Waste utilization from tuber processing industry every industry after processing there will be large amount of waste. These waste in the form of byproduct utilization we are able to decrease the waste at the same time new products can be developed.

1. Waste utilization
from tuber
processing industryPresented by,
Reshma C (2015-06-019)

2. WASTE:
 It is any unwanted, undesirable, discarded or intended to be
discarded material left over the
Completion of a certain process.
 Also referred to as rubbish, garbage, trash or junk.
 Food processing industry are divided in to many divisions and
among them an important industry is tuber industry.

3. Tubers
 Enlarged structures
 storage organs for nutrients
 used for the
plant's perennation (survival of the
winter or dry months)
 to provide energy and nutrients for
regrowth during the next growing
season
 As a means of asexual reproduction
 Common plant species with stem
tubers include potato and yam
 Examples of modified lateral roots(root
tubers) are sweet potato, cassava,
and dahlia.

4. Potato processing
 Potato processing waste leads to pollution
 Peeling leads to removal of some starch
along with peels
 Integrated production of bioethanol and bio
manure
 1step:Ethanol production from potato peel
and mash waste by employing co-culture of
Aspergillus niger , Saccharomyces cerviciae
at various incubation time (24–120 h) instead
of application of enzymes.
 The solid state fermentation of potato peel
and mash inoculated with co-culture,
resulted in bioethanol production of 6.18%
(v/v) and 9.30% (v/v) respectively.
 In the second part of the work, the residue
obtained after ethanol production was
inoculated with seven different
microorganisms (Nostoc
muscorum, Fischerella
muscicola, Anabaena variabilis, Aulosira
fertilissima, Cylindrospermum
muscicola, Azospirillium
lipoferum, Azotobacter chroococcum) and
mixture of all the organisms in equal ratio
for nitrogen (N), phosphorous (P) and
potassium (K) enrichment.
 Among them, A. variabilis was found to
enrich N, P and K content of the residue by
nearly 7.66, 21.66 and 15 fold than that of
the initial content, ultimately leading to
improved N:P:K ratio of approximately 2:1:1

5. Flow chart of waste utilization in potato industry

6. Schematic representation of biomanure production from
potato waste

7. Cassava industry
 Low value cassava waste have been converted to bio-
sorbents which can remove toxic and valuable metals
from industrial waste water.
 Distilled alcoholic beverage with acceptable quantity of
cyanide can be produced from the effluents of cassava
industry.
 Cassava starch powder can be utilized as an alternative
for solidyfying agents such as agar-agar.

8. Ethanol production from cassava-flowchart

9. Cassava industry -Overview

10. Cassava pellets

11. Yam tuber industry

12. Yam powder preparation -flowchart

13. Cocoyam tubers
• The amount of starch is used for production of ethanol and vinegar
• 2 steps:
• 1. alcoholic fermentation: Saccaromyces carlbergensis
• 2. acetic acid fermentation: Acetobacter sp
• Saccarification of gelatinized mash involves 2 stage enzyme hydrolysis
• Bacterial and fungal alpha-amylase to produce fermentable sugars

14. Protein enriched yam powder
• Conventional sources of protein are becoming inadequate for protein-based food supply.Solid state
fermentation (with and without ammonium sulphate) of yam peels was carried out for 96 h,
using Saccharomyces cerevisiae .
• Samples from fermented biomass were collected at 24 h interval for 96 h, oven dried at 60 °C, cooled,
milled and assayed for chemical and amino acid composition.
• The crude protein, true protein, fat and ash contents increased significantly from 6.60%, 4.38%,
1.12% and 4.45% to 15.54%, 13.37%, 2.09% and 8.02% respectively when fermentation reached 96 h
in the presence of ammonium sulphate.
• High protein content with good amino acids profile (leucine, valine, lysine and threonine as essential
amino acids) was recorded in ammonium sulphate supplemented peels fermented for 96 h.
• Remarkable increase in protein and amino acids suggested that ammonium sulphate supplement
influenced the biomass protein yield and quality.

16. Sweet potato
• Rich in carbohydrates and minerals
• 90% of carbohydrate & 60-70% of starch
• Alcoholic beverages, ethanol, flour etc
• Mostly wastes are not utilized
• Vines, leaves are major wastes
• Uganda uses sweet potato to a maximum as food-
83%.
• China-53% as feed
• US-95% food;3.6%as feed

17. Bio ethanol formation from sweet potato

18. Biscuits from sweet potatoes!!!

19. Sugar beet

20. Lets conclude….An overview