Abstract: The traditional biogas digester， biogas digester of glass fiber reinforced plastic（GFRP） using solar energy heating system and intelligent biogas digester in Xin\|xing pig farm and Yong\|sheng pig farm in Fujian Province were compared for biogas production. The index of feed of the three different technology biogas digesters was close and HRT was 10 d. The fermentation temperature changed with climate temperature， COD levels at the entrance and exit of biogas digesters and biogas production rate of biogas digesters were compared and analyzed in one year. The result showed that， firstly in the same conditions， the fermentation temperature of GFRP biogas digester was 085℃ higher than that of traditional biogas digester， the biogas production rate of up\|flow GFRP biogas digester， baffling GFRP biogas digester and traditional biogas digester was 074， 044 and 035 m3·m-3·d-1 respectively. Secondly， the biogas production rate of GFRP biogas digester using solar energy heating system was 074 m3·m-3·d-1， which was higher than that of GFRP biogas digester without solar energy heating system. Thirdly， the biogas production rate of intelligent biogas digester was 093 m3·m-3·d-1， which was higher than that of GFRP biogas digester using solar energy heating system.

Key words: biogas digester, biogas production rate, glass fiber reinforced plastic, solar energy heating system