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建立了一种从固体样品中提取PAM的方法,即先用蒸馏水三次提取样品中的PAM,并控制测试液中PAM的浓度为0.5~50 mg/L,然后用淀粉-碘化镉分光光度法测定PAM含量。试验测得,取自上海某污水处理厂的脱水污泥样品中PAM的含量在6.28 mg/g(干基)左右,污泥与回料(经多次回流堆肥试验得到的熟料)按体积比为1∶2混合后的堆肥物料中PAM含量为2.67 mg/g。在连续通风条件下,经过12 d高温好氧发酵,堆肥物料中PAM的含量降至1.38 mg/g,降解率为48.8%。可见,高温好氧发酵对降解脱水污泥中PAM具有良好的效果。
A method for extracting PAM from solid samples was established. Firstly, PAM was extracted three times with distilled water and the concentration of PAM in the test solution was controlled to 0.5 ~ 50 mg / L. Then, Determination of PAM content. According to the test, the content of PAM in the dewatered sludge sample from a sewage treatment plant in Shanghai is about 6.28 mg / g (dry basis). The sludge and the feed back (clinker obtained after multiple reflow composting tests) The PAM content of compost materials with a ratio of 1: 2 was 2.67 mg / g. Under the condition of continuous ventilation, after 12 days of high temperature aerobic fermentation, the content of PAM in the composting material dropped to 1.38 mg / g and the degradation rate was 48.8%. Visible, high temperature aerobic fermentation of dewatered sludge PAM has a good effect.