摘要
考察了不同温度下新型E-D厌氧反应器处理餐厨垃圾的效能,并从污泥的粒径分布、金属离子含量等角度分析了反应器内污泥理化特性的变化。结果表明,在进水COD为5 000 mg/L、HRT为24 h、温度为25-30℃时,E-D反应器对餐厨垃圾COD的平均去除率在90%以上。当温度降低到20℃后,COD去除率仅为77%左右,出水COD高达1 000 mg/L以上,且出水中乙酸、丙酸、丁酸、异丁酸、戊酸的含量分别达到了287.1,546.7,89.8,156.8,93.4 mg/L;颗粒污泥中钙、镁含量分别减少为21.84,5.14 mg/L;其表面积平均粒径、体积平均粒径减少为97.9,333.3μm。这表明温度为20℃,对颗粒污泥的稳定性造成了负面影响,产甲烷菌的活性受到抑制,导致效能降低。
Effects of temperature on performance of the E-D anaerobic reactor for treating food waste were studied. Meanwhile,the characteristics of granular sludge in the reactor at various operational temperatures were analyzed through particle size distribution（ PSD） and metal content in sludge. The results showed that when the E-D reactor was operated at 25 - 30 ℃,the mean COD removal rate was higher than 90%. When the temperature reduced to 20 ℃,the effluent COD concentration increased to 1000 mg / L and the COD removal efficiencies decreased to 77%. At the same time,the concentrations of acetic acid,propionic acid,isobutyric acid,butyric acid,and valeric acid in the effluent were 287. 1,546. 7,89. 8,156. 8,93. 4mg / L,respectively. The concentrations of Ca2 ＋and Mg2 ＋in granular sludge were 21. 84,5. 14 mg / L. The surface area average size and volume average size of granular sludge in the reactor was 97. 9,333. 3 μm. It was demonstrated that the stability of granular sludge were negatively affected and the activity of methanogens were inhibited at 20 ℃. Therefore,the efficiency of E-D reactor for treatment food waste was reduced.
出处
《环境工程》
CAS
CSCD
北大核心
2016年第6期146-149,共4页
Environmental Engineering
基金
广西高校科学技术研究项目(KY2015ZD018)
生态广西建设引导资金项目
关键词
E-D厌氧反应器
餐厨垃圾
温度
颗粒污泥
粒径分布
E-D anaerobic reactor
food waste
temperature
granular sludge
particle size distribution
