A case study on Sewage Treatment Plant in Jamnagar
Background
Government of India (GoI) approached the World Bank for assistance in formulating a strategy for environmental protection of coastal zones of India and subsequently GoI conceived the Project of “Integrated Coastal Zone Management Project” (ICZMP) and as part of pilot investments these projects were taken up initially for the states of Gujarat, Odisha, and West Bengal. ICZMP was the outcome of the mandate for sustainable development and coastal region conservation in the year 2005 backed by the Supreme Court judgment for protection of coastal recourses/maritime bio-diversity. The project has been implemented by Jamnagar Municipal Corporation with the technical inputs from the SPMU of ICZMP Gujarat i.e. Gujarat Ecology Commission (GEC).
Goal
Development of Underground Sewerage System for the area under Jamnagar Municipal Corporation (Jamnagar City including Jamnagar Urban Development Authority) for the conservation and management of coastal and marine biodiversity.
Objectives
- Establishment of an efficient underground sewerage system in Jamnagar to minimize the impact of untreated sewage disposal on the coastal and marine environment thus leading to the conservation of coastal biodiversities such as corals and mangroves.
- Establishment of 70 MLD Sewage Treatment Plant.
Benefits
- Conservation of marine life with better management of sewage.
- Rejuvenation of marine species seagrass and corals which were long lost due to the dumping of untreated sewage.
- Better management and conservation of marine biodiversity.
- Reduced chances of contamination of the groundwater and in the water supply pipelines leading to reduced incidence of diseases, improved health condition.
- Economic benefits to farmers by usage of treated sewage water for irrigation purposes and dried sludge as manure.
- Generation of permanent employment at STP site.
The Project at a Glance
| Start Date | June 2010 | End Date | June 2016 |
|---|---|---|---|
| Cost | INR 88 Cr | Funding Agency | World Bank |
Implementing Agencies
Formal Memorandum of Understanding was signed between Jamnagar Municipal Corporation (JMC) and SPMU-GEC under Integrated Coastal Zone Management Project on 12th April 2010 and selected JMC as Project Executive Agency (PEA) to implement and manage the project under ICZMP. For the implementation of the Sewerage Components for Jamnagar City GEC-SPMU-JMC appointed Mott MacDonald Pvt. Ltd as Project Management Consultants (PMC).
70 MLD Capacity Sewage Treatment Plant (STP) – Design; Build; Operate and Transfer (DBOT)
The Committee, as a part of its proceedings, had concluded & recommended that the bid submitted by M/s. Essar Projects (India) Ltd /Thermax Limited–JV was lowest evaluated substantially responsive bid with price standing Rs, 78 crores. This included O & M for initial 2 years and for 13years post Operation & Management, the operator shall pay Rs 2 crore as the premium to JMC through the sale of treated water as part of bid criteria.
The process technology and treatment method were adopted by Essar-Xylem who proposed SBR-ICEAS method of secondary treatment of wastewater.
Process Treatment Scheme
Construction of the plant along with the trial run, testing, & commissioning was successfully completed by the Operator on 31st August 2016. During the trial run, testing & commissioning period the plant was tested for live load test for all units, and all the minor issues related to operations were attended for all Electro-Mechanical & Instrumentation units installed, regular servicing and calibration was done for all types of equipment on need basis during this plant performance /commissioning period. Laboratory was established during this period with Lab chemist/plant manager, and all the types of equipment required for testing the water quality parameters (as per bid requirement) were set up after calibration of all types of equipment put in use at Lab.
Health Benefits
Data shows that there is a clear decline in the cases of malaria, dengue and chikungunya as well as diarrhea/vomiting, cholera, jaundice, and typhoid over the period from 2011 to 2016.
Lessons Learnt
This was the first integrated sewage infrastructure project in the Coastal region of Saurashtra. Implementation of this project was certainly a big challenge to all who were involved in the execution of this project. During the project execution, various issues/ problems surfaced especially with regard to field conditions, non-performance of the contractors as per schedule and delay in getting permissions from other Government Departments and were solved. These issues got handled adequately but on certain additional ‘time’. These issues could be well be summarised as ‘Lesson Learnt’ so that during execution of similar projects by JMC as well as other similar authorities elsewhere could avoid additional ‘time & cost’ in future.
