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污泥脱水是污泥处置的重要步骤,利用废物洁霉素药渣灰和聚丙烯酰胺(PAM)对污泥进行调理,根据污泥脱水性能的相关指标变化,探讨其对污泥脱水性能改善的效果及机理。研究结果表明,单独使用洁霉素药渣灰调理城市污泥,投加量为8 g/L时,污泥沉降比(SV)为51%,污泥比阻(SRF)减小28%;洁霉素药渣灰联合PAM使用时,比单独使用PAM的污泥可压缩性系数下降40.53%;污泥扫描电镜(SEM)图片表明,经过洁霉素药渣灰处理的污泥,污泥结构发生明显变化,能形成致密且具有相对较大孔径的絮体;污泥热重(TG-DTG)曲线显示,与原污泥相比,洁霉素药渣灰联合PAM调理污泥的脱水起始温度和热重峰明显前移,污泥脱水性能明显得到改善,在污泥最佳脱水条件下协同使用洁霉素药渣灰和PAM,8 kg洁霉素药渣灰相当于24 g PAM,但是二者的脱水机理不同。
Sludge dewatering is an important step in sludge disposal. Sludge is treated with waste linden ash and polyacrylamide (PAM), and the sludge dewatering performance is improved according to the change of sludge dewatering performance The effect and mechanism. The results showed that the sludge settling ratio (SV) was 51% and the specific sludge resistance (SRF) was reduced by 28% when the urban sludge was treated with lincomycin alone, and the dosage was 8 g / L. The results showed that the sludge compressibility coefficient decreased 40.53% compared with PAM alone. The results of scanning electron microscopy (SEM) showed that the sludge, sludge The structure of the flocculant obviously changed, which could form dense and relatively large pore flocs. The thermogravimetry (TG-DTG) curves of sludge showed that, compared with the original sludge, The initial temperature and the thermogravimetric peak were significantly advanced, and the sludge dewatering performance was obviously improved. In combination with zeaxanthin dregs and PAM under optimum dewatering conditions, 8 kg lincomycin dross corresponded to 24 g PAM, but the two different dehydration mechanism.