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BioMed Research International
Volume 2017 (2017), Article ID 3691819, 5 pages
https://doi.org/10.1155/2017/3691819
Research Article

Study of Nitrogen Removal Performance When Treating Low Carbon Sewage Using External Solid Carbon Sources in SBBR Systems

1School of Civil Engineering, Guangzhou University, Guangzhou 510006, China
2Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, China
3School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China

Correspondence should be addressed to Shu-geng Li

Received 27 October 2017; Accepted 22 November 2017; Published 14 December 2017

Academic Editor: Bin Ma

Copyright © 2017 Li-qiu Zhang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Based on low carbon wastewater as the research object and using corncob as an external solid carbon source, the performance of corncob organic matter was assessed for its release potential, quantity of release, and safety of use. The effects of varying quantities of the solid carbon source on simultaneous nitrification and denitrification were investigated in a sequencing biofilm batch reactor (SBBR). Results show that the regularity of corncob as solid carbon source material was linear, with released concentrations of heavy metals being below the Chinese national standard limit values for heavy metals according to the surface water environment quality standards (I and II) (GB3838-2002). When temperatures were within 28~31°C, the dissolved oxygen level was  mg/L and the pH conditions were within 7.5~8.0. The optimal quantity for corncob dosing was 5 g per 1.5 L of low carbon wastewater. Following treatment, the average effluent concentrations of -N and TN were 2.85 mg/L and 4.51 mg/L, respectively. The effluent concentration of -N, TN had reached the A level national standard of sewage treatment plant pollutant discharge standard (GB18918-2002).