Sewage sludge disintegration by high-pressure homogenization: A sludge disintegration model

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• 作者：Yuxuan Zhang ; Panyue Zhang ; ^{panyue_zhang@bjfu.edu.cn} ; Boqiang Ma ; Hao Wu ; Sheng Zhang ; Xin Xu
• 关键词：high-pressure homogenization ; sludge disintegration ; homogenization pressure ; homogenization cycle number ; total solid content
• 刊名：Journal of Environmental Sciences
• 出版年：2012
• 期刊代码：8_10010742
• 类别：env
• 出版时间：May, 2012
• 卷：24
• 期：5
• 页码：814-820
• 文件大小：140 K

摘要

High-pressure homogenization (HPH) technology was applied as a pretreatment to disintegrate sewage sludge. The effects of homogenization pressure, homogenization cycle number, and total solid content on sludge disintegration were investigated. The sludge disintegration degree (DD_COD), protein concentration, and polysaccharide concentration increased with the increase of homogenization pressure and homogenization cycle number, and decreased with the increase of sludge total solid (TS) content. The maximum DD_COD of 43.94%was achieved at 80 MPa with four homogenization cycles for a 9.58 g/L TS sludge sample. A HPH sludge disintegration model of DD_COD= kN^aP^b was established by multivariable linear regression to quantify the effects of homogenization parameters. The homogenization cycle exponent a and homogenization pressure exponent b were 0.4763 and 0.7324 respectively, showing that the effect of homogenization pressure (P) was more significant than that of homogenization cycle number (N). The value of the rate constant k decreased with the increase of sludge total solid content. The specific energy consumption increased with the increment of sludge disintegration efficiency. Lower specific energy consumption was required for higher total solid content sludge.