JWC offers a variety of meat processing equipment and assists in meat processing wastewater. Meat processing facilities produce wastewater with heavy loads of fats, oils, grease and solids. Before sending that water down the sewer drain, pre-treatment is required to remove as much of these solids as possible. Devising the most cost-effective treatment process is where facilities directors stand to make the most meaningful impact on their bottom line. The right combination of equipment, as in IPEC Internally Fed Rotary Drum Screens, Monster Industrial Grinders and training can greatly reduce wastewater expenses.
The preparation of meat products is a multi-stage process that produces wastewater in each respective step. In general, here’s where wastewater comes from in the meat production process:
Live animals stay in holding pens for less than one day prior to slaughter. Wastewater results from watering troughs, washdown, and urine from the animals. Rain run-off from uncovered pens can also contribute to the wastewater flow.
As animals are stunned, suspended and bled, blood can spill or splash outside the containment area entering the waste stream during clean-up operations. Hogs are dehaired as they pass through a scalding tank. This and carcass washwater enter the wastewater stream.
As albumin and fibrin are recovered from blood for various uses, the blood water is either evaporated or sent to wastewater.
Beef and hog paunches are washed and saved for edible products. Wash water goes to waste.
Washing and curing of hides contribute to wastewater with high levels of salts.
As carcasses are cut and trimmed, some material adheres to saw blades and conveyors. Equipment washdown sends these solids to wastewater.
As cuts are cured, deboned, and packaged for distribution, spills from cooking equipment and curing solutions are sent to wastewater.
Edible and inedible products are created as fats and water are separated from animal tissue. Spills from cooking equipment, collection tanks, and discharge from washdown contribute to wastewater.
As cattle are processed blood, meat, fat, paunch contents, bedding, manure, hair, dirt and other materials enter the waste stream. Waste prevention practices help reduce the volume and loading of process wastewater but high total suspended solids (TSS); fats, oils and grease (FOG); and biological oxygen demand (BOD) are always persistent issues in beef production. Of all waste products, blood has the highest polluting value with a BOD ranging between 150,000 – 200,000 mg/L. Paunch manure is the next largest polluter and can contribute greatly to TSS and BOD. Finally, animal tissue that is cleaned from processing areas and equipment makes up the rest of the TSS and FOG. Treating beef processing wastewater requires highly-durable process pumps that can withstand the gritty materials present in the fluids.
Pork processing is unique because of the scalding and hair removal phases that contribute high levels of fats, grease and solids to the wastewater stream. These processes produce unusually oily sludge that requires proper conditioning for effective dewatering.
JWC meat processing equipment grinders are used to reduce the volume of waste and minimize transportation costs to rendering plants. JWC’s 7-SHRED-2 grinders can be used in pet food production as a pre-breaker for frozen blocks. Finally, JWC grinders, such as the HYDRO In-line series, are used to protect pumps and other downstream equipment from troublesome solids.