Institute for Environment and Resources, Vietnam National University-Ho Chi Minh City, 142 To Hien Thanh Street, District 10, Ho Chi Minh City, 700000, Viet Nam; Department of Chemistry, Biology and Environment, Pham Van Dong University, 509 Phan Dinh Phung Street, Quang Ngai City, 570000, Viet Nam.
Institute for Environment and Resources, Vietnam National University-Ho Chi Minh City, 142 To Hien Thanh Street, District 10, Ho Chi Minh City, 700000, Viet Nam.
J Environ Manage. 2018 Jul 15;218:39-49. doi: 10.1016/j.jenvman.2018.04.041. Epub 2018 Apr 14.
The formation of aerobic granular sludge was carried out in a sequencing batch reactor (SBR) for tapioca processing wastewater treatment. The effect of organic loading rates (OLRs) in the range of 2.5-10.0 kg COD m day on the granulation was investigated. The size and settleability of the aerobic granular sludge increased with increasing OLR from 2.5 to 7.5 kg COD m day. The mature granules had an average size of 2.5 mm and good settleability with the sludge volume index (SVI) lower than 50 mL g. The granules had a layered structure consisting of anoxic sludge core with nematodes and an outer aerobic layer surrounded by stalked ciliates. Removal efficiencies of chemical oxygen demand (COD) and NH-N reached 90.0%-93.0% and 86.6%-92.5%, respectively. Simultaneous nitrification and denitrification at the OLR of 7.5 kg COD m day resulted in the improvement of total nitrogen (TN) removal efficiency to 66.1%.
采用序批式反应器（SBR）处理木薯加工废水，进行好氧颗粒污泥的形成研究。考察了有机负荷率（OLR）在 2.5-10.0kg COD m day 范围内对颗粒化的影响。好氧颗粒污泥的粒径和沉降性能随着 OLR 从 2.5 增加到 7.5kg COD m day 而增加。成熟的颗粒粒径平均为 2.5mm，沉降性能良好，污泥体积指数（SVI）低于 50mL g。颗粒具有分层结构，由带线虫的缺氧污泥核和被有柄纤毛虫包围的好氧外层组成。化学需氧量（COD）和 NH-N 的去除效率分别达到 90.0%-93.0%和 86.6%-92.5%。在 7.5kg COD m day 的 OLR 下同时进行硝化和反硝化，使总氮（TN）去除效率提高到 66.1%。
