不同载体固定活性污泥原位修复轻度淤积底泥的效能
Effectiveness of Fixed Activated Sludge with Different Carriers to In-situ Remediate Mildly Silted Sediment
李涛 1刘晔 2陈纪朝 2龚逸 1刘才生 1王宗平 2谢鹏超2
作者信息
- 1. 武汉新区建设开发投资有限公司,湖北武汉 430050
- 2. 华中科技大学环境科学与工程学院,湖北武汉 430074
- 折叠
摘要
底泥修复是黑臭水体治理中的重要环节,原位修复操作简便且对河道的破坏小.利用固定化菌剂原位修复实验装置,探究了活性炭、沸石、陶粒3种载体固定活性污泥修复轻度淤积底泥的效能.载体物理特性及载体对微生物的吸附特性实验结果表明,活性炭相对于沸石和陶粒具有更丰富的孔隙结构和更强的活性污泥吸附能力,沸石的吸附能力强于陶粒.不同载体固定活性污泥原位修复轻度淤积底泥实验结果表明,3种载体固定活性污泥均能有效降低底泥中有机质含量,其中活性炭固定活性污泥对底泥中有机质的降解效果最佳,60 d内有机质含量可降低45.2％;3种载体固定活性污泥均能促进底泥中重金属离子转移,其中沸石固定活性污泥对重金属离子的去除效果最佳,60 d内对铜离子、铬离子、铅离子的去除率分别达到了 28.8％、27.2％、37.2％;此外,3种载体固定活性污泥均能有效去除上覆水中的CODCr、NH3-N、TN、TP,60 d内CODCr去除率基本超过50％,NH3-N、TN、TP去除率基本超过80％.综合底泥和上覆水处理效果可知,活性炭固定活性污泥的表现最优,其次为沸石固定活性污泥.
Abstract
Sediment remediation is crucial in the management of black smelly water bodies,and in-situ remediation is easy to operate with little damage to the river channel.Through an in-situ remediation experimental devices with fixed bacterial agents,the efficacy of fixed activated sludge with three carriers of activated carbon,zeolite,and cer-amsite to remediate mildly silted sediments was explored.The experimental results of the physical properties and the adsorption characteristics of the carrier to microorganisms show that activated carbon has a richer pore structure and stronger activated sludge adsorption capacity than zeolite and ceramsite,the adsorption capacity of zeolite is stronger than that of ceramsite.Experimental results show that all the three carriers fixed activated sludge can effectively re-duce the content of organic matter in the sediment,the activated carbon one has the greatest effect which can reduce the organic matter content by 45.2％within 60 days;All three types of activated sludge can promote the transfer of heavy metal ions in the sediment,and the zeolite one has the best removal effect with the remove rates of copper ions,chromium ions,and lead ions respectively by 28.8％,27.2％,37.2％within 60 days;In addition,the three sludge can effectively remove CODCr、NH3-N、TN and TP in the overlying water of the sediment.Within 60 days,the removal rate of CODCr exceeds 50％,all the removal rates of NH3-N,TN,and TP exceed 80％.Based on the treat-ment effects of sediment and overlying water,it can be seen that the activated carbon-fixed activated sludge system has the best performance,followed by the zeolite-fixed activated sludge system.
关键词
轻度淤积底泥/底泥原位修复/载体/活性污泥Key words
mildly silted sediment/in-situ remediation of sediment/carrier/activated sludge引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据