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首页> 外文期刊>Journal of Residuals Science & Technology >Alum Recovery and Sludge Stabilization with Sulfuric Acid in an APT Wastewater Treatment Plant
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Alum Recovery and Sludge Stabilization with Sulfuric Acid in an APT Wastewater Treatment Plant

机译：APT废水处理厂中的明矾回收和用硫酸稳定污泥

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Coagulation-flocculation can be used to remove helminth ova and phosphorus from wastewater intended for agricultural reuse. Nevertheless, it has the drawback of producing a large amount of sludge that together with the chemicals needed for the process increases the operating cost. By recovering and recycling aluminum with an acid process the operating cost can be reduced by: (a) diminishing alum demand and (b) producing a lower amount of partially treated sludge. Adding sulfuric acid to lower pH to 2 for 30 min, at a TS under 6% and 300 rpm, 70% of the aluminum added was recovered reducing the sludge volume by 45% and mass volume by 63%, and inactivating 5 logs of fecal coliforms and 68% of helminth ova. Due to the lower alum consumption, the cost is reduced by 3.78 US
机译：混凝-絮凝可用于去除打算用于农业再利用的废水中的蠕虫卵和磷。然而，其具有产生大量污泥的缺点，该污泥与该过程所需的化学物质一起增加了运行成本。通过用酸法回收和再循环铝，可以通过以下方式降低运营成本：（a）减少明矾需求，以及（b）产生较少量的经部分处理的污泥。在6％和300 rpm的TS下加入硫酸将pH降低到2，持续30分钟，回收了70％的铝，减少了45％的污泥和63％的质量的粪便，并灭活了5条粪便。大肠菌群和68％的蠕虫卵。由于减少了明矾消耗，成本降低了3.78美元

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