E3S Web Conf.
Volume 38, 20182018 4th International Conference on Energy Materials and Environment Engineering (ICEMEE 2018)
|Number of page(s)||6|
|Section||Environmental Science and Environmental Engineering|
|Published online||04 June 2018|
Granulation for Coking Wastewater Treatment in a Coupled Anaerobic-Aerobic Reactor
Taiyuan University Department of Environmental Engineering Taiyuan, 030009, China
2 Harbin Institute of Technology School of Municipal and Environmental Engineering Harbin, 150001, China
* Corresponding author: email@example.com
A coupled anaerobic-aerobic granular bio-film reactor was employed with two operation stages: Stage I, granular sludge was formed from digestion sludge using brewery wastewater, and Stage II, granular sludge was acclimatized using coking wastewater. Two oxygenation methods (i.e. A and B) were employed to acclimatize the granules. For method A, dissolved O 2 was supplied through a continuous oxygenation way of 800-15000ml-min-1 . And for method B, dissolved O2 was supplied of 800-15000ml-min-1 18-12 times at 20-60min intervals, 1h each time. The experimental results showed that granules could quickly form in 10d in the EGSB reactor seeded with digestion sludge and little loose granules lack of nutrition, and it was the key factor for granules forming to add little loose granules. It took only about 6 months for granules acclimation using coking wastewater. Both oxygenation methods could run well when acclimatizing the granules. However, method A could have comparatively high and stable operation effect. The actual coking wastewater had distinct inhibition effect on the granules, but the supplement of some oxygen could promote the recovery of SMA, and NaHCO3 supplement could also weaken the inhibition effect of the CWW. Method A had more strongly activity recovery ability than method B.
© The Authors, published by EDP Sciences, 2018.
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