Ihirangi hanga: Tango puehu tiaki Taiao me te pūnaha deodorization mo te raina granulation wai, kararehe me te aho granulation heihei, ultra-pai paura kuru raina me te roha raina; 120t pūnaha maimoatanga para paru.
Ko te tikanga matua: Te tango i te puehu o te pupuhi + te rere rehu ki runga ki te paerewa
