Bojnurd Sewage Collection Network & Treatment Plant

Bojnurd Sewage Collection Network & Treatment Plant

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