皂荚籽填料曝气生物滤池处理氨氮废水研究
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摘要
选取具有特殊形状和组成的天然皂荚籽作为曝气生物滤池(BAF)的填料和固体碳源处理NH_3-N废水,研究皂荚籽作为释碳填料的性能,以皂荚籽、体积比为1:2的皂荚籽-陶粒混合填料分别搭建BAF,在不添加外加碳源条件下处理低C/N低含量NH_3-N模拟废水,分别考察2种BAF的挂膜特性以及处理NH_3-N废水的性能。结果表明,皂荚籽作为释碳填料具有良好的外形和尺寸、生物和化学稳定性;静态NH_3-N吸附量较小,难以直接作为吸附材料处理NH_3-N废水;2种BAF在实验期内持续释碳,释碳量可以满足微生物需求;皂荚籽BAF和皂荚籽-陶粒BAF的NH_3-N去除率分别可达50%和93.9%。说明皂荚籽可以作为一种具有利用价值的释碳填料。
Natural gleditsia sinensis seed with special shapes and compositions were selected as BAF fillers and solid carbon sources to treat ammonia nitrogen wastewater, and studied the performance of the gleditsia sinensis seed as carbon release filler. The gleditsia sinensis seed and the mixture of 1:2 volume of the gleditsia sinensis seed-ceramsite filler were built two BAF, it was used to treat the low C/N and low concentration ammonia nitrogen wastewater without adding the carbon source. The experiment was investigated the properties of biofilm formation and the removal effect of ammonia nitrogen in wastewater of two BAF. The results showed that the main components of the gleditsia sinensis seed were organic matter, and it had good shape and size as carbon release filler, the biological and chemical stability was also great. The adsorption capacity of static ammonia nitrogen of gleditsia sinensis was too small to treat ammonia nitrogen wastewater. Two kinds of BAF had sustained release carbon in the experimental period and carbon content could meet the needs of micro-organisms. The removal rate of ammonia nitrogen of gleditsia sinensis seed BAF could reach 50%, and the gleditsia sinensis seedceramsite BAF could reach 93.9%. This suggested that gleditsia sinensis seed could be used as an valuable carbon release filler.
Natural gleditsia sinensis seed with special shapes and compositions were selected as BAF fillers and solid carbon sources to treat ammonia nitrogen wastewater, and studied the performance of the gleditsia sinensis seed as carbon release filler. The gleditsia sinensis seed and the mixture of 1:2 volume of the gleditsia sinensis seed-ceramsite filler were built two BAF, it was used to treat the low C/N and low concentration ammonia nitrogen wastewater without adding the carbon source. The experiment was investigated the properties of biofilm formation and the removal effect of ammonia nitrogen in wastewater of two BAF. The results showed that the main components of the gleditsia sinensis seed were organic matter, and it had good shape and size as carbon release filler, the biological and chemical stability was also great. The adsorption capacity of static ammonia nitrogen of gleditsia sinensis was too small to treat ammonia nitrogen wastewater. Two kinds of BAF had sustained release carbon in the experimental period and carbon content could meet the needs of micro-organisms. The removal rate of ammonia nitrogen of gleditsia sinensis seed BAF could reach 50%, and the gleditsia sinensis seedceramsite BAF could reach 93.9%. This suggested that gleditsia sinensis seed could be used as an valuable carbon release filler.
引文
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[3]左卫元,仝海娟,史兵方.芒果核壳炭的制备及对水中Cr6+的吸附[J].环境工程学报,2016(8):4134-4140.
[4]丁绍兰,齐泽宁,谢林花.核桃壳吸附废水氨氮的动力学和影响因素[J].环境工程学报,2016(2):581-585.
[5]谢林花,丁绍兰,董凌霄,等.核桃壳动态吸附氨氮的影响因素及动力学研究[J].陕西科技大学学报(自然科学版),2016,34(5):34-38.
[6]贾丽娟.核桃壳填料曝气生物滤池去除废水中氨氮的研究[D].西安:陕西科技大学,2012.
[7]丁绍兰,谢林花,马蕊婷.壳类生物质释碳性能研究[J].环境污染与防治,2016,38(10):1-5.
[8]邵留,徐祖信,王晟,等.新型反硝化固体碳源释碳性能研究[J].环境科学,2011,32(8):2323-2327.
[9]邹娟,郭雪松,李琳,等.天然沸石对氨氮的吸附特性研究[J].山西大学学报(自然科学版),2011,34(3):485-491.