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调理剂种类和配比对污泥生物干化效果的影响
doi: 10.13205/j.hjgc.201501012
EFFECT OF DRY-WET RATIO ON REMOVAL EFFICIENCY OF SANDY SOIL SUBSURFACE INFILTRATION SYSTEM
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摘要: 为研究污泥生物干化过程中的调理剂种类及配比等工艺参数对生物干化效果的影响,利用自主设计的生物干化反应器进行了实验室模拟,分别研究了麦秆和锯末作调理剂和3种不同调理剂配比(污泥与调理剂湿基质量比为3∶1,5∶1,8∶1)的生物干化效果。结果表明,利用麦秆作调理剂能够达到更高温度,含水率降低了10.88%,优于锯末作调理剂降低的5.9%;与其他配比相比,污泥与调理剂添加比为5∶1时,干化效果与经济性相对更好。利用麦秆作调理剂,且物料配比为5∶1(污泥∶麦秆)时,生物干化效果最佳。Abstract: Through soil infiltration filter system，the effects of difference dry-wet ratio on the removal efficiency of subsurface infiltration system ( SIS) were discussed． At the hydraulic loading of 0. 08 m3 / ( m2 d) ，five kinds of operating conditions were set up，dividing the continuous operation and four dry-wet ratio conditions ( 1 ∶ 2，1 ∶ 1，2 ∶ 1 and 3 ∶ 1) ． The results showed that intermittent running was a positive method to enhance the removal efficiency of SIS． The dry-wet ratio of 1∶ 1 had the best removal efficiency that COD，ammonia nitrogen，TN and TP removal rates reached 90%，95%，70% and 90% respectively． Dry-wet ratio of 1∶ 1 in SIS was suggested when used in the north area predominantly sandy soil．
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Key words:
- subsurface infiltration system /
- dry-wet ratio /
- sandy soil
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