Decomposition of toxic pollutants in landfill leachate by ozone after coagulation treatment

Characterization of Leachate from Kuala Sepetang and Kulim Landfills: A Comparative Study

“…Generally, the pH of a stabilized leachate is higher than that of a young leachate. The difference could be due to the stabilized leachate that is produced after or during the fermentation of methane; hence the pH is higher than 7.5 (Poznyak et al, 2003). The pH values remained within the permissible limit (6.0-9.0) set in the Environmental Quality (Control of Pollution from Solid Waste Transfer Station and Landfill) Regulations 2009, Malaysian Environmental Quality Act 1974 (Act 127) Aghamohammadi et al, 2007;Aziz et al, 2007).…”

Sustainable treatment of landfill leachate

“…The statistical analysis suggested that the optimum operating conditions for coagulation and DAF were 599.22 mg/L of FeCl 3 at pH 4.76 followed by saturator pressure of 600 kPa, flow rate of 6 L/min and injection time of 101 min. In another work, Poznyak et al (2008) injected ozone process after the coagulation/flocculation treatment. They found that coagulation/flocculation injected ozone could remove 70 % of humic substances in leachate.…”

Remediation of lignin and its derivatives from pulp and paper industry wastewater by the combination of chemical precipitation and ozonation

“…In this study the decoloration rate constants were estimated realizing the numerical calculations based on the simplified mathematical model, which have been used in the previous investigation [45,49,50] for the kinetic constants calculation, using the gas phase ozone concentration variation in the reactor outlet and the lignin decoloration dynamics. The differential neural networks (DNN) approach can be used to estimate on-line the ozonation kinetic parameters by the analytical analysis described Table 3 Variation of COD, BOD5 and biodegradability (BOD5/COD) of treated water during ozonation.…”