|Table of Contents|

Coordinated treatment of actual coking wastewater with diatomite and granular sludge

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

Issue:
2013年05期
Page:
766-
Research Field:
Publishing date:

Info

Title:
Coordinated treatment of actual coking wastewater with diatomite and granular sludge
Author(s):
Dong Chunjuan1Zhai Wei2Feng Meirong3Li Feng2Fan Honghui2
1.Department of Environment Engineering,Taiyuan University,Taiyuan 030009,China; 2.College of Environment Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China; 3.Science and Technology Communication Center,Taiyuan Science and Tec
Keywords:
expanded granular sludge bed reactors diatomite coking wastewater thiocyanate ion phenol ammonia nitrogen
PACS:
X703
DOI:
-
Abstract:
To study the operation characteristic of the coordinated treatment of the actual coking wastewater with diatomite and granular sludge,two 18 L micro-aerobic expanded granular sludge beds(EGSB)reactors fed(R1+R2)with the coking wastewater are operated continuously for a period of over 7 months.The operation process contains three stages:the two-stage micro-aerobic EGSB without diatomite,the single-stage micro-aerobic EGSB with diatomite,and the two-stage micro-aerobic EGSB with diatomite.The results show that the diatomite can enhance the removal rates of chemical oxygen demand(COD),phenol,thiocyanate ion(SCN-)and cyanide in the micro-aerobic EGSB reactor treating actual coking wastewater,and the removal rates of COD,phenol,SCN- and cyanide increase respectively from 62.8%,62.6%,6.8% and 78.0% to 77.7%,96.7%,86.4% and 80.6%.The removal rate of ammonia nitrogen(NH3-N)decreases from 27.4% to negative value(the lowest is -35.0%).The two-stage micro-aerobic EGSB reactor system with diatomite can simultaneously achieve the high removal rates of COD,phenol,SCN-,cyanide and NH3-N.With 12 h+12 h hydraulic residence time(HRT)of R1+R2,the total removal rates of COD,phenol,SCN-,cyanide and NH3-N are 87.0%,99.9%,92.0%,90.6% and 86.0% respectively,and the effluent concentrations are 239.4,0.3,12.5,0.06, and 4.9 mg/L.In the micro-aerobic EGSB reactor with diatomite,the bio-diatomite and granular sludge formed synchronously can ensure the high biomass concentration,the enrichment micro-community and the enough nitrifying bacteria.SCN- and phenol can inhibit the activity of nitrifying bacteria,and the SCN- inhibition is due to the toxicity of SCN- itself,but not the increased loading of ammonia formed from SCN- degradation.The lower SCN- and phenol concentration are needed simultaneously for getting the higher NH3-N removal rate.

References:

[1] Li Y M,Gu G W,Zhao J F,et al.Treatment of coke-plant wastewater by biofilm systems for removal of organic compounds and nitrogen[J].Chemosphere,2003,52:997-1005.
[2]刘伟,游海,姚嫚,等.AO和OAO工艺对焦化废水处理效果的比较[J].燃料与化工,2012.43(1):55-57.
Liu Wei,You Hai,Yao Man,et al.Comparison of AO and OAO processes on coking effluent treatment effect[J].Fuel and Chemical Processes,2012,43(1):55-57.
[3]Zhao W T,Huang X,Lee D J.Enhanced treatment of coke plant wastewater using an anaerobic-anoxic-oxic membrane bioreactor system[J].Separation and Purification Technology,2009,66:279-286.
[4]Chan Y J,Chong M F,Law C L,et al.A review on anaerobic-aerobic treatment of industrial and municipal wastewater[J].Chemical Engineering Journal,2009,155:1-18.
[5]张琦,董春娟,王增长,等.EGSB反应器在微氧条件下去除焦化废水中挥发酚[J].水处理技术,2011,37(11):107-110.
Zhang Qi,Dong Chunjuan,Wang Zengzhang,et al.EGSB reactor removing volatile phenol of coking wastewater under micro-aerobic conditions[J].Technology of Water Treatment,2001,37(11):107-110.
[6]董春娟,刘晓,吕炳南.常温处理生活污水微氧EGSB反应器启动运行特性研究[J].南京理工大学学报,2011,35(2):284-288.
Dong Chunjuan,Liu Xiao,L(¨overv)Bingnan.Startup and performance of micro-aerobic EGSB reactor treating actual domestic wastewater[J].Journal of Nanjing University of Science and Tecnology,2011,35(2):284-288.
[7]耿炤宇.处理焦化废水微氧EGSB反应器启动和运行特性研究[D].太原:太原理工大学环境科学与工程学院,2011.
[8]Wu J L,Yang Y S,Lin J H.Advanced tertiary treatment of municipal wastewater using raw and modified diatomite[J].J Hazard Mater,2005,127:196-203.
[9]国家环保总局水和废水监测分析方法委员会.水和废水监测分析方法[M].北京:中国环境科学出版社,2004.
[10]American Water Works Assocoation.Standard methods for the examination of water and wastewater[M].22nd ed.Washington D C:American Public Health Association,1999:4500-CN-M.

Memo

Memo:
-
Last Update: 2013-10-31