Food Safety and Quality. Gerrit van Duijn
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1 Food Safety and Quality Gerrit van Duijn 1
2 Presentation overview Food safety in the traditional supply chain Supply chains overview - Seed oil supply chain - Palm oil supply chain - Oil refining Food safety control of crude oils Refining process validation for contaminant reduction 2
3 Traditional supply chain
4 Traditional supply chain - as flowsheet Harvesting Crushing Pressing Seed reception Refined oil transport Refining
5 Exercise List food safety risks of the traditional supply chain.
6 Traditional Palm oil mill
7 Presentation overview Food safety in the traditional supply chain Supply chains overview - Seed oil supply chain - Palm oil supply chain - Oil refining Food safety control of crude oils Refining process validation for contaminant reduction 7
8 Seed oil supply chain Oil seed farmers Seed control Oil seed storage Seed control Seed control Meal Oil extraction Crude oil control Acid Oil Oil Processing Consumer goods manufacturers Product control
9 Seed reception, sampling and storage 9
10 Seed oil extraction Warehouse or silo s Optional dryer Truck scale Oil seed vessel Batch scale Oil seed receiving Steam Quality control Impurities Oil content Moisture Hexane Electro magnet Day bin Pressing Seed preparation De-hulling for sunflower Press % oil Cooker C Meal storage Desolventizer/ toaster Extractor Oil filter Distillation Condensation Extracted oil Crude oil Pressed oil Crude lecithin Degumming Degummed oil Meal storage Solvent extraction Oil treatment/storage
11 Palm oil supply chain Plantations Small holders Kernels Oil extraction Fruit bunch grading Crude oil control Previous cargoes Crude oil control Acid Oil Oil Processing Consumer goods manufacturers Product control
12 Fruit bunch grading
13 Receiving station Palm oil extraction Fresh Fruit Bunches Steriliser Bunch separation Press Sterilizer Settling Tank Fiber/Nut Separator Sludge Fibre Centrifuge Nut Cracker Sludge Palm Oil Storage Press Kernel Dryer Shell To refinery and/or export Kernel Storage To Palmkernel extraction 13
14 Current refining process - introduced in 1900 From decanting to refining due to: Use of coconut oil for margarine Decolouring of cottonseed oil Changing taste Removal of catalyst poisons before hydrogenation. Removal of solvents from extracted oils
15 Basic principles of refining Reaction with acid followed by water extraction and gravity separation. DEGUMMING Reaction with base followed by gravity separation. NEUTRALISATION Agglomeration of fine particles followed by filtration. Adsorption on clay or active carbon followed by filtration. BLEACHING Evaporation of volatile components by steam distillation. DEODORISATION
16 lye soap spent earth earth steam exhaust gases CHEMICAL neutralisation bleaching deodorisation CRUDE OIL Cell residues, Water, Hexane Metals, Dirt Free Fatty Acids Colour, Oxides, PAH Flavours, Pesticides, volatiles REFINED OIL PHYSICAL degumming wet dry bleaching deodorisation acid/water acid/water earth spent earth steam acid oil exhaust gases
17 Presentation overview Food safety in the traditional supply chain Supply chains overview - Seed oil supply chain - Palm oil supply chain - Oil refining Food safety control of crude oils Refining process validation for contaminant reduction 17
18 Quality control of incoming fats
19 Case: Which hazards should we analyze crude oils for? Sulphuric acid Poly Aromatic Hydrocarbons Lubricant oil Glass particles Pesticides Iron Dioxin Natural toxins Micro organisms Diesel Hexane Xylene
20 Hazards we should analyze crude oils for. YES: Poly Aromatic Hydrocarbons Pesticides Hexane Diesel Lubricant oil Natural toxins NO: Dioxin Sulphuric Acid Micro organisms Glass particles Iron Xylene (except maiden voyages)
21 Minor components in crude oils effect on quality Minor component Origin Quality effect Free Fatty Acids Hydrolysis Off-taste, smoke during frying Peroxides Oxidation Off-taste Phosphatides Moisture Dirt From cell membranes From oil crop, transport & storage Oil crop and harvest residues Burns at high temperature Components in free water Appearance Taste & odour From oil crop Not matching with product taste Metals Soil, milling storage & transport Catalyst for oxidation
22 Contaminants in crude oils effect on health Contaminant Origin Health effect Heavy metals Poly Aromatic Hydrocarbons Pesticides above MRL Dioxins Soil, milling storage & transport Drying of oil crop Crop protection chemicals Environmental pollution Toxic Carcinogenic, genotoxic Toxic (ADI 100 x MRL) Highly toxic Mycotoxins Mould or fungus Toxic Mineral oil Residues previous cargoes Process, storage, transport Overseas transport Toxicity depends on chain length Depends on component
23 Supply Chain risk assessment: PAH contact during drying with exhaust gasses Sunflower seeds Coconuts
24 Benzo(a)pyrene in Crude Oils Maximum 100 % samples> 1 ppb 79% BaP (ppb) 10 12% 9% Legal EU limit In refined oil 1 7% 0% Coconut Sunflower Rapeseed Soybean Palm oil
25 Pesticides Crop protection during growth Protection of oil seeds during storage and transport Transfer in storage silos
26 Pesticide definitions >100 x Health concern ARfD ADI ARfD ADI MRL LOD DL GAP = Acute Reference Dose = Acceptable Daily Intake = Maximum Residue Limit = Level of Determination = Detection Limit of used analytical method = Good Agricultural Practice MRL LOD DL GAP Seed Crude oil Refined oil Food safety
27 Mineral oil (alkanes) <C6: Gas C6: Hexane C5 C8: Gasoline C10 C24: Diesel >C16: Fuel and lubricant oil >C35: Asphalt Allowed use: Hexane in crude extracted oil Paraffin oil to prevent dust explosions in USA Solvent for pesticides
28 Risk for mineral oil contamination
29 Pesticides Crude Oil Risk Matrix PAH Mineral oil in edible oil imported in EU Previous Cargoes in sea going vessels Dioxins and PCB's Aflatoxins EU LIMIT > MRL BaP> 2 ppb Fediol CoP EC/4/2004 EC/1881/2006 EC/1881/2006 > 400 ppb Soybean oil Sunflower oil Rapeseed oil Corn oil Palm oil Palm kernel oil Coconut oil Groundnut oil Fish oil Linseed oil Cottonseed Grape seed Olive Occurrence Monitoring frequency: high risk Regularly (> once a year) Every batch medium risk Occasionally ( every 1-5 years) Minimum once per quarter low risk Seldom (< once every 5 years) Maximum once per quarter regulated Not applicable Every batch (FEDIOL CoP) ZEN
30 Presentation overview Food safety in the traditional supply chain Supply chains overview - Seed oil supply chain - Palm oil supply chain - Oil refining Food safety control of crude oils Refining process validation for contaminant reduction 30
31 Refining process validation for contaminant reduction The refinery, processing the oil, is informed and the contaminated lot must be blocked. The standard refining process is validated for contaminant removal to below acceptable limit by: - processing a minimum batch with the standard refining recipe - analyzing the contaminant level in the refined oil. Result < limit: the crude oil is de-blocked and the full lot can be processed. Result > limit: repeat validation with modified process conditions or declassify to non food. Repeat validation if contaminant level is higher in a next delivery.
32 Refining link table - contaminants Contaminants Hydrocarbons < C20 Hydrocarbons > C20 PAH (BaP) Pesticides Aflatoxin B1 Zearalenone Crude oil reception Degumming Neutralization 93% Bleaching 77% Deodorization = Chemical refining = Physical refining = Chemical and Physical 32
33 Enrichment in deodorizer distillate Example Dioxin: Bleached oil = 1000 kg FFA = 2 % = 20 kg Dioxin level = 0.1 ng TEQ/kg = 100 ng TEQ Deodorized oil = 977 kg FFA = 0.1 % = 1 kg Dioxin = not detectable Deodorizer distillate = 23 kg FFA = 19 kg = 83 % of distillate Dioxin = 100 ng TEQ = 4.3 ng TEQ/kg Limit for food and feed = 0.75 ng TEQ/kg 33
34 USE OF OIL/FAT AND BY-PRODUCTS Contaminant Dioxin PAH Process and product All Coconut Others Crude or degummed oil/fat Tank bottom from storage Physically refined oil Deodorizer distillate PR Chemically refined oil Soapstock and acid oil Deodorizer distillate CR = food and feed = feed, monitoring every 3 month = feed, 100 % monitoring = not allowed in food and feed
35 The refiner s challenge Product quality Contaminant removal refining process Conditions Minimal side reaction products And reduced environmental impact!
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