Production of laccase by Coriolus versicolor and its application in decolorization of dyestuffs: (Ⅱ) Decolorization of dyes by laccase containing fermentation broth with or without self-immobilized mycelia

The capability of decolorization for commercial dyes by Coriolus versicolur fermentation broth containing laccase with or without immobilized mycelium was evaluated.With cell-free fermentation broth containing laccase,high decolorization ratio was achieved for acid orange 7,but not for the other dyes concerned.The immobilized mycelium was proved to be more efficient than the cell-free system.All the four dyestuffs studied were found being decolourized with certain extent by immobilized mycelium.The repeated-batch decolorization was carried out with satisfactory results.The experimental data showed that the continuous decolorization of wastewater from a printing and dyeing industry was possible by using self-immobilized C.Versicolor.     

Production of laccase by Coriolus versicolor and its application in decolorization of dyestuffs : (Ⅰ) Production of laccase by batch and repeated-batch processes

The production of laccase by Coriolus versicolor was studied.The effect of cultivation on laccase production by Coriolus versicolor was examined to obtain optimal medium and cultivation conditions.Both batch and repeated-batch processes were performed for laccase production.In repeated-batch fermentation with self-immobilized mycelia, total of 14 cycles were performed with laccase activity in the range between 3.4 and 14.8U/ml.     

电石渣和铝土粉的高温燃烧脱硫特性及微观分析

研究了电石渣和铝土粉作为燃煤添加剂的高温脱硫特性及其微观反应机理，发现在1200℃下燃煤中同时添加电石渣和铝土粉时，低温硫析出峰与只添加电石渣时几乎一致，而高温硫析出峰则大大降低，从而使脱硫率由30．5％明显提高到45．19％．XRD和SEM分析表明：电石渣中富含的CaO以及铝土粉中富含的Al2O3，与燃煤固硫过程中生成的部分CaSO4在高温下反应生成了耐热物相“硫铝酸钙”，是钙铝基添加剂比单纯钙基具有更高脱硫率的最主要原因．另外铝土粉增强了电石渣燃煤固硫渣的熔融程度，从而使硅酸盐熔融物有更多机会将CaSO4等固硫产物包裹以抑制其高温分解，是它具有更高脱硫率的另一个原因．     

我国非煤矿山安全生产的差距

从我国非煤矿山安全生产立法、安全生产管理体制、监察执法、群众监督、宣传教育、科研、矿山企业等方面与国外矿业进行了对比分析，分析了我国非煤矿山存在的问题以及与国外的差距，最后分析了产生问题与差距的原因。     

分级喷水增湿对半干法烟气脱硫效率的影响

研究了增湿水量、增湿水级数以及增湿水分配方式等参数对半干法烟气脱硫效率的影响。得出了一定试验条件下这些参数的优化值，它们分别为：增湿水量30％、三级增湿、递减分配方式。在此优化工况下，可以使塔内和系统脱硫效率分别达到68％和90％以上，比无增湿时分别提高6％和5％左右。     

Study on phosphorus loadings in ten natural and agricultural watersheds in subtropical region of China

Water eutrophication in subtropical regions of southern China threatens watershed health and is of major concern. However, annual phosphorus (P) loading and its dominant causes are still unclear, especially at the watershed scale. In this study, we investigated dynamic P loadings and associated factors (e.g., land use, livestock production, and runoff depth) in ten watersheds that varied in area from 9 to 5,212 ha in a hilly area of Hunan Province, China. A flowmeter was installed at the outlet of each watershed, and total P (TP) and soluble P (SP) concentrations were monitored periodically from June 2010 to October 2012. The results showed that annual P loadings (APLs) in the ten watersheds ranged from 22.8 to 247.8 kg P/km² and that P loss primarily occurred from April to June of each year during the main rainfall season in the study area. In addition, the average eutrophication (>0.05 mg P/L) ratio for stream waters was 86.7 % during the study period, which was indicative of a potentially serious condition for the local water environments. Annual P loadings were linearly related to livestock density (LD; R?=?0.92, p?<?0.01), whereas the eutrophication ratio of stream water was significantly (p?<?0.05) correlated with LD (R?=?0.61), percentage cropland (R?=?0.71), and percentage forest cover (R?=??0.68). Thus, it is concluded that the control of livestock production has the greatest potential for reducing P loadings in watersheds in this subtropical area. This will be beneficial to the amelioration and protection of local environment.     

广西邦亮东黑冠长臂猿栖息地的气候资源分析

气候资源是影响动物行为、发育、存活、繁殖与分布等的重要因子。为了探明广西邦亮东黑冠长臂猿栖息地的气候环境特征,对其栖息地附近县(乡)的主要气象要素进行统计与分析。结果表明:广西邦亮东黑冠长臂猿栖息地年均日照时数为1 521.8小时,月变幅为25.44%;年均气温为19.1℃,最冷月平均气温为11.0℃,最热月平均气温为25.0℃;年均降雨量为1 606.3 mm,月变幅为86.05%;年均蒸发量为1 507.1 mm,月变幅为28.06%;年均相对湿度为80%,月变幅为2.60%;年均风速为1.5 m/s,月变幅为15.4%。     

脱水污泥制备含炭吸附剂及其应用研究

采用热解炭化法、物理活化法、化学活化法制备污泥含炭吸附剂,通过静态吸附实验研究各种影响污泥含炭吸附剂吸附性能的因素.实验结果表明,采用化学活化法制得的污泥含炭吸附剂吸附性能最好,在以ZnCl2为活化剂、锯末添加剂投加量为脱水污泥质量的1%、ZnCl2为3 mol/L、活化温度为450 ℃、活化时间为1.5 h、固液质量比(干污泥与活化剂溶液的质量比)为1:4的最佳制备条件下,制得的污泥含炭吸附剂碘吸附值在520 mg/g以上,产物收率>60%,比表面积>230 m2/g,总孔容积为0.35 mL/g,其中微孔容积为0.08 mL/g,中孔容积为0.23 mL/g.利用其处理城市污水,其对COD、色度、TP的去除率好于选定的商品颗粒活性炭.     

复合式静电除尘器脱除电厂排放PM2.5研究

控制燃煤电厂的小颗粒PM2.5排放是控制大气可吸人颗粒物污染的重要途径之一.传统静电除尘器对亚微米级颗粒脱除效率较低,为提高脱除效率,建立了一种脉冲预荷电直流收尘的复合式除尘系统,采用较低能耗的高压窄脉冲放电对颗粒物预荷电,大大提高了亚微米级颗粒的荷电量.结合传统的直流静电除尘器可以大幅提高对亚微米级颗粒的脱除效率,对小于1μm的颗粒脱除效率可以达到90%以上.并分析了脉冲荷电的电源形式和电压等因素对脱除效率的影响,为改造传统静电除尘器提供了理论支持.     

燃油锅炉烟气尿素法同时脱硫脱氮技术

针对2th燃油锅炉烟气,采用尿素添加剂湿法同时脱硫脱氮技术进行治理。通过工程应用试验,确定工程运行时液气比为3Lm3,吸收剂尿素浓度为5%,添加剂浓度随其种类不同而不同。工程环保验收各指标均优于当地标准。