Nantaise des Eaux Ingénierie : Presentation of the different technologies used in municipal wastewater treatment process.

Containerized Units for Wastewater Treatment

NDEI offers a range of containerized units for wastewater treatment. These "products" are mainly designed for the export. Their implementation is quick and simple .Civil works are very simple. The treatment units are movable and reusable.

 

Nantaise des Eaux Ingénierie offers various technologies to adapt to regulation requirements specific to each collectivities.

Nantaise des Eaux Ingénierie manages a wide range of treatment processes to ensure the treated water quality :  :

Les technologies : Eaux résiduaires urbaines

  • Pretreatment :
    - Raw and fine screening
    - Grease and Sand removal
    - Physicochemical treatment

 

  • Biological treatments :
    - Suspended growth
    - Conventional process with activated sludge
    - SBR process (Sequencing Batch Reactor)
    - MBR process (Membrane Bio Reactor)

 

  • Attached growth :
    - RBC (Rotating Biological Contactors)
    - Trickling Biofilter
    - MBBR process (Moving Biological Bed Reactor)

 

  • Grease treatment

- Night soil treatment
- Sewage networks sludge treatment
- Sand treatment
- Grease Treatment

  • Tertiary treatment
    - UV disinfection
    - Chloration
    - Flocculation with lamellar settling
    - Tertiary filtration on drum filter or disc filter
    - Sand filter
    - Activated carbon adsorption
    - Membrane process
    - Advanced oxidation process (activated carbon & ozone association, hydrogen peroxide…)

 

  • Rain water treatment
    - Hydraulic modelization
    - Oil separators
    - Suspended solids retention
    - Treatment of organic trace elements (glycol…)

 

 

Nantaise des Eaux Ingénierie offers a wide range of sludge treatment adapted to its final use: agricultural reuse, energy recovery, and landfill

Nantaise des Eaux Ingénierie offers a wide range of sludge treatment adapted to its final use: agricultural reuse, energy recovery, and landfill.

  • Thickening
    - Static / hersed thickening silo
    - Filter bed
    - Filter drum

 

  • Dewatering
    - Drying beds
    - Reeds beds
    - Belt pressure filter
    - Centrifugation
    - Screw press
    - Belt filter

 

  • Drying :
    - Thermal drying
    - Solar drying

 

  • Stabilisation
    - Liming
    - Aerobic biological process
    - Anaerobic digestion and Biogaz valorization