Using the eight-roller mill in the purifier-less mill flow.

Area of Science:

• Agricultural Engineering
• Food Processing Technology

Background:

• Conventional wheat flour milling involves multiple stages, including intermediate sieving and purification, which contribute to significant capital costs.
• The eight-roller milling system presents an alternative approach, potentially reducing costs through double grinding without intermediate sieving.

Purpose of the Study:

• To investigate the performance of an eight-roller milling system in a purifier-less wheat flour mill flow.
• To compare the milling results of the eight-roller system with a conventional milling system.

Main Methods:

• Middlings from a commercial flour mill's break system were used for experiments.
• Double grinding of middlings using the eight-roller mill was compared to conventional regrinding after intermediate sieving.
• Flour yield and quality (ash content) were analyzed under identical roll gap and sieving conditions.

Main Results:

• The eight-roller system produced less flour than the conventional system at equivalent settings.
• Increasing the upper size limit of flour by widening sieve apertures enhanced flour yield in the eight-roller system.
• Higher flour particle size limits correlated with decreased ash content, indicating no quality deterioration.

Conclusions:

• The eight-roller milling system can be effectively implemented in a purifier-less mill flow.
• Adjusting sieve aperture is a key strategy to optimize flour yield in the eight-roller system.
• This milling approach offers a cost-effective alternative for wheat flour production without sacrificing flour quality.