Metsi a silafetseng (litšila) a ntšitsoeng mohloling oa tšilafalo, ka lebaka la palo e phahameng ea kakaretso kapa bongata ba litšila, ha a fihlelle litlhoko tsa litekanyetso tsa ho qhala kapa ha a fihlelle litlhoko tsa matla a tikoloho, ka hona a fokotsa boleng ba metsi a tikoloho le lipheo tsa ts'ebetso. , e tlameha ho ntlafatsoa ka tsela ea maiketsetso.Ts'ebetsong ea ho hloekisa likhoerekhoere, matšoao a lokelang ho behoa leihlo a kenyelletsa ammonia nitrogen, phosphorus kakaretso, naetrojene eohle, COD, pH, oksijene e qhibilihisitsoeng, le tlhokahalo ea oksijene ea biochemical.