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为实现污水厂污泥的有效处理处置,阐述了近年来污泥处理处置的一些方法,分析了国外污泥处理处置常用技术,探讨了我国污泥处理处置现状及问题,为今后污泥资源化处理处置利用提供参考。 相似文献
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污水处理厂污泥的处理和处置主要有减量化、稳定化、资源化方法.对于污泥的处理处置,通常采用的方法有污泥填埋、污泥焚烧、建材利用及海洋倾倒,但是污泥的农用则是最具前途的资源化途径.首先介绍污泥的肥效及其农用资源化的经济效益,然后谈谈污泥农用中应该注意的问题,最后简要介绍高温好氧堆肥的技术. 相似文献
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我国城镇污水处理厂污泥农用的发展潜力分析 总被引:1,自引:0,他引:1
指出了目前城镇污水处理厂大部分污泥未能得到妥善的处理处置是我国城镇地区的主要环境问题之一。土地利用、陆地填埋和焚烧等是当今世界广泛采用的污泥处理处置方法。通过对比这些方法,并结合我国的现状,对污泥土地利用,尤其是农业利用的发展潜力进行了分析。通过分析我国污泥中的营养成分及其对土壤理化性质的影响、重金属成分及其变化趋势和病原体及其影响可知,对于我国这样一个发展中的农业大国而言,在未来的很长一段时期内,土地利用尤其是农业利用,将是我国城镇污泥处理处置的最主要方式。提出了为保障污泥土地利用生态安全性,并更好地满足污泥农用的要求,应合理地选择污泥处理处置技术,只有这样,才能更好地实现污泥的减量化、稳定化、无害化和资源化处置目标。 相似文献
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指出了剩余污泥既是一种生物质原料,可以被有效地资源化和能源化,同时又含有大量有毒有害物质,如何妥善地处理处置污水污泥,已成为全社会关注的课题,阐述了几种常见的污泥处理处置方法,并分析了各种方法的优缺点,探讨了污水处理厂剩余污泥处理处置的发展方向。 相似文献
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指出了随着村镇城市化发展提速,污水处理厂运行负荷加大,市政污泥的产出量也随之上涨。市政污泥是一类由复杂的有机混合物、微生物、无机物和水分组成的非均相絮状物,其成分复杂,理化性质独特,有毒有害物质多,彻底无害化处置极其困难。传统填埋、焚烧、堆肥技术虽能减量化处置市政污泥,但处置效果一般,资源化程度较低。基于此,提出了水泥窑协同处置市政污泥技术,可同步实现水泥熟料生产和市政污泥的无害化、资源化处理,结果表明:该技术处理效果稳定,处置费用经济,具有可持续发展性。 相似文献
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由于城市污水处理厂在污水处置过程中产生污泥,污泥中存在有机物、重金属等超标污染物,如不能有效处理将对水源、空气和土壤环境造成污染,以苏州某污水处理厂存量污泥处置项目为研究对象,结合项目实施阐述了环境监理在污泥处置施工阶段的工作程序、二次污染防治、控制要点等内容,对处置过程中污泥开挖、固化稳定化、阻隔填埋等监理过程中控制难点和问题进行了探讨,提出了相应的建议,以期为后续污泥处置项目在施工阶段的环境监理提供参考。 相似文献
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城市污水处理厂能耗分析及节能措施 总被引:1,自引:0,他引:1
指出了城市污水处理是高能耗产业之一,其中污水提升、曝气系统和污泥处理是主要能耗源。通过分析污水处理过程中的能耗构成,指出了各阶段的节能降耗途径,并提出了污水处理厂节能管理机制。 相似文献
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指出了随着当前造纸领域中水循环利用率不断提高,废水处理难度大、成本高及污泥处理困难,某大型造纸厂污水处理站仅采用预处理+EGSB+A/O的工艺方案处理该厂生产废水。经处理后出水CODcr、色度、BOD5、氨氮、总氮及总磷等指标均达到《制浆造纸工业水污染物排放标准》(GB3544-2008)表2规定的新建企业水污染物排放限值要求,同时达到表3水污染物特别排放限值的要求,水处理成本仅为127元/t,污泥处置方便,且有一定经济效益,对于我国造纸污水的处理具有较高的应用推广价值。 相似文献
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施用污泥堆肥对旱荷花生长和土壤环境的影响 总被引:2,自引:0,他引:2
以金华市某污水处理厂污泥为研究对象,研究污泥堆肥对旱荷花生长及土壤环境影响。结果表明,污泥土地利用提高了土壤中N、P及有机质含量,土壤理化性质有明显改善,但同时也增加了土壤中Cd元素的含量,不同处理土壤Cd含量比对照增加了12.95%.154.48%,土壤Pb、Cu、Zn含量变化甚微;长期施用该污泥堆肥,不会造成Pb、Cu、Zn对园林植物的毒害。且污泥堆肥不同处理的效果不同,污泥堆肥70%+园土20%+炉渣10%的处理4,旱荷花的开花时间提前,花期延长,开花量增加,施用效果最好。 相似文献
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Pilar Mañas Elena Castro Pau Vila Jorge de las Heras 《European Journal of Forest Research》2010,129(4):521-530
Peat moss is gradually being replaced by other materials as a growing medium in forest nurseries due to economic and ecological
constraints. In this study, six different mixtures were tested, mixing peat moss (P) and pine bark (B) with digested sewage
sludge (S) activated sewage sludge (A) and paper mill sludge (M), as growing media for Pinus halepensis seedlings; three different waste doses were applied. Seed germination percentage, seedling growth and foliar nutrient content
after 1 year in a greenhouse and percentage survival after transplanting were recorded. The influence of base substrate (P
or B) on germination percentage changed in different ways according the type of waste. The order of the different applied
mixtures by suitability (germination rate and seedling growth) from best to worst was as follows: activated sludge with peat,
activated sludge with pine bark, sewage sludge with peat, sewage sludge with pine bark, paper mill sludge with pine bark and
finally paper mill sludge with peat. 相似文献
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污泥堆肥对早熟禾生长及光合特征的影响 总被引:1,自引:0,他引:1
设置不同污泥堆肥施用水平(2%、4%、6%、8%、10%),研究了不同施用量对早熟禾生长指标及光合特征的影响。结果表明:不同水平的污泥堆肥施用量对早熟禾株高、叶面积、生物量、叶绿素含量均有一定的促进作用,以污泥堆肥施用量为8%时效果最好;对早熟禾光合作用效率促进效果最好的也是8%的处理;对早熟禾蒸腾作用促进效果最好的是6%的处理;对早熟禾水分利用效率促进效果最好的是10%的处理。 相似文献
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The adequate use of sewage sludge in silvopastoral systems could enhance positive relationships between pasture and trees
to increase farm incomes at medium, short and long term. The main aspects related to adequate sewage sludge use as a fertiliser
are dose and timing of application, once heavy metal concentrations have been taken into account. This paper aims to evaluate
the date and dose of sewage sludge applications on soil (KCl pH, soil organic matter), pasture production and tree growth
after the establishment of a silvopastoral system with Pinus radiata D. Don developed on sandy soils with an initial pH of 5. It is concluded that the contribution of sewage sludge does not
modify the soil conditions in a consistent manner, but cause detectable edaphic improvements depending on the climatic conditions,
the results of which are manifested in enhancement of pasture and trees. The application of high doses of sewage sludge is
the best option within those studied, as tree growth and pasture production tend to be increased. There are no clear effects
with regard to the date of application, but if the desire is to increase pasture production during the spring season, the
sewage sludge will be applied in the first of the application dates, whereas the greatest growth in the diameter of trees
is produced in the plots fertilised in February, although the date of application does not appear to have a clear effect on
their growth in height. 相似文献
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M. R. Mosquera-Losada R. Cuiña-Cotarelo A. Rigueiro-Rodríguez 《European Journal of Forest Research》2011,130(6):997-1008
Tree–understory competition is one of the most important aspects that control tree growth after reforestation. The relationship
between trees and the understory can be modified by improving acidic soils with lime and by fertilisation. This experiment
aims to evaluate the effect of soil improvements on the pasture–tree relationship by liming and fertilisation on different
dates in a Pinus radiata-reforested area. Both lime and sewage sludge improved soil fertility by increasing Ca and reducing Al in the soil. Initially,
tree development was reduced by lime, which improved the establishment of competitive grasses. Tree growth in limed treatments
did not initially respond to sludge inputs, likely because both tree and grass roots shared the same soil depth layer. Three
years after establishment, the use of high doses of sewage sludge in limed plots caused a growth rate similar to the best
treatments of unlimed plots, which grew with a poorly sown grass establishment. After 2 years of the experiment, the presence
of Erica woody shrub diminished tree development. High doses of sewage sludge with lime, as well as high doses of sewage sludge without
lime, applied in April and low doses of sewage sludge without lime added in early February improved tree growth. From a practical
point of view, lime and sewage sludge dose close to 100 kg total N ha−1 should be recommended if a silvopastoral system is established, as it enhances pasture production and tree growth. 相似文献
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