Over a period of a hundred an ten years, from 1901 to 2011, Indian urban population has exploded from 25.8 million to estimated 387 million. This has put extreme pressure on the fresh water resources of the nation due to concurrent expansion of agricultural sector, industrialization and urbanization. Thus, a self perpetuating problem has been generated, overload of sewage and lack of fresh water.
The purpose of this project is to visit the sewage treatment plant (STP) at Kalyani in West Bengal, India, and try to collect as much information as possible, on the various aspects of the treatment plant, such as demographic significance, sewerage conditions of surrounding areas, total area and individual areas of the various treatment and handling methods, plant capacity, energy requirements, treatment methods employed and number of such facilities, performance of the equipment and processes, quality (both chemical and physical), volume and location of the discharged water, presence of quality control mechanisms, methods of sludge disposal and so on.
After collecting the above information, these recorded parameters will be presented in tabular form and hence will enable one to compare this sewage treatment plant with other similar plants in West Bengal and rest of India. This will help us to assess the condition of such plant in the country and comment on the quality of the discharged water from these plants. The collected information will also be used to compare the previous and latest results and efficiency after the retro fitting is complete.
By 2050, it is projected that 50% of the Indian population is going to reside in urban establishments, while even now, public services are not able to keep up with the demand of the rapid urbanization. Majority of Indian cities lack sewerage infrastructure or sewage treatment plants. Thus, sewage and other domestic and commercial wastes are discarded into rivers or pond or in open dumps away from cities.
Table of Contents
5. Introduction
6. Review of Literature
7. Review of Literature Historical Background
8. Review of Literature Technical Overview
9. Satellite Imagery Kalyani Town
10. Field Visit
11. Satellite Imagery Kalyani STP
12. Summary & Conclusion
Project Objective and Research Focus
The primary objective of this project is to assess the current performance and operational status of the Sewage Treatment Plant (STP) located in Kalyani, West Bengal. By conducting a detailed field visit and collecting data on parameters such as plant capacity, treatment methods, and effluent quality, the project aims to evaluate the effectiveness of the ongoing technological upgrades and compare the facility's performance against national standards.
- Technical appraisal of primary and secondary sewage treatment processes at the Kalyani STP.
- Assessment of the infrastructure for sewage collection and transport within the Kalyani municipal area.
- Evaluation of chemical and physical quality parameters of the sewage water before and after treatment.
- Comparison of treatment efficiency between conventional systems and traditional Waste Stabilization Ponds.
- Analysis of the impact of operational challenges such as power supply and labor requirements on overall plant performance.
Excerpt from the Book
Technical Overview
The sewer systems can be of three types, namely sanitary, storm and combined sewer system. Sanitary sewer systems usually carry waste water from household bathroom and kitchens and commercial establishments. Storm sewers carry mainly rain water during monsoon seasons. A combined sewer system is one which carries both storm water and waste water in the same pipe (Fig. 2.2) [44].
The pipe which carries the waste water in a separate sewer system is referred to as foul sewer. In a combined system sewer, the waste water is diluted by the storm overflow and thus has a lesser concentration than the waste water carried by a separate sewer system. Waste water treatment plant which collect waste water from combined system must make provisions for storage of excess water during storm events in vessels called storm tanks [9]. This excess storm water flow defines to a great extent the necessary hydraulic capacity of the waste water treatment plant [10].
However, wastewater can also be defined in details as a combination of one or more of:
• domestic effluent consisting of black water (excreta, urine and fecal sludge) and grey water (kitchen and bathing wastewater);
• wastewater as a result of commercial activities, and public health services like nursing homes and hospitals;
• industrial effluent, storm water and other urban run-off;
• agricultural, horticultural and pisciculture sewage, either, whether dissolved or as suspended solids [11]
Summary of Chapters
Introduction: This chapter provides an overview of the growing urbanization in India and the subsequent challenges regarding infrastructure, sewage generation, and fresh water scarcity.
Review of Literature: This section details the chemical properties of water, the historical evolution of sewer systems, and the technical principles governing various waste water treatment methods.
Satellite Imagery Kalyani Town: This section provides visual documentation and geographical context of the Kalyani municipal area serving as the catchment zone for the treatment plant.
Field Visit: This chapter presents the observations and data gathered during the onsite inspection of the sewage treatment facilities in Kalyani.
Satellite Imagery Kalyani STP: This chapter includes specific aerial documentation of the sewage treatment plant infrastructure.
Summary & Conclusion: This final section compiles the collected performance data and provides a concluding analysis on the plant's operational effectiveness and the need for future developments.
Keywords
Sewage Treatment Plant, Kalyani, Wastewater Management, Activated Sludge Process, Trickling Filters, Waste Stabilization Ponds, BOD, COD, Water Pollution, Infrastructure, Environmental Engineering, Sludge Dewatering, Nutrient Removal, Sustainable Sanitation, Urban Hydrology.
Frequently Asked Questions
What is the primary focus of this project?
The project focuses on a technical appraisal of the sewage treatment plant situated in Kalyani, West Bengal, evaluating its operational capacity and the quality of treated effluent.
What are the central themes discussed in this work?
Key themes include urban sewage generation, the history of sanitation technologies, performance evaluation of conventional vs. traditional treatment methods, and the environmental impact of untreated waste.
What is the main research objective?
The objective is to collect onsite performance data from the Kalyani STP and assess how current technological retrofitting improves the plant's efficiency in meeting environmental discharge standards.
Which scientific methods were employed for this analysis?
The project utilized field observations, performance parameter measurements (BOD, COD, TSS, etc.), and comparative analysis against national regulatory standards.
What topics are covered in the main body?
The main body covers the theoretical background of wastewater treatment, the classification of sewage, detailed technical descriptions of the Kalyani STP's unit processes, and quantitative data on treatment efficiency.
How would you characterize this work using keywords?
The work is characterized by terms such as Wastewater Management, Kalyani STP, Sewage Treatment, BOD, COD, and Environmental Sustainability.
How does the plant handle the division of sewage inflow?
The plant uses a split chamber to divide influent sewage into two streams: one for the Trickling Filter (conventional) system and one for the Waste Stabilization Ponds (traditional) system.
What role does the sludge pond play in the treatment process?
The sludge pond serves as a tertiary treatment area where microorganisms degrade remaining bacteria, contributing to a significant reduction in BOD levels before the final discharge.
Why is the Kalyani STP considered to be operating under load conditions?
The influent stream is observed to have low organic material content (low BOD levels), which indicates that the plant is currently operating below its design capacity.
- Quote paper
- Mrittik Mukherjee (Author), 2016, Sewage infrastructure in West Bengal, India. A case study of the waste water treatment plant situated at Kalyani, Munich, GRIN Verlag, https://www.grin.com/document/338074
