柴油发电机房噪声治理的优化设计及应用

目前柴油发电机房噪声的设计与治理方法没有形成固定的模式,为了解决这个问题,文章以某柴油发电机房噪声治理为例,对该噪声控制进行理论探讨、设计计算和技术优化。以此为据完成了工程,取得了良好的处理效果。并为柴油发电机房噪声控制提供了一种可供参考的方法。     

肥料配施对土壤蓄水抗旱性能的影响

田间和室内施肥实验观测结果表明,有机肥和氮素化肥配合施用可以显著提高土壤的持水容量,并有效地抑制裸土蒸发.连续4年适量的稻草和化肥氮素配施与单施化肥相比,粘盘黄褐土的田间持水量增加20%左右,作物初萎土壤含水量有所降低,因而有效水储量增加;裸土蒸发过程中,在0～8×104Pa吸力范围内,随着土壤含水量降低,施有机肥的土壤吸力陡增,失去单位数量的水需要做更多的功,因而蒸发强度减弱,15d累积蒸发量比单施化肥的土壤减少26%.秸杆与化学氮肥配合施用,可以明显增强土壤的蓄水抗旱机制.     

Identification of barley genotypes with low grain Cd accumulation and its interaction with four microelements

The variation in grain cadmium (Cd) concentrations was evaluated among 600 barley genotypes grown in the same field condition to select low Cd accumulating genotypes. The results showed that there is considerable genotypic variation in grain Cd concentrations in barley grain samples, with the mean concentration of 0.16 mg kg(-1) DW and the variation of 0 (not detected) to 1.21 mg kg(-1) DW, and 47.2% of the grain samples exceeded the maximum permissible concentration (MPC) for Cd in cereal grains. In addition, differences between genotypes over the two years were fairly consistent, and Beitalys and Shang 98-128 showed the lowest grain Cd concentration, being 97.5% lower than that in the two highest Cd accumulators E-barley 6 and Zhenong 8 in the second harvest year. The great genotypic differences in Cd concentrations indicated that it is possible to lower Cd content of barley through cultivar selection and breeding for use at sites where Cd concentration in grain exceeds the MPC. Significant genotypic difference was also found in microelement concentrations. Correlation analysis showed that only Mn accumulation is synergetic with Cd accumulation, despite slightly positive relationship between Cd and Zn, Cu, or Fe in accumulation in barley grains.     

一株苯酚厌氧降解菌的选育及其降解苯酚的研究

从厌氧驯化的活性污泥中筛选到一株高活力苯酚降解菌,鉴定为白假丝酵母(Candida albicans),命名为PDY-07。该菌株能以苯酚为唯一碳源和能源。菌株PDY-07降解苯酚的最佳温度为35℃;pH值范围为6.9～7.1;菌株PDY-07耐受苯酚的能力可以达到2600mg/L。     

用于高校优质中水原位处理的设备研究

为了提高高校优质中水的处理与回用率,提出了适用于高校优质中水的处理与回用系统,设计了中水原位处理设备,并进行了试验验证.结果表明,沉淀-SOBMR-过滤设备能够实现无动力、自动化运行,尤其适合于盥洗和洗浴废水的处理.沉淀单元对盥洗废水COD和SS去除率分别为23.8%和55.7%;SOBMR单元对盥洗废水COD和SS去除率分别为35.8%和27.9%;过滤单元能有效去除废水中绝大部分SS,且能耐受SS冲击负荷,对废水COD去除率先增后降,受水力负荷的影响,负荷越小,处理效果越好.整个系统出水水质满足杂用水对COD、SS和色度等要求,可用于冲厕和杂用.每套处理装置可节约水资源151.2 m3/a,设备投资回收期为2.01年,具有巨大的经济效益.     

Technology-side carbon abatement cost curves for China’s power generation sector

China is among the largest emitters of carbon dioxide (CO₂), worldwide Thus, its emissions mitigation is of global concern. The power generation sector is responsible for nearly half of China’s total CO₂ emissions and plays a key role in emissions mitigation. This study is an integrated evaluation of abatement technologies, including both low-carbon power generation technologies and retrofitting options for coal power plants. We draw marginal abatement cost curves for these technologies using the conservation supply curve method. Using scenario analysis for the years 2015 to 2030, we discuss the potential performance of abatement technologies. Marginal costs for the analyzed abatement technologies range from RMB ? 357.41/ton CO₂ to RMB 927.95/ton CO₂. Furthermore, their cumulative mitigation potential relative to the baseline scenario could reach 35 billion tons of CO₂ in 2015–2030, with low-carbon power generation technologies and coal power abatement technologies contributing 55% and 45% of the total mitigation, respectively. Our case study of China demonstrates the power generation sector’s great potential to mitigate global emissions, and we suggest nuclear power, hydropower, and the comprehensive retrofitting of coal power as key technology options for the low-carbon transition of the energy system and long-term emissions mitigation strategies.

     

石油化工行业发展规划环境影响评价技术要求浅论

行业规划环境影响评价工作目前处于试点阶段,技术要求还在探索中。为推动与规范石油化工行业规划环境影响评价工作,作者从规划环境影响评价目的着手,尝试性地论述了石油化工行业发展规划环境影响评价的基本技术要求,内容包括工作重点、指导思想和工作原则,以及环境影响报告书应包括的主要章节等。     

CNG汽车加气站火灾爆炸危险分析与预防

对压缩天然气（CNG）汽车加气站的危险因素进行了辨识，并且用事故树法对加气站的火灾爆炸危险进行了分析，从技术、教育、管理3个方面提出了预防控制措施。     

企业应该承担社会责任

近几年来，接连发生的安徽阜阳奶粉、湖南岳阳砷污染、松花江和江苏太湖水污染以及各种矿难和假冒伪劣安全帽等事件，引发了人们对企业承担“社会责任”的思考。社会责任成为国人关注的热点问题。