Thank you for writing to us. One of our executive will reach back to you through your submitted medium. In case there’s an urgency, feel free to connect over WhatsApp for faster response.
Prefer calling? Dial +918045132187 (International callers) or 08045132187 (Indian callers).
The spentwash Challenge in Modern Distilleries
In the wake of India’s E20 Ethanol Blending Mandate and the global push for sustainability, the ethanol industry is booming. However, this growth brings a massive environmental hurdle: Spentwash. Also known as vinasse or distillery slop, spentwash is the dark, viscous, and highly acidic liquid left after the distillation of molasses or grain.
With a high BOD (Biochemical Oxygen Demand) and COD (Chemical Oxygen Demand), untreated spent wash can devastate local ecosystems. Raj Process Equipments provides the definitive solution with our Next-Generation Spent wash Dryers, designed to achieve 100% Zero Liquid Discharge (ZLD) while creating a revenue-generating by-product.
Why Traditional Waste Management is Failing
For decades, distilleries relied on “Lagooning“ or dilution. These methods are no longer viable in 2026 due to:
Strict Regulatory Norms: CPCB and SPCB have mandated absolute ZLD for all distilleries.
Groundwater Contamination: Leaching of salts and organic matter into the water table.
High Land Footprint: Massive lagoons occupy valuable industrial land.
Odor and Public Health: Foul smells lead to community friction and legal liabilities.
The Raj Process Spentwash Dryer eliminates these issues by reducing waste volume by over 80%, converting a problematic liquid into a dry, easy-to-handle powder.
The Raj Process Spentwash Drying Mechanism
Our system is not a simple heater; it is a sophisticated thermal engineering platform.
1. Advanced Evaporation & Concentration
Before drying, the spentwash is concentrated in our Multi-Effect Evaporators (MEE) or Mechanical Vapor Recompression (MVR) systems. This reduces the moisture content to a level where thermal drying becomes highly energy-efficient.
2. Thermal Drying & Solidification
The concentrated wash is fed into the Raj Process Dryer. Utilizing controlled hot air or steam, we flash-dry the material. The result is a fine, free-flowing powder that retains all the nutrient value of the original waste but without the water weight.
3. Patented Energy Recovery
Energy is the highest cost in drying. Raj Process systems are engineered with Waste Heat Recovery (WHR) units. We recycle the latent heat from the exhaust vapors to pre-heat the incoming spentwash, cutting fuel costs by up to 25%.
4. Emission & Odor Control (The Scrubber System)
To address the “foul odor“ problem, our dryers are equipped with integrated venturi scrubbers and activated carbon filters. This ensures that the air released into the atmosphere is clean, odorless, and compliant with air quality standards.
The Economic Value – Waste into Resource
1. Production of Bio-Potash Fertilizer
The dried powder from a Raj Process dryer is a “Gold Mine.“ India currently imports a vast majority of its Potash. By drying spentwash, distilleries produce Bio-Potash, which can be sold to farmers or fertilizer companies at lucrative rates (₹15,000 to ₹25,000 per tonne).
2. Fuel Substitution
In certain plant configurations, the dried solids have a Calorific Value of approximately 2,200 to 2,500 kcal/kg. This allows the powder to be co-fired in the distillery's boiler, reducing the consumption of expensive coal or bagasse.
3. Drastic Logistics Savings
By reducing the volume of waste by over 80%, the cost of transporting waste for composting or disposal is virtually eliminated. 100 truckloads of liquid waste are reduced to just 20 truckloads of high-value powder.
Chapter 5: Why Choose RAJ Process Equipments?
1. Proven Large-Scale Track Record:
We have successfully commissioned some of the largest spentwash drying units in Asia and South America. Our systems are not theoretical; they are field-proven assets.
2. Turnkey EPC Capability:
We provide everything from the initial chemical analysis of your spentwash to the final packaging unit for the dried powder.
3. Compliance Assurance:
Our systems are designed to help you meet the most stringent Zero Liquid Discharge (ZLD) norms, ensuring your distillery stays operational even under strict environmental audits.
4. Advanced Automation:
With real-time monitoring of moisture levels and flow rates, the Raj Process system adjusts itself to variations in spent wash quality, ensuring a consistent final product.
Heating Medium
Flue Gas / Steam / Thermic Fluid // Maximum flexibility based on site utility.
MOC (Material of Construction)
SS 316L / Hastelloy / Carbon Steel // Superior corrosion resistance against acidic wash.
Control System
PLC-SCADA with HMI // Fully automated; minimal manual intervention.
Capacity Range
1 TPD to 200+ TPD // Scalable for small and mega-distilleries.
Inlet Feed Concentration
45% to 60% Total Solids // Optimized for high-viscosity slurries.
A silo is a specialized structure for storing bulk materials such as grain, coal, cement, carbon black, wood chips, and food products. Storage silos are essential equipment in manufacturing, agriculture, mining, and food processing industries.
Raj Process is a leading manufacturer of storage silos in India, offering durable and efficient designs tailored to meet the specific needs of diverse industries. Built with highquality materials and advanced manufacturing techniques, our silos are engineered to withstand harsh industrial environments while ensuring product safety and quality.
Storage Silo Solutions
Raj Process silos are designed to prevent contamination and maintain product integrity. With expertise in spray drying and powder handling, we also provide advanced egg powder production plants capable of drying whole egg, yolk, and albumen. To ensure optimal product quality, separate dryers are recommended for each product type.
Typical Applications
Foodstuffs and flour silos
Chemical silos
Coal silos
Cement and fly ash silos
Grain silos
Ceramic powder silos
Features
Available in bolted, smoothwall, and welded designs
Material options: epoxycoated carbon steel, stainless steel, carbon steel with stainless steel cladding, carbon steel with FRP coating
Designed for durability and safe operation under demanding conditions
Customizable to integrate seamlessly into existing process setups
Raj Process is a leading manufacturer of A.C. & D.C. drive control panels, engineered to deliver efficient control and smooth operation of industrial machinery. Designed with advanced technology, our panels ensure reliable performance, energy savings, and longterm durability across diverse applications.
D.C. Drive Panels
Raj Process D.C. drive panels are ideal for powerintensive applications such as power plants, refineries, steel mills, and sugar mills.
Power ratings: 7.5 KW to 750 KW
Energy savings: Up to 30%
Reliable control over D.C. motors for constant speed operation
Smooth and consistent performance under demanding conditions
A.C. Drive Panels
Our A.C. drive panels efficiently regulate motor speed, making them suitable for:
Pumps
Fans
Conveyors
Mixers
Mechanical equipment requiring precise speed control
Raj Process designs these panels with highperformance motor control systems, converting electrical energy into mechanical output to meet diverse industrial requirements.
Applications
Heavy machinery
Automotive industry
Electronics and telecommunications
Operations requiring high accuracy of movement
Processes demanding maximum stability in motor RPM/speed
Features
Shockproof design for safety
Sturdy construction for durability
Compact design with polished finish
Speed control or constant speed operation
Reliable performance with low maintenance
Raj Process is one of the leading instruments and control panel manufacturers in India, delivering reliable and customized solutions for industrial automation and process monitoring. Our panels are manufactured as per international standards, with ingress protection ranging from IP42 to IP67, ensuring durability and safety in demanding environments.
Instruments & Control Panel Manufacturer in India
We manufacture both flameproof and nonflameproof panels, constructed from carbon steel or stainless steel. Stainless steel panels are finished up to 420 grit, while carbon steel panels are powdercoated using a seventank process for longlasting protection.
Raj Process instruments are designed to provide accurate monitoring and control of parameters such as temperature, pressure, flow rate, and level. Our control panels are highly reliable, easy to operate, and ideal for a wide range of industrial applications.
Product Range
Temperature controllers
Sequential timers
VFD (Variable Frequency Drive) panels
By integrating advanced technology and sophisticated control systems, Raj Process enhances operational efficiency, safety, and automation across industries. Precise monitoring and adjustment of parameters ensure optimized performance and quality control.
Applications
Pharmaceutical industry
Food & beverages
Chemical industry
Cement industry
Ceramic industry
Fertilizers
Minerals
Biochemicals
Features
Simple operation
Sturdy construction
Safe and reliable
Low maintenance
Durable design
Withstands extreme weather conditions
Electrical & Automation
product-detail-entry-exit
S. no. 140/1, 14th Pune-Bangalore highway, Sadananda Business Center, Baner