Resource Efficiency
Norson’s energy use is dominated by use of electricity in its farms, abattoir, feed mill and processing plants. The single greatest users of electricity in the farms are infra-red bulbs used to provide heating for very young piglets, while LPG is used for seasonal heating. The greatest electricity use in processing is for process refrigeration and cold storage and room cooling. The process plants and feed mill use gas for water heating and steam raising substantially for pelletizing respectively.
Energy and water use at Norson is included within Smithfield’s corporate targets which aimed for 10% reduction in specific consumption of energy and water between 2008 and 2014. Norson has used consultants to undertake several energy efficiency reviews of its operation over the years, and the most recent work done in 2016 suggests opportunities to make efficiencies in use of refrigeration, with longer payback options related to co-generation of heat and power, digestion of processing plant waste and solar (especially for farms) all technically feasible. Norson is currently assessing and prioritizing the consultant’s recommendations and will implement those that meet business objectives. Benchmarking energy use is not readily feasible due to the divergence of processing activities (slaughter, cutting, value-added processing, blast freezing and cold storage) at the single site.
Water
Norson has implemented the most obvious water efficiency measures, but specific consumption remains over benchmark. To the extent cost-effective, Norson shall install additional submeters to enhance its understanding and control of water use.
Liquid Effluent Management
At most farms, pig excreta are collected and transported by water circulation systems to large effluent lagoons. The lagoons are made by excavation and compacting of earth, in compliance with local regulations, and historically were not lined. Norson has measured soil infiltration from these lagoons and detected little loss to the ground, and the lagoons are not considered to present any threat to ground water which is several hundred meters deep. Nevertheless, Norson embarked upon a program to line all lagoons at all farms as the major component of its master environmental plan. Work has already started and is scheduled for completion in 2016. Several farms use straw bedding for the pigs. At the end of the cycle, the used bedding is composted. This type of farm does not generate liquid effluents.
Lagoon levels are managed at a level of not less than 18 inches below the sides. The lagoon walls are raised above the surrounding land which means that storm water collecting on such land will not flow into the lagoons. There is no effluent discharge from the farms, water loss is by evaporation from the lagoons which matches water use in all cases. Norson no longer recirculates water from lagoons to the pig houses, since it considers that this practice increases the risk to bring infection from uncontrolled lagoons into the biosecure animal houses.
Liquid effluents from Plant 3, which meet local regulation are discharged to the municipal sewer. Combined liquid effluents from Plant 1 (slaughter) and Plant 2 (value added processing) are pre-treated by sieve, homogenization and dissolved air flotation, before liquid effluents are discharged to the municipal sewer for further treatment. Liquid effluents do not meet normal city acceptance criteria, but the company does have a permit to discharge these effluents. Further treatment by digestion then beneficial use of biogas will be further reviewed by Norson.
Air Emissions
Plant 1 has two steam boilers and two direct-contact process water heaters, while the feedmill has one steam boiler. All are natural-gas fired, and energy use data shows that all are below the 3 MWth heat input threshold of monitoring as indicated by the World Bank Group General EHS Guidelines. IFC observed no significant odor at the processing plant.
GHG Emissions
The annual GHG emissions from Norson’s expanded operations on completion of the project are estimated to be around 60,000 tonnes per annum CO2 equivalent. This figure accounts for energy-based emissions in the feedmills, farms and processing, transport energy and emissions from livestock.
Solid Waste Management
Each farm has a composting area for dead animals some way from the main farm operations. These are pits: carcasses are bisected, placed in the pit and limed, then covered temporarily with straw. When the pit is full it is filled with earth and the process repeated. The composting areas is fenced to prevent access by scavenging wild animals.
At the processing plant, slaughterhouse pen wastes are firstly sieved, collected in a tank then are sent to the landfill. Inedible offal, blood, rejected meat and carcasses are collected in tanks and sent daily to a licensed rendering plant. Sludge from the wastewater pre-treatment plant is collected and sent to an authorized landfill.
Both the feed mill and value added processing plant have well established waste minimization programs to minimize waste generation and maximize recycling potential. Used cardboard boxes, metallic wastes, damaged wood pallets are recycled with licensed providers. Hazardous materials such as used lights and maintenance wastes are disposed of by a licensed contractor in an authorized hazardous material landfill. All waste carriers provide receipts, enabling Norson to track carriage of its waste from its sites to the authorized disposal points.
Pesticides
Norson contracts with a licensed pest-management company for control of insects and rodents at the farms. A list of pesticides employed has been reviewed: all are commonly used Class II or Class III substances.