Biodegradation of organics in landfill leachate by immobilized white rot fungi,Trametes versicolorBCC 8725

Abstract

Immobilized Trametes versicolor BCC 8725 was evaluated for the biodegradation of the organic components of four different types of landfill leachate collected at different time periods and locations from the Nonthaburi landfill site of Thailand in batch treatment. The effects of carbon source, ammonia and organic loading on colour, biochemical oxygen demand (BOD) and chemical oxygen demand (COD) removal, and the reuse of immobilized fungi were investigated. It was found that fungi can remove 78% of colour, reduce BOD by 68% and reduce COD by 57% in leachate within 15 days at optimum conditions. Organic loading and ammonia were the factors that affected the biodegradation. When immobilized T versicolor on polyurethane foam (PUF) was subjected to repeated use for treatment over the course of three cycles, the decolourization efficiency of the first and the second cycle was very similar, whereas the third cycle was about 20% lower than the first cycle under similar conditions. The obtained removal of colour, BOD and COD indicates the effectiveness of fungi for leachate treatment with high organic loading and varied leachate characteristics.

Bioremediation of Landfill Leachate with Fungi: Autochthonous vs. Allochthonous Strains

“…In the recent literature, different basidiomycota (e.g., Trametes versicolor , Dichomitus squalens , Trametes menziesii , Ganoderma australe ) have been investigated for landfill decolorization and detoxification with the involvement of oxidative enzymes [ 10 , 42 , 43 , 44 ]. The results are not always comparable since, sometimes, different parameters were monitored (COD and BOD instead of color and toxicity, phenolic content).…”

Biosorption with autochthonous and allochthonous fungal biomasses for bioremediation and detoxification of landfill leachate

“…(Schiopu and Gravrilescu, 2010). Although some physical and chemical methods are effective in the removal of high strength pollutants, the high cost per volume unit is their major drawback (Bareither et al 2013; Saetang and Babel, 2012).…”

Sustainable treatment of landfill leachate

“…The biological process showed that immobilized microorganisms system was effective for the removal of COD and nitrogen at 98.3 and 99.9 %, respectively. A study done by Saetang and Babel (2012) revealed that Trametes versicolor BCC 8725 could remove 78 color, 68 BOD 5 and 57 % COD from leachate sample within 15 days at optimum condition, respectively. They also claimed that organic loading and ammonia were the factors that affected the biodegradation.…”