不同因素对冻融-离心脱水处理河流底泥的影响研究  

Study on the Influence of Different Factors on River Sediment Treated by Freeze-Thaw and Centrifugal Dehydration

作　　者：王杰[1] 刘静姝 许海萍 梁露巍 徐筱暄 WANG Jie;LIU Jing-shu;XU Hai-ping;LIANG Lu-wei;XU Xiao-xuan(School of Environment,Liaoning University,Shenyang 110036,China;Dashiqiao Ecological Environment Bureau,Yingkou 115100,China)

机构地区：[1]辽宁大学环境学院,辽宁沈阳110036 [2]大石桥市生态环境分局,辽宁营口115100

出　　处：《辽宁大学学报（自然科学版）》2024年第2期141-146,共6页Journal of Liaoning University：Natural Sciences Edition

基　　金：辽宁大学2022年大学生创新创业训练计划项目(X202310140028)。

摘　　要：河流底泥是河流的沉积物,有含水率高的特点.底泥的高含水率是限制其得到有效处理的重要因素.为此,本研究以沈阳市新开河怒江桥段的河流底泥为研究对象,分析了冷冻时间、底泥初始质量、离心时间和离心速度等对河流底泥脱水率和底泥上清液浊度的影响.结果表明,随冷冻时间、离心时间和离心速度的增加,底泥脱水率先提高而后保持平稳,底泥上清液浊度先降低再保持平稳;底泥初始质量与底泥脱水率呈反相关,与底泥上清液浊度呈正相关.试验得出最佳处理条件:冷冻时间5 h、底泥初始质量60 g、离心时间20 min、离心速度6000 r/min.在此条件下,底泥脱水率由34.00%提高至61.09%,底泥上清液浊度由181.2 NTU降低为14.4 NTU.River sediment is the sediment of the river,which has the characteristics of high water content,and the high water content is an important factor affecting the effective treatment of river sediment.This study took the sediment of Nujiang bridge section of Xinkai River in Shenyang City as the research object,and analyzed the influences of different factors(freezing time,initial mass of sediment,centrifugal time and centrifugal speed)on the dewatering rate of river sediment and the turbidity of supernatant.The results show that with the increase of freezing time,centrifugal time and centrifugal speed,the dewatering rate of sediment first increases and then remains flat,while the turbidity of supernatant decreases and then remains flat.The initial mass was inversely correlated with the dewatering rate and positively correlated with the turbidity of supernatant.The optimum conditions were obtained:freezing time 5 h,initial mass 60 g,centrifugal time 20 min,centrifugation speed 6000 r/min.Under these conditions,the dewatering rate of sediment increases from 34.00%to 61.09%,and the turbidity of supernatant decreases from 181.2 NTU to 14.4 NTU.

关 键 词：河流底泥 脱水 冻融 离心 

分 类 号：X705[环境科学与工程—环境工程]