The application of aerobic granular sludge (AGS) is a promising biological method for wastewater treatment. In the present study, the AGS method was used for the treatment of petroleum wastewater. The granulation process and organic/nitrogen compound removal efficiencies were determined and correlated with the microbiological communities. Granulation of the aerobic sludge occurred after 35 days of operation. The compacted granules had a diameter of 0.46–0.9 mm. Extracellular polymeric substances (EPS) contents increased as granulation progressed and reached 128 mg/g·VSS. The granulated sludge efficiently reduced COD by 95% and petroleum compound contents by 90%. NH₄⁺-N and TN removal were inefficient due to the inhibition of nitrobacteria and denitrificans, but were significantly improved by the addition of glucose. The microorganisms in the granules capable of degrading petroleum chemicals consisted of the genera Propioniciclava, Micropruina, Alphaproteobacteria, Flavobacterium, and Sulfuritalea.

好氧颗粒污泥（AGS）的应用是一种有前途的废水处理生物方法。在本研究中，AGS方法用于处理石油废水。确定了制粒过程和有机/氮化合物去除效率，并将其与微生物群落相关联。运营35天后，好氧污泥颗粒化。压实的颗粒直径为0.46-0.9 mm。随着制粒的进展，胞外聚合物（EPS）的含量增加，达到128 mg / g·VSS。颗粒状污泥有效地减少了95％的COD和90％的石油化合物含量。NH ₄ ⁺-N和TN的去除由于硝化细菌和反硝化酶的抑制而效率不高，但是通过添加葡萄糖可以显着改善-N和TN的去除。能够降解石油化学物质的颗粒中的微生物包括丙酸杆菌属，微菌属，丙酸杆菌属，黄杆菌属和硫磺菌属。