沼液SBR处理出水养殖螺旋藻

发布时间：2018-01-27 05:40

本文关键词： 养猪沼液螺旋藻 SBR 循环利用氨氮　出处：《环境科学》2017年07期 　论文类型：期刊论文

【摘要】：养猪沼液氮磷等营养物质丰富,可作为廉价的螺旋藻培养基,但其成分复杂,尤其是高氨氮等因素严重抑制螺旋藻的生长.采用序批式生物反应器(sequencing batch reactor,SBR)降低沼液中的氨氮浓度,通过改变进水中化学需氧量(chemical oxygen demand,COD)与总氮(total nitrogen,TN)的比值,研究了沼液中的亚硝态氮及硝态氮的保留情况,为螺旋藻生长提供氮源.通过对比螺旋藻在不同工况出水中的生长情况,以及氮元素的保留情况,筛选出最佳SBR工况.摇瓶试验结果表明,当进水COD/TN=3.0,出水中氨氮、硝态氮、亚硝态氮浓度分别为51.2、91.6、213.1 mg·L~(-1),此时螺旋藻具有较快生长速率,产率达到0.084 g·(L·d)~(-1).在此基础之上,通过放大螺旋藻培养规模至120L,研究了螺旋藻在室外大棚中的生长情况及螺旋藻对沼液中氮、磷元素的去除,结果表明螺旋藻在室外依然生长良好,培养10 d后,产率为(0.075±0.003)g·(L·d)~(-1),螺旋藻蛋白含量达到60%左右,养殖出水中氨氮去除率达到99%.
[Abstract]:Pig biogas liquid nitrogen and phosphorus rich in nutrients can be used as a cheap spirulina medium but its composition is complex. In particular, high ammonia nitrogen and other factors seriously inhibited the growth of spirulina. Sequencing batch reactor was used in sequencing batch bioreactor. SBR) reduced the concentration of ammonia nitrogen in the biogas liquid by changing the chemical oxygen demand (COD) in the influent and chemical oxygen demand. The ratio of COD) to total nitrogen nitrogenin (TNN) was used to study the retention of nitrite nitrogen and nitrate nitrogen in the biogas liquid. To provide nitrogen source for the growth of Spirulina. By comparing the growth of spirulina in the effluent under different conditions and the retention of nitrogen elements, the optimal condition of SBR was selected. The results of shaking flask test showed that. When COD / TNN was 3.0, the concentration of ammonia nitrogen, nitrate nitrogen and nitrite nitrogen in effluent were 51.2 ~ 91.6N ~ 213.1 mg 路L ~ (-1) respectively. The growth rate of spirulina was relatively fast, and the yield reached 0.084 g 路L 路d ~ (-1). On this basis, the culture scale of Spirulina was enlarged to 120L. The growth of spirulina in outdoor greenhouse and the removal of nitrogen and phosphorus from biogas by spirulina were studied. The results showed that spirulina was still growing well outside and cultured for 10 days. The yield was 0. 075 卤0. 003 g 路L 路dl-1, the protein content of Spirulina was about 60%, and the removal rate of ammonia nitrogen in the effluent was 99%.
【作者单位】：常州大学环境与安全工程学院;浙江清华长三角研究院生态环境研究所浙江省水质科学与技术重点实验室;清华大学环境学院;
【基金】：浙江省重大科技专项重点社会发展项目(2014C03022) 江苏重点研发项目(BE2015670)
【分类号】：S968.49;X713
【正文快照】： 我国规模化养猪产业不断发展,由此产生大量且集中的粪尿和废水难以完全自然消纳,对周边环境与人体健康造成威胁[1].虽然我国规模化养猪场绝大多数配备了沼气池对养猪废水进行厌氧处理,但是养猪沼液中仍然存在大量的有机物和氮、磷等营养元素.目前已有不少针对沼液的处理技术与

【相似文献】