Groundwater Pollution by Nitrate Nitrogen and Livestock Waste Management

The rapid growth in livestock farming since the late 1960s has resulted problems managing excess waste excreted from livestock. A study on water quality of groundwater, river water, and soil solution clarified that groundwater pollution by nitrate nitrogen was caused nitrogenous compounds permeating wastes under inappropriate management, including dumping and/or digging in. appropriate treatment as compost liquid fertilizer improved pollution. full-scale enforcement “The Law Concerning Appropriate Treatment Promotion Utilization Livestock Manure” 2004 reduced management practices such In 2019, all farms installed comprehensive facilities for composting, wastewater treatment, other measures. However some issues remain to be resolved relating operation existence aged over 20 years, which may cause problems. addition, elution place use requires care even now. 2021, an investigation report published Ministry Agriculture, Forestry Fisheries. Most solid matter is converted into compost, can widely distributed croplands agricultural farms. Broiler litter used combustion energy. Liquid dairy cattle applied croplands. Wastewater pig purified with activated sludge process obtain clear complies effluent standards then discharged rivers public waters. An application rate recommended promote recycling organic resources control groundwater.