Characterization of Slaughterhouse
In slaughter house industry, water used in every process and about 16 m3 water used for 1 ton animal. It is often possible to make considerable reductions in polluting load by good housekkeping within the factory or by modifications to the process. In particular the separate recovery of blood and paunch contents can considerably reduce the BOD load.
Waste waters from killing and butchering operations usually contain a high proportion of coarse suspended matter, whilst those from processing operations contain less suspended matter but considerable quantities of fat. In modern killing
and processing plants the two streams are often kept separate for pretreatment.
Protein Recovery:It has been good practice to coagulate blood and render recovered fat and screening to produce saleable by-products. In recent years attention has been given to the precipitation of colloidal or dissolved material which can then be processed for use as fertilizer or a protein supplement for animal feeds. Simple chemical treatment using alumino-ferric followed by settlement can give BOD removals of the order of 60 percent but the sludge produced is bulky, difficult to dry, and its inorganic content makes it unsuitable for animal feeds. More recently lignin sulphonic acid at a pH of approximately 3 has been used in conjunction with dissolved air flotation , a recovery of 65 to 90 percent of the protein material as a sludge containing 5 to 15 percent of dry solids is claimed. Removal of BOD is of the same order as the protein recovery. Provided that a market can be found for recovered protein this process could be economically attractive as a pretreatment method. If the by-product is not for use in animal feedstuffs then it is possible that an alternative chemical could be used which would not require such a low pH, and so enable the plant to be constructed from less expensive materials.
Water Coming From Stockyard
In the stockyard water used for cooling the animals and washing the floor.
Characteristics:
BOI5=64 mg/lt
SS=173 mg/lt
Water Coming from Killing process
After killing process blood taken in a tank and first washing taken in the same tank. This output used for making chicken food.
Amount fo blood for different types of animal:
For 1 calf :13,6 kg
For 1 sheep :1,0 kg
For 1 pig :3,2 kg
Characteristics:
BOI5=825 mg/lt
SS=220-320 mg/lt
TS=1840 mg/lt
TKN=140 mg/lt
NH3=6 mg/lt
Water Coming From Blood and Tank Water
Characteristics:
BOI5=32000-44800 mg/lt
SS=3690 mg/lt
TS=44640 mg/lt
TKN=5605 mg/lt
NH3=205 mg/lt
Water Coming From Blood Tank Washing Water
Characteristics:
BOI5=1000-23000 mg/lt
SS=6000-165000 mg/lt
Water Coming From Rendering Process
In rendering process the output used as row material for some industries . For example oil used for produce soap. The waste water comes from rendering boiler and the condenser which get under control the odor problem.
Characteristics:
BOI5=2350 mg/lt
SS=1680 mg/lt
Oil=2180 mg/lt
Water Coming From Gut Washing Process
Gut washing can made wet or dry. In wet washing the output water have high concentration.
Characteristics:
BOI5=13200 mg/lt
SS=15120 mg/lt
TS=22600 mg/lt
TKN=686-1100 mg/lt
NH3=43 mg/lt
Oil=5220 mg/lt
Water Coming From Wet Cleaning of Digested Material
About 35 kg solid matter for 1 calf. In dry cleaning digested material used as animal food. If wet cleaning used 500 lt water used for 1 calf.
Characteristics:
SS=200-300 mg/lt
TS=3700-4300 mg/lt
Oil=1200-2000 mg/lt
Water Coming From Boiling of Tripe
In the boilling process about 50 lt water used for 1 calf.
Characteristics:
TS=9360 mg/lt
TKN=1100 mg/lt
Oil=5220 mg/lt
Water Coming From Meat Fragmentation
Characteristics:
BOI5=520 mg/lt
SS=610 mg/lt
TS=2860 mg/lt
TKN=36 mg/lt
NH3=2,5 mg/lt
Water Coming From Salt Process
The skin of the animals must be washed before salted. This water is the washing water of the skin.
Characteristics:
BOI5=2040 mg/lt
SS=1800 mg/lt
TS=26480 mg/lt
TKN=95 mg/lt
NH3=12 mg/lt
Waste Water Characterization at the End of Pipe
Characteristics:
COD=4000 mg/lt
BOD5=1330 mg/lt
SS=2000 mg/lt
Oil=600 mg/lt
TN=112 mg/lt
TP=38 mg/lt
