Constructed wetland modified by biochar/zeolite addition for enhanced wastewater treatment

Sammanfattning

Wastewater treatment for water reuse has received considerable attention owing to water resource shortage. One of the most effective wastewater treatment methods involves the use of constructed wetlands (CWs). In this study, synthetic wastewater was treated by using a biochar/zeolite CW. Phragmites australis (common reed) was translocated into two cylinders (lysimeters) that serve as vertical subsurface flow CWs. One CW (CW1) contained gravels as substrate layer, whereas the other CW (CW2) contained three substrate layers, namely, biochar, zeolite, and gravel layers. Response surface methodology was used for statistical analysis. In this study, CW2 performed better in removing pollutants from wastewater than CW1. At optimum pH (6.3) and retention time (57.4 h), 99.9% (1000 mg/L) COD, 99.9% (1000 mg/L) ammonia, 99.9% (50 mg/L) phenols, 99.9% (50 mg/L) Pb, and 99.9% (50 mg/L) Mn were removed by CW2. During this research, nitrous oxide emission was lower in CW2 than in CW1. (C) 2019 Elsevier B.V. All rights reserved.

Nyckelord

Biochar; Constructed wetland; Phragmites australis; Wastewater treatment; Zeolite

Publicerad i

Environmental technology & innovation
2019, volym: 16, artikelnummer: 100472
Utgivare: ELSEVIER

SLU författare

• Abedi, Tayebeh

  • Institutionen för skoglig genetik och växtfysiologi, Sveriges lantbruksuniversitet
    

Globala målen (SDG)

SDG6 Rent vatten och sanitet för alla
SDG12 Hållbar konsumtion och produktion

UKÄ forskningsämne

Vattenbehandlingsbioteknik

Publikationens identifierare

• DOI: https://doi.org/10.1016/j.eti.2019.100472

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/103211