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宁东水厂供水安全保证率高,技术难度大,工程在建设和水处理工艺的选择上采用了国际国内很多新技术、新工艺并且在运行管理中取得了良好地效果[1]。水厂沉淀池是利用重力作用使污水中的固体杂质或活性污泥用沉淀去除的一种净化水质的设备[2-3]。因此提高沉淀池的沉淀效率对水厂的运行管理以及对沉淀池的清洗都是至关重要的。多种因素会影响沉淀池的沉淀效率如污泥及沉淀杂质的自身特性、水力条件、絮凝效果等。因此,模拟宁东一水厂污泥浓缩池工艺,并分别对不同浓度泥水进行了药剂筛选、助凝剂及活性炭复配实验。有助于了解絮凝剂、助凝剂及活性炭的投加对不同浓度的泥水的作用情况,制定合理的药剂、助凝剂及活性炭的投放方案,以此提高浓缩池沉淀效果以及整个污泥回收系统的工作效率。
污泥回收系统浓缩池沉淀效果提升研究
——以宁东水厂为例Study on the Improvement of Sedimentation Effect in the Thickening Tank of Sludge Recovery System ——Take Ningdong Watertreatment Plant as an Example
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摘要: 选取效果好的混凝剂、助凝剂可以提升污水处理厂污泥浓缩池的沉淀效果,从而提升整个污泥回收系统的工作效率。文章采用混凝烧杯实验对宁东水厂浓缩池不同浓度泥水开展药剂筛选、助凝剂及活性炭复配实验,结果显示:在所选混凝剂中壳聚糖季铵盐(Hydroxypropyltrimethyl Ammonium Chloride Chitosan,HACC)混凝效果最好,添加了活性炭后发现其不但能够有效去除沉后水泥溴味而且还能在水处理中起到一定的助凝作用。Abstract: The suitable coagulant and the coagulant aid could effectively improve the sedimentation effect of the sludge in the thickening tank in the sewage treatment plant, thus improving the efficiency of the whole sludge recovery system. In this paper, different coagulants and the activated carbon were selected in the Jar-test experiments for the different sludge concentrations in Ningdong Watertreatment plant. The results showed that the HACC (chitosan quaternary ammonium salt) appeared the best coagulation effect. After adding the activated carbon, it was found that it could not only effectively remove the bromine smell of the sludge, but also play a certain role to promote the coagulation in the Watertreatment plant.
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Key words:
- Ningdong Watertreatment Plant /
- Thickening Tank /
- Flocculant /
- Compound Experiment /
- Coagulation
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表 1 混凝烧杯实验程序
程序 转速/r·min–1 t/min 1 250 0.5 2 200 1.5 3 40 10.0 4 0 30.0 -
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