城市污泥-猪粪混合堆肥过程中湿度的层次效应及其动态变化  

The Stratification of Moisture Content and Its Dynamics in Co-composting of Sewage Sludge and Pig Manure

作　　者：罗维[1] 陈同斌[1] 高定[1] 郑玉琪[1] 郑国砥[1] 

机构地区：[1]中国科学院地理科学与资源研究所环境修复室,北京100101

出　　处：《环境科学》2004年第2期140-144,共5页Environmental Science

基　　金：北京市重点农业科技推广示范项目;科技部"农业科技成果转化资金"项目;中科博联环保高新技术有限责任公司资助项目

摘　　要：由城市污泥、猪粪混合堆肥试验表明 :升温期堆体各剖面的湿度在 5 0 82 %～ 6 0 87%之间 ,高温期在 38 7%～ 5 2 17%之间 ;升温期和高温期堆体中湿度的层次效应不明显 ,堆肥仓门、仓内壁以及堆体深度对湿度层次效应的影响较小 ;降温期堆体各剖面的湿度在 2 4 5 4 %～ 4 9 39%之间 ,湿度层次效应非常明显 ,仓门、仓内壁和堆体深度对湿度层次效应产生明显影响 ;后熟期堆体各剖面的湿度在 19 18%～ 4 9 34%之间 ,湿度层次效应相对减弱 ,仓门和仓内壁是导致湿度层次效应减弱的重要原因 .不同堆肥期堆体剖面的湿度差异由大到小为 :后熟期 >降温期 >高温期 =升温期 ,堆体的湿度由大到小为 :下部 >中部>上部 .堆肥过程中湿度随时间的变化满足二级动力学方程 .The experiment of co composting of sewage sludge and pig manure was studied. The moisture contents were 50 82%～60 87% at the stage of temperature rising and 38 7%～52 17% at the stage of thermophilic fermentation, and the stratification of moisture content were not obvious for both stages because the door, the internal wall and the depth of the composting bay had little effect on the stratification. At the stage of cooling, the moisture content was 24 54%～49 39%, and the stratification of moisture content was remarkable as the door, the internal wall and the depth of the composting bay had great influence on it. At the stage of maturity, the moisture content was 19 18%～49 34%, and the stratification of moisture weakened, for which the door and the internal wall were mainly responsible. At the different composting stage, the degree of difference of moisture content on the profiles of the pile was of the order: maturity stage>cooling stage>thermophilic stage=temperature rising stage, and the moisture content in the pile was as follows: the lower>the middle>the upper. The relation between moisture content and composting time meeted with two order kinetics equation.

关 键 词：城市污泥 猪粪 混合堆肥 湿度 层次效应 

分 类 号：X705[环境科学与工程—环境工程]