低热值燃料利用中的环境经济效益分析

本文通过对低热值燃料的性质及燃烧后的热量利用进行了分析论述，并对矸石电厂建成运行中产生的环境经济效益和综合效益作了系统的分析和评述。     

20 MW水泥窑纯低温余热发电工程设计介绍

利用生产过程中产生的废气余热发电,是水泥生产企业发展循环经济的一种选择模式.介绍了江苏恒来建材股份有限公司水泥窑配套20 MW纯低温余热发电工程的设计方案、工艺流程和设备选型.该工程正常运行后的效益分析表明纯低温余热发电装置目前在我国水泥企业具有广阔的推广应用前景.     

美国：燃煤发电又受青睐

近两年来燃煤发电在美国发电业内大举回潮日益受到人们的关注，估计在可预见的时期内，燃煤发电不但将很快遏制住其长期以来的颓势，而且可能成为所有发电种类中的佼佼者。     

从汽柴油标准发展看清洁生产

通过分析目前国内外汽油、柴油标准发展情况，提出清洁工艺方案建议     

印度对垃圾的处理办法

印度独立50多年来,政府实施了一系列经济发展计划,旨在迅速发展国民经济和扩大农业、工业、运输以及其它基础设施,从而增加生产和就业,减少贫穷、缩小差距,建立一个平等公正和富强繁荣社会.为了增加农业生产和农业中的就业机会,印度的各个五年计划都努力扩大耕地面积,推广使用新技术,如扩大灌溉面积,不断增施化肥、农药和杂交种子.工业领域中,既建立了新产业,也扩大了原有产业,并正在不断提高技术水平.在发展工农业的同时,各种基础设施,如能源、交通、运输、通讯、银行,虽然在各方面都取得了长足的进步,但生态环境的不断恶化也是不容否定的事实.环境问题所造成的经济损失仅1995年就高达97亿美元,占当年国内生产总值的4.5%.     

Response of antioxidase in viscera of Pagrosuma major larvae to water soluble fraction of hydrocarbons in No.0 diesel oil

Pagrosomus major larvae were to the water-soluble fraction of hydrocarbon in No.0 diesel oil(corresponding to No.2 fuel oil) at concentration of 0,0.17,1.22 and 8.82mg/L for up to 15 days.Larvae were sampled on days 9 and 15 of the experiment.Supernatants of viscera tissue extractions were assayed for biochemical response in terms of oxidative stress-superoxide dismutase(SOD),activity of selenium-dependant glutathione peroxidase(Se-GPx) and catalase(Ca),and the concentration of reduced glutathione(CSH).On day 9 of exposure ,statistically significant dose-related increases in Se-GPx and SOD activity,and GSH concentration were observed in all cases except for Se-GPx activity under the highest dosage of hydrocarbon.However,on day 15 of exposure, a similar dose-related in all cases except for Se-GPx activity under the highest dosage of hydrocarbon.However,on day 15 of exposure, a similar dose-related response was only observed for Se-GPx activity.GSH concentration decreased and SOD activity showed no statistical difference as compared to controls.However, a significant decrease in compared to day 9 Se-GPx activity and GSH concentration, in contrast to increase SOD activity at day 15 as indicates an accelerated accumulation of H2O2 and potential oxidative damage under long term exposure of larvae to hydrocarbons.No statistical changes were observed in Ca activity throughout the experiment, possibly owing to the high efficiency of Se-GPx.A recovery experiment was performed on indicating that the response of antioxidants measured tending to returm to return to their control levels.These results prove the function of the antioxidant defense system of the larvae to the water-soluble fraction of hydrocarbons in No.0 diesel oil.