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All Journal Journal of Degraded and Mining Lands Management
Yooyen, Thanapon
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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Bioremediation and microbiome-generating electricity in butter catfish (Ompok bimaculatus) aquaculture wastewater treatment via water fern (Azolla microphylla) Thipraksa, Junjira; Yooyen, Thanapon; Chainapong, Thaweedet; Michu, Panisa; Kongthong, Alisa; Chaijak, Pimprapa
Journal of Degraded and Mining Lands Management Vol. 12 No. 1 (2024)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2024.121.6675

Abstract

The increasing volume of wastewater from fish farming poses a serious environmental threat. This study investigated a novel treatment method for butter catfish (Ompok bimaculatus) wastewater using a constructed wetland-microbial fuel cell (CW-MFC) integrated with the water fern Azolla microphylla. The system was effectiveness in removing pollutants like electrical conductivity (EC), total dissolved solids (TDS), ammonium, nitrate, nitrite, and phosphate was evaluated. Additionally, the electricity generation capabilities were measured. The CW-MFC system achieved significant removal rates: 67.65% for EC, 61.67% for TDS, 100% for ammonium, 75.00% for nitrate, 81.25% for nitrite, and 70.00% for phosphate. Furthermore, the system generated a maximum open-circuit voltage (OCV) of 690±90 mV, a current density (CD) of 7.29±0.43 mA/m³and a power density (PD) of 0.37±0.04 mW/m³. Analysis of the microbial community revealed a diverse root consortium dominated by bacterial genera including Phreatobacter, Emticicia and Rhodobacter, along with fungal genera such as Strelitziana, Ramularia, Cladosporium,Trichomerium, Cercospora, Erythrobasidium and Fusarium. These findings suggest that CW-MFC systems integrated with A. microphylla offer a promising approach for sustainable and efficient treatment of wastewater from catfish farming while simultaneously generating bioelectricity.
Integrated treatment and energy recovery from palm oil mill effluent using laccase-producing microalgae in a microbial fuel cell system Kongthong, Alisa; Yooyen, Thanapon; Chaijak, Pimprapa
Journal of Degraded and Mining Lands Management Vol. 12 No. 5 (2025)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2025.125.8987

Abstract

The treatment of palm oil mill effluent (POME) remains a significant environmental challenge due to its high organic load, complex pigmentation, and dark color. This study aimed to develop a sustainable low-input approach for POME treatment and bioelectricity generation using a photosynthetic microbial fuel cell (PMFC) under the environmental conditions. The heterotrophic green microalgae Choricystis parasitica SW-03 and the photosynthetic bacterial consortium have been used for pigment degradation and electricity generation. The degraded metabolites were determined using gas chromatography-mass spectrophotometry (GC-MS). The results showed the maximal open circuit voltage (OCV) of 0.702±0.02 V. Maximum current and power densities reached 19.20?±?2.40?mA/m3 and 2.81?±?0.61?mW/m3, respectively. The co-culture also demonstrated strong bioremediation performance. GC-MS analysis identified key degraded metabolites, including cyclotrisiloxane, hexamethyl; benzene,  1,3-dimethyl; benzene, 1,2,4-trimethyl; and cyclotetrasiloxane, octamethyl. These findings demonstrate that integrating microalgae SW-03 with photosynthetic bacteria in a PMFC presents an effective and eco-friendly strategy for POME treatment.
Co-Authors Chaijak, Pimprapa Chainapong, Thaweedet Kongthong, Alisa Michu, Panisa Thipraksa, Junjira