Treatment and re-use of raw blackwater by Chlorella vulgaris-based system

Segovia Bifarini, Marco Antonio (avtor), Žitnik, Miha (avtor), Griessler Bulc, Tjaša (avtor), Krivograd-Klemenčič, Aleksandra (avtor)

In this study, we examined a Chlorella vulgaris-based system as a potential solution to change liquid waste, such as blackwater, into valuable products for agriculture while protecting waters from pollution without technical demanding pre-treatment. To evaluate the possibility of nutrient removal and biomass production from raw blackwater, four blackwater dilutions were tested at lab-scale: 50%, 30%, 20%, and 10%. The results showed that even the less diluted raw blackwater was a suitable growth medium for microalgae C. vulgaris. As expected, the optimum conditions were observed in 10% blackwater with the highest growth rate (0.265 d$^{−1}$) and a nutrient removal efficiency of 99.6% for ammonium and 33.7% for phosphate. However, the highest biomass productivity (5.581 mg chlorophyll-a L$^{−1}$ d$^{−1}$) and total biomass (332.82 mg dry weight L$^{−1}$) were achieved in 50% blackwater together with the highest chemical oxygen demand removal (81%) as a result of the highest nutrient content and thus prolonged growth phase. The results suggested that the dilution factor of 0.5 followed by microalgae cultivation with a hydraulic retention time of 14 days could offer the highest biomass production for the potential use in agriculture and, in parallel, a way to treat raw blackwater from source-separation sanitation systems.

• Jezik: Angleški jezik
• Ključne besede: feces, urine, wastewater treatment, nutrients, biomass, agriculture
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: ZF - Zdravstvena fakulteta ; FGG - Fakulteta za gradbeništvo in geodezijo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2020
• Št. strani: 17 str.
• Številčenje: Vol. 12, iss. 10, art. 2660
• PID: 20.500.12556/RUL-125087
• UDK: 628.3
• ISSN pri članku: 2073-4441
• DOI: 10.3390/w12102660
• COBISS.SI-ID: 30855683
• Datum objave v RUL: 04.03.2021

Gradivo je del revije

• Naslov: Water
• Skrajšan naslov: Water
• Založnik: Molecular Diversity Preservation International - MDPI
• ISSN: 2073-4441
• COBISS.SI-ID: 36731653

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
• Začetek licenciranja: 01.10.2020

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: fekalije, urin, čiščenje odpadnih voda, hranila, biomasa, kmetijstvo