Tenders Are Invited For Adjustment Of Vbt And Renovation Of Gas And Sludge Line Awzi Leiden South West (Dig-17625)

The Assignment Will Be Carried Out On The Site Of The Wwtp Leiden South West. The Current Pre-Settling Tank (Hereinafter: Vbt) And The Primary Sludge Line At The Leiden South-West Wwtp Have A Number Of Issues With Leaching Of The Sludge Bag From The Vbt In Rwa Situations (Rain Return) And Blockages In The Primary Sludge Line. To Address These Issues The Following Work Will Need To Be Carried Out. A Deflection Plate Will Be Installed In The Vbt, Four (4) Additional Sludge Bag Scrapers Will Be Added And Fixed Flushing Points Will Be Installed In The Sludge Bag. In Addition, The Agitator Drive Will Also Be Equipped With A Frequency Converter (Hereinafter: Fo) And The Gear Motor Will Be Replaced So That It Can Run At A Higher Speed. In Addition To These Adjustments, A New Primary Sludge Thickener (Hereinafter Psi) Will Be Realized With A Primary Sludge Pretreatment (Hereinafter Psv). The Following Installations Will Be Installed In The Primary Sludge Pretreatment: - A New Primary Sludge Pumping Station (Hereinafter: Psg), Including The Use Of The Existing Macerators; - A New Thickened Primary Sludge Pumping Station (Hereinafter: Ipg), Including Field Piping To The Sludge Digestion Tank (Hereinafter: Sgt) And The Collection Pit; - Installing A New Strain Press; - Installing A New Sand Trap; - Reuse Of The Existing Sand Washer, Which Must Be Adapted So That It Is Suitable For The New Situation; - A New Ls Room And Installation Of New Switch Cabinets For The New Parts.