ECO BOX
PRODUCT CATEGORY
TERTIARY PLANT PRODUCT NAME
ECO BOX APPLICATION
TERTIARY TREATMENT FOR TREATED WATER RE-UTILIZATION CAPACITY
FROM 1 TO 200 INHABITANTS EQUIVALENT
Certified Quality Sistem
PLANT DESCRIPTION ECO BOX is the tertiary treatment system for the final disinfection and filtration of treated water. The system consists of a water storage compartment, a sodium hypochlorite injection devise for disinfection and a final filtration with sand and activated carbons filters. The water storage tank is made in polyethylene and designed for underground installation, while filters and electromechanical equipment are housed in a steel cabinet which can be positioned above ground for easy maintenance and operation. Following the disinfection and filtration stage, water can be re-utilized for a variety of different uses e.g. irrigation, safe disposal to the environment (sea, rivers or lakes), or any other industrial and commercial utilization in line with the provision of international standards.
INSTALLAZIONE
STORAGE TANK
The storage chamber, made of a single piece of seamless polyethylene, is the tank where treated water is mixed with the disinfectant solution (sodium hypochlorite) to remove any pathogens still present in the outflow of an activated sludge plant.
DISINFECTION
Sodium hypochlorite is pumped into the storage tank by means of a membrane-dosing pump. The storage tank is designed with an appropriate volume to optimize the contact between treated water and disinfectant reagent for a time period necessary to complete the disinfection of the water.
FILTRATION
The storage chamber is also utilized to feed water to the pressurized filtration stage. A self-priming pump connected to a piping system, is utilized to feed water to the filters at a pre-determined pressure. The pump is lodge inside the steel cabinet and anchor to the floor cabinet to avoid vibrations. The pump’s discharge line is connected to the feed line of the pressure filters. The feed line of the filters is a manifold with manually operated isolation valves to allow forward feed to the filters or, when necessary, backwashing of the filters. Programmed periodical backwashing of the filters is necessary to maintain their efficiency. The on/off operation of the pump is controlled by level sensors placed in the collection chamber. The pump is activated when the water level rises to a point where there is sufficient water to make operation of the pump worthwhile and it de-activates as soon as the water level falls below the level of sustainable operation. Filtered water is generally conveyed into a final storage tank or directly connected to the irrigation system. |Back-flushing water is instead returned to the inlet of the primary treatment system. All these electro-mechanical parts are operated by an electrical panel in the ECO BOX.
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INSTALLATION EXCAVATION
Dig a hole of appropriate dimensions. The bottom of the excavation must be leveled and compacted with a 10 cm layer of fine sand (grain size 0-5 mm).
PIPING AND FITTINGS
Connect the inlet pipe of the contact chamber to the outlet of the secondary treatment system. Install the piping for the dosing pump to the feed line from disinfectant storage tank. Position the self-priming pump on a horizontal surface, Connect outlet from the self-priming pump to the inlet manifold of the filter. Connect the outlet of the filter to the final receiving vessel.
BACKFILLING
Fill the tanks with clean water before backfilling to avoid collapse of the polyethylene structure. Once the tank is full, dump sand around it and level. For a walk-on solution build a 5 cm thick light concrete layer on top of the tank and finish with a 40 cm thick soil. For a drive-on solution a reinforced concrete slab is required to protect the tank. Accessible manholes are required for inspection and maintenance.
ELECTRICAL CONNECTIONS
Connect the dosing pump and the self- priming pump to the power supply (as appropriate for your model of pump) and ensure that the connections are water tight.
COMMISSIONING
After completion of installation, check that the dosing pump and the self- priming pump are both working correctly.
CHECKS AND MAINTENANCE
Periodically check that no large bodies obstruct the inlet of the disinfection chamber by opening the inspection ports. Similarly check that the out flow of filtered water is free from suspended particles.
MAINTENANCE
Regular filters backwashing with clean water is required to keep the efficiency of the filtration process. The operator must check that there is enough disinfectant solution in the storage tank. Maintenance of the dosing pump and the self-priming pump is required on yearly basis.
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H
DIMENSIONS & DESIGN
disinfection and filtration
H
contact tank
L contact tank
l
l L
DIMENSIONS & DESIGN ECO BOX - Tertiary plant Code
Item
Equivalent
Contact tank
Disinfection and filtration
lxL
H
(cm)
(cm)
(cm)
(cm)
up to 50
100x144
108
120x200
230
Inhabitant
lxL
H
Filter Filtering media
Tension Q (m3/h)
(Volt)
KW
sand and act. carbon
2
220
1 1
10101
RAD1 220V
10102
RAD2 380V
51-100
137x220
145
120x200
230
sand and act. carbon
2
380
10103
RAD3 380V
101-150
137x220
145
120x200
230
sand and act. carbon
2
380
1
10104
RAD4 380V
151-200
174x215
180
120x200
230
sand and act. carbon
2
380
1
INFO With the installation of an ECOBOX tertiary treatment system downstream of an activated sludge treatment plant, ISEA guarantees the following performance: • BOD5 removal > 95% • Suspended Solids Removal >90% 24