Composting plant leachate treatment by a pilot-scale, three-stage, horizontal flow constructed wetland in central Iran

Reza Bakhshoodeh, Nadali Alavi, Pooya Paydary

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

Handling and treatment of composting leachate is difficult and poses major burdens on composting facilities. The main goal of this study was to evaluate usage of a three-stage, constructed wetland to treat leachate produced in Isfahan composting facility. A pilot-scale, three-stage, subsurface, horizontal flow constructed wetland, planted with vetiver with a flow rate of 24 L/day and a 15-day hydraulic retention time, was used. Removal of organic matter, ammonia, nitrate, total nitrogen, suspended solids, and several heavy metals from Isfahan composting facility leachate was monitored over a 3-month period. Constructed wetland system was capable of efficiently removing BOD5 (87.3%), COD (74.5%), ammonia (91.5%), nitrate (87.9%), total nitrogen (87.8%), total suspended solids (85.5%), and heavy metals (ranging from 70 to 90%) from the composting leachate. High contaminant removal efficiencies were achieved, but effluent still failed to meet Iranian standards for treated wastewater. This study shows that although a three-stage horizontal flow constructed wetland planted with vetiver cannot be used alone to treat Isfahan composting facility leachate, but it has the potential to be used as a leachate pre-treatment step, along with another complementary method.

Original languageEnglish
Pages (from-to)23803-23814
Number of pages12
JournalEnvironmental Science and Pollution Research
Volume24
Issue number30
DOIs
Publication statusPublished - 1 Oct 2017
Externally publishedYes

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