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First Rainwater Tanks for Stormwater Treatment

First Rainwater System in continuous

Desander - Sludge Separator

Oil Separator
compliant with the UNI EN 858-1 standard
with Coalescence Filter

Features and Operating Principle

The First Rainwater System in Continuous is actually a system installed for the treatment of runoff water, so-called because by washing away the material stored on the reference area, it continues to produce wastewater to be purified even after the initial part of the storm event. In this type of plant, there is no overflow manhole; therefore, the water is treated immediately upon entering the tank. Sand removal and sludge separation take place in the first compartment; subsequently, the water is conveyed to the second compartment where gravimetric oil flotation occurs, and in the final compartment, the remaining micro-particles are trapped thanks to the coalescence effect of the installed filters.

Supply Specifications

Supply and installation of a First Rainwater System in Continuous sized with the following design data: rainfall 0.015 Lt/sec x sq.m, runoff coefficient equal to 1, produced in DECLARED SERIES code PPC_____, surface area sq.m._____ , total volume cu.m.__ , pipe diameter DN___ , flow rate ___ lt./sec., consisting of a Prefabricated Underground First Flush Tank (Grit Chamber-Oil Separator) manufactured by EDIL IMPIANTI 2 S.r.l. with UNI EN ISO 9001 and ISO 45001 management system, made of monoblock Vibrated Reinforced Concrete, reinforced with vertical pillars and horizontal stainless steel struts, with Elastocolor protective anti-cracking elastomeric paint on the external concrete walls for high permanent elasticity and high chemical resistance, concrete in compression resistance class C45/55 (RCK >55 N/mm²), internal improved-adherence steel reinforcements controlled at the factory and B450C type square mesh electro-welded wire mesh, equipped with CHEMICAL RESISTANCE and REACTION TO FIRE (class: A1) certifications issued by an external body according to UNI EN standards.
The Continuous First Flush System code PPC_____ consists of:

  • First Flush Tank (Grit Chamber-Oil Separator) with external dimensions of cm.____x____xh____ , in turn supplied complete with: inlet/outlet hole; AISI 304 stainless steel baffle at the inlet; grit removal compartment; internal separation wall in vibrated reinforced concrete with a passage hole and AISI 304 stainless steel baffle at the grit chamber outlet; oil separation compartment complete with a Refill coalescing filter in a removable and washable AISI 304 stainless steel frame and an automatic shut-off device of the Float Stopper type entirely made of AISI 304 stainless steel and compliant with the UNI EN 858-1 standard.


Treatment Guarantee:
D.Lgs.152/06 Part three, Annex 5, Table 3 "Discharge into Surface Waters," provided that the qualitative and dimensional values of the inflow entering the treatment itself are respected and guaranteed, limited to the parameters of total suspended solids and total hydrocarbons.



View accessories related to the Specifications

Configure the Supply Specification with the related accessories.

First Rainwater System in continuous Dimensions

Download Technical Drawings

Select Article Code to access the Data Sheet for the product.

Article
Code
Surface
(mq)
Total
volume
(mc)
Range
(lt/sec)
Pipes
Diam.
(mm)
First Rainwater tank Desander-Oil Separator
External Dimensions (cm) Weight
(ql)
Cover slab weight (ql)
Width Length Height h. 15 cm
(C250)
h. 20 cm
(D400)
PPC100 100 1,2 1,5 125 125 130 100 13,1 6,1 8,1
PPC200 200 1,6 3,0 125 125 130 130 15,9 6,1 8,1
PPC300 300 1,8 4,5 125 125 130 150 17,6 6,1 8,1
PPC600 600 2,6 9,0 160 125 180 150 21,6 8,4 11,2
PPC800 800 3,8 12,0 160 175 180 150 26,7 11,7 15,6
PPC1200 1.200 4,5 18,0 200 180 180 200 53,5 12,1 16,1
PPC1300 1.300 6,0 19,5 200 180 220 200 60,2 14,8 19,7
PPC1500 1.500 7,5 22,5 200 180 270 200 68,7 18,1 24,1
PPC1800 1.800 9,0 27,0 200 180 320 200 77,1 21,5 28,6
PPC2000 2.000 11,0 30,0 200 246 220 250 93,3 20,2 26,9
PPC3000 3.000 13,0 45,0 200 246 270 250 104,5 24,7 33,0
PPC3500 3.500 16,0 52,5 250 246 320 250 115,6 29,3 39,1
PPC4000 4.000 19,0 60,0 250 246 370 250 126,8 33,9 45,2
PPC4500 4.500 21,0 67,5 315 246 420 250 138,0 38,5 51,3
PPC5000 5.000 24,0 75,0 315 246 470 250 154,6 43,1 57,4
PPC6000 6.000 30,0 90,0 315 246 570 250 177,0 52,2 69,7
PPC7000 7.000 32,0 105,0 400 246 620 250 188,2 56,8 * 75,8 *
PPC7500 7.500 35,0 112,0 400 246 670 250 199,3 61,4 * 81,9 *
PPC8000 8.000 40,0 120,0 400 246 770 250 227,1 70,6 * 94,1 *
PPC9000 9.000 42,0 135,0 400 246 820 250 238,3 75,2 * 100,2 *
PPC10000 10.000 45,0 150,0 400 246 870 250 249,5 79,7 * 106,3 *
PPC12500 12.500 57,0 187,5 400 246 1120 250 310,8 102,7 * 136,9 *
PPC15000 15.000 70,0 225,0 400 246 670 + 670 250 199,3 + 199,3 61,4 * + 61,4 * 81,9 * + 81,9 *
PPC17500 17.500 82,0 262,5 400 246 770 + 820 250 227,1 + 238,3 70,6 * + 75,2 * 94,1 * + 100,2 *
PPC20000 20.000 90,0 300,0 400 246 870 + 870 250 249,5 + 249,5 79,7 * + 79,7 * 106,3 * + 106,3 *

* Cover Slab divided into two parts - The data reported is purely indicative
It is possible to have extensions (bottomless tanks) for all of our products
For Dimensioning with bigger volumes other than those reported in the table, please contact our Technical Department.