粒碱生产装置小结

介绍了气流式烧碱造粒的基本原理、特点和生产中易出现的问题及解决方法。     

活性污泥法污水处理厂的运行模拟

结合ASM1和二沉池模型组成活性污泥模拟系统,将某污水处理厂的常规检测数据转化为活性污泥系统模型所需的组分数据,然后调整模型参数,使污水处理厂出水指标最接近于污水处理厂实际数据,从而确定适合该污水处理厂的模型参数,最后对该污水处理厂的工艺参数进行了模拟改造。     

生物滤料滤池处理姚江微污染水源水

通过中试试验,考察了不同滤料介质的生物滤池对于姚江微污染水源水的处理效果。结果表明,双层生物滤料滤池能够有效地去除有机物、氨氮等污染物质,可以延长滤池反冲洗周期,并能在短时间内恢复到正常处理能力,适合于传统滤池的改造。采用颗粒活性炭-石英砂滤料滤池的综合处理效果优于同类型的颗粒活性炭-沸石滤料滤池,通过加入少量臭氧(0.8～1.0mg/L)可以提高生物滤池的去除效果。     

高效污泥脱水剂的应用

以聚丙烯酰胺类药剂为主要原料,通过改性合成FY高效污泥脱水剂.通过原料的筛选,不同反应条件的考察,获得最佳工艺条件.将合成得到的产品与进口药剂进行了污泥脱水效果的比较.实验证明,FY药剂不论是在处理效果上还是在成本上都达到了国外药剂的水平,并且药剂经复配后有更强的适用性.     

A fuzzy neural network approach for online fault detection in waste water treatment process

In this paper, an effective strategy for fault detection of sludge volume index (SVI) sensor is proposed and tested on an experimental hardware setup in waste water treatment process (WWTP). The main objective of this fault detection strategy is to design a system which consists of the online sensors, the SVI predicting plant and fault diagnosis method. The SVI predicting plant is designed utilizing a fuzzy neural network (FNN), which is trained by a historical set of data collected during fault-free operation of WWTP. The fault diagnosis method, based on the difference between the measured concentration values and FNN predictions, allows a quick revealing of the faults. Then this proposed fault detection method is applied to a real WWTP and compared with other approaches. Experimental results show that the proposed fault detection strategy can obtain the fault signals of the SVI sensor online.     

酸化水解-活性污泥-生物接触氧化工艺处理有机污水

介绍了采用酸化水解——活性污泥——生物接触氧化工艺处理含有山梨醇、甘露醇、蔗糖、醋酸乙烯、甲基纤维素的有机污水。该工艺具有出水水质稳定，操作简单、管理方便，能耗低等优点，是处理该类有机污水的有效方法。     

油田含油固体废物处理方法初探

通过对国内外油泥(砂)处理技术的对比分析，结合对胜利油田油泥(砂)治理技术的研究，找出一条适应国情的油田油泥(砂)处理工艺技术。     

Flow regime, hydrodynamics, floc size distribution and sludge properties in activated sludge bubble column, air-lift and aerated stirred reactors

This paper presents a comparative study how reactor configuration, sludge loading and air flowrate affect flow regimes, hydrodynamics, floc size distribution and sludge solids-liquid separation properties. Three reactor configurations were studied in bench scale activated sludge bubble column reactor (BCR), air-lift reactor (ALR) and aerated stirred reactor (ASR). The ASR demonstrated the highest capacity of gas holdup and resistance, and homogeneity in flow regimes and shearing forces, resulting in producing large numbers of small and compact flocs. The fluid dynamics in the ALR created regularly directed recirculation forces to enhance the gas holdup and sludge flocculation. The BCR distributed a high turbulent flow regime and non-homogeneity in gas holdup and mixing, and generated large numbers of larger and looser flocs. The sludge size distributions, compressibility and settleability were significantly influenced by the reactor configurations associated with the flow regimes and hydrodynamics.     

The availability of nitrogen following topsoil application of liquid digested sludge

Samples (375 g) of the Evesham series (clay loam) soil were incubated under aerobic conditions at 20 °C following incorporation of liquid mesophilic digested sewage sludge (1150 mg N L^–1). Simultaneously, pot trials under field conditions were also established. Total soluble N total oxides of nitrogen, ammonium N and headspace carbon dioxide samples were determined periodically over the first 480 day degrees C. Soluble organic N fractions were also calculated and it was found that the soil water concentration of available N (as nitrate N) could be predicted from summation of SON and NH₄-N on sludge application. The accumulation of nitrate N was compared with field derived data and both correlated well to a 2 pool exponential model. High rates of nitrification were observed and 70% of the organic N applied was mineralised over 480 day degrees C. The use of the relative quantity of soluble to insoluble organic N could be a possible indicator of subsequent nitrogen availability in field application.     

污水厂污泥制备吸附剂及其脱硫机理研究

以城市和石化污水厂生化活性污泥及剩余污泥为原料,采用不同方法制备烟气脱硫吸附剂,对影响产物吸附性能的因素进行了研究。结果表明城市污水厂剩余污泥利用热解炭化法制备的吸附剂脱硫性能较好,其吸附过程可用Freundlich模型来描述,SO2-O2-N2体系吸附机理主要为物理吸附,SO2-O2-H2O(g)-N2体系SO2发生了催化氧化,以化学吸附为主。