Waste water treatment plants
SANDE Y DÍAZ offers all the solutions in terms of pre-treatment, primary, secondary and tertiary treatments, and sludge thickening, digestion and dehydration to provide a comprehensive service in urban wastewater treatment plants
Pretreatments
Bar screening, straining, grit removal or grease removal
A pre-treatment is necessary in order to condition wastewater for subsequent treatment, as well as to protect equipment and pipelines against blockages and obstructions caused by solid waste, sand and grease. The following constitute pre-treatment operations that can appear in a water treatment plant
Coarse screening
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We are well aware that success of a treatment plant depends on a thorough and functional pretreatment, which facilitates purification in the following stages
Manual bar screen with rake
Automatic circular bar screen
Automatic straight bar screen
Sieve screw
Rotary sieve
Sand separator
Fat concentrator
Dissolved air flotation
Primary, secondary and tertiary treatments
Physical, biological and chemical procedures
Physical-chemical treatment
Technologies
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Wastewater treatment uses chemical and physical processes to solve specific problems
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Solids separation through sedimentation
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Clarification
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Flocculant and coagulant procedures
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Neutralization to adjust the pH value
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Oxidation processes to remove difficult biodegradable compounds
Biological treatment
Technologies
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Biological wastewater treatment is an economical means of removing organic contaminants from wastewater
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Aerobic systems
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Anaerobic biological treatments
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Coarse and fine bubble diffused aeration systems
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Sequence Batch Reactor processes (SBR)
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Rotating Biological Contactors (RBC) Systems or fixed biomass processes
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Membrane technology systems (MBR)
Tertiary treatment
Technologies
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It affords the peace of mind of knowing that the treated wastewater is clean, sanitary, compliant with regulations and safe enoughr
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Sand and activated carbon filters
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Disinfecting by chlorine or ultraviolet light treatment
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Lagoon storage
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Biological nutrient removal
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Nitrogen and phosphorus removal
Sludge treatment
Thickening, digestion and dehydration
We have all the necessary equipment for the treatment of sludge in a WWTP, from aboveground or buried sludge thickeners to decanter centrifugues, polymer preparation units or centrifugal separators