Study on biochar-anaerobic activated sludge system to degrade coal gasification wastewater
LI Ya-jie1,3, LIU Hong-bo2,3, ZHANG zhen-jia4
1. School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China; 2. School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China; 3. Jiangsu Key Laboratory of Anaerobic Biotechnology, Jiangnan University, Wuxi 214122, China; 4. School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Abstract: Typical coal gasification wastewater contains high concentration of tar,phenol,ammonia-containing compounds,fluorides,sulphides,heterocycles,polycyclic aromatic hydrocarbon and other toxic and refractory substances,which is difficult to degrade.Bamboo-derived biochar is utilized to set up a biochar-anaerobic activated sludge system that is used to treat with coal gasification wastewater.Influences of pH and mass content of biochar on the treatment efficiency are investigated.Moreover,the test data are fit by the intraparticle diffusion equation.It is indicated that the removal effects of COD and total phenol under pH=8 are better than that under pH=6,and COD content can drop to 600 mg·L-1 and total phenol content can decrease to 50 mg·L-1.Under pH=8,total phenol can be completely removed when the dosage of biochar is 20 g·L-1.Based on fitting the experimental data with intraparticle diffusion equation,the results show that the removal of COD and total phenol depends mainly on the adsorption action of biochar particles in the biochar-anaerobic activated sludge system.
李雅婕, 刘宏波, 张振家. 生物炭-厌氧活性污泥系统降解煤气化废水的研究[J]. 现代化工, 2018, 38(11): 158-162.
LI Ya-jie, LIU Hong-bo, ZHANG zhen-jia. Study on biochar-anaerobic activated sludge system to degrade coal gasification wastewater. Modern Chemical Industry, 2018, 38(11): 158-162.
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