Sector Sewerage

Project Type Treatment Plant Construction

Project Title Denpasar Sewerage Development Project (DSDP)

Location Bali, Republic of Indonesia

Client Ministry of Public Works , Directorate General of Human Settlement/ JICA

Project Period October 2004 – December 2008

Problems addressed by the Project

Denpasar is the residential and economic center of Bali Island, and adjacent coastal areas of Kuta and Sanur are international resort areas with beautiful beaches in tropical nature and holding theatrical activities in traditional culture. In 2000, about 1.5 million foreign tourists visited Bali and spent US$50 million.

However the development of these areas and tourism industry is deteriorating the local environment. Maintaining the beautiful beaches and water nature is essential for maintaining the Bali tourism industry. Based on the master plan, overall sewerage development area was defined as an area which generates heavy wastewater pollution from resident and tourist area. The aim of this sewerage system is to transfer wastewater generated in households, hotels and others to wastewater treatment plant (WWTP) through sewers and pumping stations. Phase1 of the project covers of 1200 ha in urgent area (30% of overall area). The Project started in 2004 and was completed at the end of 2008.

The Project comprised two ICB packages and five LCB packages which are outlined below. The priority Package ICB1 and 2 containing the WWTP, pumping stations, force main and trunk sewers commenced on 24 December 2003 and ICB1 was completed on 20 February 2007 and ICB2 was completed and started operation of all facilities in 2008.

Service Period

Master Plan Feasibility Study Detailed Design Tender Assistance and Construction Supervision Contract Administration, Quality Assurance Safety precautions and Environment Protections

Actual Project Recommendations

1. Package ICB1: WWTP; Capacity is 51,000 m3/day, wastewater treatment method is the aerated lagoon system Size of Sewer; From 200 mm to 1,200 mm Total Length of Sewer; 47,000 m in which pipe jacking method was applied with the length of 7,000 m

2. Package ICB2: Sanur Pimping Station; Pump Type: Vertical Volute Casing Mix Flow, No. of Pump: 3, Capacity: 6.2 m3/min Kuta Pimping Station; Pump Type: Vertical Volute Casing Mix Flow, No. of Pump: 3, Capacity: 11.9 m3/min Size of Sewer; From 200 mm to 1,000 mm, Total Length of Sewer; 41,000 m Force Main; Pipe Size and Length: 500mm, L=3500 m, 600mm, L=3800 m, including three pipe bridges Package LCB1: Pipe Installation (Total Pipe Length=22km) and House Connection (2,500 connections) Package LCB2: Pipe Installation (Total Pipe Length=2km) and House Connection (2,000 connections)

Package LCB3: Pipe Installation (Total Pipe Length=5km) and House Connection (1,000 connections) Package LCB4: House Connection (1,200 connections)