文档介绍：华中科技大学
硕士学位论文
硅藻土处理城市生活垃圾渗滤液研究
姓名:石超
申请学位级别:硕士
专业:环境工程
指导教师:康建雄
20050507
摘要
垃圾填埋场产生的垃圾渗滤液污染物含量及高水质变化大同时还含有大
量有毒有害物质是一种高难处理的污水目前国内对渗滤液的处理尚无完善的
处理方案
本文进行了硅藻土对垃圾渗滤液的吸附实验及作用机理研究影响硅藻土在垃
圾渗滤液的吸附中的工艺参数主要为硅藻土用量溶液值吸附时间以及渗滤
液初始浓度值等
实验研究表明水力条件为时试验所用硅藻
土对城市生活垃圾渗滤液的最佳静态吸附参数为硅藻土用量合适值范围
停留时间
通过标准的测试手段进行了最佳工艺条件下硅藻土对污染物吸附的影响因素
吸附类型及吸附机理研究硅藻土对污染物的吸附主要有物理吸附和化学吸附其
中以物理吸附为主同时存在着深度效应和筛分作用
在本试验所确定的最佳吸附参数条件下渗滤液浊度去除率可达到
去除率为氨氮去除率为根据硅藻土对污染物的吸附特点认为
它用于渗滤液的预处理时间可以有效出除污水中的悬浮物质减小后续处理的负荷
同时增加渗滤液的可生化性能或者用于后续的深度处理使渗滤液达标排放

关键词硅藻土生活垃圾渗滤液吸附

I
Abstract
Landfill leachate, which yield from the processes of MSW municipal solid waste ,
is a kind of highly concentrated wastewater. Since the fluctuation of quality and quantity,
full of harmful pollutants, and great difficulty of treatment, there is still not a efficient
method for the processing of it.
In this dissertation, experiment and mechanism of essential diatomite as adsorbent for
the treatment of landfill leachate was studied. The main parameters, which affect the
absorbing process, including diatomite dosage, solution pH, adsorption time and initial
concentration of leachate, etc..
Experimental results showed the following regular patterns: under the hydrodynamics
condition of 250r/min(2min)+50r/min(1min), the best static adsorption parameters are as
following: diatomite dosage was 5g/L, the benefiting pH value was 6~8 and retention
period was 20min.
By relying on the standard test methods, under the optimum technical parameters, the
absorbing type, mechanism and factors which affect the process of adsorption were
studied. The adsorb mechanism include physical and chemical adsorption, the former is
the main adsorption, and include depth filtration and molecular sieving properties as well.
Experimental results showed that, under the best parameters, the adsorb ratios of
turbidity, COD, ammonia-nitrogen are 98%, % and %. From the cha