TY - JOUR
TI - Impact assessment of concentrate recirculation on the landfill gas production
AU - Džolev Nikola M
AU - Vujić Goran V
JN - Thermal Science
PY - 2016
VL - 20
IS - 4
SP - 1283
EP - 1294
PT - Article
AB - This paper explores the impact of concentrate recirculation, as a product of  leachate treated by reverse osmosis plant, on the production of landfill gas  at the real-scale landfill for municipal solid waste. In an effort to come up  with results experimental measurements were carried out at the landfill in  Bijeljina. All measurements performed, were divided into 3 groups. The aims  of two groups of measurement were to determine landfill gas and methane yield  from concentrate and leachate in laboratory conditions (1st group) and to  find out concentrations of oxidizing matters (COD and BOD5) present in  leachate and concentrate at different points of treatment as well as its  variability over the time (2nd group) which could be used to calculate the  potential of landfill gas and methane generation from concentrate by  recirculation, theoretically. 3rd group of measurements, carried out in  parallel, have goal to determine the quality and quantity of the collected  landfill gas at wells throughout the landfill. The results of analysis  carried out in this experimental research show the clear evidence of  concentrate recirculation impact on methane production by increasing the  landfill gas flow, as well as its concentration within the landfill gas  composition, at the nearby well. Although results indicated relatively high  impact of concentrate recirculation on landfill gas production, comparing to  its theoretical potential, the influence on the landfill at whole, is  negligible, due to relatively low volumes in recirculation with respect to  its size and objectively low potential given by organic matter present in  concentrate.