Direct filtration without a clarification stage
Concrete Wastewater
Wash-water recovery
Recovery of dewatered cement cakes
Water and sludge treatment systems for concrete batching plants
From the collection tank to the filter press, we design water and sludge treatment plants for the concrete sector. By eliminating the settling stage — to prevent the material from hardening inside the plant — our solutions recover the wash water and rapidly dewater the cement sludge, supporting its direct reuse in the production cycle.
Managing cement and the risks of conventional clarification
Washing concrete mixer trucks and batching plants generates large volumes of water laden with cement and fine aggregates. The main challenge lies in the nature of the material itself. Cement is a reactive material: if left to settle slowly inside a conventional clarifier, it can set — causing hardening and blockages within the plant.
For this reason, the Tecnoidea solution is based on a simplified process layout: a direct line that keeps the material continuously agitated and then dewaters it as quickly as possible.
The Tecnoidea solution
The concrete-wastewater treatment process
Coarse screening and agitated collection
After an initial removal of the coarse aggregates (using recovery screws or Beton Wash systems), the water laden with cement fines flows into a dedicated collection tank. This tank is fitted with high-capacity agitators that keep the solids continuously suspended, preventing the risk of hardening.
Direct transfer to the filter press
At this stage, the process excludes static settling tanks and flocculant dosing units. Abrasion-resistant centrifugal pumps draw the turbid water directly from the agitated tank and feed it straight into the filter press, with no intermediate treatment stages, reducing idle time and the risk of sedimentation.
Rapid dewatering
Taking advantage of the natural filterability of the cement sludge, the filter press carries out rapid mechanical solid-liquid separation. Compression produces dewatered solid cakes in a short time: a full filtration cycle is completed on average in about 15–30 minutes, supporting continuous batching-plant operation.
Water and solids recovery
The filtrate leaving the filter press is collected and returned by a process pump, ready to be fed back into the production cycle. The dewatered cement cakes discharged from the filter press are also typically reused in casting applications and in the production of non-structural building blocks.
Products, plants and technologies for concrete-wastewater treatment
Plants and solutions designed to recover wash water and enable reuse of the dewatered solids.
Disidratazione fanghi
La disidratazione meccanica rappresenta la fase più importante nella gestione dei fanghi di processo. Attraverso una filtrazione ad alta pressione,...
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Agitatore fanghi
L’agitatore fanghi è l’unità installata all’interno delle vasche dell’impianto con la funzione di omogeneizzare i fanghi. La sua azione previene...
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Vasca dell’acqua torbida
La vasca (o pozzo) dell’acqua torbida è la prima unità di processo che riceve l’acqua dell’impianto di lavaggio carica di...
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Filtropressa a trave alta
È la macchina progettata per la disidratazione meccanica dei fanghi nel caso di grandi produzioni. Separa l’acqua dal fango e...
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Pompaggio acque e fanghi
Il sistema di pompaggio interviene nel trasferimento di acque torbide e fanghi ad alta densità tra le diverse sezioni dell’impianto....
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Vertical abrasion-resistant pump
Tecnoidea’s vertical centrifugal pumps are designed to handle turbid water, sludge and abrasive mixtures directly from collection tanks. The motor...
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Sidebar filter press
Designed for the mechanical dewatering of sludge in standard and medium-output applications (with a capacity of up to around 3.3...
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Contact usWhy choose Tecnoidea for concrete-wastewater treatment
Specialist expertise in water and sludge management
For over 45 years we have designed plants for water treatment and sludge dewatering. In the concrete sector, our choice to eliminate the settling stage lets us treat the cement wastewater while reducing the risk of material solidification in the tanks and subsequent plant blockages.
Closed loop
We design our water and sludge treatment solutions to integrate with the batching plant, recovering the wash water, which is fed back directly as mixing water. In addition, mechanical sludge dewatering recovers the solid fraction as pressed cakes, well suited to producing non-structural building blocks.
Operational continuity
Operational continuity is critical in concrete batching plants, which cannot afford downtime caused by an inefficient washing system. Our solutions — from high-pressure abrasion-resistant pumps to continuously agitated tanks — are sized and built to withstand the wear caused by fine aggregates.
45
Years of experiencein water and sludge treatment
90
Water and sludge treatment plantsin the concrete-wastewater sector
64
Containerised plants
References
Swiss
Sector Concrete Wastewater
Material treated Concrete
Ase Technik
Sustainability and Efficiency in Concrete-Wastewater Treatment
Read the case study
Swiss
Sector Concrete Wastewater
Material treated Concrete
Vigier Beton
Compact containerised plants for treating concrete wastewater
Read the case study
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