“Zero Net Balance Water Activity through Integrated Wastewater Recycling”.

KCH & MRC, Krishna VishwaVidyapeeth, Karad, is a multidisciplinary campus comprising academic institutions, a tertiary care teaching hospital, residential hostels, research laboratories, administrative buildings, and supporting infrastructure that require a continuous and dependable water supply.

The growing demand for water to support patient care, sanitation, academic activities, laboratories, residential facilities, and landscape maintenance, coupled with increasing pressure on natural freshwater resources, created the need for a sustainable and integrated water management system.

A considerable proportion of freshwater was consumed for non-potable purposes such as gardening, landscape irrigation, road cleaning, and utility services. At the same time, large volumes of wastewater generated across the campus represented a valuable resource that could be scientifically treated and safely reused. Seasonal rainfall also offered an opportunity to replenish groundwater through rainwater harvesting and recharge structures.

However, these resources were traditionally managed independently, limiting opportunities for optimum water conservation and resource efficiency.

To address these challenges, KCH & MRC, KVV introduced the Zero Net Balance Water Activity through Integrated Wastewater Recycling initiative, founded on the principles of Reduce, Recycle, Reuse, and Recharge (4R).

The project integrates advanced wastewater treatment, reuse of treated water for non-potable applications, rainwater harvesting, and groundwater recharge into a unified campus-wide water management framework. This integrated approach minimizes dependence on freshwater sources, reduces wastewater discharge, improves water-use efficiency, and promotes sustainable utilization of available resources.

By establishing a circular water management system, the initiative strengthens environmental stewardship, enhances institutional water security, supports climate resilience, and demonstrates a scalable and

Major Objectives of the Zero Net Balance Water Activity

1. To reduce dependence on freshwater resources through efficient water management practices.
2. To recycle wastewater generated within the campus using an efficient Sewage Treatment Plant (STP).
3. To maximize the reuse of treated wastewater for gardening, landscaping, and other approved non-potable applications.
4. To enhance groundwater recharge through scientifically designed rainwater harvesting systems and recharge/percolation pits.
5. To improve water-use efficiency by integrating water conservation, recycling, reuse, and recharge into a single management framework.
6. To establish a sustainable and reliable institutional framework to promote climate resilience and responsible environmental management.

Zero Net Balance Water Activity

Zero Net Balance Water Activity through an integrated water management system based on the 4R Water Sustainability Framework—Reduce, Recycle, Reuse, and Recharge.

Freshwater is utilized for essential requirements including patient care, academic activities, laboratories, hostels, sanitation, and other institutional operations.

Wastewater generated across the campus is collected through a centralized drainage network and conveyed to the Sewage Treatment Plant (STP) with a total installed capacity of 1,000 KLD (500 KLD + 500 KLD). The STP operates using Moving Bed Biofilm Reactor (MBBR) technology with a treatment capacity of 25 m³/hour, producing treated water that meets regulatory standards for non-potable reuse.

The treated water is stored separately and reused for landscape irrigation, gardening, green belt maintenance, and other approved non-potable applications, thereby significantly reducing freshwater consumption.

Simultaneously, rainwater harvesting systems and groundwater recharge structures, including recharge and percolation pits, capture seasonal rainfall to replenish groundwater resources.

Water consumption, wastewater treatment, treated water reuse, and groundwater recharge are monitored through calibrated water metering and periodic water quality analysis to assess performance and drive continuous improvement.

The integration of wastewater recycling, treated water reuse, and rainwater recharge establishes a sustainable circular water management system, reduces dependence on freshwater sources, and minimizes wastewater discharge.

By integrating wastewater treatment, treated water reuse, rainwater harvesting, and groundwater recharge within a single operational framework, the initiative significantly improved campus-wide water-use efficiency and reduced dependence on freshwater resources.

The campus has a total water requirement of 668 KLD, primarily for domestic use, including patient care, academic activities, laboratories, hostels, residential facilities, sanitation, and other institutional operations.

Wastewater generated across the campus is scientifically treated through a 1,000 KLD Sewage Treatment Plant (500 KLD + 500 KLD) using Moving Bed Biofilm Reactor (MBBR) technology.

Approximately 562 KLD of treated water is reused for non-potable applications such as landscape irrigation, gardening, green belt maintenance, road cleaning, and utility services, resulting in substantial freshwater conservation and reduced discharge of treated wastewater.

Seasonal rainfall is effectively utilized through rainwater harvesting systems and recharge/percolation pits, contributing to groundwater replenishment and improving long-term water security.

Continuous monitoring of water consumption, treated water reuse, water quality, and system performance ensures operational efficiency and regulatory compliance.

The implementation of the Zero Net Balance Water Activity required the integration of wastewater treatment, treated water reuse, and rainwater harvesting into a unified campus-wide water management system.

Major challenges included maintaining a continuous supply of treated water for non-potable applications, ensuring compliance with prescribed water quality standards, optimizing freshwater utilization, and sustaining the efficiency of rainwater harvesting and groundwater recharge structures through regular maintenance and seasonal monitoring.

Coordinating water management across the tertiary care hospital, academic institutions, hostels, and other campus facilities also required systematic planning and operational oversight.

The initiative was successfully enabled by a 1,000 KLD Sewage Treatment Plant (MBBR technology), dedicated treated water storage and distribution systems, rainwater harvesting structures, and recharge/percolation pits. Regular operation and preventive maintenance of the STP, periodic water quality testing, calibrated water metering, and continuous monitoring of water consumption and reuse ensured reliable performance.

Strong institutional commitment and coordinated facility management further supported sustainable water conservation, groundwater recharge, and established a sustainable and replicable long-term water security system across the campus.

The Zero Net Balance Water Activity demonstrated that sustainable campus water management can be achieved by integrating water conservation, wastewater recycling, treated water reuse, and groundwater recharge into a single operational framework.

The initiative confirmed that treated wastewater from the 1,000 KLD Sewage Treatment Plant (MBBR technology) can safely replace freshwater for approved non-potable applications such as landscape irrigation and gardening, significantly reducing dependence on natural freshwater resources.

Integrating STP operations with rainwater harvesting and groundwater recharge proved more effective than implementing these systems independently, creating a sustainable circular water management system.

Continuous monitoring of water quality, preventive maintenance of treatment facilities, calibrated water metering, and periodic performance assessment were critical in ensuring long-term operational efficiency and regulatory compliance.

The 4R Water Sustainability Framework—Reduce, Recycle, Reuse, and Recharge—offers a practical, scalable, and replicable model for universities, hospitals, and large institutional campuses. This approach strengthens water security, conserves freshwater resources, supports