegetable yield and soil properties under Sudano‐Sahelian climate conditions

Sangaré

Sawadogo

Sou

et al. 2017

Env Prog and Sustain Energy

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Greywater is a valuable additional water source for agriculture in arid and semi‐arid countries subject to water scarcity. However, the impacts of applying greywater to agricultural land in the Sudano‐Sahelian regions are not adequately understood. This study evaluates the impacts of using greywater, treated by the High Rate Algal Ponds system (HRAPs), on soil characteristics and okra growth and yield in the Sudano‐Sahelian regions. The methodology consisted of growing okra under four different irrigation conditions: (i) treated greywater (TGW); (ii) fresh well water (FWW); (iii) TGW and chemical fertilizer (TGW + FERT) and (iv) FWW and chemical fertilizer (FWW + FERT). The test beds were sampled before and after cultivation to analyze soil pH and sodicity status (e.g., sodium absorption ratio: SAR). The okra growth, fruit yield and total dry biomass were recorded. Fresh fruit weight is significantly higher with TGW (761.17 ± 53.69 kg.ha−1) compared to FWW (497.15 ± 100.02 kg.ha−1) and FWW + FERT (307.93 ± 100.04 kg.ha−1). This result likely occurs due to the nutrients (e.g., nitrogen) present in TGW. Conversely, the average SAR of soil irrigated with TGW + FERT (12.47) and TGW (8.83) are significantly higher than those of the soil irrigated with FWW (2.92) and soil before cultivation (0.95). Therefore, it is recommended that soil salinity or/and sodicity is monitored when irrigating with TGW and that well water is used for every third irrigation cycle to prevent soil degradation though increased salinity. Overall, the appropriate reuse of greywater improves food security and the sustainability of agriculture in arid to semi‐arid regions. © 2017 American Institute of Chemical Engineers Environ Prog, 37: 465–470, 2018

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Short term effects of treated greywater by high rate algal ponds process on vegetable yield and soil properties under Sudano‐Sahelian climate conditions

Sangaré

Sawadogo

Sou

et al. 2017

Env Prog and Sustain Energy

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“…Coagulation-flocculation with FeSO4, FeCl3 and Al2(SO4)3 [11,12], alkaline and acid precipitation with NaOH, Ca(OH)2 and H2SO4 [12][13][14][15][16] and oxidation processes with O3, O3+H2O2, O3+N-150 (Fe2O3-MnOx), O3+Mn-Ce-O (70/30) [17] and Fenton [18] have been applied. Martins and Quinta-Ferreira [17] and Martins et al [18] reported the reduction of organic matter by oxidation processes in pretreated cheese whey wastewater.…”

Section: Introductionmentioning

confidence: 99%

Reduction of Total Phenols, Total Phosphorus and Turbidity by Uncatalytic Oxidation Processes in Cheese Whey Wastewater

Prazeres

Luz

Fernandes

et al. 2020

The 5th Ibero-American Congress on Entrepreneurship, Energy, Environment and Technology - CIEEMAT 2019

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This study reports the first time that cheese whey wastewater has been treated by the hydrogen peroxide oxidation alone (uncatalytic reaction). This oxidation type was capable of eliminating the total phosphorus content in about 46–53%, regardless of the dose applied (1–7 g L−1). For total phenols contents, the oxidation system was capable of reducing around 40% under the lowest concentration investigated (1 g L−1). Similar results were obtained for calcium content with a reduction of 55%. Turbidity was reduced in about 90% when hydrogen peroxide was applied with concentrations of 2, 3 and 7 g L−1. Characteristic absorbances were reduced in the range of 12–83% depending on the operating conditions. Chemical oxygen demand (COD) was recalcitrant to hydrogen peroxide oxidation alone (uncatalytic reaction), needing a post-treatment.

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“…However, the main disadvantages associated with the referred technologies were pathogen regrowth and prevalence of emerging organic micro-pollutants. Prazeres et al [14] studied the use of cheese whey wastewater treated by NaOH precipitation for tomato production. It was concluded that NaOH precipitation is a viable physicochemical process to pretreat cheese whey wastewater using a combination of aerobic digestion, sedimentation and centrifugation, achieving a sludge volume reduction of 80% and simultaneously producing an effluent with organic matter depletion of around 40%.…”

Section: Introductionmentioning

confidence: 99%

Viability of the Use of Leachates from a Mechanical Biological Municipal Solid Waste Treatment Plant as Fertilizers

2019

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The main environmental issue associated with compost production is the production of a liquid leachate. Leachate from municipal wastes contains carbon, nitrogen, phosphorus, potassium and trace elements that can be used as nutrients by plants. The advantages of the use of organic wastes such as compost leachate as fertilizers are evident. Their use would reduce the consumption of commercial fertilizers, which need, with their production, high cost and energy. This work aims to determine the physical and chemical properties of a specific leachate with a variable composition, collected from the composting line of a mechanical and biological treatment facility. The goal is to assess if the leachates can be used as a potential source for fertilizers, and thus develop and design a sequence of processes which could effectively convert the leachates to commercial fertilizers according to the requirements of the proposal of regulation of the European Parliament of 2016 for fertilizers. Preliminary results show that the leachate samples qualitatively meet the requirements established for the composition of commercial fertilizers, especially organo-mineral fertilizers. Furthermore, there is no production cost of leachate as a raw material. The results show that the leachate is characterized by manageable concentrations of heavy metals which can be removed by adsorption processes, and it presents suitable amounts of organic carbon after a water removal procedure. However, the establishment of the conditions for suitable conversion processes are still under investigation considering the high composition variability due to factors like storage and environmental conditions.

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Agricultural reuse of cheese whey wastewater treated by NaOH precipitation for tomato production under several saline conditions and sludge management

Cited by 46 publications

References 49 publications

Short term effects of treated greywater by high rate algal ponds process on vegetable yield and soil properties under Sudano‐Sahelian climate conditions

Short term effects of treated greywater by high rate algal ponds process on vegetable yield and soil properties under Sudano‐Sahelian climate conditions

Reduction of Total Phenols, Total Phosphorus and Turbidity by Uncatalytic Oxidation Processes in Cheese Whey Wastewater

Viability of the Use of Leachates from a Mechanical Biological Municipal Solid Waste Treatment Plant as Fertilizers

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