原位固化技术在高有机质底泥资源化利用中的试验

Experiment on In-Situ Solidification Technology for Resource Utilization of High Organic Sediment

文中以河道高有机质底泥为研究对象,探究原位固化技术在高有机质底泥资源化利用中的应用。研究了过氧化钙和微生物菌剂两种处理方法,以及10%、12%、14%这3种固化剂掺量比例原位固化的效果。结果表明,5%的过氧化钙、12%的固化剂掺量原位固化后能满足原位利用疏浚泥建设生态护岸的技术标准;0.1%的微生物菌剂好氧处理7d,12%的固化剂掺量原位固化后能满足原位利用疏浚泥建设生态护岸的技术标准。过氧化钙处理后底泥有机质从7.73%降至6.32%,微生物菌剂处理后底泥有机质从7.73%降至6.67%。过氧化钙是环境友好型氧化剂,能有效处理底泥,抑制底泥内源磷的释放,操作简便,耗时短。因此,在实际河道治理中,建议过氧化钙氧化和原位固化技术处理高有机质底泥,实现底泥的资源化利用。

Application of in-situ solidification technology in recycling river sediment which had high organic matter loading was studied in this paper.The effect of solidification agent with the mass ratio of 10%,12%and 14%were investigated with treatment of calcium peroxide and microbial agent.It was found that the in-situ treatment conformed to the technical standards for the construction of ecological revetment by simultaneously applying 0.1%microbial agent and 12%solidification agent for 7 days'treatment.A similar result was obtained by adding 5%calcium peroxide and 12%solidification agent.Sediment organic matter decreased from 7.73%to 6.32%after calcium peroxide treatment and from 7.73%to 6.67%after microbial agent treatment.Besides,calcium peroxide as an environmentally friendly oxidizer plays important roles in preventing the phosphorus release from the sediment and it was easy to operate and short in time.Therefore,In the actual river treatment,it is suggested that calcium peroxide oxidation and in-situ solidification technology can used to treat the sediment with high organic matter,so as to realize the resource utilization of the sediment.