Pretreatment for High Strength Ammonium in Piggery Wastewater by Natural Zeolite
Effeets of Chinese natural zeolite on the removal of high concentration ammonium contained in piggery wastewater were evaluated to prevent its inhibition on methane fermentation in this study.Orthogonal experiment was designed with 7 factors at 3 levels to systematically analyze the infhencing factors, subsequently to obtain the optimum conditions.The optimum values of influencing factors and their ranks were as follows: ammoninm concentration (3000 me/L) > particle size (1-2.5 ram) > temperature (55 ℃) > pH (7) > dosage (35 g) > stirring rate (150 r/min) > dextrose concentration (10 g/L).Ion exchange was predominant compared to the physical adsorption during this process.The ammonium removal efficiency for piggery wastewater under the optimal conditions reached 35.8%6, which was less than 72.2% for simuhted wastewater.It was mainly due to that the concentration of ammonium in the piggery wastewater was lower than thesimulation wastewater.Results indicated that natural zeolite could be applied in piggery wastewater pretreatment for higherammoninm removal.
Ammonium Orthogonal experiment Optimum condition Piggery wastewater
Ziyao Lian Shuang Tong Baogang Zhang Weiwu Hu Nan Chen Chuanping Feng Weiwei Huang
Key Laboratory of Groundwater Circulation and Evolution (China University of Geosciences Beijing),Mi School of Water Resources and Environment,China University of Geosciences Beijing,Beijing 100083,Chi
国际会议
浙江嘉兴
英文
70-77
2013-10-24（万方平台首次上网日期，不代表论文的发表时间）