Miller Magazine Issue 107 / November 2018

59 MILLER / NOVEMBER 2018 COVER STORY chemical and physical contaminants, such as employees lubricants, fuel, pesticide, cleaning compounds, saniti- zing agents, floor splash, aerosol, mist etc. Flour can be considered ‘adulterated’ if they become contaminated by such substances. Any flour product, component and/or ingredient is de- emed to be adulterated if it meets the definition of an adulterated food under Section 402 of the Food Drug and Cosmetic Act and its related regulations under 21 CFR. clean & sanitary practices of Flour handling & transportation because the adulterant ‘may’ be present due to improper sanitary practices. Foods processed in unsanitary conditions-these [handling, transportation, packaging materials] direct contact surfaces can be con- sidered adulterated even without any evidence or mea- sures of a contaminant. If it food has been prepared, packed, or held under insanitary conditions whereby it may have become con- taminated with filth, or whereby it may have been ren- dered injurious to health Protection from adulteration can be a 3-step process - before, during and after processing best-accomplished practices: After processing finally, the processor cannot be responsible for all possible sources and causes of adulte- ration after the product leaves the processing operation, but prior considerations could influence product adulte- ration after processing. Selection of packaging materials, packaging integrity, cleanliness of transportation trucks, and further handling instructions can prevent potential contamination from these: biological, microbial, pests, and chemical, adulteration by persons and conditions used in distribution, transport, storage, etc. The effort to produce a safe and wholesome food pro- duct, SSOP, Pre-requisite programs essential implement during these three periods to assurance critical areas are covered and to prevent what could lead to a complicated (HACCP) system with much critical control points befo- re implement ISO 22000, HACCP systems, ISO 22005. Nevertheless all those invested hygiene schemes useless, entail know-how latest pneumatic convey technology transportation uses in flour industry sector. Many factors can play in transporting different food products. The bulk food transports dry or liquid products can be shipped via trailer or rail car. There are special categories of food that should be closely evaluated and may require additional measures to ensure product sa- fety. This includes liquid egg, juice, and dairy. Dry produ- cts may consist of flour, sugar, salt, starch etc. What is Pneumatic Conveying dry bulk handle and transport? In many industrial processes where raw material are required in bulk, pressure discharge truck used to transport them from the supplier’s warehouse or mine to the processing plant or final destination. As the imp- lies, pressure discharge trucks unload their contents by means of a pneumatic conveying system and transport it through a pipeline into storage silo and hence, it is less expensive overall when large quantities of materials are being transported in bulk on a regular basis. Pneumatic conveying represents an important topic in engineering and is encountered in a variety of industri- al processes, chemical, pharmaceutical, food, glass, ce- ment, plastics, mining, ports etc. Widely used in flour industry to handle and transport dry and free-flowing powdered and granular material because it is suitable for variety processes. Fine particles of lees 1 micron, as well as 15 mm rocks, can be conve- yed vertically and/or horizontally from distances of few meters to a few kilometers at rates of hundreds of tons per hour requires less control and maintenance, and it is cleaner easier to automate. Great progress bulk transport improves the hygiene of production systems totally enc- losed, and dust generation is minimized. Settling chambers, bag filter, reverse-jet filters and Hepa absolute filters, depending mainly material charac- teristics, while the conveying gas is usually air at ambient conditions, other gases may be used such as nitrogen and carbon dioxide in applications where there exists a risk of explosion or health and hazards. Flow problems PD trucks represent a unique class of pneumatic conveying systems because of the mobile na- ture of the “feed system.” Self-unloading truck arrives with own blower and operator and connects to a fixed system at the plant. More air flow leads to faster transfer rates in system constrained by an upper-pressure limit and fixed piping, this logic often leads to less efficient conveying and prob-