Recycled clay bricks and palm kernel shell as constructed wetland substrate for wastewater treatment: An engineered closed circuit circular economy approach

Obeng, Ernest; Essandoh, Helen Michelle Korkor; Akodwaa-Boadi, Kofi; Taylor, Theodora Sophia; Kusi, Isaac Osei; Appiah–Effah, Eugene

doi:10.1016/j.eti.2023.103324

Cited by 7 publications

(1 citation statement)

References 27 publications

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“…The present experiment revealed that the elimination of TSS in CW2 was significantly higher than in CW3, attributed to the porous structure of the bricks. Obeng et al (2023) also found that clay bricks effectively eliminated TSS from wastewater. While bricks are crucial for eliminating TSS, the findings from CW3 suggest that Lemna minor L. can also remove TSS from wastewater.…”

Section: Discussionmentioning

confidence: 89%

Composition of the microbial community in surface flow-constructed wetlands for wastewater treatment

Ali,

Min,

et al. 2024

Front. Microbiol.

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Traditionally constructed wetlands face significant limitations in treating tailwater from wastewater treatment plants, especially those associated with sugar mills. However, the advent of novel modified surface flow constructed wetlands offer a promising solution. This study aimed to assess the microbial community composition and compare the efficiencies of contaminant removal across different treatment wetlands: CW1 (Brick rubble, lignite, and Lemna minor L.), CW2 (Brick rubble and lignite), and CW3 (Lemna minor L.). The study also examined the impact of substrate and vegetation on the wetland systems. For a hydraulic retention time of 7 days, CW1 successfully removed more pollutants than CW2 and CW3. CW1 demonstrated removal rates of 72.19% for biochemical oxygen demand (BOD), 74.82% for chemical oxygen demand (COD), 79.62% for NH4+-N, 77.84% for NO3−-N, 87.73% for ortho phosphorous (OP), 78% for total dissolved solids (TDS), 74.1% for total nitrogen (TN), 81.07% for total phosphorous (TP), and 72.90% for total suspended solids (TSS). Furthermore, high-throughput sequencing analysis of the 16S rRNA gene revealed that CW1 exhibited elevated Chao1, Shannon, and Simpson indices, with values of 1324.46, 8.8172, and 0.9941, respectively. The most common bacterial species in the wetland system were Proteobacteria, Spirochaetota, Bacteroidota, Desulfobacterota, and Chloroflexi. The denitrifying bacterial class Rhodobacteriaceae also had the highest content ratio within the wetland system. These results confirm that CW1 significantly improves the performance of water filtration. Therefore, this research provides valuable insights for wastewater treatment facilities aiming to incorporate surface flow-constructed wetland tailwater enhancement initiatives.

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Section: Discussionmentioning

confidence: 89%