不同工艺沼气池产气效果比较研究

以福建省新星种猪育种有限公司和福建省永盛农牧科技发展有限公司的钢筋混凝土沼气池、太阳能加热玻璃钢沼气池和智能化上流式玻璃钢沼气池为研究对象，在进料污水相近，水力滞留期（HRT）同为10 d的条件下，比较分析了不同工艺沼气池一年中的发酵温度随气温变化情况、沼气池进出料COD变化情况以及产气效果。结果表明：①相同条件下，未加温玻璃钢沼气池比混凝土沼气池年平均温度高085℃以上，上流式玻璃钢沼气池、折流式玻璃钢沼气池和混凝土沼气池年平均容积产气率分别为074，044和035 m3·m-3·d-1；②太阳能加温玻璃钢沼气池年平均容积产气率为077 m3·m-3·d-1，高于未加温玻璃钢沼气池（044 m3·m-3·d-1）；③智能化玻璃钢沼气池年平均容积产气率为093 m3·m-3·d-1，高于太阳能加温玻璃钢沼气池。

Comparison on biogas production of different biogas digesters

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.