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| 沸石添加剂对污泥堆肥过程中的氨挥发及相关因素的影响 |
| Effects of Zeolite Addition on Ammonia Volatilization and Influence Factors in Sludge Composting |
| 投稿时间：2014-10-23 |
| DOI：10.13254/j.jare.2014.0285 |
| 中文关键词: 沸石 污泥堆肥 氨挥发 相关因素 |
| 英文关键词: zeolite sludge composting ammonia volatilization influence factors |
| 基金项目:公益性行业(农业)科研专项(201303101-6,201303089-2) |
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| 中文摘要: |
| 以污泥和秸秆为基本堆肥原料,向其中添加不同比例的沸石(5%和10%),采用密闭室动态吸收法,分析了污泥堆肥过程中的氨挥发速率以及氨挥发的相关影响因素。结果表明:堆肥中添加5%和10%的沸石,与对照相比显著降低了氨挥发累积速率27.9%和48.7%,并且延迟1 d出现氨挥发峰值。沸石添加剂对氨挥发影响因素温度、pH 值、EC 和NH4+-N 均有显著影响,添加沸石缩短堆肥高温期3 d,降低堆肥中后期堆体温度(降幅为0.17~13.5 益),增加堆体0.09~0.22 个pH 单位,维持堆肥更低电导率(1 876.7~2 636.7 uS·cm-1),降低堆体NH4+-N 9.07%~22.2%。污泥堆肥中添加沸石降低了氨挥发累积速率,保留了堆体中的有效氮,在堆肥工程中具有较为广阔的应用前景。 |
| 英文摘要: |
| An experiment of sludge composting was conducted to study the effects of zeolite addition(occupying the wet weight of sludge and straw 5% and 10%)on ammonia volatilization and influence factors. Sludge and straw were raw materials. The results indicated that adding 5% and 10% zeolite to the sludge could significantly decrease the NH3 volatilization cumulative rate of 27.9% and 48.7%. The pH value of composting with zeolite addition increased 0.09~0.22 compared with the contrast. Electrical conductivity(EC)of composting with zeolite addition maintained lower level which were 1 876.7~2 636.7 uS·cm-1. Zeolite addition decreased the content of NH4+-N by 9.07%~22.2% when compared with the contrast. Zeolite as an additive in sludge composting could decrease the cumulative rate of ammonia volatilization. Thus, zeolite is a new potential additive which will bring prospects of application in sludge composting. |
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