Aerobic granular sludge (AGS) is an energy efficient and compact biological wastewater treatment process. There is only one commercially available AGS technology which utilizes sequencing batch reactors (SBR). Many existing wastewater treatment facilities consist of long, continuous flow reactors that would not be readily suitable for retrofit to SBR. Therefore, a continuous flow process is preferred for municipalities that cannot economically invest in the only commercially available SBR technology (i.e., Nereda®). Lab- and pilot-scale experimentation has demonstrated that stable granulation can be achieved in a continuous flow configuration suitable for retrofit into existing infrastructure. An anoxic/anaerobic/aerobic configuration can be designed and stably operated for conversion of flocculent biomass to AGS. Preliminary pilot-scale results on primary effluent from a municipal wastewater treatment facility indicated that granules of 0.2-0.5 mm, SVI 75 mL/g, and SV30 min/SVI5 min 70% can be formed within a month of steady operation.
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机译：好氧颗粒污泥（AGS）是一种高效节能的紧凑型生物废水处理工艺。目前只有一种可利用测序间歇反应器（SBR）的AGS技术。许多现有的废水处理设施都由长的连续流反应器组成，这些反应器不易改装为SBR。因此，对于不能在经济上投资唯一的商业SBR技术（即Nereda ®）的市政当局，最好采用连续流程。实验室和中试规模的实验表明，可以在适合于改造现有基础设施的连续流配置中实现稳定的制粒。可以设计并稳定运行缺氧/厌氧/好氧结构，以将絮凝生物质转化为AGS。对市政污水处理厂的主要废水进行的初步中试规模结果表明，颗粒为0.2-0.5 mm，SVI <75 mL / g和SV 30 min / SVI 5 min 70％的子级。
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