生活污水生物絮凝吸附强化一级处理的研究

提出一级污泥絮凝吸附－沉淀工艺，利用回流一级污泥的絮凝吸附作用强化一级沉淀处理。试验证明，处理未经沉淀的生活污水。当ＨＲＴ为１０５ｍｉｎ，絮凝池污泥浓度１￣２ｇ／Ｌ、污泥充氧时间１ｈ左右时，ＣＯＤ和ＳＳ的去除率分别为６０￣７０％和７０％左右。     

畜禽粪便污染及治理技术

文章阐述了畜牧业生产中畜禽粪便等废弃物造成的恶臭气体污染,有害病源微生物污染、抗菌素污染、重金属污染、氮磷污染等环境污染问题,并根据国内外研究与实践,对治理畜禽粪便所采取的低等动物法、干燥法、生物技术和生态工程学等技术方法,进行了综合介绍和评价。     

我国钢管工业的现状、问题与发展前景(下)

概要分析了当前我国无缝和焊接钢管生产发展状况,包括生产能力和消费情况;简要介绍了国内主要钢管生产厂家的生产、技术、装备以及油井管、高压锅炉管和核电用管等高端产品的开发情况。针对钢管行业所存在的短期行为、盲目发展、重复建设的严重现象以及一些企业产品结构不合理、质量差、能耗高,生产机制不完善,能源与环保管理水平低等方面有悖国家《钢铁产业发展政策》的问题,提出了相应的发展举措。     

5G通信用化工新材料国内外市场现状及未来发展重点分析

简述了5G通信行业替代4G通信行业新材料的变化.重点分析了5G通信用化工新材料性能要求及国内外市场情况.指出5G通信行业及衍生市场的发展,将为我国化工新材料带来巨大的发展机遇.     

矿冶废弃物填料对生活污水的吸附性能研究

填料是人工湿地的主要组成部分,通过实验研究了粉煤灰、钢渣、高铁尾矿、铁尾矿、铁屑五种产量较大的矿冶废弃物作为人工填料对生活污水中TP、TN及COD的吸附性能。结果显示,24h内五种填料对污染物的去除随投加量的增加而增大。五种填料对TP的吸附比较明显,其中粉煤灰和钢渣去除效率最高,10min内去除效率可达90%以上。同时发现五种填料对TN、COD的吸附效果不理想,在24h内TN和COD去除率最高的均为钢渣,分别为15.73%和12.38%。     

Thawing and freezing of selected meat products in household refrigerators

Recently, several manufacturers of domestic refrigerators have introduced models with “quick thaw” and “quick freeze” capabilities. In this study, the time required for freezing and thawing different meat products was determined for five different models of household refrigerators. Two refrigerators had “quick thaw” compartments and three refrigerators had “quick freeze” capabilities. It was found that some refrigerator models froze and thawed foods significantly faster than others (P<0.05). The refrigerators with the fastest freezing and thawing times were found to be those with “quick thaw” and “quick freeze” capabilities. Heat transfer coefficients ranged from 8 to 15 Wm⁻²K⁻¹ during freezing, and the overall heat transfer coefficients ranged from 5 to 7 Wm⁻² K⁻¹ during thawing. Mathematical predictions for freezing and thawing time in the refrigerators gave results similar to those obtained in experiments. With the results described, manufacturers can improve their design of refrigerators with quick thawing and freezing functions.     

提高日用瓷白度的途径

叙述了各种添加剂和盐酸溶液对日用瓷白度及其它性能的影响,确定了添加剂的使用数量和盐溶液的浓度。     

两种生产HDPE的催化剂应用对比分析

对比分析了国产BCH催化剂与国外同类催化剂的基本物性和工业应用等方面,指出了各自的优缺点,对国产BCH催化剂今后发展和工业应用有一定指导作用。     

Energy use in the rural areas of India: setting up a rural energy data base

Aggregating and forecasting demand are crucial parts of energy planning. While a large number of energy consumption surveys have been conducted in the past in the rural energy sector of India, the lack of sufficient data and its compilation, coupled with doubt about the quality of data, has made the task extremely difficult. This paper summarizes our recent effort to compile, computerize and analyze data from 638 village energy consumption surveys covering over 39,000 households, carried out by different organisations between 1985 and 1989. The details of the level of information provided in the survey reports, area of survey, land use pattern, asset ownership, etc., of the collated studies are presented. Results based on the analysis of the energy consumption data compiled are then discussed. The national average for rural domestic thermal energy consumption (excluding water and space heating) estimated through this work (629 kcal or 2.63 MJ per capita daily) is much similar to the rural domestic thermal energy requirement assumed in most energy planning exercises in India in the past. The useful thermal energy consumption varies from 325 to 1065 kcal/cap/d (1.36-4.46 MJ/cap/d) in the East Coast Plain and Hills and the Eastern Himalayan Regions, respectively. Reconfirming the predominance of firewood, the data reveals that the contribution of firewood to the domestic thermal energy consumption has remained at about 58% over the last three decades; dungcake and agricultural residues contribute almost equally in the remaining share. At the national level, our estimates indicate that at least 180 million tonnes of firewood, 40 million tonnes of dungcakes and 30 million tonnes of agricultural residues were consumed in the rural sector for meeting the domestic thermal energy requirement in 1991. The paper also compares the estimates with those based on other surveys in India.