Greywater reuse concept design in combination with solar thermal systems applied to a touristic facility : master thesis no.: 115/II. VOI

Ušaj, Ivo (author), Atanasova, Nataša (mentor), De Simone, Marilena (co-mentor)

Tourist facilities have a significant impact on the ecological footprint, mainly due to the excessive use of water and energy resources. The thesis provides the design of measures aimed at reducing drinking water and energy consumption in a real case study, Hotel Salinera (Slovenia), along with the assessment of their feasibility. It addresses the following measures: greywater separation and treatment with a membrane bioreactor (MBR), greywater separation and treatment with a constructed wetland (CW), and the design and evaluation of a solar thermal system to reduce energy consumption in the hotel. Both technologies for greywater treatment and reuse have similar investment costs. However, the operating costs of the MBR are much higher compared to the CW. While the investment for the CW is returned in less than 8 years, this period is significantly longer for the MBR, approximately 30 years. Both measures reduce the drinking water consumption by estimated 45%. The implementation of the solar thermal system takes into account the limitations due to the limited available areas. The only viable option is the installation of a smaller number of solar collectors, which can provide a 26% reduction in the consumption of the classic energy system. The economic analysis of the solar thermal system confirms the almost immediate return on investment. The economic analysis does not take into account additional benefits such as resilience, lower consumption of resources, lower environmental pollution, and in the case of the CW also additional cooling and additional green space (biodiversity).

• Language: English
• Keywords: civil engineering, master thesis, greywater treatment, greywater reuse, membrane bioreactor, constructed wetland, solar thermal system, solar collector, solar fraction
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: FGG - Faculty of Civil and Geodetic Engineering
• Place of publishing: Ljubljana
• Publisher: [I. Ušaj]
• Year: 2023
• Number of pages: XII, 91 str., [2] f. zganj. pril.
• PID: 20.500.12556/RUL-151149-95a05555-a056-cc8c-d5d5-2f9007e30070
• UDC: 628.179.2:728.5(043.3)
• COBISS.SI-ID: 173947651
• Publication date in RUL: 30.09.2023

Secondary language

• Language: Slovenian
• Title: Načrtovanje ponovne uporabe sive vode v kombinaciji s solarnimi toplotnimi sistemi za turistični objekt : magistrsko delo št. 115/II. VOI

Abstract

Turistični objekti pomembno vplivajo na ekološki odtis predvsem zaradi prekomernega izkoriščanja vodnih in energetskih virov. Magistrsko delo predstavlja načrtovanje nekaterih ukrepov in njihovo oceno izvedljivosti za zmanjšanje porabe pitne vode in energije v Hotelu Salinera (Slovenija). Obravnavani ukrepi vključujejo: ločevanje sive vode in njeno čiščenje z membranskim bioreaktorjem (MBR), ločevanje sive vode in čiščenje z rastlinsko čistilno napravo (RČN) ter zasnovo in oceno izvedljivosti solarnega toplotnega sistema za zmanjšanje energetske porabe. Obe tehnologiji za čiščenje in ponovno uporabo sive vode imata podobne stroške investicije. Obratovalni stroški MBR sistema so veliko višji v primerjavi z RČN. Medtem ko je povratek investicije za RČN manjši od 8 let, je ta doba bistveno daljša za MBR, cca 30 let. Oba ukrepa zmanjšata porabo pitne vode za ocenjenih 45%. Zasnova solarnega toplotnega sistema upošteva omejitve zaradi omejenih razpoložljivih površin. Edina izvedljiva možnost je vgradnja manjšega števila solarnih kolektorjev, ki lahko zagotavljajo 26% zmanjšanje porabe klasičnega energetskega sistema. Ekonomska analiza solarnega toplotnega sistema potrjuje skoraj takojšnjo donosnost naložbe, zaradi katere je njena implementacija povsem izvedljiva. Ekonomska analiza sicer ne upošteva širših implikacij trajnostnega upravljanja z viri, ki bi celotno sliko dodatno obogatile. Dodatne koristi, ki jih taki koncepti prinašajo so odpornost na pomanjkanje vode ali energije, manjša poraba virov, manjše onesnaževanje okolja, saj bi hotel proizvajal manj odpadne vode in porabil manj energije iz neobnovljivih virov, pri RČN tudi dodatno hlajenje zaradi evapotranspiracije in povečanje biodiverzitete.

• Keywords: gradbeništvo, magistrsko delo, VOI, čiščenje sive vode, ponovna uporaba sive vode, membranski bioreaktor, rastlinska čistilna naprava, solarni toplotni sistem, solarni kolektor, sončna frakcija, zasnova