1. initial treatment (Preliminary Treatment)As a treatment for solid fat or organic waste water from large to await disposal and preparation steps, as appropriate for the waste water treatment in the next stage.
1. Pretreatment (Preliminary Treatment) as therapy for separating solid fat or large organic compounds from wastewater for disposal. And a process for preparing a proper sewage treatment in the next step.
1. Primary treatment (Preliminary Treatment) therapy to separate fat, solids, or organic wastewater for large out of removal. And the preparation process for wastewater treatment in the next .