表面过滤技术及其在袋式除尘器上的应用

本文介绍了一种新型的过滤技术(表面过滤技术)在袋式除尘器中的应用及其特点,该技术的采用可减少除尘器的压力损失,提高滤袋的使用寿命和除尘效率.     

烟气对人体的危害及研究

丙纶强力丝在加工过程中，聚丙烯在高温下发生分解，产生有害烟气，造成操作环境污染，危害人体健康．采用提高抽风机位置，加大排风量，改进风机换气次数等措施，除烟率达85％以上．     

依兰县绿色食品发展现状与对策初探

针对依兰县绿色食品种植面积,种植基地建设,养殖基地建设,山产品采集基地建设,加工基地建设和销售基地建设及经济效益情况,提出了目前依兰县绿色食品开发已初步形成的标准体系框架并进行论述,评价分析了依兰县绿色食品产业的有利条件和制约困素,并提出发展的对策,使之逐步走向依兰县农业经济的主导地位.     

医院传染病污水处理技术探讨

以杭州市第六人民医院的污水处理设施为例，阐述了医院传染病污水处理技术的基本思路，并进而探讨了其消毒参数选择和处理的经济性，总结了还存在的问题及解决途径。     

半干法喷射烟气脱硫试验研究

介绍了半干法喷射烟气脱硫试验 ,研究了钙硫比、雾化水量、进口SO2 浓度、湿度等主要因素对脱硫率的影响规律 ,对布袋除尘器的辅助脱硫也进行了研究。结果将有助于改进半干法脱硫技术 ,并为进一步的工业应用提供了参考数据。     

The influence of source and timing of nitrogen fertilizers on yield and nitrogen use efficiency of four sweet potato cultivars

Nitrogen (N) availability is a very important determinant of crop yield. It is also one of the most expensive inputs in crop production. Thus, the efficient management of N by farmers with limited resource is a very important part of successful soil and crop management system. A field study was conducted on a Norfolk sandy loam soil at the George Washington Carver Agricultural Experiment Station, Tuskegee, AL, to evaluate the influence of fertilizer source and timing on the yield of four sweet potato [Ipomoea batatas (L.)] cultivars. Two N sources (urea, CO(NH₂)₂ and ammonium nitrate, NH₄NO₃), four sweet potato cultivars (‘Georgia Jet’, GA-Jet; ‘TU-82-155’, TU-155; ‘TU-1892’; and ‘Rojo Blanco’, Rojo-Bl) and three times (zero, single, and split applications) were used in a factorial designed experiment. Plants were harvested after 80 and 120 days and total and marketable yields determined. Nitrogen recovery efficiency, yield efficiency and physiological efficiency were also determined. Total and marketable yields of early maturing cultivars were significantly higher than of late maturing cultivars (P<0.05). The single application of N resulted in significantly higher yield in storage roots than split application (P<0.05). Physiological efficiency values were highly correlated with total marketable yields. Recovery rates increased with time. Late maturing cultivars tended to have higher N recovery and physiological efficiency than early maturing cultivars. These results suggest that cultivar maturity group should play an important part in N fertilization recommendations for sweet potato.     

锌镉还原法的海水硝酸盐浓度

按照《海洋调查规范》(1991)中锌镉还原法 ,用三对基体来配制NO3 -标准溶液 :NaCl水 (31gNaCl加纯水至 1L)与无氮东海海水ECS、《海洋调查规范》(1991)人工海水SAS(NaCl水加MgSO4)与ECS和Strick land Parsons(1972 )人工海水SP72 (SAS加NaHCO3 )与ECS。经测定 ,且忽略标准曲线方程的截距 ,纯水与ECS的NO3 -还原率比为 0 .2 6 6 ,NaCl水与ECS的比为 0 .70 6 ,SAS与ECS的比为 0 .90 1,而SP72与ECS的比则为1.0 0 9。显然 ,用ECS和等价的SP72定出的值最接近天然海水中NO3 -的浓度。由《海洋调查规范》(1991)SAS定出的浓度须乘上 0 .90 1～ 0 .95 6后才接近海水中NO3 -浓度。     

降低污水处理成本 迎接入世挑战

本文从污水处理工艺的选择、设备比选，占地，能耗等诸多方面介绍了在设计中如何减少投资，降低污水处理成本的经验与体会，并提出了可行的方法与建议。     

印染废水处理技术现状及其进展

印染废水是一种水质水量变化大、有机物含量高，可生化性差，COD高，色度高的难降解废水。系统地介绍了印染废水处理的应用现状及技术进展，对处理印染废水的化学法、物理法以及生物处理技术进行了综述。     

射阳纸浆厂废水生态工程处理的可行性分析

介绍了拟建的射阳纸浆厂的废水处理工艺；并对选用的生态工程结构、工艺条件、功能和经济与生态效益进行了分析；给出了结论和建议．