The EPA and the Taoyuan City Government worked together to install anaerobic fermentation tanks and biogas collection equipment for power generation. The equipment collects manure from a total of 5,346 pigs located at Hongzhi livestock farm and Hexin livestock farm, and treats it to produce biogas for power generation. The facility where the equipment was installed is the first green energy facility that generates electricity using biogas in northern Taiwan and has been operating since 14 September 2020. It is expected to prevent 160 metric tons of animal waste per day from being discharged into local rivers, helping to improve the water environment and the living quality of the area.
The Currently 5,510,000 pigs and 152,000 heads of cattle are kept as livestock in Taiwan. Domestic livestock products play an important role in Taiwan’s food industry. However, releasing livestock waste into the environment can negatively impact river water quality. Therefore, to achieve both industrial development and environmental sustainability, the livestock industry needs to implement pollution management at source, and it can convert waste into valuable resources while doing so.
The EPA has been cooperating with the Council of Agriculture to promote power generation using biogas generated from livestock manure. In 2016, the EPA started pushing the recycling of livestock manure through converting the animal waste into farmland fertilizer. The waste-to-resource strategy has increased resource efficiency in rural areas, ameliorated river quality and odor problems near livestock farms, and reduced GHG emissions. By the end of August 2020, permits had been granted to 1,388 livestock farms to use animal manure as farmland fertilizer. These efforts have led to a total of 6,530,000 metric tons of manure being used as fertilizer annually, which amounts to 22.5% of the total volume of manure produced.
The livestock manure treatment facility in Hongzhi livestock farm turns the collected manure into biogas through an anaerobic fermentation process. The produced biogas can be used to generate electricity and sold to Taiwan Power Company. In addition, to further carry out circular economy measures, the farm also recycles the nitrogen nutrients contained in the manure by using the digestate sediment and fluid produced from fermenting the manure as organic fertilizers for farmland. Recycling livestock manure has also improved the water quality of Daku River, which is downstream of the farm. Due to these accomplishments, the farm has become an industry role model for livestock manure recycling and green energy generation.
Excerpt from Environmental Policy Monthly, 23 (10)
- Environmental Protection Administration, R.O.C.(Taiwan)