Work

Using Azolla microphylla in investigating different agro-wastewaters treatment and its biomass growth for carbon sequestration

Year: 2024

Type: article

Abstract: Nowadays, water scarcity, inadequate water quality and water pollution has emerged as a worldwide issue. The heighten emission of carbon dioxide is also a significant contributor to global warming by intensifying the greenhouse gas effect. In this present study, agro-wastewaters from different sources including 5% swine wastewater (5%SW), poultry wastewater (PW) and aquaculture wastewater (AW) were investigated by using an aquatic plant; Azolla microphylla. The experimental design was considered to investigate the phytoremediation potential of A.microphylla in wastewater treatment. Furthermore, potential biomass production of Azolla in various wastewaters and its carbon sequestration from the atmosphere were also investigated. After two weeks experiment, the highest BOD removal 83% and COD removal 82% were observed in 5% SW, PW and AW, respectively. The removal of NO3-N 48% and PO43- 93% were also found in 5% SW. Notably, the removal efficiency of nutrients and pollutants in the experimental system using A. microphylla was significantly higher than compared to control. In aspect of biomass production, A. microphylla produced the maximum absolute growth rate of 26.14 g/day in PW. Interestedly, atmospheric carbon dioxide sequestration had a positively strong correlation with dry weight of A. microphylla. According to the significant biomass production, the highest rate of carbon dioxide sequestration 20.73 g CO2 was observed in PW. In consequently, our study mechanism would be a simple and the findings enhanced our understanding of Azolla’s biomass transformation is functionable for phytoremediation in wastewater treatment and biological carbon fixation in order to eliminate atmospheric carbon dioxide.

Source: Results in Engineering

DOI: 10.1016/j.rineng.2024.103865

Authors: Nyein Nyein, Chuleemas Boonthai Iwai

Institution: Khon Kaen University

Language: English

Topic: Constructed Wetlands for Wastewater Treatment

Subfield: Waste Management and Disposal

Field: Environmental Science

Domain: Physical Sciences

SDGs: Clean water and sanitation, Responsible consumption and production, Climate action, Zero hunger

Open Access status: gold

Estimated APC paid: $1,490