- 摻加頁巖后污泥沉降濃縮效果與利用
- Thickening Properties and Utilization of Sewage Sludge Modified by Shale
- 錢覺時， 岳燕飛， 謝從波， 陳偉
- 土木與環(huán)境工程學(xué)報（中英文） 2010年32卷第2期 頁碼：140-144
- DOI：10.11835/j.issn.1674-4764.2010.02.026
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紙質(zhì)出版日期：2010
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摘要
改善污水污泥濃縮和脫水性能有利于污泥的處置和利用。試驗研究了頁巖細度和摻量在污泥沉降濃縮過程中的作用。結(jié)果顯示，頁巖粉細度為250～150 μm，摻量≤5﹪時，摻加頁巖粉可改善污泥沉降濃縮性能，沉降濃縮后污泥體積沒有明顯增加；摻加5%頁巖的污泥沉降濃縮后含水率可控制在80%左右，經(jīng)過離心脫水后含水率可降低至60%以下。試驗結(jié)果還表明，雖然摻加頁巖的污泥脫水后體積有一定程度增加，但可以明顯改善污泥的性態(tài)，減少資源化利用中與頁巖混合過程，還能明顯降低污泥的氣味；經(jīng)頁巖改性后濃縮脫水得到的污泥能用于燒制輕質(zhì)陶粒。
Abstract
It is beneficial for disposal and utilization to improve thickening and dehydration properties of sewage sludge.The influence of dosage and fineness of shale on sludge settlement were investigated experimentally.And It was shown that the addition of shale could improve the sludge thickening without volume increment when the shale dosage with fineness of 250～150 μm was less than 5%.The moisture content of thickened and dehydration sludge with 5%shale dosage were 80% and less than 60%, respectively.The addition of shale during the sludge settlement could improve the uniformity of the mixture of sludge and shale, which was favorite for producing building materials, and alleviate the smell of sludge in despite of increase in some extent in volume afterdehydration.The dehydrationsludge modified by shale could be used as raw materials to produce excellent expanded shale.
