Influence Factors in Clogging of Landfill Leachate Collection System

A common failure mode for landfills is clogging of the leachate collection system. Based on the studies of clogging about landfill leachate collection system, the influence factors about clog were comprehensively and systematically analyzed .The results show that calcium is the dominant mineral of the dry mass of clog material, and CaCO3 is the main component of the clog. The growth of biomass, minerals precipitation and deposition of suspend inorganic particles are the three major mechanisms for the clogging of LCSs. However, the clogging rate and extend of LCSs is affected by particle size of the granular media, pipe spacing and pipe diameter, filter-separator layer, mass loading, saturated or unsaturated conditions and temperature. These conclusions have profound guiding significance for the design and operation of landfill leachate collection system.