A new approach for detoxification of landfill leachate using Trametes trogii

Abstract

Landfill leachate constitutes one of the most polluting wastewaters. Their treatment was considered difficult due to the presence of high concentration of organic matter, ammonia, toxic organic compounds and heavy metals. Biological processes were found to be effective in several cases, but they are limited by the presence of inhibitory compounds in leachate. In this study we develop a biological process for the leachate biodetoxification using Trametes trogii (T. trogii; CLBE55). Results show that laccase activity, mycelia growth and chemical oxygen demand (COD) removal efficiencies varied depending on the leachate and ammonium concentration. Indeed T. trogii was able to grow in the presence of low concentration of landfill leachate of 10 and 30%. In fact, the biomass produced was 4.7 and 3.7 g/L, respectively leading to a COD removal of 66 and 53%, respectively. However, when the concentration of the introduced leachate exceeds 30%, the treatment efficiency and particularly the COD removal decreases to reach 15% at 100% leachate. The effect of the ammonia was also studied and results showed that the addition of 5 g/L of ammonia inhibited totally the production of laccase and the COD removal.

Feasibility of stabilizing Cd, Pb, and Ni in MSWI fly ash using leachate as an alternative stabilizer

“…However, secondary pollutants, such as leachate and fly ash, are inevitably generated during MSWI [3]. Leachate usually contains high concentrations of organic matter, inorganic matter and toxic elements [4,5], which have a harmful impact on the ecosystem and the biological chain [6,7], and thus requires proper disposal. Fly ash, which needs harmless treatment before landfill [8], accounts for approximately 2%-5% of the total residue of MSWI and contains toxic pollutants such as heavy metals, soluble salts, and dioxins [9][10][11][12], posing threats to human health and the environment [13].…”

Screening and selection of autochthonous fungi from leachate contaminated-soil for bioremediation of different types of leachate

“…These features make the filamentous fungi good candidates for bioremediation in contaminated effluents [27]. A few studies were carried out using fungi for effective bioremediation of landfill leachates [2,[28][29][30][31]. Most of these studies have focused on non-autochthonous fungi, in particular white rot fungi such as Bjerkandera adusta MUT 2295, Ganoderm australe and Phanerochaete chrysosporium.…”

Assessment of organic matter biodegradation and physico-chemical parameters variation during co-composting of lignocellulosic wastes with Trametes trogii inoculation

“…This enzyme is characterized by a high level of degradation of phenolic and non-phenolic compounds including lignin and many other various pollutants [13]. Due to these decomposition and detoxification properties, this strain has been widely applied in bioremediation including the decolorization of synthetic dyes [14], detoxification of landfill leachate [15] and decontamination of industrial effluents and soil polluted by herbicides and pesticides [16]. Nevertheless, the impact of T. trogii addition during composting has not been previously evaluated.…”