Amritsar district has two sugar mills: Rana Sugars at Buttar Seviyan, operational since 1993 with a capacity that has expanded over the years, and Ajnala Cooperative Sugar Mill at Bhala Village, with a daily crushing capacity of 25,000 quintals. This season, Ajnala has been running below capacity — reports from early 2025 showed the mill crushing around 15,000 quintals per day instead of its rated 25,000, due to labour shortages and aging machinery. That operational reality has a direct hygiene consequence: when a mill crushes less cane per day, cane sits longer in the yard, and the time between harvest and crush stretches.
Longer cane residence time means more bacterial growth before the cane even reaches the milling tandem. The mill house — the cane preparation area, the milling surfaces, the juice collecting tanks, and the handling lines — becomes a reservoir for the bacteria that convert sucrose into dextran and acids. Sanitation biocides are not just a cleaning product. They are a control point for the microbial load that enters the process.
In a normal season, cane moves through the mill quickly. The microbial load on the cane has less time to multiply, and the equipment surfaces are flushed by continuous flow. In a slow season, the opposite happens. Cane waits. Juice sits in tanks longer. Equipment surfaces that would normally be scoured by constant throughput develop biofilm. The bacteria that produce dextran — primarily Leuconostoc mesenteroides and related species — thrive in these conditions.
The consequence is not just sucrose loss in the juice. Dextran raises viscosity, which slows evaporation and complicates crystallization. It can also foul heat exchanger surfaces and contribute to equipment corrosion. By the time the juice reaches the boiling house, the damage from a slow crushing season has already been done upstream. Mill sanitation is the intervention point before that damage cascades.
Cane preparation area: The shredder, chopper, and cane carrier are the first surfaces the cane contacts. Spraying or fogging biocide in this area reduces the microbial load on the cane surface before it enters the milling tandem. Patented methods describe dosing biocides during cane preparation to kill a substantial portion of microbes within minutes.
Milling tandem: The mills themselves, the juice collecting tanks, and the maceration water system are points where bacteria accumulate. Dosing into the juice collecting tanks or onto the mills keeps the microbial population in check during extraction.
Juice handling lines: After extraction, juice moves through screens, heaters, and holding tanks before clarification. Each surface is an opportunity for biofilm formation. Sanitation dosing at these points complements the clarification process downstream.
Both oxidizing and non-oxidizing biocides are used in sugar mill sanitation, and the choice depends on the application point and the mill's operating constraints.
Oxidizing biocides, such as hydrogen peroxide-based products, act quickly and break down into non-persistent byproducts. They are useful for shock treatment of surfaces and for applications where a residual antimicrobial effect is not desired. Non-oxidizing biocides, including carbamates and THPS-based products, provide a longer-lasting effect and are often used for continuous dosing in juice handling systems. Published research on sugarcane processing biocides shows that carbamate biocides have broad-spectrum activity against bacterial strains isolated from sugar facilities, while some oxidizing agents have more limited effectiveness against certain strains.
The selection should be based on the specific application: shock treatment of a fouled mill house, continuous dosing in a juice tank, or surface sanitation during shutdown. A single biocide chemistry is rarely optimal for all three.
Sanitation biocides control microbial growth, but they do not reverse the effect of cane that has already degraded before crushing. If cane has been waiting too long in the yard, the sucrose loss has already occurred. Sanitation reduces the additional loss that would happen during processing. It also does not replace mechanical cleaning: biofilm that has established on equipment surfaces needs to be physically removed or chemically dispersed before biocide dosing can be effective.
For Amritsar mills running below capacity, the practical approach is to adjust the sanitation programme to the slower throughput. If cane is sitting longer, the biocide dose or frequency may need to increase, and the mill house cleaning schedule may need to be tightened. The programme that works at full capacity may not be sufficient at reduced capacity.
Standard industrial packing. Pack sizes on request. Store in a cool, dry area away from incompatible chemicals. Refer to the SDS for specific handling and PPE requirements.
We support Amritsar mills with biocide selection for mill house applications, dosing point guidance, and sanitation programme review. We do not claim on-site audits or technical support visits unless confirmed separately for your location.
Q: Why is mill sanitation more critical when a mill runs below capacity?
A: When a mill crushes less cane per day than its capacity, cane sits longer in the yard and in the preparation area. Longer residence time gives bacteria more opportunity to multiply on cane surfaces and in residual juice on equipment. Ajnala Cooperative in Amritsar was reported to be crushing 15,000 quintals per day against a capacity of 25,000, which extends the time between cane arrival and crushing.
Q: Where should biocide be dosed in a sugar mill for best sanitation results?
A: Biocide dosing points typically include the cane preparation area (before or during shredding), the milling tandem (in juice collecting tanks or on the mills), and the juice handling lines before clarification. The goal is to reduce microbial load at the source, before bacteria have time to convert sucrose to dextran and other polysaccharides.
Q: What is the difference between mill sanitation and juice preservation biocides?
A: Mill sanitation focuses on the equipment and environment: cane preparation surfaces, milling tandem, juice tanks, and handling lines. Juice preservation focuses on the juice stream itself after extraction. The two overlap, but mill sanitation is about reducing the microbial load that enters the process, while juice preservation is about controlling what is already in the juice.
Q: How does cane residence time affect microbial load in Amritsar mills?
A: Cane that has been harvested and left waiting carries higher bacterial loads, especially Leuconostoc species that produce dextran. In a slow crushing season, the time between harvest and crush extends, and the microbial load entering the mill increases. Sanitation biocide dosing and faster cane turnaround both help, but the biocide programme should be adjusted for the higher load.
Call +91-9312871070 to discuss your mill sanitation requirements.
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