不同粒径的生物絮团氨氮处理能力和营养成分组成  

Ammonia nitrogen treatment capacity and nutrient composition of bioflocs with different particle sizes

作　　者：张扬 杨逸尊 陈晓庆[1] 谭洪新[1,2,3] 罗国芝[1,2,3] ZHANG Yang;YANG Yizun;CHEN Xiaoqing;TAN Hongxin;LUO Guozhi(Shanghai Aquaculture Engineering Technology Research Center,Shanghai Ocean University,Shanghai 201306,China;Key Laboratory of Freshwater Aquatic Germplasm Resources,Ministry of Agriculture and Rural Affairs,Shanghai Ocean University,Shanghai 201306,China;International Experimental Teaching Demonstration Center for Aquatic Science,Ministry of Education,Shanghai Ocean University,Shanghai 201306,China)

机构地区：[1]上海海洋大学,上海市水产养殖工程技术研究中心,上海201306 [2]上海海洋大学,农业农村部淡水水产种质资源重点实验室,上海201306 [3]上海海洋大学,教育部水产科学国际级实验教学示范中心,上海201306

出　　处：《中国水产科学》2020年第3期295-306,共12页Journal of Fishery Sciences of China

基　　金：国家自然科学基金项目(31202033)

摘　　要：使用悬浮式生物反应器(suspended growth reactor,SGRs)研究了生物絮团粒径对絮团的硝化氨氮能力和同化氨氮能力的影响。硝化作用条件下,未分筛组、粒径大于等于50μm的絮团组(≥50μm组)和粒径小于50μm的絮团组(<50μm组)总氨氮(total ammonia nitrogen,TAN)去除速率分别为(1.33±0.01)mg TAN/(g TSS·h)、(1.62±0.04)mg TAN/(g TSS·h)和(1.64±0.06)mg TAN/(g TSS·h);同化作用条件下,三组的TAN去除速率分别为(2.83±0.08)mg TAN/(g TSS·h)、(3.34±0.12)mg TAN/(g TSS·h)和(3.52±0.12)mg TAN/(g TSS·h)。≥50μm组与<50μm组的TAN去除速率、亚硝态氮(NO2–-N)、硝态氮(NO3–-N)和总氮(total nitrogen,TN)的最终浓度差异均不显著(P>0.05)。检测了溶解性有机碳(dissolved organic carbon,DOC)、粗蛋白(crude protein)、总脂肪(crude fat)、氨基酸(amino acid)、脂肪酸(fatty acids)、粗灰分(crude ash)、碳氮比(carbon to nitrogen ratio,C/N)、挥发性悬浮固体(volatile suspended solids,VSS)和活性污泥比好氧速率(specific oxygen uptake rate,SOUR)等指标,比较结果表明,絮团粒径对硝化氨氮、同化氨氮效率没有显著影响,对絮团的营养价值有显著影响。In this study,suspended growth reactors(SGRs)were used to evaluate the effect of floc particle size on nitrification and assimilation capacity.In bioflocculation,there are flocs of various sizes;the size of the bioflocculation is affected by the aeration intensity and the osmotic pressure and the size of the floc is adjusted to achieve the strongest water treatment capacity.Therefore,the differences between flocs of different sizes and their role in water treatment are worth exploring.The purpose of this study was to investigate the effect of floc particle size on assimilation,nitrification,and nutrient values.Three treatment groups were set up;the<50μm particle size group,the>50μm particle size group,and the unscreened group.Under nitrification conditions,the total ammonia nitrogen(TAN)removal rates of the unscreened group,>50μm group,and<50μm group were(1.33±0.01)mg TAN/(g TSS·h),(1.62±0.04)mg TAN/(g TSS·h),and(1.64±0.06)mg TAN/(g TSS·h),respectively;under assimilation conditions,the TAN removal rates of the three groups were(2.83±0.08)mg TAN/(g TSS·h),(3.34±0.12)mg TAN/(g TSS·h),and(3.52±0.12)mg TAN/(g TSS·h),respectively.There were no significant differences in the TAN removal rates,nitrite nitrogen(NO2–-N),nitrate nitrogen(NO3–-N),and total nitrogen(TN)between the>50μm and the<50μm group(P>0.05).We also measured the dissolved organic carbon(DOC),crude protein,crude fat,amino acids,fatty acids,crude ash,carbon to nitrogen ratio(C/N),volatile suspended solids(VSS),specific oxygen uptake rate(SOUR),and other indicators.The total fat content was higher in the>50μm group and the crude protein content was higher in the<50μm group.Our results showed that the floc particle size had no significant effect on the nitrification and assimilation reactions;under different reaction conditions,the floc particle size affected the nutritional value of bioflocculation and it also affected greatly the microbial community composition.Our results also showed that sieving might have had some effect on the f

关 键 词：絮团粒径 异养同化 自养硝化过程 营养成分 

分 类 号：S917[农业科学—水产科学]