Manual Treatment of Urban Wastewater by Chemical Precipitation for Production of Hydroponic Nutrient Solutions

• Autorzy: Correia Tânia , Regato Mariana , Almeida Adelaide , Santos Teresa , Amaral Leonor , Carvalho Fátima

Identyfikatory

DOI

10.12911/22998993/118286

• Języki publikacji: EN

Abstrakty

EN

An urban wastewater treatment system was developed in Portugal for posterior in situ feasibility testing at the Bulgarian Antarctic Base, using its domestic wastewater. The aim of this system was to develop a low cost, integrated approach for wastewater treatment and production of nutrient solutions (NS) for hydroponic cultivation of lettuce (Lactuca sativa var. crispa) in Antarctic stations, or any other place where the lack of resources and logistical hardships make the wastewater treatment and reuse impractical. The wastewater treatment system consisted in manual agitation lime chemical precipitation (LCPm) and effluent natural neutralization (NN) by atmospheric CO₂ carbonation reactions (with and without air injection). The resulting effluent/NS had macronutrient values (nitrogen and phosphorous) for the hydroponic cultivation of lettuce below the values of commercial NS and a high pH (pH ≈ 8). The treatment achieved a total coliform removal rate of 100%. Before the LCPm treatment system development, several lime-based reagents were tested under different reaction pH and using mechanical agitation, to access their organic matter removal efficiency, as chemical oxygen demand (COD). The best COD removal results obtained were: commercial Ca(OH)₂ (pH 11.5 – 89%), reagent grade Ca(OH)₂ (pH 11.5 – 79%) and CaO (pH 12.0 – 64%).

Słowa kluczowe

EN

urban wastewater; antarctica; chemical precipitation; CO2 capture; hydroponics

• Wydawca: Polskie Towarzystwo Inżynierii Ekologicznej ; Lublin University of Technology
• Czasopismo: Journal of Ecological Engineering
• Rocznik: 2020
• Tom: Vol. 21, nr 3
• Strony: 143--152
• Opis fizyczny: Bibliogr. 23 poz., rys., tab.

Twórcy

autor

Correia Tânia

• Polytechnic Institute of Beja, Street Pedro Soares – IPB Campus, 7800-295 Beja, Portugal

autor

Regato Mariana

• Polytechnic Institute of Beja, Street Pedro Soares – IPB Campus, 7800-295 Beja, Portugal

autor

Almeida Adelaide

• Polytechnic Institute of Beja, Street Pedro Soares – IPB Campus, 7800-295 Beja, Portugal
• FibEnTech – Fiber Materials and Environmental Technologies, Street Marques de Avila e Bolama, 6201-001, Covilhã, Portugal

autor

Santos Teresa

• Polytechnic Institute of Beja, Street Pedro Soares – IPB Campus, 7800-295 Beja, Portugal

autor

Amaral Leonor

• CENSE – Center for Environmental and Sustainability Research, NOVA School of Science and Technology, NOVA University Lisbon, Caparica, Portugal

autor

Carvalho Fátima

• Polytechnic Institute of Beja, Street Pedro Soares – IPB Campus, 7800-295 Beja, Portugal
• FibEnTech – Fiber Materials and Environmental Technologies, Street Marques de Avila e Bolama, 6201-001, Covilhã, Portugal

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).