Civil Wastewater Purification Plants
Gazebo S.p.A. has many years of experience in the design and manufacture of civil wastewater treatment and purification plants.
Civil wastewater purification plants are used in the following applications:
Residential areas
Industrial areas
Public and private offices
Schools
Barracks
Outpatient clinics and medical centres
Sports centres and recreational facilities
Retail and wholesale
Cafes
Truck stops
Catering facilities
Tourist facilities
Hotels
Campsites
Holiday farms
Mountain lodges
Civil Wastewater Treatment
Current legislation provides the following regulations.
The regulations classify wastewater into domestic, urban and industrial.
Domestic wastewater is considered to be civil wastewater from human excreta and metabolism and from domestic activities, containing primarily cellulose, lipids, proteins, urea, uric acid, carbohydrates, etc.
The category of domestic wastewater also covers:
- wastewater specified in regional regulations with equivalent characteristics;
- wastewater produced by production activities considered to have a lower environmental impact, such as certain types of fish farms (low density per square metre or in relation to the flow of water) and agro-livestock farms (low nitrogen content in the effluent).
The legislation sets out limits for the parameters of wastewater generated by production processes below which it may be categorised as domestic wastewater.
The parameters in question include: the flow rate, pH, temperature, colour, coarse materials, total suspended solids, BOD5, COD, COD/BOD5 ratio, total phosphorus, ammonia nitrogen, nitrous and nitrate nitrogen, animal and vegetable fats and oils, surfactants, etc.
Civil Wastewater
treatment levels.
Depending on the case, civil wastewater can be treated to different levels: preliminary, primary, secondary, tertiary, refining and sludge treatment.
Preliminary and primary
treatments
These remove unwanted and settleable components.
Secondary and tertiary
treatments
These remove soluble organic components and nitrogen, phosphorus and other nutrients.
Refinement
treatments
These remove suspended solids and disinfect the wastewater.
Sludge
treatment
Used to reduce moisture and putrescence.
Gazebo Plants
for Civil Wastewater Purification
Imhoff Tanks
Imhoff Tanks (or Imhoff Pits) are used to treat sewage in small or medium-sized purification plants.
They consist of two internal compartments: an upper sedimentation compartment and a lower digestion compartment.
APPLICATIONS
Residential and industrial areas.
Tourist facilities.
Public Bodies.
Two- and Three-Chamber Septic Tanks
Two- and three-chamber Septic Tanks are equipped with an underground holding tank with two or three chambers with common compartments for sewage and sludge, which collect and dispose of black water and grey water from domestic drains.
They are designed to allow active enzymes to purify the lighter sludge as it passes from one chamber to another.
APPLICATIONS
Residential areas, homes, apartment blocks.
Industrial areas, restaurants, hotels, canteens, catering, cafes, truck stops, meal packaging centres.
Agri-food industries, slaughterhouses, butchers shops, wine cellars, dairies, canneries, pastry and confectionery production, fish industries.
Tourist facilities, campsites, spas.
Public Bodies, hospitals, communities, schools.
Static Degreasers
Static Degreasers are used to treat wastewater containing oils and animal/vegetable fats.
These physically treat the wastewater by means of decantation, sedimentation and gravity floatation.
APPLICATIONS
Kitchens in general (restaurants, hospitals, hotels, company/school canteens, industrial food processing).
Aerobic Percolating Filters
Aerobic Percolating Filters treat the clarified water exiting the Imhoff Tank.
This treatment reduces the organic matter contained in the wastewater by means of aerobic microorganisms (bacteria, protozoa, fungi, metazoa, etc.) attached to the plastic bulk fill material, on which they form a mucilaginous biological film.
APPLICATIONS
Residential and industrial areas.
Tourist facilities.
Public Bodies.
Anaerobic Percolating Filters
The clarified water exiting the Imhoff Tank is conveyed to the lower part of the Anaerobic Percolating Filter.
Anaerobic Percolating Filters contain plastic bulk fill material with a high surface area/volume ratio, which establish an anaerobic process to breaks down a variable percentage of the incoming wastewater.
APPLICATIONS
Residential and industrial areas.
Tourist facilities.
Public Bodies.
Monobloc Imhoff Tank + Aerobic Percolating Filter System
A Monobloc System which biologically reduces the organic substances contained in the wastewater using microorganisms.
The clarified water exiting the Imhoff Tank is treated in the Aerobic Percolating Filter containing plastic bulk fill material coated with aerobic microorganisms.
APPLICATIONS
Residential and industrial areas.
Tourist facilities.
Public Bodies
Monobloc Imhoff Tank + Anaerobic Percolating Filter System
The clarified water exiting the Imhoff Tank is conveyed to the lower part of the Anaerobic Percolating Filter, containing plastic bulk fill material.
The anaerobic process in the vessels breaks down a percentage of the incoming microbial load, which will vary in relation to a variety of factors.
The clarified effluent is finally conveyed by gravity to the final discharge.
APPLICATIONS
Residential and industrial areas.
Tourist facilities.
Public Bodies.
Extended Aeration Activated Sludge Purification Plants
Gazebo S.p.A. designs and manufactures Extended Aeration Active Sludge Purification Plants with a single monobloc tank (MINIBIOXY/BCS – combined basin) or with several tanks (MINIBIOXY/BSP – separate basin).
The activated sludge produced by the transformation of the organic substance by specific bacteria, separated and collected at the bottom of the hopper of the final sedimentation tank, is continuously recirculated to the aeration phase, while the resulting surplus is periodically extracted.
UTILIZZO
Urban and rural communities, small workshops and commercial enterprises, single-family residences, campsites, tourist villages, hotels, shopping centres.
For small and large communities: available in combined basin (settlements with 10 to 350 p.e.) and separate basin (settlements with 400 to 2,500/3,000 p.e.).
SBR (Sequencing Batch Reactor) Purification Plants
SBR Purification plants consist of one or more interconnected tanks, complete with internal compartments for roughing/primary sedimentation, holding/homogenisation, biological oxidation and secondary sedimentation.
The purification process involves a sequence of cycles, repeated several times a day.
APPLICATIONS
Small urban and rural communities.
Single-family residences.
Small workshops and commercial enterprises.
Campsites, tourist villages, hotels, shopping centres.
MBBR (Moving Bed Biofilm Reactor) Purification Plants
A further development of activated sludge plants, MBBR Purification Plants are suspended-mass biological purification plants in which the filling material, consisting of rigid plastic material with a high specific surface area, is placed inside the reactor and acts as a substrate for microorganism cultures.
MBBR Purification plants can handle much higher loads than conventional Activated Sludge plants.
APPLICATIONS
Industrial, manufacturing, commercial and residential areas, schools, hotels, campsites, tourist villages.
Very suitable for upgrading existing plants (addition of carriers and containment nets within existing oxidation tanks).
MBR (Membrane Biological Reactor) Purification Plants
In an MBR (Membrane Biological Reactor) Purification Plant, biological activated sludge purification technology is combined with ultrafiltration of the sludge through membranes in place of traditional secondary settlers.
This technology increases the filtering efficiency and purification capacity, thus reducing the amount of sludge to be disposed of.
It also ensures compliance with bacteriological limits without the need for disinfection.
APPLICATIONS
Small urban and rural communities, small workshops and commercial enterprises, single-family residences, tourist facilities, shopping centres, Public Bodies.
And in all cases where high effluent quality, a small plant footprint, low TSS content and reuse of purified water are required.
Biodisc Purification Plants
(biological rotors)
Biodisc Purification Plants allow biological treatment with attached biomass in which the biological rotors act as an inert substrate for the growth of the biomass.
Constantly rotating between phases of contact immersion in the wastewater and emersion in the air, Biodisc Purification Plants enable the degradation of the organic substances with very short retention times, which means that smaller volumes are required compared to activated sludge systems.
APPLICATIONS
Small urban and rural communities, farms, hotels, shopping centres, Public Bodies.
Dortmund type Sludge Sedimentation Units
Dortmund type Sludge Sedimentation Units are used especially for final sludge sedimentation downstream of biological and chemical-physical treatment processes.
The operation consists in continuously weighting the sludge, and in the “thickener” version for biological sludge, the tank is equipped with internal piping and AISI 304 stainless steel flanged stub pipes for extracting the sludge from the bottom of the hopper.
APPLICATIONS
Residential and industrial areas, tourist facilities, Public Bodies.
And in all situations where physical treatment is required to clarify the effluent and thicken the sludge.
Grey Water Treatment Plants
Plants consisting of a treated water treatment tank, water holding and pumping, stainless steel mesh filter and ultra-microfiltration stations with organic fibre membranes.
Treated grey water from domestic sinks, showers, baths and bidets provides a low-cost water supply for watering green areas, flushing toilets and washing machines, and cleaning cars and outdoor areas.
APPLICATIONS
Residential, tourist and sports facilities.
Here are some of the clients who have already chosen our tanks
and Civil Wastewater Purification Plants.
Agri-Food
Industries
OROGEL
Cesena (FC)
GRANAROLO
Bologna (BO)
PARMALAT
Collecchio (PR)
VALCOLATTE
Pontenure (PC)
INALCA
Castelvetro di Modena (MO)
Gruppo AMADORI
Cesena (FC)
INALCA
Parma (PR)
SANIFRUTTA
Costigliole Saluzzo (CN)
CAMST
Villanova di Castenaso (BO)
FUMAIOLO
Verghereto (FC)
UNIGRA’
Conselice (RA)
CONBIO
Coriano (RN)
MEC3
San Clemente (RN)
ILIP
Valsamoggia (BO)
VITROPLANT
Cesena (FC)
PROSCIUTTIFICIO SAN FRANCESCO
Castelnuovo Rangone (MO)
SALUMIFICIO SANDRI
Montescudo (PI)
PODERI DAL NESPOLI
Nespoli (FC)
Major Construction
Companies
ITINERA
Tortona (AL)
GRUPPO I.C.M.
Vicenza (VI)
C.M.C.
Ravenna (RA
TOTO COSTRUZIONI GENERALI
Chieti (CH)
COLOMBO COSTRUZIONI
Lecco (LC)
CIMOLAI
Porcia (PN)
ASTALDI
Roma (RM)
TECHBAU
Castelletto sopra Ticino (NO)
BETONCABLO Gruppo CASTIGLIONI
Busto Arsizio (VA)
IMPRESA PERCASSI
Bergamo (BG)
Major
Industries
FINCANTIERI
Trieste (TS)
WÄRTSILÄ ITALIA
San Dorligo della Valle (TS)
BUZZI UNICEM
Casale Monferrato (AL)
ALFAGOMMA
Castellato (TE)
TRAFILSPEC
Castelmarte (CO)
DULEVO INTERNATIONAL
Fontanellato (PR)
ITT ITALIA
Lainate (MI)
CULLIGAN ITALIANA
Granarolo dell’Emilia (BO)
NESPAK
Massa Lombarda (RA)
GELSON
Lainate (MI)
PIRELLI
Milano (MI)
TECHNOGYM
Cesena (FC)
SAINT GOBAIN ITALIA
Milano (MI)
FERRETTI GROUP
Forlì (FC)
SELLE SMP
Casalserugo (PD)
PROMINENT ITALIANA
Lavis (TN)
IMPERIA YACHT SERVICE
Imperia (IM)
I.C.A. – Industria Chimica Adriatica
Civitanova Marche (MC)
AVIO AERO
Rivalta di Torino (TO)
Major
Sports Clubs
S.S.C. NAPOLI
Napoli (NA)
F.C. INTERNAZIONALE MILANO
Milano (MI)
Water and Energy Management
Bodies and Companies
A2A
Brescia (BS)
ACEA
Roma (RM)
HERA
Bologna (BO)
PADANIA ACQUE
Cremona (CR)
UMBRIADUE
Terni (TR)
MARCHE MULTISERVIZI
Pesaro (PU)
TERNA
Roma (RM)
SAIPEM
San Donato Milanese (MI)
ACQUE
Empoli (FI)
CERVINO VALTOURNENCHE
Aosta (AO)
FERROVIE NORD MILANO AUTOSERVIZI
Milano (MI)
Public
Organisations
ESERCITO ITALIANO
POSTE ITALIANE
AERONAUTICA MILITARE ITALIANA
Gazebo stands for Affordable Quality
with 6 major Advantages for the User.
ZERO
extraordinary maintenance costs
ZERO
downtime costs
ZERO leaks
and infiltration
Reduced running
and routine maintenance costs
Delivery
and assembly
in just 2-7 days
Tax benefits
Hyper-depreciation
Industry 4.0
Gazebo Quality pays for itself
in the short term.
What is more, Gazebo Affordable Quality
is also Worry Free.
Free
executive design service
Seismic
documentation
always included
in the price
All documentation
archived for
at least
30 years
Spare parts
always available
Full technical
assistance
From site surveys
to commissioning,
service trials to
after-sales support
Guarantees
and Certifications
UNI EN ISO 9001: 2015
UNI EN ISO 14001: 2015
UNI EN ISO 45001: 2015
SOA certification
Category OS22
