Chemical engineers build and operate
plants and processes which produce desirable chemical products.
We coexist with countless things to which chemical engineers have
made their contribution. The plastic in the keys on your computer
keyboard, the paint on your walls, the food you eat, the car you
drive, the fuel in its tank, and the electricity available at your
wall outlet are but a few. Yes, there are chemical engineers that
clean up messes left by some of these processes to make or keep the
air we breath and the water we drink clean.
We follow a general methodology to to
arrive at processes that can be operated to keep operators and
neighbors safe. In fact, its really nice when these processes
function without the neighbors ever becoming aware of the plants
existence, having any health effects associated with the process, or
having Erin Brockovich knock at their door. That means you never
smell the existence of a pulp and paper mill or find out that your
house was built on ground contaminated my some hazardous chemical
operation.
One step in this process analyzes the
safety of the operation. Various techniques are used, but its
purpose is to place systems and limits in place which insure that
limiting accident scenarios never happen. As an example, the recent
difficulties at the Japanese nuclear reactors had a safety analysis.
It was pointed out over twenty years ago, that there were
deficiencies in their design because a tsunami beyond design
parameters could credibly occur. It did, and the world found out
about it.
I followed this process when
considering beginning a cattle operation. The hazards inherent to a
cattle operation are mostly toward the workers. Cattle and horses
can rearrange their feet much faster than we can react. That's what
makes rodeo exciting. The process of producing beef requires that
man and animal come into close contact, and hopefully this can occur
without things turning “western” every time. Bucking horses and
bulls and running calves should be the exception and not the rule. I
personally don't need that excitement.
Cattle and horses require vaccinations
against diseases which are part of their everyday life. Numerous
products and systems exist to insure that this can happen safely for
both cow and cowboy. Since vaccinations must be given repeatedly
throughout a cows life, it should be a design criteria that each cow
can pass smoothly and comfortably through the system every time. It
never works out well when the cowboy or veterinarian triggers the
self defense instincts of cow or horse. Just like people, some cows
activate their defenses a little faster than others, so you need
equipment in-place that insures the safety of man and animal when
(not if) it happens. This is design criteria number 1. It is a
must.
The system is not constrained to only
when man and cow are in close proximity. You have to be able to get
a bunch of cows from pasture to a place where they can be vaccinated,
preg checked, branded or doctored. Here is an example of a livestock
working system: http://www.wwmanufacturing.com/ez.html
While the working system provides a barrier, it still requires
procedures to use all the facets safely, as well as getting the
cattle safely into the squeeze chute one at a time with minimal
stress to worker and cow.
Temple Grandin, a professor at Colorado
State University, has influenced the design of such systems from the
cow's point of view. She found that working systems can be barriers
instead of facilitators to working cattle in a safe, effective
manner. The result has been new systems which greatly improve moving
cattle through, as well as, simple retrofits to existing systems.
We have worked cows for over ten years
in the above system. We have suffered no injuries requiring medical
attention nor have we lost any work time from its use. The cattle are
used to it, and two of us can easily work 100 cattle a day in it.
No comments:
Post a Comment