1.In this project, two schemes of biogas center will be designed. One is united biogas center with treatment capacity of 100 CMD so it is called micro-biogas center. The other is large-scale livestock farm type to collect livestock wastewater from small farms and then be treated together. Lixin (立新) stock farm will be selected as the site for constructing the large biogas center to collect swine manure and urine from its nearby small farms, including Jinning (金寧) and Fengli (豐立), which treatment capacity will be around 100 CMD. 2.The reuse promotion of fertilizer will be done via three channels including video, brochure and a biogas residue ＆ slurry reuse information platform. As for the issues regarding water saving and the elimination of biogas residue, according to feasibility investigation, they could be made good reuse as valuable materials and fertilizers. However, currently, it is lack of willingness to use in the market; thus, water reuse is adopted in priority. Finally, according to different condition, the performance of construction ＆ river pollution improvement will be evaluated regularly. If the biogas residue could not be as valuable material in this project, the project won’t have its feasibility. 3.Considering that micro-biogas center should be built for long-term use and operated, overseas cases and experiences should be implanted. To solve the problem in swine manure and urine pollution efficiently, it needs to add agricultural material to have co-digestion and be processed in large-scale so that they could be as raw material for anaerobic digestion. This method should be supported by related complementary measures, including a stable raw material provide and contract signing with animal husbandries. 4.The biogas center in large livestock farm style will be built on agricultural land and will be designed with wastewater treatment facility to improve the problem of wastewater pollution. Thus, the project should stand by farmers’ side meanwhile. In view of the today’s low compensation policy, limitation, high risk, the current Animal Industry Act and the amendment of the regulation on the elimination of biogas residue ＆ slurry, most farmers would remain hesitant and only put self-owned wastewater treatment improvement as their goal. Therefore, only when the condition of co-digestion and the biogas waste treatment clear will attract people to join. If exclude the green energy concept of biogas center in the project, in the phase, it could adopt traditional anaerobic wastewater treatment. Though the latter requires a lot of land, it could optimize and use the existing facilities and use biogas power as its adding value for the short-term treatment at the present stage.

Anaerobic Digestion Tank, Power generation System, Digestate Dreg, Digestate Liquid, Organic fertilizer