Please wait a minute...
ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2011, Vol. 12 Issue (5): 390-398    DOI: 10.1631/jzus.A1000304
Chemical & Environmental Engineering     
Water quality improvement of a lagoon containing mixed chemical industrial wastewater by micro-electrolysis-contact oxidization
Ya-fei Zhou, Mao Liu, Qiong Wu
College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China; The Eleventh Design & Research Institute of IT, Co., Ltd, Dalian Office, Dalian 116600, China
Download:     PDF (0 KB)     
Export: BibTeX | EndNote (RIS)      

Abstract  A lagoon in the New Binhai District, a high-speed developing area, Tianjin, China, has long been receiving the mixed chemical industrial wastewater from a chemical industrial park. This lagoon contained complex hazardous substances such as heavy metals and accumulative pollutants which stayed over time with a poor biodegradability. According to the characteristics of wastewater in the lagoon, the micro-electrolysis process was applied to improve the biodegradability before the bioprocess treatment. By the orthogonal experimental study of main factors influencing the efficiency of the treatment method, the best control parameters were obtained, including pH=2.0, a volume ratio of Fe and reaction wastewater of 0.03750, a volume ratio of Fe and the granular activated carbon (GAC) of 2.0, a mixing speed of 200 r/min, and a hydraulic retention time (HRT) of 1.5 h. In the meantime, the removal rate of chemical oxygen demand (COD) was up to 64.6%, and NH4+–N and Pb in the influent were partly removed. After the micro-electrolysis process, the ratio of biochemical oxygen demand (BOD) to COD (B/C ratio) was greater than 0.6, thus providing a favorable basis for bioprocess treatment.

Key words： Memetic algorithm (MA)      Neural network (NN) learning      Back propagation (BP)      Extremal optimization (EO)      Levenberg-Marquardt (LM) gradient search      Basic oxygen furnace (BOF)     
Received: 30 June 2010      Published: 09 May 2011
CLC:  X506  
Service
E-mail this article
Add to my bookshelf
Add to citation manager
E-mail Alert
RSS
Articles by authors
Ya-fei Zhou
Qiong Wu
Mao Liu
Cite this article:

Ya-fei Zhou, Mao Liu, Qiong Wu. Water quality improvement of a lagoon containing mixed chemical industrial wastewater by micro-electrolysis-contact oxidization. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2011, 12(5): 390-398.

URL:

http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.A1000304     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2011/V12/I5/390

[1] Peng Chen, Yong-zai Lu. Memetic algorithms-based neural network learning for basic oxygen furnace endpoint prediction[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2010, 11(11): 841-848.
[2] Dinesh KUMAR, Shakti KUMAR, C. S. RAI. Feature selection for face recognition: a memetic algorithmic approach[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2009, 10(8): 1140-1152.
[3] CHEN Min-rong, LU Yong-zai, YANG Gen-ke. Multiobjective extremal optimization with applications to engineering design[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2007, 8(12): 1905-1911.