How To Really Reduce Carbon Footprint In A VLCC

Introduction: Why Carbon Footprint Matters in VLCC

Today sustainability is no longer a choice but is a responsibility. Every small action taken at grassroot level will make a big difference. In dairy industry, one such important aspect is the carbon footprint. Many people think that carbon footprint is a corporate or global concept. In simple terms Carbon Footprint is the total amount of greenhouse gases like Cabon Dioxide (CO2) and Methane released into the atmosphere to produce a product.

The dairy supply chain starts from the farmer’s doorstep, and every step that follows has a direct impact on both product quality and the environment. As milk moves from villages to processing plants, maintaining its freshness requires energy, especially for cooling and transportation. This is where sustainability becomes crucial.

VLCCs play a vital role as the first critical point in the milk cold chain. It is here that freshly collected milk is cooled and preserved to prevent spoilage and bacterial growth.

In a Village Level Collection Center (VLCC) carbon footprint is largely on how we handle milk cooling, power consumption, water usage and overall operation.

It is very simple in a VLCC,

More Electricity = More Carbon

More Wastage = More Carbon

Poor Practices = More Carbon

In VLCC it included evert watt of electrical energy or every litre of diesel used to keep the milk cooled, usage of water for cleaning the relevant equipment and handling the wastage if any. Although the power consumption in individual VLCC is less but cumulatively it becomes a huge figure as dairy need to cool thousands of litres of raw milk both in morning shift and evening shift every single day.

There is a strong connection between energy use, milk quality, and environmental impact. Efficient cooling systems, proper maintenance of equipment, and disciplined operating practices can significantly reduce electricity consumption while ensuring better milk quality. On the other hand, poor practices lead to higher power usage, more load on refrigeration systems, and unnecessary environmental burden.

Understanding this connection is the first step toward building a more sustainable dairy ecosystem. If this stage is not managed properly, it not only affects milk quality but also leads to higher energy consumption, wastage, and increased emissions, ultimately increasing the carbon footprint.

Reducing the carbon footprint at a VLCC isn’t just a “feel-good” environmental move. It’s a strategy to ensure better milk quality, lower operational costs, and a healthier planet.

In this blog, we will explore practical and effective ways to truly reduce the carbon footprint at VLCCs without compromising on performance, quality, or profitability.

VLCC serves as the primary link between small scale dairy farmers and larger market or milk processor. The main role is to provide a centralised point where local producers can deliver the milk. It plays a crucial role in preserving milk quality through immediate cooling and hygienic handling. Cooling of milk is energy intensive. Without proper management, it can increase operational cost and carbon footprint that leads loss to the farmer.

For efficient management to reduce the energy consumption it is important to first understand where and how energy is used in the VLCC.

Major Energy Consuming Components in a VLCC

Here is the major energy consuming equipment installed in a village collection centre.

1.0 Bulk Milk Cooler (BMC)

Bulk Milk Cooler is an equipment used to cool milk to a preset temperature and store the milk in that temperature within a preset deadband till it is lifted for further processing. Its equipment is designed to cool raw milk from 35°C to 4°C within stipulated time. This is the single largest consumer of energy in a VLCC

 BMC account for 60–70% of total energy consumption of a VLCC

The Energy consumption depends on,

• Initial Milk Temperatures
• Cooling Rate Requirement
• Ambient Conditions
• Quantity of Milk Poured

The refrigeration load increases significantly when milk collection is spread over a long duration.

Refrigeration system with a Compressor and Condenser Fan is an integral part of a BMC.

The energy consumption depends on various factors such as Compressor type, Condenser Cleanliness, Refrigerant charged, Evaporator performance etc. Poor system maintenance can increase power consumption by 15-25%.

1.1 Agitator

 Agitator with speed between 25-30 RPM is fitted in the BMC Tank to ensure uniform temperature distribution and prevent cream separation.

Agitator runs in continuous mode during milk cooling and in a cyclic mode as long as the milk is stored in the tank.

The power consumption for Agitator is very low but an oversized or continuously running agitator wastes energy. Also, long operating hours increase cumulative consumption.

 2.0 Milk Pumps

Milk pump is used to load milk in to the BMC Tank for large capacity (normally 3KLPD and more) BMC. The same pump is also used to load the Road Milk Tanker while dispatching chilled milk for further processing.

Milk Pumps are also used for cleaning operations (CIP systems) in case of a closed tank.

Energy usage of the pump depends on:

• Pump efficiency
• Piping design (pressure drops)
• Frequency of operation

Inefficient pumps or improper piping can lead to avoidable energy losses.

3.0 Lighting & Auxiliary Loads

 Lighting, control panels, and other small equipment contribute a smaller but non-negligible portion.

• Use of conventional lighting (CFL/incandescent) increases load
• Poor switching practices (lights left ON) add to wastage
• Use of Electric Geyser adds on to power consumption

Power requirement & Energy Consumption for VLCC with 1000 LPD BMC is given in the table below for reference. Actual power requirement & consumption will vary from site to site.

 *     Varies with type of compressor & refrigerant use

**   Considering milk is stored overnight with cyclic agitation at 13:2 min

Note: Geyser for Hot Water is not considered. Working hours considered for BMC operating at its full capacity

Inefficiencies Observed at VLCC

Now we have identified and understand energy consumption in a VLCC. While major equipment like BMCs and compressors dominate energy usage, operational inefficiencies and hidden losses often contribute significantly to excess consumption. By identifying these areas, VLCC operators and dairy managers can take targeted actions to improve efficiency, reduce costs, and move toward more sustainable dairy operations.

The inefficiencies can be broadly classified in to two categories.

1. Operational Inefficiencies
2. Hidden Energy Losses

1. Operational Inefficiencies

In real-world VLCC operations, energy inefficiencies often arise not due to design flaws, but due to operational practices and lack of awareness. These are,

• Irregular milk pouring patterns leading to repeated compressor cycling
• Delayed start of cooling after milk collection begins
• Overloading or underutilizing BMC capacity
• Lack of preventive maintenance
• Improper cleaning of condensers and evaporators
• Manual operations without monitoring energy performance

These inefficiencies can increase overall energy consumption by 20–30% compared to optimized operations.

2. Hidden Energy Losses

Beyond visible energy usage, several hidden losses silently increase power consumption and carbon footprint.

a) Heat Gain from Surroundings

• High ambient temperatures in rural areas increase cooling load
• Poor placement of BMC (direct sunlight exposure) worsens the situation

b) Poor Insulation

• Degraded or low-quality insulation in BMC tanks and pipelines
• Leads to continuous heat ingress
• Results in longer compressor running time

c) Frequent Lid/Door Opening

• Each opening introduces warm air into the system
• Causes sudden load spikes on refrigeration system
• Common during frequent milk pouring or inspection

d) Air Infiltration & Leakages

• Improper sealing of tank lids and valves
• Refrigerant leakage reducing system efficiency

e) Inefficient Cleaning Practices (CIP)

• Use of hot water without heat recovery
• Excessive pump operation during cleaning cycles

How to Reduce Carbon Footprint

Reducing the carbon footprint in a VLCC does not require complex technology. It requires disciplined operation, smart equipment choices, and awareness at the ground level. Operational discipline plays a major role in reducing hidden losses.  Also, use of renewable energy sources such as solar power can significantly cut down dependency on electricity and use of Diesel Generator. Training operators and staff to understand energy usage and encouraging them to follow best practices ensures that these improvements are sustained over time. Ultimately, reducing carbon footprint in a VLCC is about combining good engineering with responsible daily practices. We will now discuss few important steps which when taken followed will definitely reduce the carbon footprint leading to lower operating costs as well as a more sustainable dairy ecosystem.

Optimizing Milk Cooling Efficiency

Optimizing milk cooling efficiency is one of the most impactful ways to reduce carbon footprint. The main objective to chill milk to 4⁰C as quickly as possible. This is critical to preserve the milk quality as well as minimizing refrigeration load over time. Many instances we chill milk to 3⁰C to ensure the milk temperature does not reach beyond the desired temperature while reaching at reception dock at the processing plant. This is done to protect the inefficiency of the RMT used and also improper route optimization which takes more travelling time. In return we run the refrigeration system more time thus consuming more energy.

 Prechilling techniques at the source and proper loading practices enables to reduce compressor runtime at chilling centers.

Maintaining the correct balance between milk volume and BMC capacity is equally important. Underloading the BMC leads to inefficient operation, as the system runs with poor heat transfer conditions and unnecessary cycling. Overloading, on the other hand, increases cooling time and forces the compressor to work harder for extended periods.

Thus, the key points to remember are,

• Adopt pre-cooling techniques
• Adopt proper loading practices
• Maintaining correct milk volumes vs BMC capacity

Use of Renewable Energy

In rural area internment power supply causes issue in milk cooling and VLCC. Normally Diesel Generator Set are uses as alternate power source to cool milk. Integrating renewable energy solutions into VLCC operations will be a practical approach. This will eliminate/reduce the use of Diesel Generator Set thus reduces carbon footprint and improve reliability in rural setting.

One of the most reliable and effective intervention is adoption of Solar System or Hybrid System that combines Solar Energy with Grid Power or Diesel Generator. These system harness solar energy during the day to run the refrigeration system significantly reduces dependency on Grid Power.

 Another innovation is use of Thermal Storage System based Milk cooling system where cold energy is produced by operating the refrigeration system when Grid Power is available. The stored cold energy is used to chill milk even when the power is not available. This system completely eliminates the use of Diesel Generator. Promethean Spenta Technology is pioneer in this technology and have installed many such system in VLCC enabling milk chilling without using a drop of diesel.

The combination of Thermal Storage System with Solar System is best suited to reduce further carbon footprint. The Solar Energy produced during day time is used to run the refrigeration system and charge the Thermal Storage System that stores the cold energy. This Cold energy is then used during Milk chilling as and when required. This system completely eliminated the use of Diesel Generator. Promethean Spenta Technology the pioneer in Thermal Storage System based Milk Cooling has successfully integrated their system with Solar Energy has benefitted many VLCC where getting Grid power is a challenge.

The benefits of such renewable and storage-based systems are especially pronounced in rural and power-deficient areas.

 The initial investment in solar and thermal storage systems will be higher, but the return on investment (ROI) is attractive over the long term. Savings from reduced electricity and fuel consumption, lower maintenance costs, gives to a favourable payback period.

 Thus, the key points to be remember are

• Solar with Thermal Energy based BMCs
• Benefits in rural and power-deficient areas
• ROI and long-term sustainability impact

Improving Equipment Efficiency & Maintenance

Efficient operation and proper maintenance of equipment is another effective way to reduce energy consumption and carbon footprint in a VLCC. In many cases operator is more focused in production and ignores regular maintenance schedule. Regular maintenance of cooling equipment can significantly improve performance, reduce electricity bills, and increase equipment life.

In refrigeration systems, heat exchangers such as evaporators and condensers play a vital role in transferring heat efficiently. Over time, heat transfer surfaces such as condensers, evaporators, and cooling coils tend to accumulate dirt, scale, and other deposits, which reduce their ability to transfer heat efficiently. This resulted in compressor to run for longer time and consumes more power. Regular cleaning and descaling help restore performance, allowing the refrigeration system to cool milk faster with less power input.

Charging correct quantity of refrigerant is important for efficient performance. An under charged system will take more time to cool the milk and increases the compressor running time. An overcharged system will result in high pressure thus more current will be drawn by the compressor.

Similarly, unhealthy compressors with worn-out components, poor lubrication, or abnormal vibration consume more power and are subject to breakdowns. Regular inspection of suction pressure, discharge pressure, oil condition, and compressor noise helps in identifying problems at an early stage and maintaining efficient operation.

Insulation another important area must be maintained properly to reduce hidden cooling loss. Damaged or poor insulation allows external heat from the surrounding to enter the milk cooling system continuously. Damaged, wet, or deteriorated insulation results in increase in refrigeration load and compressor running time. Even small gaps or exposed sections in pipelines can lead to substantial energy losses over time. Routine inspection and timely replacement of damaged insulation materials help preserve cooling efficiency and maintain stable milk temperatures with lower energy input.

In simple terms, well-maintained equipment consumes less electricity, provides better cooling performance, reduces operational interruptions, and contributes directly to lowering the carbon footprint of the VLCC.

Thus, the key points to be remember are

• Regular cleaning and descaling of heat transfer surfaces
• Ensuring proper gas charge and compressor health
• Insulation maintenance (tank, pipelines)

Reducing Water and Resource Waste 

Water is used for cleaning milk tanks, lab apparatus & utensils, washing cans and operating CIP system. It is one of the most important resources in VLCC. Excessive use of water increases operating cost and carbon footprint for running the water pump longer time. Similarly minimizing or reducing water consumption will affect the hygiene standards. Hence a proper water management is essential.

An efficient CIP (Cleaning-In-Place) system and standardised cleaning procedure reduces wastage of water. Many operators believes that use of more detergent and chemicals will keep the equipment cleaned. But this myth leads to use of more water for rinsing the equipment. Hence a proper does of detergent & chemicals and required temperature of water used for cleaning in more important to reduces use of excess water.

A large quantity of water used in dairy cleaning processes can still be reused for secondary applications. For example, final rinse water from one cleaning cycle can be collected and reused for initial rinsing, floor cleaning, or utility washing.

At many village-level centres, reusable water is simply discharged as waste due to lack of awareness or storage arrangements. Simple water collection systems and proper planning can help reduce fresh water consumption considerably. Recycling rinse water not only conserves water resources but also reduces the energy required for pumping and heating fresh water.

Water and energy are closely connected in dairy processing operations. Every litre of water used requires energy for pumping, heating, storage, and disposal. Similarly, wastewater treatment also consumes energy.

Adopting better cleaning practices, reusing water wherever possible, and avoiding unnecessary resource consumption, VLCCs can significantly reduce both operational costs and environmental impact while maintaining high standards of milk hygiene and quality.

Thus, the key points to be remember are

• Efficient CIP (Cleaning-In-Place) practices
• Recycling of rinse water where feasible
• Avoiding overuse of chemicals

Digital Monitoring and Data-Driven Decisions

Smart monitoring and data driven decision making plays an important role in today’s dairy industry. With easily availability of affordable digital technologies, it has become possible today to monitor operations in a VLCC more effectively and reduce unnecessary energy consumption. The IoT based technology enables monitoring real time important parameters such as milk temperature, compressor run hours, power consumptions etc.

Digital data also helps in identifying hidden inefficiencies that are often ignored in daily operations. For example, a Bulk Milk Cooler (BMC) may start consuming more electricity due to dirty condensers, refrigerant leakage, poor insulation, or frequent opening of the tank lid. Without monitoring, such problems may continue for months unnoticed. However, when energy and temperature data are regularly analysed, abnormal patterns become visible. This allows operators and service teams to take corrective action at the right time. As a result, the system runs more efficiently, electricity bills reduce, and equipment life improves.

Remote monitoring is another powerful advantage of digital technology in VLCC operations. Service engineers and plant managers are able to monitor system performance from a central location without visiting the site frequently. Alerts and notifications are generated automatically if temperature rises above the safe limit or if energy consumption becomes abnormal. This helps in faster troubleshooting and reduces unnecessary travel for service visits, thereby lowering fuel consumption, operational expenses, and overall carbon emissions.

Digital monitoring and further analysis help the management to compare energy consumption, cooling efficiency, milk temperature maintenance, and equipment performance across different locations. This comparison helps identify the best and suitable equipment manufacturer to procure better equipment for their future requirement.

In the coming years, digital monitoring will not remain an optional feature but will become an essential part of sustainable dairy operations. A VLCC that uses data intelligently can reduce energy waste, improve milk quality, lower operational costs, and significantly reduce its carbon footprint.

Thus, the key points to be remember are

• Use of IoT for temperature and energy tracking
• Remote monitoring to reduce service visits
• Benchmarking performance across VLCCs

Training and Behavioural Change at Operator Level

Technology alone cannot reduce the carbon footprint of a VLCC. The role of a BMC operator is very important in energy conservation. A Bulk Milk Cooler can perform efficiently only when it is operated with care and discipline. The operator is the first person who can notice small losses and prevent unnecessary energy waste.

Simple operational habits can greatly reduce unnecessary energy losses. One of the most common mistakes seen in the VLCC operation is that the lid is kept fully or partially opened after milk pouring or inspection. This allows more ambient air to enter in to the tank thus delay in milk cooling.

Similarly, operators should avoid frequent switching ON and OFF of the refrigeration system. Repeated starting of compressors consumes more power and may also reduce compressor life. Instead, the cooling system should be operated as per recommended procedures and loading conditions.

Regular monitoring of milk temperature is another essential practice. Operators should frequently check and record milk temperature to ensure proper cooling performance. If temperature deviations are noticed early, corrective action can be taken before excessive energy is consumed or milk quality is affected. Maintaining temperature logs also helps identify system inefficiencies and operational issues at an early stage.

Frequent training to operators is essential to adopt the best practices. Building a sense of ownership and accountability among operators is equally important. Training makes the operators feel that the equipment belongs to them in a practical sense, so they handle it with more care. They become more alert about waste, more punctual in maintenance, and more serious about following operating instructions.

A well-trained and responsible operator does not just run the BMC; he helps protect milk quality, reduce power consumption, and support the overall sustainability of the VLCC.

Thus, the key points to be remember are

• Role of BMC operators in energy conservation
• Simple habits by training
• Building ownership and accountability

Practical Roadmap for VLCCs

Reducing the carbon footprint of a VLCC does not happen in one day. It needs a clear and practical roadmap. The best approach is to start by understanding where energy is being used, then fix the wasteful practices first, and finally move toward better technology and regular monitoring. When this process is followed step by step, a VLCC can save electricity, lower operating cost, and improve overall efficiency without affecting milk quality.

 Energy Audit

The first and most important step is conducting an energy audit. An energy audit helps in identifying where electricity is being consumed and where losses are occurring. In a VLCC, the audit should focus mainly on the Bulk Milk Cooler (BMC), refrigeration compressors, pumps, agitators, and lighting systems.

The audit should include:

• Daily electricity consumption
• Milk quantity handled
• Compressor running hours
• Refrigerant condition
• Condenser cleanliness
• Insulation condition
• Ambient temperature
• Operating practices followed by staff

The purpose of the audit is not only to collect data but also to understand inefficient practices that increase energy usage. Even a simple monthly review can reveal abnormal power consumption trends and hidden losses.

Identify Quick Wins

After the audit, the next step is identifying “quick wins.” These are simple corrective actions that require little or no investment but provide immediate energy savings.

Some common quick wins in VLCCs include:

• Cleaning condenser coils regularly
• Switching OFF unnecessary lights and equipment
• Reducing frequent opening of BMC lids
• Repairing refrigerant leaks
• Maintaining proper milk loading schedules
• Ensuring proper ventilation around condensing units

These small actions can improve system efficiency significantly. In many VLCCs, proper maintenance alone can reduce electricity consumption by 10–15%.

Implement Low-Cost Improvements

Once the quick improvements are completed, VLCCs should focus on low-cost efficiency measures that provide long-term benefits.

Examples include:

• Replacing conventional lights with LED lighting
• Improving insulation of milk pipelines and tanks
• Installing automatic temperature controllers
• Using timers for agitator operation
• Optimizing water usage during cleaning processes
• Providing operator training on energy-efficient practices

Staff awareness is extremely important. Many energy losses happen simply because operators are not trained to understand the impact of daily operational practices.

Invest in Technology Upgrades

For long-term sustainability, VLCCs should gradually invest in energy-efficient technologies. Though these upgrades require investment, they offer substantial savings in electricity consumption and maintenance costs over time.

Some important technology upgrades are:

• High-efficiency compressors
• Variable Frequency Drives (VFDs) for pumps and agitators
• Energy-efficient condensing units
• Solar power integration
• Heat recovery systems
• Smart monitoring and automation systems
• Pre-cooling systems for milk chilling

Modern refrigeration systems can reduce power consumption considerably while improving cooling performance and milk quality preservation.

 Energy efficiency is not a one-time activity. Continuous monitoring is essential to maintain performance and avoid energy wastage in the future. Simple record-keeping and periodic reviews help detect problems early before they become major energy losses. Continuous monitoring also helps management evaluate whether implemented improvements are delivering expected results. A VLCC that continuously tracks its performance develops a culture of energy awareness and operational discipline, which ultimately contributes to lower carbon emissions and better profitability.

Download a sample Energy Audit Format for quick reference.

Conclusion

Reducing the carbon footprint in a Village Level Collection Centre (VLCC) is now not just an environmental responsibility. It is has become an operational necessity. It is not a difficult task when approached step by step.

As discussed throughout this blog, major energy-consuming systems like Bulk Milk Coolers, compressors, pumps, and refrigeration equipment contribute significantly to electricity consumption at the village level. Along with this, operational inefficiencies, poor maintenance practices, heat gain, and hidden energy losses further increase both operating costs and environmental impact.

The good news is that substantial improvements can be achieved through simple and practical measures. Regular energy audits, proper maintenance, operator awareness, low-cost improvements, and gradual adoption of energy-efficient technologies can help VLCCs reduce power consumption considerably. Even small changes in daily operating practices can create a meaningful impact when implemented consistently.

Though an individual VLCC may appear small, thousands of VLCCs operating across the dairy sector collectively consume a large amount of energy every day. Even small improvements at each center can create a huge positive impact on energy conservation and environmental protection.

As the dairy industry continues to grow, the responsibility to reduce carbon emissions also grows with it. Every unit of electricity saved, every refrigeration loss prevented, and every efficient practice adopted contributes toward a greener and more sustainable future.

The real transformation begins when rural operators, technicians, and dairy managers become aware of energy-efficient practices and take ownership of implementing them. Empowering people at the grassroots level is the key to building a sustainable dairy ecosystem for the future.

The future of the dairy industry will depend not only on increasing milk production but also on how efficiently and responsibly we handle every litre of milk. By adopting energy-conscious practices today, VLCCs can play a major role in building a greener, more sustainable, and economically stronger dairy ecosystem for tomorrow.

Efficient cooling is not just about saving milk, it’s about saving the planet.

The writer of this blog is author of the book “OMC of BMC”, a book on Operation, Maintenance & Cleaning of Bulk Milk Cooler.