Effect of sludge reduction in oxic-settling-anaerobic (OSA) systems with different anaerobic hydraulic retention times (HRTs). Issue 23 (14th May 2016)

• Record Type: Journal Article
• Authors: Sun, Lianpeng; Chen, Lili; Cai, Simin; Guo, Wuzhen; Ye, Tingjin; Cui, Yuhan
• Is Part Of: Desalination and water treatment. Volume 57:Issue 23(2016)
• Page Start: 10523
• Page End: 10527
• Publication Date: 2016-05-14
• Subjects: Anaerobic -- Hydraulic retention time (HRT) -- Oxic-settling-anaerobic (OSA) system -- Sludge reduction -- Sewage treatment; Saline water conversion -- Periodicals; Saline water conversion; Water -- Purification; Periodicals; 628.167
• DOI: 10.1080/19443994.2015.1038736
• Languages: English
• ISSNs: 1944-3994

Abstract

Abstract: The performance of an oxic-settling-anaerobic (OSA) system in terms of sludge reduction was investigated for various anaerobic hydraulic retention times (HRTs) (7 d, 5 d, 3 d, 1 d, 12 h, and 6 h) for a sequencing batch reactor (SBR)-OSA system. Compared to the traditional SBR system, the rates of sludge reduction in the 7d, 5d-1, 5d-2, 3d, and 1d OSA systems were observed to be 66.6, 57.7, 52.5, 50.0, and 48.5%, respectively. In terms of the apparent yield and actual yield of sludge, the OSA systems with longer HRTs exhibited lower sludge yields and better sludge reduction performance. The systems with an HRT > 1 d achieved a considerable increase in sludge reduction, whereas those with an HRT < 1 d did not. The anaerobic HRT was observed to be an important factor in determining the sludge reduction of OSA systems.