渗滤液MBR-NF浓缩液回收含腐植酸水溶肥料对不同种子发芽及幼苗生长的影响.pdf

2015,34(3):424-430
农业环境科学学报
2015年3月
Journal o/agro-environment Science
渗滤液MBR-NF浓缩液回收含腐植酸水溶肥料
对不同种子发芽及幼苗生长的影响
辜龙香,许玉东
(福州大学环境与资源学院,福州350108)
摘要:采用水培条件下种子发芬试验方法,研究了所提取的含腐植酸水溶肥料对黄瓜、甘蓝、莴苣和黑麦草4种作物的种子萌发
及幼苗早期生长的影响。结果表明:未稀释或低倍数稀释的高浓度含腐植酸水溶肥料对所有4种供试作物种子的萌发均有抑制作
用,其中对莴苣种子的胁迫最为明显;而稀释倍数达到20倍以上的含腐植酸水溶肥料对发芽率则不再呈抑制作用。在作物幼苗生
长阶段,该含腐植酸水溶肥料对幼苗的长度和重量均表现出高浓度抑制和低浓度促进作用,其中高浓度含腐植酸水溶肥料对供试
作物根长的抑制程度高丁芬长,对幼苗生长的抑制作用大于发芽率;而对于不同供试作物的生长促进作用,低浓度含腐植酸水溶肥
料的最佳稀释倍数则有所不同(在10~25倍之间),在最佳稀释倍数下,含腐植酸水溶肥料对幼苗生长的促进作用顺序为黄瓜最大、
廿藤和莴苣次之、黑麦草最小。
关键词:滲滤液;腐植酸;水溶肥料;种子;发芽;幼苗生长
中图分类号:X705文献标志码:A文章编号:1672-2043(2015)03-0424-07doi:10.11654/aes.2015.03.003
Seed Germination and Seedling Growth as Influenced by Humic Substances-containing Water-soluble
Fertilizer Produced from Landfill Leachate-derived Concentrate Generated During Membrane Bio-reactor
Coupled with Nanofiltration Process
GU Long-xiang,XU Yu-don
(College of Environment and Resources, Fuzhou University, Fuzhou 350108, China)
Abstract: Research has showed that the concentrate generated during the process of treating landfill leachate by membrane bio-reactor
coupled with nanofiltration could be used to produce a humic substances-containing water-soluble fertilizer(HSWF). In this paper. a hy
croponic experiment was conducted to investigate the effects of HSWF on seed germination and seedling growth of cucumber, cabbage, let-
tuce and perennial ryegrass. Results show that ISWF at original or low ilution had significant inhibition effects on seed germination of all
erops Iested, with leuce being Ihe mosl sensitive. However, such inhibition disappeared when the fertilizer was diluted al more than 20
limes. The length and weight of all crops were inhibited by high cone nralions. bul enhaneed by low concentrations of HSWF. The fertilizer
showed greater inhibition to the root length than shoot length, as well as to seedling growth than seed germination. The optimum concentra
tions of the fertilizer for promoting crop growth ranged from 10 to 25 time dilution depending on crops. The promoting effect of the fertilizer
was cucumber>cabbage and lettuce>perennial ryegrass
Keywords: landfill leac hale: humic; walcr-soluble fertilizer; seed; germination seedling growth
垃圾渗滤液是一种高浓度难降解有机废水,其成物等有毒有害物质,此外还含有较高浓度的腐植酸及
分复杂,有机物、氨氮浓度高,含有重金属、微量有机丰富的植物生长所需的各利营养元素等物质。大量
工程实践表明,采用MBR-NF典型工艺处理渗滤液,
收稿日期:2014-10-31
其出水完全能够达到排放标准,但与此同时产生了
基金项目:福建省科技计别重点项日(20090024);福建省自然科学基
金项目(2012J01205
占原液体积1/4~16的MBR-NF截留液?,该截留液
作者简介:率龙香(1990-),女,福建泉州人,预士研究生,从事废水治具有高COD、高盐度、可生化性差、色度高等特点,
哩与资源化研究工作。ビ-mail:gdkl68@qgc0m
通信作者:许玉东E-mail:xuyd20086cfzu.ecdu.cn
目前工程上还没有经济适用的处理工艺。由于焫植酸