Simultaneous C and N Removal in a Hybrid CAST Reactor

Author

Bian, Dejun ; Guo, Haiyan ; Zhang, Wenhua

Author_Institution

Sch. of Water Conservancy & Environ., Changchun Inst. of Technol., Changchun, China

fYear

2009

fDate

11-13 June 2009

Firstpage

1

Lastpage

4

Abstract

Cyclic Activated Sludge Technology (CAST) is one of the variations of SBR processes. In this experiment, suspended media were introduced into the CAST reactor to increase the quantity of microorganism and micro anoxic environment. Simultaneous carbon and nitrogen removal performance of the hybrid CAST reactor was investigated. The experiment results demonstrated that more than 96% COD and 98% TN removal were achieved when the influent COD was 4686-5781 mg/L and TN was 180 mg/L, the removal rate of COD and TN reached to 3.05-3.77 kgCOD/(m3.d) and 0.12 kgTN/(m3.d) respectively. Nitrogen track studies indicated that TN was mainly removed though SND mechanism with nitrite as the intermittent product. The occurrence of SND during the aeration period was resulted from the existence of micro anoxic environment in the suspended carriers of the reactor.

Keywords

biochemistry; carbon; industrial waste; microorganisms; nitrogen; sludge treatment; suspensions; wastewater treatment; C; COD removal; N; aeration period; carbon removal; cyclic activated sludge technology; hybrid CAST reactor; intermittent product; microanoxic environment; microorganism; nitrite; nitrogen track; suspended media; total nitrogen removal; Bioreactors; Chemical engineering; Effluents; Filling; Inductors; Microorganisms; Nitrogen; Sludge treatment; Wastewater treatment; Water conservation;

fLanguage

English

Publisher

ieee

Conference_Titel

Bioinformatics and Biomedical Engineering , 2009. ICBBE 2009. 3rd International Conference on

Conference_Location

Beijing

Print_ISBN

978-1-4244-2901-1

Electronic_ISBN

978-1-4244-2902-8

Type

conf

DOI

10.1109/ICBBE.2009.5163401

Filename

5163401