Waste water treatment in slaughter houses or meat processing industries.

2. TREATMENT OFTREATMENT OF
ABATTOIRABATTOIR EFFLUENTEFFLUENT
Presented By:Presented By: Dr. Irshad ADr. Irshad A

3. IntroductionIntroduction
1
Characteristics of effluentCharacteristics of effluent
2
Effluent treatments methodsEffluent treatments methods
3
ConclusionsConclusions
4
OverviewOverview

4. IntroductionIntroduction
What is “Effluent”..?What is “Effluent”..?
Effluent is an out flowing of water or gas from a natural
body of water, or from a human-made structure
The meat industry uses large quantities of waterThe meat industry uses large quantities of water
454 L/PIG454 L/PIG 272272
L/CATTLEL/CATTLE
45 L/ S & G45 L/ S & G
10 Litre10 Litre
per Kgper Kg
MeatMeat

5. Source of effluents in meat processing plantsSource of effluents in meat processing plants

6. EFFLUENT =EFFLUENT = Potent pollutant source
High organic matter
Bad odour
Pathogenic bacteria
Should not release directly to environmentShould not release directly to environment
without treatmentwithout treatment
Objective of effluent treatmentObjective of effluent treatment
Safely discharged into water or sewer
Eliminate threat of diseases
Convert into a readily reusable resource
Clean environment

7. 1. BiodegradableBiodegradable
organic matterorganic matter
4. High
Temperature &
Turbid
3. Aerobic andAerobic and
Anaerobic bacteriaAnaerobic bacteria
2. Grease, fat and
oil (FOG)
Characteristics ofCharacteristics of
effluenteffluent
BOD
COD
N2 Content
Clog theClog the
systemsystem
PathogenicPathogenic

8. Source BOD mg/litre
Poultry meat plant 1000-12001000-1200
Pig meat plant 1500-20001500-2000
Cattle/sheep meat plantCattle/sheep meat plant 1400-32001400-3200
Fish processing 1000-30001000-3000
Dairy (washings) 600-1300600-1300
Biochemical oxygen demand (BOD)
Normal Domestic sewage 250-300 mg/litreNormal Domestic sewage 250-300 mg/litre

9. Primary treatmentPrimary treatment SecondarySecondary treatmenttreatment Final treatmentFinal treatment
Physical removalPhysical removal
of solid-of solid- Like Fat,Like Fat,
Grease, TissueGrease, Tissue
pieces, etc…pieces, etc…
BiologicalBiological
treatmenttreatment - ByBy
using aerobic andusing aerobic and
anaerobic bacteriaanaerobic bacteria
DisinfectionDisinfection – FreeFree
from microorganismfrom microorganism
-ready to release/-ready to release/
further reusefurther reuse
Effluent Treatment StepsEffluent Treatment Steps

10. Removal of solids by passing through screen, filters,
floatation/sedimentation, grit chamber etc.
Primary treatmentPrimary treatmentStep 1Step 1
FAT TRAP
200-250 mg/lit.200-250 mg/lit.
GRIT CHAMBER WIRE SCREENS

11. Primary treatmentPrimary treatmentStep 2Step 2
Air floatation/Dissolved Air Floatation (DAF)
Physical separation by micro-bubbles of solids, fat, grease.

12. Secondary treatmentSecondary treatment
Biological treatment system under controlled condition
90% OrganicOrganic
mattermatter reductionreduction
Bacterial CellOrganic matter
Bacterial culture
SedimentationClean EffluentClean Effluent

13. Anaerobic Treatment-Anaerobic Treatment- absence of air
TWO-STAGE FERMENTATION PROCESS
Secondary treatmentSecondary treatmentStep 1Step 1
CarbohydratesCarbohydrates
FatsFats
ProteinsProteins
SugarsSugars
Fatty AcidsFatty Acids
Amino acidsAmino acids
Carbonic AcidsCarbonic Acids
and Alcoholsand Alcohols
Hydrogen, COHydrogen, CO22
AmmoniaAmmonia
Hydrolysis Acidogenesis
Hydrogen,
Acetic acid and
CO2
Methane
CO2
Methanogenesis
Biogas
(50-75(50-75%%
Methane)Methane)

14. Effluent mixing with sludge
containing bacteria and aeration by
aerators
1. Activated sludge process
Effluent is applied to the surface of
the stone bed and trickles
downwards through the media, to
which microorganisms are attached
2. Trickling filters
Scientifically constructed pond (3-5ft
deep) where Sunlight, bacteria, algae
& oxygen interact
3. Lagoons
Aerobic treatment- Organic carbon converted into CO2,
nitrogen or nitrate ions
Secondary treatmentSecondary treatmentStep 2Step 2

15. Final treatmentFinal treatment
Fertilizer &
soil conditioner
COMPOSTING
Incineration & landfill
Drying + Landfill
Or
Disinfected by
chlorine
Discharged

16. Microfiltration
Reverse
Osmosis
Ultrafiltration
Electrocoagulation
Novel methods of effluent treatment
11
22 33
44

17. Conclusions….Conclusions….
Slaughterhouse wastewater contains various and high amounts of
organic matter (e.g., proteins, blood, fat and lard)
Treating of slaughterhouse wastewater is very important for
prevention of environmental contamination
The most common methods used for treating slaughterhouse
wastewaters are fine screening, sedimentation, coagulation–
flocculation, trickling filters and activated sludge processes.
After final treatment disinfected effluent dispersed back into the
environment.

19. For a greenerFor a greener
EnvironmentEnvironment