Rendering is a process that converts waste animal tissue into stable, value-added materials. Rendering can refer to any processing of animal byproducts into more useful materials, or more narrowly to the rendering of whole animal fatty tissue into purified fats like lard or tallow. Rendering can be carried out on an industrial, farm, or kitchen scale.The majority of tissue processed comes from slaughterhouses but also includes restaurant grease and butcher shop trimmings, expired meat from grocery stores, the carcasses of euthanized and dead animals from animal shelters, zoos and veterinarians. This material can include the fatty tissue, bones, and offal, as well as entire carcasses of animals condemned at slaughterhouses, and those that have died on farms (deadstock), in transit, etc. The most common animal sources are beef, pork, sheep, and poultry.The rendering process simultaneously dries the material and separates the fat from the bone and protein. A rendering process yields a fat commodity (yellow grease, choice white grease, bleachable fancy tallow, etc.) and a protein meal (meat & bone meal, poultry byproduct meal, etc.).Rendering plants often also handle other materials, such as slaughterhouse blood, feathers and hair, but do so using processes distinct from true rendering.

Converting algae oil into biodiesel uses the same process that turns vegetable oils into biodiesel. An algae farm could be located almost anywhere. It wouldn’t require converting cropland from food production to energy production. It could use sea water. And algae can gobble up pollutants from sewage and power plants.

This is a comment on the reality of food manufacturing today. As hard as they try, there will be times when an error just happens. The workers in the plants are human. Instead of depending on processed food, make your own.

Among other applications, the structured gel could be used as a fast and inexpensive chemical sensor, says Edwin Thomas, MIT's Morris Cohen Professor of Materials Science and Engineering. One place where such an environmental sensor could be useful is a food processing plant, where the sensor could indicate whether food that must remain dry...

"Agriculture is the process of producing food, feed, fiber and many other desired products by the cultivation of certain plants and the raising of domesticated animals (livestock)."

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