Evaluation of the Treatment Process of Landfill Leachate Using the Toxicity Assessment Method

Aifeng Qiu, Qiang Cai, Yuan Zhao, Yingqing Guo and Liqian Zhao
Additional contact information
Aifeng Qiu: School of Environmental and Safety Engineering, Changzhou University, No. 1 GeHu Road, Wujin District, Changzhou 213164, Jiangsu, China
Qiang Cai: Yangtze Delta Region Institute of Tsinghua University, No. 705, Yatai Road, Nanhu District, Jiaxing 314006, Zhejiang, China
Yuan Zhao: School of Environmental and Safety Engineering, Changzhou University, No. 1 GeHu Road, Wujin District, Changzhou 213164, Jiangsu, China
Yingqing Guo: School of Environmental and Safety Engineering, Changzhou University, No. 1 GeHu Road, Wujin District, Changzhou 213164, Jiangsu, China
Liqian Zhao: Yangtze Delta Region Institute of Tsinghua University, No. 705, Yatai Road, Nanhu District, Jiaxing 314006, Zhejiang, China

IJERPH, 2016, vol. 13, issue 12, 1-16

Abstract: Landfill leachate is composed of a complex composition with strong biological toxicity. The combined treatment process of coagulation and sedimentation, anaerobics, electrolysis, and aerobics was set up to treat landfill leachate. This paper explores the effect of different operational parameters of coagulation and sedimentation tanks and electrolytic cells, while investigating the combined process for the removal efficiency of physicochemical indices after processing the landfill leachate. Meanwhile, a battery of toxicity tests with Vibrio fischeri , zebrafish larvae, and embryos were conducted to evaluate acute toxicity and calculated the toxicity reduction efficiency after each treatment process. The combined treatment process resulted in a 100% removal efficiency of Cu, Cd and Zn, and a 93.50% and an 87.44% removal efficiency of Ni and Cr, respectively. The overall removal efficiency of chemical oxygen demand (COD), ammonium nitrogen (NH 4 + -N), and total nitrogen (TN) were 93.57%, 97.46% and 73.60%, respectively. In addition, toxicity test results showed that the acute toxicity of landfill leachate had also been reduced significantly: toxicity units (TU) decreased from 84.75 to 12.00 for zebrafish larvae, from 82.64 to 10.55 for zebrafish embryos, and from 3.41 to 0.63 for Vibrio fischeri . The combined treatment process was proved to be an efficient treatment method to remove heavy metals, COD, NH 4 + -N, and acute bio-toxicity of landfill leachate.

Keywords: landfill leachate; electrolytic biological filter; Vibrio fischeri; zebrafish larvae; zebrafish embryos; toxicity reduction (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2016
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.mdpi.com/1660-4601/13/12/1262/pdf (application/pdf)
https://www.mdpi.com/1660-4601/13/12/1262/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jijerp:v:13:y:2016:i:12:p:1262-:d:85710

Access Statistics for this article

IJERPH is currently edited by Ms. Jenna Liu

More articles in IJERPH from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().