水生腐殖酸分子量分布研究——Ⅰ.串联凝胶色谱法测定水生腐殖酸分子量分布

考察了测定水生腐殖酸分子量分布及其平均分子量的串联凝胶色谱法。结果表明,使用Sepbadex G-25和G-100两种凝胶的色谱柱系统的分离范围可从分子量1000左右到数万,几乎包括了水生腐殖酸分子量分布的整个区段。这样的串联凝胶色谱柱的标定曲线为一折线,可用分段函数近似地加以描述。     

混凝-预涂膜分离一体化技术在城市污水回用中的应用

利用集成混凝与硅藻土预涂膜分离技术深度处理城市污水厂出水以作为回用水.在混凝-预涂膜分离一体化设备内同时实现混凝剂反应、絮体生长、固液分离3个过程.结果表明,对于总磷浓度为5.0 mg·L-1、COD为100 mg·L-1的城市污水厂出水,投加聚合氯化铝75mg·L-1、膨润土100 mg·L-1,初始滤速为2.26 m·h-1时,出水总磷低于0.3 mg·L-1、COD低于30 mg·L-1.滤速与过水体积之间存在联系.混凝-预涂膜分离一体化处理单元的处理效果优于混凝-微滤单元,出水水质得到了一定程度的提高,达到了高效分离的目的,具有较好的应用前景.     

滇池有机物及氮、磷污染底泥雨水淋滤试验分析

对滇池有机物和氮、磷污染底泥雨水淋溶试验表明,试验底泥结构致密,渗透性能很差,雨水对底泥的淋滤作用一般仅局限于对表层的雨水击溅.     

污水处理厂污泥脱水滤液循环利用的研究

对污水处理厂污泥机械脱水滤液进行了循环利用研究.将滤液与剩余污泥(mlss≤13000mg/l)按1比4的比例均匀混合,然后加入到沉淀器中进行重力浓缩试验,结果表明:它能够改善污泥的浓缩脱水性能,加快污泥的沉淀速度,增大浓缩污泥的浓度;生产运行数据分析显示:污泥脱水滤液与剩余污泥混合液进入浓缩池后,上清液更加清澈,污泥的固体负荷率显著提高,这既可降低污泥的处理成本,亦可减少污泥处理系统的基建投资,为污泥处理系统的工艺优化开辟了新途径.     

菌糠过滤处理染料溶液研究

探讨了用菌糠过滤处理染料溶液可行性。结果表明,菌糠对孔雀石绿、亚甲基蓝脱色率分别达到99%和96%以上,刚果红脱色率达到80%以上,溴酚蓝脱色率较低,在50%左右,混合染料溶液过滤不影响染料脱色。不同pH特性的染料溶液过滤后接近中性,菌糠对染料污染体系的pH有调节作用;菌糠过滤重复使用8次以上仍可保持相应的特性,初步说明菌糠过滤可以作为染料废水处理或预处理方法。     

振动落砂机噪声和粉尘的控制

本文结合沈阳水泥机械厂铸造车间二台１０ｔ振动落砂机噪声、粉尘治理，阐述了落砂机振动、噪声及粉尘飞扬的特点，控制原理、主要措施、治理效果．     

Possibilities for management of coastal foredunes with deteriorated stands ofAmmophila arenaria (marram grass)

Ammophila arenaria (marram grass) is the most important plant species for sand stabilization in European coastal foredunes. Stand degeneration due to poor supply of wind-blown sand enhances the susceptibility for wind erosion when successional species do not become established. ReplantedA. arenaria often fails to become established. In the present study we examined whether management practices such as mowing, fertilizing, burning or below-ground cutting of plants may be applied to re-establish the vigour ofA. arenaria. Field experiments performed at exposed sites, where naturally succeeding plant species are not supposed to become established due to salt spray, showed that none of the applied methods resulted into enhanced tiller density ofA. arenaria. Thus, further studies are necessary to solve this type of management problem. At the leeward side of foredunes, the successional speciesFestuca rubra ssp.arenaria andElymus athericus could be established successfully as both pre-grown seedlings and planted bundles of cuttings (all further experiments were fertilized). When planted in spring, cuttings of successional plant species established less than those planted in early winter. Water repellency of the sand surface is supposed to be the main cause for this. Pre-grown seedlings were less susceptible for the season of planting. Direct sowing was not effective. Rabbit browsing had to be omitted to obtain successful establishment. When living rhizomes of successional plant species were still present in the soil profile, fencing alone turned out to be effective to re-establish vegetation at initially bare sites.     

印染废水治理技术

论述了以铁碳过滤 +SBR为主要工艺的印染废水处理技术。该技术在实际工程中连续运行 8a的结果表明 :该工艺用于印染废水的治理切实可行、经济可靠 ,出水水质稳定能够达到国家一级排放标准 ,并能全部实现回用     

砂滤池改纤维滤池可行性分析

根据洛阳石化炼油污水装置砂滤池存在的问题，通过分析纤维束滤料的性能特点及工业应用现状，从工艺改造及运行费用方面对砂滤池改为纤维滤池的可行性进行了探讨。     

纤维直接过滤去除原水藻类

以丙纶丝为滤料 ,以自制转鼓装置对高藻原水进行直接过滤除藻试验。结果表明 ,对Chl a及藻总数的去除率分别为 64 %— 95 % (平均 91% )和 82 %— 96% (平均 92 % ) ,对主要藻种的平均去除率均在 85 %以上 ,除藻效果明显。原水中藻类特征、试验运行工况条件直接影响对藻类的去除效果。筛分截留与吸附 -絮凝是试验装置过滤除藻的主要机理