The purpose of this study is to determine the impact of leachate recirculation on stabilisation of  municipal  solid  wastes.  The  study  was  carried  out  by  using  two  lab­  scale  landfill bioreactors  containing  approximately  10  kg  of  waste  each,  in  order  to  follow  waste
degradation  over  16  weeks  of  time  period.  The  main  difference  between  anaerobic recirculated  and  without  recirculation  bioreactors  options  is  determined  in  leachate  quality. Leachate quality is regularly measured by the means of pH, electrical conductivity, calcium,
magnesium,  total  kjeldahl  nitrogen,  phosphate  and  chemical  oxygen  demand  (COD).  It  has been observed that leachate recirculation is more effective on anaerobic degradation of solid waste  than  non­recirculated  degradation.  The  leachate  recirculated  bioreactor  appears  to  be
the more effective option in the removal of COD by 89.93% and stabilisation of pH at 7.5. After 16 weeks of anaerobic degradation, waste stabilization seemed to have reached for the recirculated  bioreactor.  Therefore,  further  studies  required  to  determine  the  optimum
operational  conditions  for  leachate  recirculation  rates,  also  with  the  operational  costs  of recirculation for solid waste stabilisation.