NITROGEN SEQUESTRATION DURING SEWAGE SLUDGE COMPOSTING AND VERMICOMPOSTING

IF 1 4区 环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES
A. Zigmontienė, V. Šerevičienė
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引用次数: 0

Abstract

Composting is the oldest and most natural form of organic material recycling. Technological parameters are very important because when the process is unbalanced, other gases are produced, some of which have objectionable odours (NH3). Sewage sludge is a valuable material that has accumulated large amounts of nitrogen and phosphorus, which can contribute to improving soil quality. Optimal composting and vermicomposting conditions (C/N ratio, pH, and moisture) can reduce the emissions of gaseous pollutants in the environment. Experimental studies have shown that the volume of ammonia emitted into the environment during vermicomposting of sewage sludge is significantly lower (3 mg/m3 concentration was reached on the 28th day) than that resulting from traditional composting (3 mg/m3 concentration was reached on the 56th day). Vermicomposting of sewage sludge preserves higher amounts of total nitrogen (12.52 mg/kg) compared to traditional composting (10.35 mg/kg).
污泥堆肥和蚯蚓堆肥过程中的氮封存
堆肥是最古老和最自然的有机材料回收形式。工艺参数非常重要,因为当工艺不平衡时,会产生其他气体,其中一些具有令人反感的气味(NH3)。污泥是一种宝贵的物质,积累了大量的氮和磷,有助于改善土壤质量。最佳的堆肥和蚯蚓堆肥条件(C/N比、pH值和湿度)可以减少环境中气体污染物的排放。实验研究表明,污泥蚯蚓堆肥过程中排放到环境中的氨的体积(第28天达到3mg/m3浓度)明显低于传统堆肥过程中的氨体积(第56天达到3m/m3浓度)。与传统堆肥(10.35 mg/kg)相比,污泥的蚯蚓堆肥可保留更高量的总氮(12.52 mg/kg)。
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来源期刊
CiteScore
1.90
自引率
7.70%
发文量
41
审稿时长
>12 weeks
期刊介绍: The Journal of Environmental Engineering and Landscape Management publishes original research about the environment with emphasis on sustainability.
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