mestopslag

Mestopslag is the term used in several Nordic languages to describe facilities and practices for storing livestock manure and process waters from farms. It covers both liquid manure (slurry) and solid manure, and may include composting or aging areas. Proper mestopslag is a central element of nutrient management, odor control, and protection of soil, water, and air quality.

Facilities and design: Liquid manure storages include tanks or lagoons with impermeable bases and containment walls to prevent leakage. Solid manure storage may consist of uncovered or covered piles, sometimes with bedding, in structures or on impermeable surfaces with runoff collection. The required capacity depends on animal numbers, climate, manure characteristics, and the farm's spreading plan. Common design features are secondary containment, spill prevention, drainage and runoff capture, ventilation to reduce gas buildup, and covers or biogas systems to reduce odors and capture energy.

Environmental and health considerations: Inadequate storage can cause nitrate leaching to groundwater, phosphorus transfer to surface water, ammonia emissions, and odor complaints. Risks are mitigated by proper siting, impermeable floors, regular inspection and maintenance, proper cleaning of basins, and, where feasible, treatment like anaerobic digestion or solid–liquid separation.

Regulations and management: Local and national regulations often set minimum storage volumes, setback distances from water bodies and wells, liner requirements, and reporting. Best practices include planning with nutrient management plans, keeping records, maintaining equipment, and implementing spill response plans. See also manure management, nutrient management planning, and environmental regulations.