蚯蚓消解后污泥的性质变化及对彩叶草生长的影响

doi:10.11934/j.issn.1673-4831.2016.01.021

生态与农村环境学报 ›› 2016, Vol. 32 ›› Issue (1): 126-132.doi: 10.11934/j.issn.1673-4831.2016.01.021

蚯蚓消解后污泥的性质变化及对彩叶草生长的影响

霍庆霖, 徐小逊, 张世熔, 邓倩西, 张驰强, 邓玉兰, 董袁媛

四川农业大学环境学院, 四川成都 611130

收稿日期:2015-08-14 出版日期:2016-01-25 发布日期:2016-01-27
通讯作者: 徐小逊,通信作者E-mail:xuxiaoxun2013@163.com E-mail:xuxiaoxun2013@163.com
作者简介:霍庆霖(1992-),女,四川成都人,硕士生,主要从事废弃物资源化利用方面的研究。E-mail:372419049@qq.com
基金资助:
国家科技支撑计划(2012BAD14B00)

Properties of Earthworm Digested Sewage Sludge and Effects of the Sludge on Growth of Coleus blumei

HUO Qing-lin, XU Xiao-xun, ZHANG Shi-rong, DENG Qian-xi, ZHANG Chi-qiang, DENG Yu-lan, DONG Yuan-yuan

College of Environmental Sciences, Sichuan Agricultural University, Chendu 611130, China

Received:2015-08-14 Online:2016-01-25 Published:2016-01-27

摘要/Abstract

摘要：

以太平1号蚯蚓(Pheretima)消解生活污泥,并将消解后污泥与土壤按不同比例混合作为彩叶草(Coleus blumei)基质进行盆栽试验,研究了经蚯蚓消解前后污泥理化性质变化及蚯蚓消解后污泥不同配比基质对彩叶草生长的影响。结果表明,经蚯蚓消解后的污泥pH值、含水量、全氮、全磷、碱解氮、速效磷、速效钾和有机质含量降低,污泥的湿容重下降38.89%,通气孔隙度升高93.91%,其作为栽培基质的性质得到改善。蚯蚓对污泥中重金属有一定的生物富集作用,消解后污泥中Pb、As、Hg和Zn含量下降,Cu和Cd含量升高,但仍符合GB 4284-84《农用污泥中污染物控制标准》中的中性和碱性土壤标准。随着污泥添加量的上升,栽培基质酶活性显著升高,且植株生长形态和生理特性明显优于未消解污泥和对照(100%土壤),表明100%消解后污泥作为栽培基质有利于彩叶草生长。

关键词: 蚯蚓, 生活污泥, 彩叶草, 生长发育

Abstract:

A pot experiment was carried out using earthworm(Pheretima) digested sewage sludge as ingredient mixed with soil at different ratios to form culture medium for growth of Coleus blumei to explore changes in properties of the sewage sludge after digestion by earthworms and effect of the use of the earthworm digested sewage sludge at different rates on growth of C. blumei. Results show that pH, water content, total nitrogen, total phosphorus, alkalyzable N, readily available phosphorus, readily available potassium and organic matter were lower in the digested sludge than in untreated sludge, and wet bulk density of the digested sludge was 38.89% lower, while porosity was 93.91% higher, which indicates that earthworm digestion improves properties of the sludge as culture medium. Eearthworms may bio-accumulate heavy metals from sewage sludge. Digestion lowered the content of Pb, As, Hg and Zn, but raised that of Cu and Cd in the sludge, making it up to the criteria for neutral and alkaline soils of GB 4284-84"Standards for Control of Pollutants in Sludge for Agricultural Use". In the culture medium soil enzyme activity increased with rising rate of digested sludge used, and moreover, the plants growing in the medium mixed with digested sludge are much better than those growing in untreated sludge and in CK(100% soil) in growth morphology and physiological property, which indicates that 100% earthworm digested sludge can be used as very good medium for cultivation of C. blumei.

Key words: earthworm, domestic sewage sludge, Coleus blumei, growth

中图分类号:

霍庆霖, 徐小逊, 张世熔, 邓倩西, 张驰强, 邓玉兰, 董袁媛. 蚯蚓消解后污泥的性质变化及对彩叶草生长的影响[J]. 生态与农村环境学报, 2016, 32(1): 126-132.

HUO Qing-lin, XU Xiao-xun, ZHANG Shi-rong, DENG Qian-xi, ZHANG Chi-qiang, DENG Yu-lan, DONG Yuan-yuan. Properties of Earthworm Digested Sewage Sludge and Effects of the Sludge on Growth of Coleus blumei[J]. Journal of Ecology and Rural Environment, 2016, 32(1): 126-132.

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蚯蚓消解后污泥的性质变化及对彩叶草生长的影响

Properties of Earthworm Digested Sewage Sludge and Effects of the Sludge on Growth of Coleus blumei

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