BALASHA-JALON Infrastructure Systems LTD. (BJIS) + 972 (4) 8603600                                                                                                                                                                                     balasha@bj-is.com

+ 972 (4) 8603600

balasha@bj-is.com

+ 972 (4) 8603600  |  balasha@bj-is.com

General Background

 

The Shafdan WWTP presently treats approximately 370,000 cubic meters of wastewater per day, contributed by the entire Dan (Grater Tel-Aviv) Region.

 

The wastewater are biologically treated by the Activated Sludge process, characterized by a short sludge age, typically 3 days (SRT), while the waste activated sludge (WAS) is discharged to the sea through an outfall pipe.

 

According to a recently formed environmental policy, the discharge of WAS to the sea will be discontinued, replaced by an alternative system of sludge disposal.

 

BJIS prepared the general and the detailed design of the sludge thickening and dewatering facility which will be required for any following process to be selected for the sludge disposal.

 

The services included process, civil, mechanical electrical and control engineering and general of supervision construction.

 

The sludge and dewatering facility us under the final stage of construction (August 2008)

  

Basic Design Facts:

 

  • Volume of Waste Activated Sludge - WAS (m3/day): 25,600 - 32,000
  • WAS Solids Weight (Ton dry solids/day): 192

 

  

 

 Sludge Thickening

 

Design Data

 

  • 25,600-32,000 cum/day

  • 1,280-1,600 cum/hr

  • 0.75%-0.6% solids concentration

  • 196 ton/day solids (dry matter)

  • 9.6 ton/hr solids (dry matter)

  • Thickened sludge conc.: 4%-5%

 

Facilities

 

  • Eleven (11) G.B.T units
  • Polymers facility
  • P.C feed and thickened sludge pumps
  • Electrical and control

 

 

 

    

 

 

 

 Sludge Dewatering

 

Design Data

 

  • 3,840-4,800 cum/day
  • 192-240 cum/hr
  • 5%-4% solids concentration
  • 196 ton/day solids (dry matter)
  • 9.6 ton/hr solids (dry matter)
  • Dewatered sludge conc.: 18%-24%

 

 

 

Facilities

 

  • Five (5) decanter centrifuges
  • Polymers facility
  • P.C feed sludge pumps
  • Special, high pressure P.C pumps for dewatered sludge
  • Electrical and control 

  

 

  

 

 

 Shafdan Sludge Treatment Facility - Greater Tel-Aviv, Israel