Enhancement of removal efficiency of ammonia nitrogen in sequencing batch reactor using natural zeolite |
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| Authors: | Yun-Xia Wei Yan-Feng Li Zheng-Fang Ye |
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| Institution: | (1) State Key Laboratory of Applied Organic Chemistry, College of Resources and Environment, College of Chemistry and Chemical Engineering, Institute of Biochemical Engineering & Environmental Technology, Lanzhou University, 730000 Lanzhou, People’s Republic of China;(2) Department of Environmental Engineering, Institute of Environmental Sciences & Technology, Beijing University, 100871 Beijing, People’s Republic of China;(3) College of Chemistry and Environmental Science, Lanzhou City University, 730070 Lanzhou, People’s Republic of China |
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| Abstract: | Two sets of lab-scale sequencing batch reactors (SBR), i.e., control SBR and SBR using zeolite as carrier (zeo-SBR), were
applied to assess nitrogen removal efficiency. The test results revealed that zeolite powder added in SBR could improve its
performance. Due to the combination of zeolite adsorption for NH4
+–N and enhanced simultaneous nitrification and de-nitrification (SND), a higher removal ratio of ammonia nitrogen in wastewater
was observed in the test reactor, and the introduction of zeolite powder was helpful to inhabit sludge bulging comparing with
the control SBR, in other words, activated sludge immobilized by zeolite powder could remove NH4
+–N, COD, and PO4 significantly in a shorter cycle time. Applied two hydraulic retention times (HRTs) showed that the nitrogen and phosphorus
removal could be improved while adapting to load variations. |
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