Location:
Bojnurd, Khorasan Shomali province
Activity:
Sewerage Systems and Environment
Client:
Khorasan Shomali Water & Wastewate Company
start date:
Completion Date:
Project Description:
Services: Feasibility
studies, design and supervision
Specifications:
1.Wastewater
collection network
Plan duration:1985
- 2010
Area coverage:
2500 ha.
Pipe
diameters: 200 – 1200 mm
Network
length: 495 KM (feasibility studies)
Pipes length:40
KM (design studies)
2.Wastewater
transmission line
Pipe
diameters:1000 – 1200 mm
Pipe length: 1.5
km
Pipe material:
Concrete plus some spiral polyethylene
3.Pump
station
Pump type: M
- 150-400
Number of
pumps:4 (submersible)
Pumping
head:31 m
Max
discharge:200 lit/sec
Transmission
line: 350 and 200 mm ductile iron and asbestos cement
4.Sewage
treatment plant
Process
method: Activated sludge - extended aeration
Average
capacity:7600 m³/day
Maximum capacity:18000
m³/day
Modulation:One
module of 45000 inhabitants
Project
parts: Pretreatment installations ( trash rack, grit removal, flow meter,
biological selector, aerating ponds, secondary sedimentation tanks, return
sludge pump installations, sludge drying beds, and disinfecting system.
Treatment
plant area:22 ha.
Status: Under
operation