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Lu H.,Zhejiang University | Ding S.,Zhejiang University | Wu Z.,Jinhua Tianyi Environmental Protection Technology Co. | Wu D.,Jinhua Tianyi Environmental Protection Technology Co. | And 4 more authors.
Chinese Journal of Environmental Engineering | Year: 2014

The stability of pilot-scale spiral automatic circulation (SPAC) anaerobic reactor with a capacity of 50 m3 treating high concentration pharmaceutical wastewater was investigated. The Augmented Dickey-Fuller unit boot test was introduced to evaluate the stationarity of start-up and running of SPAC reactor. The results showed that the start-up and running periods were stationary. The SPAC reactor had a good ability to resist influent concentration shock and hydraulic shock. The withstand maximum influent concentration shock strength was above 60000 (mg·h)/L (influent COD concentration increased by 200%), and the withstand maximum hydraulic shock strength was 300 (m3·h)/d (inflow rate increased by 50%). The SPAC reactor also had a good recovery capability. During the running period, SPAC reactor suffered from acidification due to the suddenly drop of influent pH to 5.74, the recovery degree of effluent COD concentration, COD removal efficiency and VRR was 80%~90% after 30 days' recovery.


Ding S.,Zhejiang University | Zheng P.,Zhejiang University | Zhang Z.,Zhejiang University | Lu H.,Zhejiang University | And 3 more authors.
Shengwu Gongcheng Xuebao/Chinese Journal of Biotechnology | Year: 2014

In order to broaden the application area of the new nitrogen removal technology, a full-scale system for short-cut nitrification and anaerobic ammonium oxidation (Anammox) was investigated in the nitrogen removal from a strong-ammonium pharmaceutical wastewater. When the influent ammonium concentration was (430.40±55.43) mg/L, ammonia removal efficiency was (81.75±9.10)%. The short-cut nitrification and Anammox system could successfully remove nitrogen from the pharmaceutical wastewater. The start-up of short-cut nitrification system took about 74 d and the nitrite accumulation efficiency was (52.11±9.13)%, the two-step mode using synthetic wastewater and actual wastewater was suitable for the start-up of short-cut nitrification system. The start-up of Anammox system took about 145 d and the maximum volumetric nitrogen removal rate was 6.35 kg N/(m3·d), dozens of times higher than those for the conventional nitrification-denitrification process. The strategy achieving Anammox sludge by self-growth and biocatalyst addition was suitable for the start-up of Anammox system. ©2014 Chin J Biotech, All rights reserved.


Lu H.,Zhejiang University | Wu D.,Jinhua Tianyi Environmental Protection Technology Co. | Wu Z.,Jinhua Tianyi Environmental Protection Technology Co. | Ding S.,Zhejiang University | And 6 more authors.
Huanjing Kexue Xuebao/Acta Scientiae Circumstantiae | Year: 2013

The performance of pilot-scale spiral automatic circulation (SPAC) anaerobic reactor with a capacity of 50 m3 in treating high concentration analgin pharmaceutical wastewater was investigated. The results showed that the SPAC reactor had high volumetric COD removal rate (VRR) of (26.54±4.61) kg·m-3·d-1, volumetric gas production rate (VPR) of (9.55±1.66) m3·m-3·d-1 and COD removal efficiency of 94.8% at (30±5) °C when the influent COD concentration was about 10000~14000 mg·L-1 and the hydraulic retention time (HRT) was 12 h. According to the results from Monod equation fitting and load shock test, the highest volumetric efficiency of SPAC reactor were extrapolated to be 46.08 and 75.00 kg·m-3·d-1, respectively. The SPAC reactor displayed good performances in shock loading tests by increasing influent COD concentration or inflow rate. When the influent COD concentration increased by 200% or the inflow rate increased by 50%, the COD removal rates remained stable, and the COD removal efficiency stayed above 95%. The SPAC reactor was suitable for the treatment of analgin pharmaceutical wastewater with COD concentration of 30000 mg·L-1 and HRT longer than 12 h.

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