Effect of passive ventilation on the performance of unplanted sludge treatment wetlands: heavy metal removal and microbial community variation
- 4 June 2020
- journal article
- research article
- Published by Springer Science and Business Media LLC in Environmental Science and Pollution Research
- Vol. 27 (25), 31665-31676
- https://doi.org/10.1007/s11356-020-09288-w
Abstract
Sludge treatment wetlands (STWs) have been applied worldwide to treat excess sludge; however, the performance of STWs is generally limited by weather partly due to the plants vegetated on the STWs. In this study, ventilation is suggested to assist unvegetated STWs. Solid samples from different depths were analysed. Additionally, the variation of microbial community in STW unit was analysed and the fate of heavy metals in the sludge was determined. Results indicate that the STW unit with suitable parameters has better performance in stabilising and maturing the sludge than planted STW, which may contribute to the variation of the microbial community; additionally, ventilation exerts a positive influence on these bacteria during the variation of microbial community and on heavy metal removal through the substrate and positively impacts the Cd and Pb in reduction state. Furthermore, ventilation decreases the bioavailability of Cr. With ventilation in STWs, Bacillus and Streptomyces play a necessary role in enhancing the possibility of sludge to be used as microbial inoculants.Funding Information
- National Key Research and Development Program of China (2019YFD1100203)
This publication has 81 references indexed in Scilit:
- Heavy metals distribution and their bioavailability in earthworm assistant sludge treatment wetlandJournal of Hazardous Materials, 2018
- The selective pressures on the microbial community in a metal-contaminated aquiferThe ISME Journal, 2018
- Bacterial community composition and diversity uncovered in experimental sludge treatment reed bed systems with different swine slurry hydraulic loadingsEcological Engineering, 2018
- Microbiota-activated PPAR-γ signaling inhibits dysbiotic Enterobacteriaceae expansionScience, 2017
- Transformation of Chloroform in Model Treatment Wetlands: From Mass Balance to Microbial AnalysisEnvironmental Science & Technology, 2015
- Habitat degradation impacts black howler monkey (Alouatta pigra) gastrointestinal microbiomesThe ISME Journal, 2013
- Removal of personal care compounds from sewage sludge in reed bed container (lysimeter) studies — Effects of macrophytesScience of The Total Environment, 2009
- Personal care compounds in a reed bed sludge treatment systemChemosphere, 2009
- Plant–microbe interactions promoting plant growth and health: perspectives for controlled use of microorganisms in agricultureApplied Microbiology and Biotechnology, 2009
- Solids accumulation in six full-scale subsurface flow constructed wetlandsWater Research, 2007