Element sulfur-based autotrophic denitrification constructed wetland as an efficient approach for nitrogen removal from low C/N wastewater

Nitrogen removal performance of improved subsurface wastewater infiltration system under various influent carbon–nitrogen ratios

“…Considering the current pollution status of environmental degradation and global warming, the implementation of wastewater treatment should evaluate the simultaneous removal of N pollutants and the reduction of N 2 O emissions (Huang et al, 2023). However, the lack of electron donors may be the main reason for inhibiting the denitrification efficiency in SWIS treating wastewater with limited C content (Wang et al, 2022). Generally, the addition of external C sources such as acetic acid and methanol has secondary contamination risks and requires expensive control systems (Xu et al, 2023).…”

Sustainable high-efficiency removal of cationic and anionic dyes using new super adsorbent biochar: performance, isotherm, kinetic and thermodynamic evaluation

“…The adsorption performance of each biochar was prominently affected by the initial concentration of MG and CR dyes. 84 The adsorption study of MG and CR was also conducted by varying the starting concentration from 10 to Environmental Science: Water Research & Technology Paper 1500 mg L −1 . The obtained results are presented in Fig.…”

Thermodynamic Inhibition of Microbial Sulfur Disproportionation in a Multisubunit Designed Sulfur-Siderite Packed Bioreactor

“…5 As a result, this approach offers significant advantages, including independence from organic carbon, lower operational costs, and zero carbon dioxide emissions, while demonstrating impressive nitrate removal capabilities. 7,8 Although the S 0 AD process is becoming increasingly accepted in the wastewater treatment industry, another S 0associated process named sulfur disproportionation (S 0 DP) has also gained significant attention. 9 S 0 DP plays a crucial role in the natural sulfur cycle, especially in marine ecosystems, and contributes to the isotopic signatures of sulfidic minerals in diverse sediments.…”

“…Owing to its low valence state, indicating a significant availability of donatable electrons, S 0 has been extensively utilized as an electron donor for sulfur autotrophic denitrification (S 0 AD) in the wastewater treatment process. − Taking into account the acidogenic characteristic of the S 0 AD process, we combined siderite, an alkaline mineral, with sulfur to construct sulfur-siderite packing bioreactors (S 2 PBs), which successfully achieved a substantial improvement in S 0 AD performance . As a result, this approach offers significant advantages, including independence from organic carbon, lower operational costs, and zero carbon dioxide emissions, while demonstrating impressive nitrate removal capabilities. , …”