| 强化一级处理污泥的吸附性能研究 |
| 摘要点击 1398 全文点击 1900 投稿时间：1998-09-30 |
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| 中文关键词 生物吸附 污泥 吸附等温线 吸附动力学 |
| 英文关键词 biosorption sludge biosorption isotherm biosorption dynamics |
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| 中文摘要 |
| 强化一级处理污泥对以COD和SCOD表示的有机物质具有较大的吸附量。其吸附等温线和解吸等温线既符合Freundlich型,也符合Langmuir型,但解吸不完全。生物吸附量受温度影响较大,q20>q8>q32.达到吸附平衡约需30min左右,其吸附速率常数为:kad.COD=0.0421min-1,kad.SCOD=0.0508min-1;颗粒内扩散速率常数为:kid.COD=2.1776mg·g-1·min-1/2,kid.SCOD=1.3026mg·g-1·min-1/2。 |
| 英文摘要 |
| Biosorption of organic pollutants, expressed as COD and SCOD, by enhanced primary treatment sludge was studied. The biosorption isotherm well fit both the Freundlich equation and the Langmuir equation and the desorption of organic pollutants is incomplete. The biosorption amount is considerably affected by temperature: q20>q8>q32. It need about 30 minutes to reach biosorption equilibrium. The rate constants of biosorption, kad, are as follows: kad,COD=0.0421 min-1,kad,SCOD=0.0508 min-1. The rate controlling step is mainly intraparticle diffusion and the rate constants of intraparticle diffusion are 2.1776 mg·g-1·min-1/2(COD) and 1.3026 mg·g-1·min-1/2(SCOD) respectively. |
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