共查询到20条相似文献,搜索用时 49 毫秒
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含水率高是目前河道疏浚底泥资源化利用的最大瓶颈。该文以崇明岛老滧河疏浚底泥(底泥C)及赢东村东湖底泥(底泥Y)为研究对象,研究了3种絮凝剂对不同底泥的沉降和脱水效果,为两种不同底泥最佳絮凝剂的选择提供依据,同时,通过不同絮凝剂投加量、含水率、反应时间和搅拌强度的试验,为实际工程提供优化参数。结果表明:1#絮凝剂对底泥C的沉降效果最好,其投加量为2%(絮凝剂与底泥干重之比);3#絮凝剂对底泥Y的沉降效果最佳,其投加量为1%;底泥C和底泥Y的最适疏浚含水率分别为380.0%和305.0%,最适搅拌强度分别为80 rpm和40 rpm,最佳絮凝时间均为30 min。 相似文献
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该文在工程实践的基础上,通过实验分析探讨亲水污泥脱水的机理;讨论有机高分子絮凝剂及铁盐在绢纺污泥脱水中的作用机理。 相似文献
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为研究河湖底泥含水率、加药量和泥浆污泥比阻对河湖底泥脱水固化的影响,文章分别利用BP神经网络和符号回归方程方法,建立了泥浆含水率、加药量、泥浆污泥比阻表达的泥饼含水率之间的预测模型。结果发现:两种机器学习方法得到的预测模型相关性良好,均能够达到80%以上,基于4种常用的误差评价指标(MAE、MRE、MSE、RMSE)比较之下,BP神经网络预测结果准确度更优,误差均小于4%,且两种模型中输入参数中泥浆含水率、污泥比阻对最终泥饼含水率贡献程度相似且较大,占比均能够达到80%以上。研究建立的相关模型为河湖底泥机械脱水固化提供了可靠的预测和分析工具。 相似文献
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Separation of liquids from a fine particle suspension plays an important role in many industrial processes. In the last few years, a number of technologies have been developed for the separation of slurries with coarse particle suspensions and intermediate particle sizes. However, separation of fine particles from these suspensions can be difficult and prohibitively costly. Battelle has developed a solid-liquid separation technology that utilizes difference in electrokinetic/acoustic properties to enhance the conventional solid-liquid separation techniques such as vacuum filters and presses. The present paper describes the application of this electroacoustic dewatering technology to Hamburg dredged material. 相似文献
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Separation of liquids from a fine particle suspension plays an important role in many industrial processes. In the last few years, a number of technologies have been developed for the separation of slurries with coarse particle suspensions and intermediate particle sizes. However, separation of fine particles from these suspensions can be difficult and prohibitively costly. Battelle has developed a solid-liquid separation technology that utilizes difference in electrokinetic/acoustic properties to enhance the conventional solid-liquid separation techniques such as vacuum filters and presses. The present paper describes the application of this electroacoustic dewatering technology to Hamburg dredged material. 相似文献
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Abstract The changes of inner temperature and drying characteristics of rind, membrane, flesh and stone of Litchi were investigated under constant relative humidity of drying medium at different temperatures at atmospheric and decompression conditions. Results show that the membrane resists moisture from moving the flesh or stone to rind. Decompression drying is helpful to the moisture evaporation of the fruit; when the moisture content lowers to a certain critical point, the drying rate is higher than that of atmospheric drying. Drying curves are very different from those of seeds drying or particle drying. In the drying process, temperature of Litchi whole fruit rises quickly at the beginning to a maximum region, then falls to a minimum before rising again slowly. All the phenomena are due to the composite structure of Litchi. 相似文献
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EXPERIMENTAL RESEARCH ON DRYING CHARACTERISTICS OF LITCHI 总被引:1,自引:0,他引:1
The changes of inner temperature and drying characteristics of rind, membrane, flesh and stone of Litchi were investigated under constant relative humidity of drying medium at different temperatures at atmospheric and decompression conditions. Results show that the membrane resists moisture from moving the flesh or stone to rind. Decompression drying is helpful to the moisture evaporation of the fruit; when the moisture content lowers to a certain critical point, the drying rate is higher than that of atmospheric drying. Drying curves are very different from those of seeds drying or particle drying. In the drying process, temperature of Litchi whole fruit rises quickly at the beginning to a maximum region, then falls to a minimum before rising again slowly. All the phenomena are due to the composite structure of Litchi. 相似文献
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结合某玉米酒精厂现有循环活性污泥系统(CASS)的不足,提出了利用填料强化该工艺的污染物削减能力的方法,以正交试验的方法,研究了MLSS含量、曝气时间、填料投加量和DO含量4个运行参数对填料-CASS的影响。结果表明,4个因素对COD去除率影响主次顺序为DO的质量浓度>填料投加率>MLSS的质量浓度>曝气时间,优化参数组合为:MLSS的质量浓度4.6 g/L、填料投加率为30%、曝气时间6 h、DO的质量浓度6.5 mg/L,在此条件下,当进水COD和NH3-N的质量浓度分别为540.1~862.47 mg/L和17.61~31.76 mg/L时,出水COD为和NH3-N的质量浓度分别为62.87~90.76 mg/L和0.69~1.01 mg/L,均能满足GB 27631-2011的排放要求;平均去除率分别为89.21%和96.22%。 相似文献
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玻璃纤维增强聚合物筋压缩和剪切性能试验研究 总被引:3,自引:3,他引:0
本文制备了不同直径、不同肋间距以及不同表面形式的玻璃纤维增强聚合物(GFRP)筋.在此基础上,通过玻璃纤维增强聚合物筋的压缩性能和剪切性能试验,研究GFRP筋的破坏形态和机理.分析GFRP筋直径、肋间距、表面形式以及长细比对其抗压强度和剪切强度的影响.试验结果表明,直径的变化对GFRP筋的抗压强度和剪切强度均有一定影响,肋间距和长细比的影响则不明显. 相似文献