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Preliminary storage and physiochemical treatment platform in Ferrara

Via C.Diana 32, Ferrara

  • 1 / 1   Preliminary storage and physiochemical treatment platform in Ferrara

Company "HERAMBIENTE SERVIZI INDUSTRIALI SRL"

Covering a surface area of 11,240 m2, the preliminary storage and physicochemical treatment platform for hazardous and non-hazardous special waste consists of one facility for solid waste (covered storage facility and container storage area) and a second liquid waste storage and treatment facility (storage tanks, physicochemical plant, mechanical dehydration plant, sludge storage).

Established based on the First Regional Plan on the Organisation of Waste Disposal Services and approved by the Regional Council on 23/02/1988, the platform has an integrated hazardous and non-hazardous waste collection and pre-treatment system capable of providing emergency management services in the regional area.

Page updated 26 August 2015

 
    Waste treatment capacity
    • 40,500 tonnes/year of hazardous and non-hazardous waste (physicochemical treatment)
    • 1,050 tonnes at any one time for preliminary storage and storage of solid waste
    Types of waste accepted
    • hazardous and non-hazardous special solid waste
    • hazardous and non-hazardous special liquid and pumpable sludge waste

    Integrated solid/liquid waste storage method

    • facility for waste storage in big bags and drums with a simultaneous storage limit of 650 tonnes;
    • special watertight tanks inside the facility;
    • 15 tanks with a total instantaneous capacity of 450 m≥;
    • suitable covered containers in an outside yard with a simultaneous storage limit of 400 tonnes.

    Treatment lines

    • physicochemical treatment;
    • filter press.

    Layout of the physicochemical treatment line

    • mixing of wastewater to be treated;
    • neutralisation/precipitation of metals in an alkaline environment with sodium hydroxide and calcium hydroxide solution;
    • clarification/flocculation with flocculating agents (ferric chloride);
    • precipitation with the addition of anionic polyelectrolytes;
    • static sedimentation for phase separation;
    • drum filter for the retention of suspended solids.

    Filter press

    • filter pressing with the addition of milk of lime to improve dehydration;
    • transfer of filter pressed sludge to containers.

    All wastewater flows into the centralised pre-treatment tank for an initial mixing phase. This is followed by neutralisation, then flocculation. The overflow is transferred to a mechanised clarifier. The clarified matter leaving the sedimentation tank is transferred to a drum filter to remove the final remaining suspended solids. The sludge leaving the sedimentation tank is stored in two static thickeners. From there, it is sent to a filter press in which it is dehydrated further before external disposal. The physicochemical plant drainage flows into a container that collects the waters of the industrial zone where the plant is located, connected to the municipal blackwater system which goes to the Ferrara purification plant.

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