生物填料厌氧消化工艺与完全混合厌氧消化工艺处理剩余污泥的比较研究

Comparison of Anaerobic Filter Process with Traditional Complete Mixed Anaerobic Process Treating Excess Sludge

在中温条件下,研究生物填料厌氧消化处理工艺（包括未加搅拌和添加搅拌两种工艺）相对于传统厌氧消化工艺对处理污水处理厂剩余污泥的改善作用。结果表明：生物填料厌氧消化罐在6%,8%和10%进料浓度下,日均产气量提高29.87%~214.10%,沼气中甲烷含量提高4.67%~25.53%;系统正常运行下,生物填料厌氧消化工艺的出料沼液平均COD浓度低于传统工艺消化罐47.33%~65.88%;3种工艺处理条件下,沼液的p H值在6.99~7.70之间;碱度在1383~2989 mg·L-1之间,均在正常范围之内,但传统工艺消化罐的碱度变化幅度大于生物填料厌氧消化罐。由此得出结论,采用生物填料厌氧消化处理工艺,能增加污泥厌氧消化系统的稳定性及消化效率,有利于污泥的稳定化和能源化。

Under the condition of medium temperature,biological filler anaerobic process（ including stirring and non-stirring） were compared with traditional anaerobic process（ completely mixed anaerobic process）. The results showed that,under influent COD concentration of 6%,8% and 10%,the biological filler obtained higher average daily biogas production,29. 87% ~ 214. 10% higher than that of traditional process,and the methane content in biogas increased by 4. 67% ~25. 53%. The average COD concentration of effluent from the filter process was 47. 33% ~ 65. 88% lower compared with that from traditional process. The p H of biogas slurry was between 6. 99 and 7. 70 under all the three process. And alkalinity was 1383 ~ 2989 mg·L- 1,which were within the normal range. However,the change of alkalinity in the traditional process was bigger than that in the biological filler.