Toxic effects of wastewater from various phases of monosodium glutamate production on seed germination and root elongation of crops

To make a comprehensive assessment on monosodium glutamate (MSG) wastewater pollution, a pollution exposure experiment was carried out on the seed germination and root elongation of wheat, Chinese cabbage and tomato by using the wastewater discharged from different processing phases of MSG production. The results showed that there were significantly positive linear relationships between the inhibitory rates of wheat seed germination and root elongation and the COD_cr of the mother liquor scraps. The toxicity of MSG wastewater to the test crops was in the order of tomato > Chinese cabbage > wheat, indicating that tomato was the most sensitive to the wastewater, and could be considered as an ideal toxic bioindicator. The half-effect concentrations (IC₅₀) based on the seed germination and root elongation of the test crops exposed to the wastewater discharged from various processing phases of MSG production was 22.0–32 432 and 17.3–3320 mg/L, respectively. Translated from Chinese Journal of Applied Ecology, 2006, 17(7): 1286–1290 [译自: 应用生态学报]     

城市生活垃圾场处理技术模糊综合评价

通过对一个待建的城市生活垃圾场处理技术的综合分析，建立一个相对完整的指标体系，然后用模糊数学的方法，对指标体系进行量化、归一化，得到一个通用的评价模型，并运用此模型对该垃圾的垃圾处理方式进行评价，最后提出卫生填埋是当前较为合理的处理方式。     

不锈钢丝网填料存在时氮氧化物吸收过程的研究

在不锈钢丝网波纹填料柱中以水为吸收液,考察了气体空塔速度和氧化度对低浓度氮气化物(NO_x)吸收的影响。吸收率随氧化度的增高而增高,随空塔速度的增高而降低。并对比了聚丙烯丝网波纹填料柱吸收NO_x的效果。实验结果表明,在室温下不锈钢对NO_x的吸收未显示出催化活性。同时讨论比较了网波填料柱和降膜湿壁柱的吸收性能。 近年来用波纹填料或塑料针毡滤料消除尾气中NO_x和硝酸雾的方法,引起人们的注意。不过其净化机理还不十分清楚,Gilbert,W.J.等认为不锈钢丝网填料对NO有催化氧化的作用。为了弄清这一问题我们考察了不锈钢丝网和聚丙烯丝网填料柱中空塔速度和NO_x氧化度对NO_x吸收的影响,实验结果表明,在室温条件下不锈钢对NO_x的吸收未显示出催化活性。只是在空塔速度低或氧化度高的情况下,NO_x的吸收率才较高。同时对吸收特性进行了讨论。     

声波吹灰器在300MW发电机组的应用

华电潍坊发电有限公司通过不断探索改造,利用成熟技术,解决了原蒸汽吹灰系统长期投用的问题,并发挥了较好的吹灰效果.吹灰器改造后的试验报告,验证了投用波吹灰器对提高锅炉效率和锅炉安全性能有明显作用,在同类型机组上具有较强的推广意义.     

Fulvic acid removal by nanoparticle TiO2 using a submerged membrane photocatalysis reactor

The degradation of fulvic acid（FA） by nanoparticle TiO2 in a submerged membrane photocatalysis（SMPC） reactor was studied. In this reactor, photocatalytic oxidation and membrane separation co-occured. The continuous air supplier provided O2 for the photocatalytical reaction and mixed the solution through an airflow controller. The particle TiO2 could automatically settle due to gravity without particle agglomeration so it could be easily separated by microfiltration（MF） membrane. It was efficient to maintain high flux of membranes. The effects of operational parameters on the photocatalytic oxidation rate of FA were investigated. Results indicated that photocatalyst at 0.5 g/L and airflow at 0.06 m^3/h were the optimum condition for the removal of fulvic acid, the removal efficiency was higher in acid media than that in alkaline media. The effects of different filtration duration on permeate flux rate of MF with P25 powder and with nanoparticle TiO2 were compared. Experimental results indicated that the permeate flux rate of MF was improved and the membrane fouling phenomenon was reduced with the addition of nanoparticle TiO2 catalyst compared with conventional P25 powder. Therefore, this submerged membrane photocatalysis reactor can faciliate potential application of photocatalytic oxidation process in drinking water treatment.     

盘锦市近岸海域生物资源现状及几点建议

根据异养细菌丰度、浮游动物、浮游植物与底栖动物的生物量分布及种类组成等现场调查结果和近期海洋渔业生产资料，论述了盘锦市近岸海域生物资源现状。并根据该地区油气资源开发和海洋生物资源（尤其是经济贝类资源）保护的需要提出了几点建议。     

超深厌氧塘的技术特性

超深厌氧塘是一种稳定塘新工艺。与常规厌氧塘相比，具有ＢＯＤ５容积负荷大、占地面积小，受温度影响小的优点。探讨了它的工作机理，本研究确定了负荷、水深和去除率之间的定量关系以供实际应用。     

“华夏古陆”考异

自葛利普创名“华夏古陆”以来,经过半个多世纪的论辩与考订,对其地质构造属性,至今仍然否定与肯定交迭起伏,莫衷一是,本文从推覆构造,陆地漂移等实际资料着手,加以论证,认为它是经历深刻改造和发生巨大位移的变质岩断片体,地质构造属性已非“华夏古陆”原义。     

电极旋转放电条件下O3合成效率的理论研究

根据低温等离子体理论和电磁场理论，在实验的基础上研究了电极旋转条件下低温等离子体的产生机制和臭氧的合成机制，分析了放电过程中二次放电重叠对臭氧合成的影响，建立了旋转放电与二次放电的理论模型，并根据这一理论模型导出电极旋转条件下的臭氧合成效率与二次放电重叠概率以及电极旋转速度间的理论关系．这一理论结果表明：二次放电重叠使得臭氧合成效率降低，而电极以适当地速度旋转则可以有效地避免二次放电的重叠，从而提高臭氧的合成效率．理论值和实验结果能够较好地吻合．     

加强能力培养, 提高专业水平——论环境类中专的教学改革

介绍了环境保护中专办学２０年来所取得的成绩及其为环保事业的发展做出的积极贡献，并指出存在的问题．为适应环保事业发展的需要，对环保中专在专业设置、课程设置、教学计划和教材建设方面，均提出改革意见