Table 1 Description of stages, variables, and measurement indicators in leachate treatment via chemical precipitation, ammonia stripping, and fenton.

1

Chemical precipitation with lime

Fresh & old

Lime dose, pH,time

Lime dose:3,6,9,12,18 g/l

Volume:5L;

pH recorded every 30 min;

contact time :2 h

BOD₅,COD,BOD₅/COD,

Heavy metals

2

Ammonia stripping

Fresh & old

Aeration time

pH adjusted to 11.5;diferent durations tested; Aeration at optimal time; Supernatant stored at 4⁰ c

NH₃-N

3

Fenton process

Fresh & old

H₂O₂,Fe²⁺,reaction time

500 ml pretreated leachate; pH adjusted to 3; H₂O₂ and FeSO₄-7H₂O add per BBD; Final pH adjusted to 8.5

BOD₅,COD,BOD₅/COD