Nyob rau hauv cov txheej txheem ntawm stacking thiab landfill, ib hom kua uas muaj siab concentration ntawm organic los yog inorganic Cheebtsam yog tsim nyob rau hauv qhov kev txiav txim ntawm nag lossis daus thiab dej hauv av seepage vim biochemical degradation teebmeem xws li compaction thiab fermentation, uas yog hu ua landfill percolate los yog percolate. Muaj ntau yam cuam tshuam rau percolate ntau lawm, suav nrog qhov xwm txheej los nag hauv thaj chaw pov tseg, qhov xwm txheej thiab muaj pes tsawg leeg ntawm cov khib nyiab, kev tiv thaiv kev tawm tsam ntawm qhov chaw pov tseg, thiab hydro-geological tej yam kev mob ntawm qhov chaw.
Landfill percolate muaj cov dej tsis zoo thiab muaj ntau yam tshuaj lom thiab teeb meem inorganic thiab organic. percolate kuj muaj cov tsis muaj chlorinated aromatic tebchaw xws li naphthalene thiab phenanthrene, chlorinated aromatic compounds, phosphoric acid vinegar, phenolic tebchaw thiab aniline tebchaw uas nyuaj rau biodegrade.
Qhov siab tshaj plaws ntawm CODcr thiab BOD5 nyob rau hauv qhov chaw pov tseg percolate tuaj yeem ncav cuag ntau txhiab mus rau kaum tawm txhiab, uas yog ntau dua li cov dej phwj hauv nroog. Yog li ntawd, percolate tsis tuaj yeem tso ncaj qha rau hauv cov kav dej phwj tuaj hauv nroog yam tsis muaj kev kho mob nruj thiab pov tseg. Feem ntau, CODcr, BOD5, BOD5 / CODcr txo qis nrog "hnub nyoog" ntawm qhov chaw pov tseg, thiab cov ntsiab lus alkalinity nce.
