漳江调水工程水质目标可达性研究

针对峰头水库和漳江干流,分别建立零维水质模型和一维非稳态水量水质数学模型,并对参数进行率定。对9种不同调水方案实施后漳江流域近期(2015年)和远期(2020年)水质情况进行预测,结果表明:随着调水量和排污量的增加,漳江水质远期差于近期,且取水口越往漳江下游设置,调水对漳江水质的影响越小;总体上调水对漳江水质影响不大,调水后漳江水质达到地表水Ⅲ类水标准;漳江调水工程从对水质影响方面来说是可行的。     

内部装修的消防安全隐患及对策

随着改革开放和市场经济的不断发展,人们生活质量的不断提高,对于建筑内部装修和布置要求也越来越高档、豪华、舒适,尤其是一些歌舞厅、KTV包厢、桑拿浴室、网吧等公共娱乐场所以及宾馆、饭店、大型商场等公共聚集场所和不在少数的居民家庭,为了减轻结构自重,方便建筑内空间的合理划分和追求室内装饰时尚、品味,忽视消防安全,在建筑中大量使用易燃、可燃高分子材料,并大量使用合成及塑料制作的家具.……     

某商城冷却塔噪声治理

商用建筑中央空调所用冷却塔由于受局限,与办公和居民点距离过近,其噪声常常超标,因此商场冷却塔噪声需要治理是比较常见的问题。从噪声源分析入手,采用隔声、吸声、消声、淋水噪声控制及减震五种手段进行综合治理,收到了较好的效果。     

Synthesis and scale inhibitor performance of polyaspartic acid

Polyaspartic acid (PASP) has been extensively studied in recent years as a green scale inhibitor. PASP was synthesized by thermal polycondensation of maleic anhydride and ammonium carbonate in this study. The optimal polycondensation reaction conditions were the raw material (maleic anhydride and ammonium carbonate) molar ratio of 1.0:1.2, the polymerization temperature of 180°C and reaction time of 2.0 hr. The results showed that PASP exhibits very good scale inhibiting performance. The inhibition rate was 95% for calcium carbonate and 90% for calcium sulfate by the application of 5 mg/L PASP.     

日本高校环境人才培养体制建设特征分析

本文对日本高校的环境人才培养目标,相关课程体系改革及教学方法创新和人才培养规模等环境人才培养体制建设的现状进行分析研究后,认为在为中国逐步实现由人力资源大国向人才强国转变过程中,日本高校环境人才培养体制建设的经验和做法值得我们学习和研究。     

Arsenic removal from groundwater by acclimated sludge under autohydrogenotrophic conditions

Arsenic in the environment is attracting increasing attention due to its chronic health effects. Although arsenite(As(III)) is generally more mobile and more toxic than arsenate(As(V)), reducing As(V) to As(III) may still be a means for decontamination, because As(III) can be removed from solution by precipitation with sulfide or by adsorption or complexation with other metal sulfides. The performance of As(V) bio-reduction under autohydrogenotrophic conditions was investigated with batch experiments. The results showed that As(V) reduction was a biochemical process while both acclimated sludge and hydrogen were essential. Most of the reduced arsenic remained in a soluble form, although 20% was removed with no addition of sulfate, while 82% was removed when sulfate was reduced to sulfide. The results demonstrated that the reduced arsenic was re-sequestered in the precipitates, probably as arsenic sulfides. Kinetic analysis showed that pseudo first-order kinetics described the bio-reduction process better than pseudo second-order. In particular, the influences of pH and temperature on As(V) reduction by acclimated sludge under autohydrogenotrophic conditions and total soluble As removal were examined. The reduction process was highly sensitive to both pH and temperature, with the optimum ranges of pH 6.5–7.0 and 30–40°C respectively. Furthermore, Arrhenius modeling results for the temperature effect indicated that the As(V) reduction trend was systematic. Total soluble As removal was consistent with the trend of As(V) reduction.     

湿地基质及阴极面积对人工湿地型微生物燃料电池去除偶氮染料同步产电的影响

本研究采用人工湿地型微生物燃料电池处理偶氮染料X-3B,实现降解偶氮染料同步产电的效果.为了构建性能最优的人工湿地型微生物燃料电池(CW-MFC)系统,本研究主要从湿地基质和阴极面积两个方面研究系统构型对去除X-3B同步产电的影响,提高系统性能.研究表明以粒径10 mm、孔隙率30%的小石子作为湿地基质构造的CW-MFC系统微生物生物量最大,去除X-3B效果最好,脱色率高达92.70%,但其产电性能最差.较小的粒径和孔隙率使底层微生物生物量增加,促进X-3B的去除,但随着湿地基质粒径和孔隙率的减小,导致阴阳极营养物质不足,系统传质阻力增加,抑制了系统产电性能.X-3B的去除效果随着阴极面积的增加而提高直到阴极面积为594 cm~2时取得最大脱色率99.41%.当阴极面积继续增加时,CW-MFC系统产电性能上升趋势趋于平缓,X-3B去除效果呈现下降趋势,这是因为阴极反应过快导致更多的阳极电子输送到阴极用于产生电流,与X-3B发生反应的电子减少,阳极成为提高CW-MFC系统性能的限制因素.     

探究城市污水处理项目的环境影响评价

水作为人类赖以生存的主要能源物质,随着社会综合水平的提高,各行业对水资源的需求越是急切。而现阶段城市中大量污水给环境带来很多不利影响,环保公司针对城市污水处理不断在技术上进行突破、完善,将智能化节能技术运用到城市污水处理中,使设备、资源得到充分利用,为人们用水条件带来更加充沛、丰富的保障与支持。为有效处理城市污水,争取在城市污水处理发挥更大作用,带动城市环境可持续发展。     

不同给水管材对管壁附着生物膜铅、镉的解吸动力学研究

给水管壁生物膜会吸附水中的重金属元素积累在管壁生物膜中,在受到扰动时释放回到水体,危害饮用水水质安全。试验以上海管网末梢水为实验对象,研究了PVC、铸铁和紫铜等三种管材上生物膜对铅、镉的解吸特性。结果表明,PVC、铸铁和紫铜附着生物膜对铅的解吸容量qe分别为:5.92211μmol·m^-2、128.3051μmol·m^-2和21.1808,解吸速率常数k分别为:0.001060 m^2·μmol^-1·min^-1、0.000041 m^2·μmol^-1·min^-1和0.000503 m^2·μmol^-1·min^-1,对于镉元素三种材质的解吸容量qe分别为:14.71519μmol·m^-2、18.50481μmol·m^-2和2.25225μmol·m^-2;解吸速率常数k分别为:0.000102 m^2·μmol^-1·min^-1、0.001070 m^2·μmol^-1·min^-1和0.000103 m^2·μmol^-1·min^-1。