Details zur Publikation

Referenztyp Zeitschriften
DOI / URL Link
Titel (primär) Sulfate removal and sulfur transformation in constructed wetlands: The roles of filling material and plant biomass
Autor Chen, Y.; Wen, Y.; Zhou, Q.; Huang, J.; Vymazal, J.; Kuschk, P.;
Journal / Serie Water Research
Erscheinungsjahr 2016
Department UBT;
Band/Volume 102
Sprache englisch;
POF III (gesamt) T41;
Keywords Constructed wetlands; Bacterial sulfate reduction; Sulfur oxidation; Denitrification; Plant litter
UFZ Querschnittsthemen RU3;
Abstract Sulfate in effluent is a challenging issue for wastewater reuse around the world. In this study, sulfur (S) removal and transformation in five batch constructed wetlands (CWs) treating secondary effluent were investigated. The results showed that the presence of the plant cattail (Typha latifolia) had little effect on sulfate removal, while the carbon-rich litter it generated greatly improved sulfate removal, but with limited sulfide accumulation in the pore-water. After sulfate removal, most of the S was deposited with the valence states S (-II) and S (0) on the iron-rich gravel surface, and acid volatile sulfide was the main S sink in the litter-added CWs. High-throughput pyrosequencing revealed that sulfate-reducing bacteria (i.e. Desulfobacter) and sulfide-oxidizing bacteria (i.e. Thiobacillus) were dominant in the litter-added CWs, which led to a sustainable S cycle between sulfate and sulfide. Overall, this study suggests that recycling plant litter and iron-rich filling material in CWs gives an opportunity to utilize the S in the wastewater as both an electron acceptor for sulfate reduction and as an electron donor for nitrate reduction coupled with sulfide oxidation. This leads to the simultaneous removal of sulfate, nitrate, and organics without discharging toxic sulfide into the receiving water body.
ID 17833
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=17833
Chen, Y., Wen, Y., Zhou, Q., Huang, J., Vymazal, J., Kuschk, P. (2016):
Sulfate removal and sulfur transformation in constructed wetlands: The roles of filling material and plant biomass
Water Res. 102 , 572 - 581