首页 | 简介 | 作者 | 编者 | 读者 | Ei(光盘版)收录本刊数据 | 网络预印版 | 点击排行前100篇 | English
陈浩天,张地方,张宝莉,李国学.园林废弃物不同处理方式的环境影响及其产物还田效应[J].农业工程学报,2018,34(21):239-244.DOI:10.11975/j.issn.1002-6819.2018.21.030
园林废弃物不同处理方式的环境影响及其产物还田效应
投稿时间:2018-03-22  修订日期:2018-06-21
中文关键词:  堆肥  环境影响  土壤  园林废弃物  生物炭  焚烧  还田效应
基金项目:国家重大科研专项 (2016YFD0800202)
作者单位
陈浩天 中国农业大学资源与环境学院北京 100193 
张地方 中国农业大学资源与环境学院北京 100193 
张宝莉 中国农业大学资源与环境学院北京 100193 
李国学 中国农业大学资源与环境学院北京 100193 
摘要点击次数: 147
全文下载次数: 118
中文摘要:针对城市园林废弃物数量日趋增多及资源化利用程度低的问题,该研究比较了园林废弃物在直接焚烧、好氧堆肥、热解碳化3种处理方式下的养分与碳素与氮磷钾损失、温室气体排放,以及相应产物还田对土壤物理化学性质的影响。结果表明,焚烧处理的有机碳损失率高达98.62%,分别比好氧堆肥、碳化处理高39.77%和41.64%;全氮损失率高达95.51%,显著高于好氧堆肥(22.72%)及碳化(36.65%)处理;3种处理全磷及全钾损失率的差异相对较小。焚烧处理的CO2排放量高达1271.62 g/kg,远高于好氧堆肥的210.71 g/kg,但两者CH4、N2O的排放量都相对很小。园林废弃物堆肥及碳化后还田均可促进土壤中小团聚体向大团聚体转化,提高土壤中毛管孔隙度和饱和导水率,并显著提高N、P、K含量;其中生物炭还田可显著提高土壤有机碳含量,好氧堆肥还田能降低土壤pH值。焚烧后的灰分还田除提高土壤P、K养分含量及大粒径团聚体外,其他效果不明显。综上所述,好氧堆肥和碳化是适用于城市园林废弃物处理的2种技术,研究结果可为城市园林废弃物资源优化处理利用提供参考。
Chen Haotian,Zhang Difang,Zhang Baoli,Li Guoxue※.Environmental impacts and returning effects of garden wastes under different disposal methods[J].Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE),2018,34(21):239-244.DOI:10.11975/j.issn.1002-6819.2018.21.030
Environmental impacts and returning effects of garden wastes under different disposal methods
Author NameAffiliation
Chen Haotian College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China 
Zhang Difang College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China 
Zhang Baoli College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China 
Li Guoxue※ College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China 
Key words:composting  environmental impacts  soils  garden waste  biochar  incineration  returning effect
Abstract: The rapid increases of the garden wastes and the related low resources use efficiency have been paid great attention. In order to reuse the garden wastes, the effects of three treatments on garden wastes was investigated. The garden wastes were treated by aerobic composting, pyrolysis and direct incineration. The carbon and nutrient losses, the greenhouse gas emissions, and the effects of corresponding products on the physical and chemical properties of soil were investigated. Incineration was carried out in a closed greenhouse. Muffle furnace under 400 ℃ was used to pyrolysis. Garden waste composting was performed for 29 days using a 60 L composting vessels. A pot-scale test with white clover was carried out to investigate the physical and chemical properties of soil under different treatments of garden wastes. The results showed that the organic carbon loss rate of the garden wastes was 98.62% under the incineration, which was 39.77% and 41.64% higher than that under the aerobic composting and pyrolysis, respectively. The total nitrogen loss rate of wastes was 95.51% under the incineration, which was higher than that under the aerobic composting (22.72%) and pyrolysis (36.65%) respectively. There were no significant differences for the total phosphorus and total potassium loss rates among the three garden wastes treatments. The CO2 emission of incineration was 1271.62 g/kg, which was much higher than that of the aerobic composting with the value of 210.71 g/kg, but both the CH4 and N2O emissions were relatively low under these two treatments. Generally, both the compost and biochar returning to soil significantly improved the structure of soil aggregates with diameter 0.25-0.053 mm and increased the content of N, P and K; which also improved water permeability. Both of them improved capillary porosity and saturated hydraulic conductivity of the soil, and the effect of compost was better than biochar. Further more, biochar significantly increased the content of soil organic carbon. Aerobic composting is an ideal way to improve soil porosity and decrease pH of the soil. However, the incineration ash return to the soil mainly improved the soil P, K nutrient contents and large particle size aggregates with diameter >0.053 mm, the other effects were not significant. In summary, pyrolysis and aerobic composting are suitable ways for the treatments of garden waste, which provides reference for the better utilization of the resources of the garden wastes.
查看全文   下载PDF阅读器

京ICP备06025802号-3

主办单位:中国农业工程学会 单位地址:北京朝阳区麦子店街41号

服务热线:010-59197076、59197077 传真: 邮编:100125 Email:tcsae@tcsae.org
本系统由北京勤云科技发展有限公司设计

京公网安备 11010502031390号