Wastewater treatment in food industry

Size: px

Start display at page:

Download "Wastewater treatment in food industry"

Edmund Park
7 years ago
Views:

1 Wastewater treatment in food industry Slide 1

2 What is the difference to municipal wastewater treatment High concentrations of BOD/ COD Mismatch of ratio C:N:P (ideal BOD: nitrogen: phosphorus ratio is about 100: 5:1) High fat contents High solids contents Acidic or alkaline water High flow rate variation due to shift working High load variation due to shift working High salinity Slide 2 Disinfection residuals Pesticides and herbicides

3 Factors influencing the ph the natural ph of the raw material ph adjustment of fluming water to prevent raw material deterioration use of caustic or acid solutions in processing operations use of caustic or acid solution in cleaning operations acidic waste streams (e.g. acid whey) acid-forming reactions in the waste water (e.g. high yeast content waste water, lactic and formic acids from degrading milk content) nature of raw water source (hard/soft). Slide 3

4 Typical values of municipal wwtp Component suspended solids BOD5 COD Nitrogen Ammonium Phosphorus Range in mg/l mg/l mg/l mg/l mg/l mg/l 2-15 mg/l ph 6-8 Slide 4

5 Example of wastewater compounds: Fish processing Production wastewater Suspended solids BOD5 FAT m³/t mg/l mg/l mg/l Herring , Fresh fish ~ , Slide 5 Smoking of fish salting of salmon deep frozen fish Marinated fish ~ , ~ ,03-1, ~2 ~ ,5-2,

6 Example of wastewater compounds: fruit and vegetables BOD < 500 mg/l BOD mg/l Product TSS mg/l Product TSS mg/l citrus 130 asparagus broccoli apple juice 104 strawberry baby food brussels sprouts cauliflower dehydrated veggies leafy greens peeled tomatoes tomato products Slide 6

7 Example of wastewater compounds: fruit and vegetables BOD mg/l Product TSS mg/l frozen potatoes dried potatoes 981 apricots mushrooms BOD mg/l Product TSS mg/l carrots grape juice peas potato crisps peaches plums Slide 7 Product BOD mg/l TSS mg/l dried fruit jams, jellies + preserves pears Product BOD > 5000 mg/l TSS mg/l beetroot sweet corn white whole potato

8 Example of wastewater compounds: dairy Component Range in mg/l Average in mg/l suspended solids Total solids BOD Protein Fat Carbohydrate Nitrogen Phosphorus Sodium Chloride Calcium Magnesium Potassium Slide 8 ph 5,3-9,4 7,1 Temperature C 24 C

9 Example of wastewater compounds: vegetable oil Source Volume 1 m³/t BOD5 mg/l COD mg/l FOG 3 mg/l SS 4 mg/l Neutral oil washing 0, no data Neutralization reaction ph , Barometric condensors ph 6,5-7, Steam boiler Water softening Floor and equipment cleaning 10% of steam 5% of steam , no data 300 Slide 9 1: tonnes of crude oil 2: tonnes of free fatty acids 3 FOG: fat, oil and grease 4 SS: suspended solids

10 Example of wastewater compounds: beverage type of wastewater BOD5 (mg/l) SS (mg/l) ph Soft drinks sweet lemon ,95 Coca Cola ,4 Pepsi Cola ,5 Juices Tomato ,1 Pineapple ,15 Slide 10 Orange ,5 Lemon ,4

11 What is the difference to municipal wastewater treatment Conventional wwtp on site or discharge into municipal wwtp Preliminary treatment e.g. -neutralization -fat and grease removal Slide 11 -SS removal -Anaerobic treatment

12 Wastewater treatment options in food (1.1) mechanical preliminary treatment process breweries dairies vegetable oil and fat distilleries and spirits bar rack and screening Filtration Sedimentation () () Floatation, gasoline separator, fat trap Centrifugation mixing and equalizing Slide 12

13 Wastewater treatment options in food (1.2) breweries dairies vegetable oil and fat distilleries and spirits physico-chemical preliminary treatment process precipitation, flocculation, coagulation, filtration neutralization biological pretreatment aerobic anaerobic Slide 13

14 Wastewater treatment options in food (1.3) Full biological treatment breweries dairies vegetable oil and fat distilleries and spirits single stage ASP multi stage ASP SBR Biofilters Sealed aerated lagoons ASP: Activated sludge process Slide 14

15 Wastewater treatment options in food (2.1) mechanical preliminary treatment process starch sugar soft drinks, fruit juice malt bar rack and screening Filtration Sedimentation Floatation, gasoline separator, fat trap Centrifugation mixing and equalizing Slide 15

16 Wastewater treatment options in food (2.2) starch sugar soft drinks, fruit juice malt physico-chemical preliminary treatment process precipitation, flocculation, coagulation, filtration neutralisation biological pretreatment aerobic anaerobic Slide 16

17 Wastewater treatment options in food (2.3) Full biological treatment starch sugar soft drinks, fruit juice malt single stage ASP multi stage ASP SBR Biofilters Sealed aerated lagoons ASP: Activated sludge process Slide 17

18 Wastewater treatment options in food (3.1) mechanical preliminary treatment process meat wine / sparkling wine sugar potato fruit and vegetable bar rack and screening Filtration Sedimentation Floatation, gasoline separat., fat trap Centrifugation Slide 18 mixing and equalizing

19 Wastewater treatment options in food (3.2) meat wine / sparkling wine sugar potato fruit and vegetable physico-chemical preliminary treatment process precipitation, flocculation, coagulation, filtration neutralization biological pretreatment aerobic anaerobic Slide 19

20 Wastewater treatment options in food (3.3) mechanical preliminary treatment process meat wine / sparkling wine sugar potato fruit and vegetable single stage ASP multi stage ASP SBR Biofilters Sealed aerated lagoons Slide 20 ASP: Activated sludge process

21 Pre-treatment: Neutralization Slide 21

22 Pre-treatment: grease and grit removal Slide 22

23 Pre-treatment: Flocculation and sedimentation Slide 23

24 Pre-treatment: Floatation Slide 24

Brewery Wastewater: 2010 Water and Wastewater Conference. 11.02.2011 Page 1

Brewery Wastewater: 2010 Water and Wastewater Conference. 11.02.2011 Page 1 Brewery Wastewater: Solutions for the Problem By Fred M. Scheer 2010 Water and Wastewater Conference Madison, WI 11.02.2011 Page 1 vr74 What We Will Discuss: Biochemical i Oxygen Demand (BOD): Where does