Application of integrated sequence of air stripping, coagulation flocculation, electrocoagulation and adsorption for sustainable treatment of municipal landfill leachate

Operational variable effect on the COD removal efficiency using electrocoagulation in landfill leachate treatment

“…44 Likewise, De et al provided that, under optimized conditions, a 51.9% reduction of COD was achieved at a current density of 3.13 mA cm −2 and an electrolysis time of 24.8 min. 45 According to the above, it is evident that there is a wide variety of operational parameters used in EC systems; the optimum values seemed to depend on the studied system. Hence, the quality of the treated leachate would play a crucial role in the efficiency of the EC process.…”

Development of Hybrid Systems by Integrating an Adsorption Process with Natural Zeolite and/or Palygorskite into the Electrocoagulation Treatment of Sanitary Landfill Leachate

“…The focus of the authors was to remove the disinfection by-products (DBPs) potentially formed during EC treatment of landfill leachates; however, they also evaluated COD removal after four hours of adsorption, which was enhanced from 21.8 ± 1.4% to 45.5 ± 4.2%. De et al [58] studied an integrated multistage approach (air stripping, coagulation-flocculation, electrocoagulation and adsorption) comprising a batch EC reactor with four Fe electrodes and an adsorption column packed with chitosan beads in series to treat raw landfill leachate. The overall removals of NH 4 + -N, BOD 5 , COD and Hg achieved were 96.87%, 95.97%, 90.23% and 99.93%, respectively.…”