Une manière plus pure de gérer le
fumier de porc
Pure Lean Incorporated est une compagnie qui a développé et breveté
un système de porcheries plus écologiques et un système de
récupération (compostage) du fumier de porc.
L'émission de télévision W5 faisait état récemment de tous les
aspects négatifs de l'industrie porcine, mais elle n'offrait aucune
solution et ajoutait que cela n'était pas possible ; en fait, cela est
très possible et nous sommes la preuve qu'une solution est disponible.
Ce système élimine l'impact environnemental du fumier porcin sur
l'eau souterraine et l'environnement immédiat (aucune odeur), ainsi que
l'élevage des animaux sans cruauté tout en transformant le fumier en un
compost et un engrais libre de pathogènes.
Le système Pure Lean est écologiquement soutenable, il protège la
santé humaine et l'eau potable, il instaure la confiance du public dans
l'industrie des productions animales et il offre une solution rentable à
(photo: Pure Lean)
to Manage Hog Waste
by Brent Townsend
Pure Lean Inc.
Lean Incorporated is a company which has developed and patented a
system of environmentally friendly hog barns and a hog manure
management (composting) system. Pure Lean consists of a group of
companies and is based in Medicine Hat, Alberta. The company was
founded in 1998 by Robert Notenbomer after successfully building a
prototype hog and composting system on his farm in Alberta, Canada .
In February 2000, the first operational barn was completed in Bow
Island, Alberta (5000 head facility), and the second was completed and
operational in Oyen, Alberta (10000 head) in June of 2001.
Pure Lean farm in Oyen,
(photo: Pure Lean)
Pure Lean is poised to maximize the use of its patented system to
eliminate critical and widespread environmental problems associated
with hog farming and other organic (including human) waste. Our
goal is to provide the technology for the integrated production of
pure antibiotic-free pork products and the composting of organic waste
products in a natural, environmentally friendly, safe manner. Our
objective is to become a fully integrated supplier of hog manure
composting systems and environmentally friendly barn systems.
pork production methods use small pens and slatted floors that allow
animal waste to drop from the pens into a holding tank below. In
some operations, large amounts of water (nearly 28 liters to each 4
liters of waste) are added to allow periodic flushing into a slurry
lagoon. These lagoons create a number of serious problems:
odour: as all
the waste decomposes in these slurry lagoons, it releases a number of
gases such as sulphur dioxide - the source of the stink associated
with hog barns.
greenhouse gases: the
practice of decomposing waste in water creates a number of greenhouse
gases, making slurry lagoons a significant contributor to global
ground water contamination:
holding the animal waste in slurry lagoons increases the risk of the
waste finding its way into the ground water. Many lagoons are merely
dugout holes in the ground, without proper linings or spill brumes.
inhumane animal treatment: the
pigs are crowded into restricted pens, resulting in a stressed
environment and increasing chances for disease, resulting in higher
use of antibiotics and higher mortalities.
Pure Lean provides an open
system with no pens,
offering a much larger living space for each hog
(photo: Pure Lean)
The problems associated with traditional hog operations have created
widespread opposition to the construction of new hog facilities and
existing operations. The state of North Carolina
and most recently the
have introduced moratoriums on hog expansion due to the severe
environmental impacts. The tragedy in Walkerton,
(triggered when animal waste infected with E-coli bacteria washed into
the town’s water supply), has further galvanized public opinion
against hog operations. As a result, countries throughout the
world have been responding to these environmental concerns by enacting
strict laws and regulations regarding any expansion in the hog
industry. There is no doubt that these restrictions will even be
more severe in the future.
A recent production on W5 focused on all the negative aspects of the
industry but offered no solutions and commented it can't be done, but
it can be done and we are proof that a solution is available.
Lean's environmentally friendly, low stress, antibiotic-free system
sets a new industry and market standard for premium pork products and
hog operations. The patented system eliminates the environmental
impact of hog waste on ground water and the surrounding environment
(no smell), enables humane animal husbandry, while at the same time
converting the waste to a highly marketable, pathogen-free compost and
fertilizer. Our unique system of waste management produces a
fertilizer (commercially sold as Hog Heaven) that outperforms
conventional chemical fertilizers and fungicides without any harm to
the environment. The Pure Lean composting system is also being
developed for handling of human waste, and contaminated soils, as well
as other agricultural and organic wastes.
(photo: Pure Lean)
Pure Lean's hog production differs from other conventional practices
in two ways.
The first difference is in the treatment of animals by
utilizing a completely redesigned hog barn. After ten years of
research and development, the barns now have a higher roof, providing
for improved air quality, and they provide an open system with no
pens, offering a much larger living space for each hog, allowing them
to behave naturally. The space allocation eliminates the tail biting
and fighting associated with traditional barns. Taking advantage of
the hogs’ natural inclination to soil only one area of the floor,
the floor is covered in wood shavings that provide the animals with
bedding, allowing them to root while absorbing the liquid waste and
enhancing the compost. One end of the floor is heated, using hot
water pipes running under the concrete floor, and the hogs then drop
in the cool end. Droppings are subsequently easily scrapped and mixed
with the wood shavings and transported to a sealed and controlled
composter on a daily basis. The in-channel composting vessel is
located in the barn but is separate from the living quarters of the
animals. The manure travels through the vessel until fully
decomposed, a process that takes 27 days (4 weeks). The end product is
100% pathogen-free compost. After this, the compost goes through a
cooling off period (curing) until it is ready to be bagged and sold to
retail and commercial distributors.
The second difference is in the medication programs utilized.
Medications are used to fight illness and disease which is created in
a stressful environment, such as the old barn system; however, it is
Pure Lean's goal to eliminate all medications in the finishing stages
Pure Lean system provides solutions to the problems related to organic
waste management while protecting the natural environment. This system
is good for the environment as it eliminates the majority of problems
related to traditional hog raising practices, namely the odour (no
lagoons), and water contamination. It also uses 80% less water than
traditional systems. This approach turns the liability of hog manure
into a value added product of compost organic fertilizers, encourages
humane animal husbandry, and provides a pure pork product (without
necessity of medications), while reducing the production of green
house gases. The Pure Lean system addresses the concerns of
health and environmentally conscious consumers. Our system is
environmentally sustainable, protects human health, protects drinking
water, builds public confidence in the livestock industry and offers a
viable cost effective solution to the livestock industry -- making the
world a better place to live.