A feed mill is a key link in the livestock chain, often tied to poultry, livestock and aquaculture projects. It is an industrial activity subject to the Implementing Regulation for Environmental Permits, so it needs an environmental permit for the feed mill for construction and then operation, alongside the feed-specific requirements of the Ministry of Environment, Water and Agriculture. The main environmental issue in these mills is dust. This article explains the environmental path for a feed mill and its key conditions.
Environmental aspects of a feed mill
| Stage | Environmental impact |
|---|---|
| Receiving and unloading grain and raw materials | Dust during unloading and conveying |
| Grinding and mixing | Dust and noise from mills |
| Pelleting and drying | Steam, boiler or dryer emissions and odors |
| Storage in silos and warehouses | Spoiled materials, odors and pests |
| Bagging and loading | Dust and packaging waste |
The environmental path
- Environmental classification form: the National Center for Environmental Compliance (NCEC) sets the category based on the type and size of the activity (production capacity), energy used, location and surroundings, deciding within 10 working days.
- Category requirements: an environmental management plan and a rehabilitation plan for specified activities for Category 1, or an EIA study for Categories 2 and 3.
- Construction permit: before any construction work.
- Operating permit: before production starts, valid for three to six years.
- Ongoing obligations: permit conditions, self-monitoring reports, measurements, records and, for Categories 2 and 3, an environmental audit at renewal.
Dust: what the Air Quality Regulation requires
Article 7 of the Air Quality Regulation requires anyone transporting, loading or unloading materials to take precautions against dispersion, including covering airborne-prone materials or enclosing them, using vehicles equipped to prevent dust emissions, and stabilizing haul routes on site. In practice at a feed mill:
- Dust collection systems (filters or cyclones) at unloading, grinding, conveying and bagging points.
- Grain unloading in enclosed or covered areas.
- Regular, documented maintenance of dust collectors, since the regulation requires maintenance of pollution controls and prevention of any emission above the standards.
- Regular cleaning of truck routes on site.
Stacks and measurements
Boilers, dryers or dust-collector stacks are stationary sources. The regulation requires operators of stationary sources not under continuous monitoring to measure all stacks annually through a licensed provider, carry out initial measurements within 120 days of establishment or 40 days of reaching target production (whichever comes first), and keep records for at least five years.
Noise
Mills, fans and compressors are continuous noise sources. The Noise Regulation sets 70 dB by day and 65 at night at the boundary for industrial areas; a mill near inhabited farms or settlements is subject to lower limits according to the neighboring area's classification.
Spoiled materials and waste
Spoiled grain and raw materials, cleaning residues and packaging are managed under the Waste Management Law: sorting recyclables such as bags and cardboard, storing waste in designated places and handing it to licensed parties, with burning or burying on site prohibited.
Frequently Asked Questions about Feed Mills
Is the Ministry's feed license enough?
No. The Ministry's feed requirements are one thing and the NCEC environmental permit is another; the mill needs both.
What is the most important environmental condition for feed mills?
Controlling dust at unloading, grinding, conveying and bagging, and maintaining and documenting the dust collection systems.
Does the mill need emission measurements?
If it has stacks, boilers or dryers, those are stationary sources and the Air Quality Regulation requires annual stack measurements through a licensed provider, in addition to permit conditions.
Can the mill be built inside a poultry project?
Yes, but it must be described as part of the activity in the classification form, since size, energy and location determine the category, and adding it later is a change in size requiring a new permit.
How Abak Green helps
We review the mill's design and site, manage the classification form and environmental permit file, prepare the environmental management plan with dust, noise and waste measures, and coordinate stack measurements through licensed providers. Contact us about your feed mill.
