In July 2002 the Intermunicipal Water Company of the Veurne region (I.W.V.A.) has started
the production of infiltration water for artificial recharge of an unconfined aquifer in dune
water catchment. The source for the production of infiltration water is wastewater effluent; the
techniques are a combination of membrane filtration. The flow scheme of the wastewater treatment plant (WWTP) of Wulpen, operated by Aquafin
who is responsible for all wastewater treatment in Flanders, is as follows: primary settlement;
predenitrification; aeration; and finally, a clarifier. To reduce the phosphorous content, iron is
dosed at the inlet of the WWTP. The wastewater is mainly domestic.
Based on the experience of the pilot tests, the Intermunicipal Water Company of the Veurne
region (I.W.V.A.) chose the following steps to further treat the effluent: microfiltration
(MF); cartridge filter; reverse osmosis (RO); and, ultraviolet irradiation. In this water production
center, called "Torreele", the produced RO filtrate is mixed with 10% of MF filtrate for partial
re-mineralization. This water recharges a sandy unconfined aquifer in an existing water
catchment in the dunes; the residence time of the recharged water in the aquifer is a minimum of
40 days.
The contract for the technical installation was awarded to the combination Seghers
Better Technology for Water / ZENON. The I.W.V.A. will operate the plant but the contractors
remain responsible during a 10 year period.
This paper gives an overview of the full-scale plant and of the first five months of operation. Includes 2 references, tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 420 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 8 |
| Published : | 03/05/2003 |
