دورية أكاديمية
Combined conditioning of inorganic coagulant and polyamine to improve the dewaterability of municipal sludge, minimize dosage and reduce the influence of filtrate
| العنوان: | Combined conditioning of inorganic coagulant and polyamine to improve the dewaterability of municipal sludge, minimize dosage and reduce the influence of filtrate |
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| المؤلفون: | Baolv Hua, Shichao Zhao, Fengting Li |
| المصدر: | Water Science and Technology, Vol 87, Iss 7, Pp 1600-1615 (2023) |
| بيانات النشر: | IWA Publishing, 2023. |
| سنة النشر: | 2023 |
| المجموعة: | LCC:Environmental technology. Sanitary engineering |
| مصطلحات موضوعية: | coagulation–flocculation process, polyamine (pa), reject water, sludge dewatering optimization, Environmental technology. Sanitary engineering, TD1-1066 |
| الوصف: | Efficient dewatering of sludge is necessary for its cost-effective transportation and final disposal. However, the common method of using polyferric sulfate (PFS) and polyacrylamide (PAM) requires a large amount of dosage and produces high iron ion content in the filtrate. This study examined a solution of applying polyamine (PA) coupled with inorganic coagulant PFS. The results demonstrated that using PFS + PA together could achieve the same or similar filtering rates as using PFS + PAM. The capillary suction time (CST) of PFS + PA (89.0 s) was equivalent to that of PFS (75.1 s) and better than that of PA (117.1 s) and raw sludge (RS, 403.8 s). Compared with PFS + PAM, the combination of PFS and PA efficiently removed Fe ions and chemical oxygen demand (COD) in sludge water content, with Fe ions in the sludge filtrate reduced by 97.8% and COD reduced by 78.9%, respectively. By analyzing the basic physicochemical properties of the sludge system, including the synergistic effect of coagulation and flocculation, sludge hydrolysis and flocculation, it indicated that PA + PFS could reduce bound water. These results demonstrated that combining PFS and PA to improve sludge dewatering performance is more beneficial than utilizing a coagulant or flocculant alone, even PFS + PAM. HIGHLIGHTS Pretreatment of sludge with minimal chemicals.; Reduction of metal content in the treated sludge filtrate.; |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 0273-1223 1996-9732 |
| العلاقة: | http://wst.iwaponline.com/content/87/7/1600Test; https://doaj.org/toc/0273-1223Test; https://doaj.org/toc/1996-9732Test |
| DOI: | 10.2166/wst.2023.044 |
| الوصول الحر: | https://doaj.org/article/90e104e68a8d43d8bbcd3a728f6250aaTest |
| رقم الانضمام: | edsdoj.90e104e68a8d43d8bbcd3a728f6250aa |
| قاعدة البيانات: | Directory of Open Access Journals |
| تدمد: | 02731223 19969732 |
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| DOI: | 10.2166/wst.2023.044 |