【摘要】 河道底泥的固化脱水是底泥疏浚过程中的关键步骤。【目的】文章主要探究了生物炭基絮凝剂投加量对河道底泥脱水性能的影响。【方法】通过污泥比阻、污泥压滤液水质检测等试验探究了三氯化铁、聚合氯化铝(PAC)、聚丙烯酰胺(PAM)和污泥基生物炭在不同配比组成下对底泥脱水效果的影响。【结果】最终确定污泥基生物炭具有较好的水质改善效果,且结合成本、脱水效率确定絮凝剂PAM:PAC:污泥基生物炭最佳投加比例为0.03%∶1%∶3%。【结论】在此基础上进一步进行实际项目应用,结果表明,投加上述生物炭基絮凝剂后河道底泥的脱水效果得到了明显改善。更多还原

【Abstract】 The solidification and dewatering of river sludge is a key step in process of sludge dredging. [Objective] This paper mainly studied the effect of the dosage of biochar based flocculants on the dewatering performance of river sludge. [Methods]Through experiments such as sludge specific resistance and tail water quality detection, the influence of Fe Cl₃, polymerised aluminum chloride, polyacrylamide, and sludge based biochar on the dewatering effect of sludge under different ratios was explored. Finally, it was determined that sludge based biochar has a good water quality improvement effect. [Results] Based on cost and dewatering efficiency, the optimal dosage ratio of flocculant PAM ∶ PAC ∶ sludge based biochar was determined to be 0. 03% ∶ 1% ∶ 3%.[Conclusion] On this basis, further practical project applications are carried out, and the result shows that the dewatering effect of river sludge is significantly improved after the addition of the aforementioned biochar based flocculant.更多还原