Efficiency of two-stage aerobic-reagent technology for the pre-treatment of different age leachates of municipal solid waste landfills

Optimal pre-treatment of moderately old landfill leachate at the pilot-scale treatment plant using the combined aerobic biochemical and reagent method

“…ammonium nitrogen, TKN, COD), as shown in Ref. [ 29 ], can be well described by a two-parameter first-order reaction equation (1) that takes into account the lower limiting concentration С lim , which corresponds to the share of non-biodegradable compounds: d C / d t = – k ( C – C lim ) …”

“…Thus, for mature Hrybovychi leachate, COD and TKN are critical indicators of pollution, which confirms the conclusions drawn in particular by Refs. [ 29 , 42 ], and influence on the duration of aerobic biochemical treatment and fixes the requirements for the efficiency of the second, reagent stage of pre-treatment. Taking into account that the operating costs of aerobic treatment at fixed values of capacity and of aeration intensity are proportional to the square of time, and using the obtained TKN and COD kinetic curves (Eq.…”

“…The systematic studies on the possibilities of application of the Fenton process and its variations, such as photo-Fenton process, electro-Fenton process, were done in last two decades [ 17 , 26 , 27 ]. Effectiveness of leachate treatment from the persistent organic contaminants using a simple or modified Fenton process depends on the type of leachate, reagent dosage, methods of input and mixing the reagents, initial and final pH values, temperature and aeration intensity [ 28 , 29 ].…”

“…In order to reduce the dilution ratio and to increase the degree of reliability of the WWTP performance, lechate should be pre-treated mainly by ammonium nitrogen, TKN, COD and pH. Previous lab-scale studies proved the effectiveness of the combined aerobic-reagent method for the pre-treatment of different age leachates of MSW landfills [ 10 , 29 ]. The main gap, crucial for the implementation of this combined method, is the lack of data on scaling-up this technology, and this is especially relevant for the modified Fenton method.…”