Hazardous and non-hazardous liquid disposal: wastewater treatment
Wastewater treatment section consists of the following: solid separation, preliminary storage, preliminary grouping, chemical/physical treatment and treated water final temporary storage.
The pretreatment section has the aim to eliminate abrasive particles, large dimensions solids and sands that can’t be sent to the following treatments.
The accumulation section consists of six tanks, in which are stored the following waste groups: wastewater containing organic substances, wastewater containing suspended solids, painting waters, washing waters, wastewater containing heavy metals, wastewater containing solvents, wastewater containing cyanides, wastewater containing Cr (VI), landfill leachates, wastewater containing ammonia, exhausted acid solutions, exhausted alkaline solutions.
The equalization section receives the slurry from the preliminary storage tanks, for the subsequent transmission to the chemical-physical treatment section.
The chemical/physical treatment includes the following processes: oxidation/reduction reactor (dosing of oxidizing or reducing agents), coagulation and flocculation reactor (coagulant agents), flocculation (clarifier plate packs), sand filtration, active carbon filtration, reverse osmosis and evaporation.
The treated water is stored in the storage tanks and from there they are sent to the sewage system.
According with its origins and chemical-physical characteristics, each type of wastewater is preliminary checked at Ecotec Research Center, with the purpose of determining the best treatment process, the most suitable reagents to use and their relative dosage.