Liquid and sludge treatment

Systems for sludge disposal and reuse in Pontassieve

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Liquid treatment phases

Sludge and liquid treatment occurs via a series of basic operations:

thickening to increase the dry matter and reduce the volumes requiring treatment
biological stabilization to mineralize part of the organic substances subject to decomposition, thereby eliminating pathogenic bacteria and parasites
conditioning to weaken the bonds between water and solid particles, thereby facilitating their release
dehydration and drying to eliminate most of the water present in the stabilized sludge
incineration or compaction for the final disposal of the sludge

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Types of industrial sludge

Various types of sludge are generated by traditional sewage treatment plants:

primary sludge: deriving from the primary sedimentation process, this consists of fresh organic substances that separate from the raw slurry without any treatment. This type of sludge degrades more rapidly and anaerobically than other types of sludge and produces more biogas.
secondary, biological or active sludges deriving from biological oxidation processes (trickling filters or excess sludge from activated sludge plants). The resulting flocs have a lower percentage of solids than primary sludges but are richer in nitrogen and phosphorus.
chemical sludge deriving from clariflocculation processes

Combined sludge — primary and secondary sludge — generally comes into the sludge line with a high humidity, equal to 96–99%. This liquid must be removed from the sludge prior to final disposal, reducing environmental damage and costs.

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Industrial water-purification systems

The liquid- and sludge-treatment systems we produce at CDT Centro Depurazione Toscano are designed to guarantee the best results for all types of sludge (primary, secondary and chemical) and any combination thereof. With special liquid filters, environmental damage is minimized and disposal costs are reduced.

Our attention to constant technological innovation and careful selection of the best materials are defining characteristics of our company and products. To learn more or request a quote, do not hesitate to contact us. A specialized technician will answer all your questions and explain the characteristics of each system.

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