Gaseous carbon and nitrogen emissions from microbial fuel cell-constructed wetlands with different carbon sources: Microbiota-driven mechanisms

Niu, Tingting; Zhu, Hui; Shutes, Brian; He, Chunguang

doi:10.1016/j.jclepro.2023.140404

Cited by 2 publications

(1 citation statement)

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“…Flavobacterium and unclassified_f_Comamonadaceae are frequent filamentous bacteria in the activated sludge of sewage plants. Flavobacterium can induce denitrifying bacteria to perform anaerobic respiration to extract nitrate from sewage [46], and it also collaborates with unclassified_f_Comamonadaceae to break down complex organic molecules and hazardous compounds in sewage. Gemmobacter uses organic contaminants in wastewater as a carbon source for metabolic processes, thereby decomposing polluting organic materials in sewage.…”

Section: Microbial Species Diversitymentioning

confidence: 99%

Denitrification Performance and Microbiological Mechanisms Using Polyglycolic Acid as a Carbon Source

Wang,

Li,

Yang

et al. 2024

Water

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When treating municipal wastewater, nitrogen removal is often limited due to low C/N, which needs to be compensated for by additional carbon source injections. This study investigated the feasibility of using industrial-waste polyglycolic acid (PGA) as a carbon source for denitrification in an SBR to obtain an economical carbon source. The results revealed that an optimal denitrification performance in a methanol-fed activated sludge system was achieved with a PGA dosage of 1.2 mL/L, a pH of 7–8, and a dissolved-oxygen (DO) concentration of 3 ± 0.5 mg/L. Under these conditions, all quality parameters for effluent water met the required criteria [COD < 50 mg/L; TN < 15 mg/L; NH4+-N < 5(8) mg/L]. PGA enhanced the variety and richness of microbial communities, thereby markedly increasing the relative abundance of major phyla such as Proteobacteria and Bacteroidota and major genera such as Paracoccus and Dechloromonas. Furthermore, PGA upregulated the expression of nitrogen-metabolism-related genera, including amo, hao, nar, and nor, which improved the denitrification performance of the system. This study provides a reference for applying PGA as a carbon source for low-C/N-wastewater treatment and solid-waste utilization.

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Section: Microbial Species Diversitymentioning

confidence: 99%