Budavinci Hydrofilter Gulley

In traditional urban drainage relatively clean stormwater runoff from for example, roofs, courtyards, residential roads and green areas are collected and mixed with polluted runoff from roads and other road surfaces in a channel. Subsequently, the purification of this water (depending on sensitivity) in central structures, such as a rain or a clarifier retention soil filters. The stormwater runoff from road surfaces are treated at source, permanently and can be derived in flow or stagnant water, so the construction of expensive, centralized stormwater sedimentation tanks is eliminated and creates additional land. In the treatment of stormwater runoff in the road there is no additional space required. The maintenance effort is hardly different from conventional road gullies. The Budavinci (Hydrofilter Gulley) is a street gully filter, which is due to the principle of decentralization, both ecologically and economically to the future. The space required for stormwater treatment is significantly reduced because the stormwater runoff from road surfaces are treated locally.

Possibilities of treatment: Type N
Particular substances up to 80%
Oil up to 95%
Maximum collectable area up to 300 m²
The drainage can then be made either according to the treatment and pollution in the drainage or to the recipient.
The infiltration volume is 6.5 m³ per 100 m² pad.
Disaster support: 15 liters oil.

Possibilities of treatment: Type E
Particular substances up to 90%
Oil up to 95%
Maximum collectable area up to 200 m²
The drainage can then be made either according to the treatment and pollution in the drainage or to the recipient.
The infiltration volume is 6.5 m³ per 100 m² pad.
Disaster support: 15 liters oil

Possibilities of treatment: Type Z
Particular substances up to 95%
Oil up to 95%
Maximum collectable area up to 100 m²
The drainage can then be made either according to the treatment and pollution in the drainage or to the recipient.
The infiltration volume is 6.5 m³ per 100 m² pad.
Disaster support: 15 liters oil

How it works:
1. A conventional filter basket (DIN 4052-B1) provides for the retention of coarse materials such as leaves, branches, or cigarette butts
2. The rainwater is directed into the outer calm sludge trap.
3. In outer sludge trap, there is a pre-sedimentation. Coarse solids sink to the bottom and accumulate there.
4. The accumulated water flows into the BUDAVINCI ®. From there the water passes over the two outside of the system spirally downwardly extending channels in a central treatment area. The channels hereby are arranged that the turbulence of the water is minimized by the flow path and forming downwardly laminar flow conditions.
5. Out of these channels the water is introduced tangentially into the treatment room. In here solids and the socialized pollutants downward by gravity to be knocked off in a sludge trap.
6. The sludge flow is calmed, so in there is no danger of back solution of solids in storm.
7. Through a central filter element the dissolved substances are removed from the water. The filter body is constructed in several stages. It can be maintained and replaced easily.
8. The purified water leaves the system and can be discharged directly to surface waters. The cleaning performance is similar to a living soil zone.
9. For types N and E a lateral emergency overflow allows one free backwater runoff during heavy rainfall events, so that it will never come to a back pressure dewatering to the surface and the road safety is ensured.

Stormwater management includes both technical and institutional aspects, including:
Control of flooding and erosion;
Control of hazardous materials to prevent release of pollutants into the environment (source control);
Planning and construction of stormwater systems so contaminants are removed before they pollute surface waters or groundwater resources;
Acquisition and protection of natural waterways or rehabilitation;
Building “soft” structures such as ponds, swales, wetlands or green infrastructure solutions to work with existing or “hard” drainage structures, such as pipes and concrete channels;
Development of funding approaches to stormwater programs potentially including stormwater user fees and the creation of a stormwater utility;
Development of long-term asset management programs to repair and replace aging infrastructure;
Revision of current stormwater regulations to address comprehensive stormwater needs;
Enhancement and enforcement of existing ordinances to make sure property owners consider the effects of stormwater before, during and after development of their land;
Education of a community about how its actions affect water quality, and about what it can do to improve water quality;
Planning carefully to create solutions before problems become too great.

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