An innovative reuse of bottom ash from municipal solid waste incinerators as substrates of constructed wetlands

Chyan, Jih Ming; Lin, Chien Jung; Yu, Mu Jin; Shiu, Ruei-Feng; Huang, D.H.; Lin, Chien Sa; Senoro, Delia B.

doi:10.1016/j.chemosphere.2022.135896

Cited by 5 publications

(1 citation statement)

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“…The NO − 3 -N produced by nitrification needs to be removed by the denitrification process, which is the last step of nitrogen removal. The denitrification process is often limited by the carbon source and the lack of electron donors, which eventually leads to the accumulation of NO − 3 -N and inhibits the removal of TN [12,13]. Figure 2 shows the removal effects of CWs with different matrix fillers on NH + 4 -N, NO − 3 -N and TN, and the results indicate that all CWs have certain removal effects on nitrogen pollutants.…”

Section: Effect Of Constructed Wetland Wastewater Treatment With Diff...mentioning

confidence: 99%

Study on the Effectiveness of Constructed Wetlands in Purifying Polluted Water from Rivers and Greenhouse Gas Emissions

Zhu,

Sun,

Zhang

et al. 2023

SPEE

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In order to investigate the effect of different substrates of constructed wetlands on the purification of polluted water in rivers and their greenhouse gas emissions, this study designed three small-scale constructed wetland experimental systems with traditional gravel (CW-G), volcanic rock (CW-V) and biomass carbon (CW-B) as filler substrates to investigate the effect of different constructed wetland systems on the removal of COD and nitrogen pollutants and to further analyse their effect on greenhouse gas emissions. The results showed that the removal rates of organic matter in all three groups of constructed wetlands reached over 90%. and 49.29% to 58.71%, respectively, with CW-V and CW-B significantly improving the removal of NH4 + -N and NO3− -N compared to CW-G (P < 0.05). A comparison of greenhouse gas emissions reveals that although CW-B resulted in the highest N2O emissions due to its better removal of NO3− -N, its share in nitrogen removal was still the smallest. In addition, the rapid consumption of organic matter in the influent water and the oxidation of some CH4 to CO2 resulted in no detectable CH4 in any of the three groups of constructed wetlands. The results of this study show that the differences in treatment effects and greenhouse gas emissions between the three types of substrate constructed wetlands are significant, and this study can provide some scientific reference for the construction and operation of wetlands for the purification of polluted water bodies in rivers.

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Section: Effect Of Constructed Wetland Wastewater Treatment With Diff...mentioning

confidence: 99%