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Number of Approved
Resources Livestock Farms
3,045 Farms
Area of
Irrigated farmlands
3,912 Hectare
Irrigation amount of
liquor and fiber digestate
1039.4 million metric tons
Save pay money on water
pollution control fee
70.05 million NT dollars
Save chemical
51.22 million packs
113,690 T / year
Capacity of biogas
power plants
7,190 watt

About Resources

Illustration of Husbandry Excrement Resources


Biogas generate electricity

Anaerobic fermentation of livestock excrements generates biogas, of which more than 60% is methane, a greenhouse gas. According to the IPCC 2007 report, the potential of methane to cause greenhouse effect and global warming is 25 times than that of carbon dioxide.

Therefore, collecting and utilizing biogas not only reduce greenhouse gas emissions but can also serve as a more stable source of bioenergy. After different levels of purification and recovery, biogas can be used for electricity generation, heating, and vehicle fuel.

Fertilizer For Farmland

Liquor and fiber digestate

Livestock excrements, after anaerobic digestion, would generate a water-soluble substance called "liquor digestate," and solid by-product called "fiber digestate." Both liquor and fiber digestate contain abundant nutrients and fertilizers that can be absorbed by crops and increase their yield.

Furthermore, research shows that the nitrogen fertilizer obtained from raising pigs in a year is equivalent to one bag of fertilizer #5 of Taiwan Fertilizer Company. Farmers can use liquor and fiber digestate to reduce the use of chemical fertilizers, promote organic farming, and save a significant amount of expense on fertilizer.

The Recycling And Reuse Of Animal Excreta From Livestock Farming

The recycling and reuse of animal excreta from livestock farming

Based on the Agriculture Industrial Waste Reuse Management Regulations, the Council of Agriculture, Executive Yuan, encouraged livestock farmers to collect livestock excrements in barrels or tank trucks and transport them outside the farmland for further processing, and the wastewater was used to restore farmlands after treatment. From 2009 to 2010, a pilot project was conducted to transport pig wastewater for irrigation, and the report indicated no negative impact on soil, groundwater, or public health. Therefore, proposals to reuse agricultural waste could now be accepted so to attain to advantages such as saving irrigation water, supplementing nitrogen fertilizer, and reducing carbon emissions.

Discharge For Irrigation In Plantation

Discharge for irrigation in plantation

Due to the scarcity of global water resources, recovery of wastewater has become a worldwide trend. Taiwan, constrained by its geographical environment and climate, is ranked as the 18th among countries with water scarcity in the world.

The livestock farming industry is often located in rural areas and developed alongside agriculture and fisheries. Given that the livestock excrement is naturally high in organic and nitrogenous substances, if it meets the effluent standards after treatment, it could provide the water and nutrients needed for crops, and reduce groundwater extraction and the demand for agricultural irrigation and drainage. This creates a multi-win situation for the livestock industry, farmers, and the water environment.

Business Profile

  The livestock excrement is naturally rich in organic and nitrogenous substances. Even after being processed by a three-step treatment system, it is still rich with organic matters and nutrients such as nitrogen, phosphorus, and potassium that could be used by plants. Employing these instrumental resources to irrigate the farmland not only avoids river water pollution but also solves the problem of misplaced resources.

the ratio and timeframe of recycling treatment of livestock excrements for livestock industry
“Soil treatment standards” Modify regulations applicable to livestock industry in 1999. “The recycling and reuse of animal excreta from livestock farming management regulations “ provide a scope to agriculture industrial waste reuse management regulations in 2002. Officially stipulate the use of liquor and fiber digestate as fertilizer for farm lands in “Water pollution control measures and test reporting management regulations“ in Nov. 2015. “Water pollution control measures and test reporting management regulations” expand applicability of the practice, streamline test items and increase flexibility in management in Oct. 2016. “Water pollution prevention and control fees charging regulations” Levy a water pollution tax on the livestock industry in Jan. 2017.“Water pollution control measures and test reporting management regulations” explicitly set forth the ratio and timeframe of recycling treatment of livestock excrements for livestock industry in Dec. 2017.“Water pollution control measures and test reporting management regulations” streamline the application procedure and monitor frequency for small-scale livestock farmers and manage farmers of different scales separately in Mar. 2019.

  According to Article 46-1 of the Water Pollution Control Measures and Test Reporting Management Regulations, pig farms with 20 or more heads of pigs and cattle farms with 40 or more heads of cattle are required to achieve a recycling rate of 5% and 10%, respectively, within the regulatory timeframe.

regulation for  the ratio of  hsbandry excrement resources
The EPA amended the regulations in October 2016 to simplify the inspection items and application procedures. To strongly promote livestock excrement utilization, the regulations were amended on December 27th, 2017, to simplify the application procedures of adding farmlands for fertilizers, exempt permit registration for using fertilizers in farmlands, and simplify content required to report recycling. At the same time, the following standards are set to indicate the required percentage of transforming livestock wastewater (through using liquor and fiber digestate as farmland fertilizers, re-using livestock excrement based on Regulations on Agricultural Waste Reuse, irrigating vegetables if the liquid meets effluent standards) into resources. For newly installed facilities, the percentage of wastewater utilization shall account for more than 10% of the total. For existing facility that raises more than 2,000 pigs or 500 cattle, the target is 5% within 5 years and 10% within 10 years; while those that raise 20 to 2,000 pigs or 40 to 500 cattle should reach 5% within 8 years and 10% within 12 years. The regulations were once again amended on March 8th, 2019 to extend the definition of fertilized farmland, and impose tiered management on excrement recycling based on the fertilization amount and type.
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