Application of BP NN and RBF NN in Modeling Activated Sludge System

Based on the operation data from a certain wastewater treatment plant(WWTP) in northeast China,the models of back propagation neural network ( BP NN ) and radial basis function neural network ( RBF NN ) have been designed respectively and the ability of convergence and generalization has been analyzed separately.As for BP NN, the effects of numbers of layers and nodes have been studied ; as for RBF NN, the influences of the number of nodes and the RBF‘s width have been studied. It is concluded that BP NN has converged much slowly in comparison with RBF NN. The conclusion that the RBF NN is suitable for modeling activated sludge system has been drawn. An automatically optimum design program for RBF NN has been developed, through which the RBF NN model of traditional activated sludge system has been established.     

影响污泥高温好氧堆肥的主要因素及其控制

分析了影响污泥堆肥化过程的主要因素,针对各种影响因素重点讨论了堆肥化过程的因素控制途径,并认为堆肥化过程因素的控制是一个复杂的多因素重叠的系统控制。     

污水污泥页岩实心砖砌体轴心抗压性能试验研究

通过制作多组试件对污水污泥页岩实心砖的轴心抗压性能进行试验,并和烧结粘土砖相对比,得出了污水污泥页岩实心砖砌体的轴心抗压强度指标值均高于相同等级条件的粘土实心砖砌体的轴心抗压强度值,为污水污泥页岩砖的实际应用提供了依据.     

Kinetics of aerobically activated sludge on terylene artificial silk printing and dyeing wastewater treatment

Aerobically activated sludge processing was carried out to treat terylene artificial silk printing and dyeing wastewater (TPD wastewater) in a lab-scale experiment, focusing on the kinetics of the COD removal. The kinetics parameters determined from experiment were applied to evaluate the biological treatability of wastewater. Experiments showed that COD removal could be divided into two stages, in which the ratio BOD/COD (B/C) was the key factor for stage division. At the rapid-removal stage with B/C>0.1, COD removal could be described by a zero order reaction. At the moderate-removal stage with B/C<0.1, COD removal could be described by a first order reaction. Then Monod equation was introduced to indicate COD removal. The reaction rate constant (K) and half saturation constant (KS) were 0.0208-0.0642 L/(gMLSS)·h and 0.44-0.59 (gCOD)/L respectively at 20 ℃-35 ℃. Activation energy (Ea) was 6.05×104 J/mol. By comparison of kinetic parameters, the biological treatability of TPD wastewater was superior to that of traditional textile wastewater. But COD removal from TPD-wastewater was much more difficult than that from domestic and industrial wastewater, such as papermaking, beer, phenol wastewater, etc. The expected effluent quality strongly related to un-biodegradable COD and kinetics rather than total COD. The results provide useful basis for further scaling up and efficient operation of TPD wastewater treatment.     

疏浚淤泥资源化利用于建筑陶瓷生产中的研究

研究利用经过分类处理的淤泥产物,代替部分高岭土类原料,作为生产建筑陶瓷产品(陶板、劈开砖、马路砖等一系列产品)的原料。研究结果认定可以作为替代生产建筑陶瓷的原料,其中疏浚淤泥的使用量在30%～50%之间。     

循环流化床锅炉处理污泥的技术及设备探讨

针对污水处理厂市政污泥的具体情况,来宾市垃圾焚烧发电厂结合自身循环流化床垃圾焚烧炉最适合掺烧污泥的实际生产工艺特点,将市政污泥通过焚烧法进行处置,同时污泥中有毒、有害物质也得到一定的处理,消除了污泥对环境的污染。     

降解五氯酚的微氧颗粒污泥理化特性的研究

对实验室培养的微氧颗粒污泥的理化特性进行考察。结果表明微氧颗粒污泥粒径分布为：下层〉中层〉上层。各层污泥中Fe含量最大；K、Na、Ca、Mg、Ni、Co、Mn、Cu和Zn等元素在各层污泥中均能检测到。微氧颗粒污泥的比重、SVI值、含水率和沉降速率均优于普通活性污泥。     

胞外聚合物对污泥脱水性能的影响及其提取方法研究

胞外聚合物(EPS)是微生物在一定环境条件下产生的包围在微生物细胞壁外的多聚化合物。它是活性污泥的重要组成部分,对活性污泥的理化性质产生重要影响,甚至是影响污泥减量的关键因素。本文对胞外聚合物的构成、性质及其对污泥脱水性能的影响进行综述,分析评价了EPS的各类提取方法,并对影响污泥EPS含量的因素及EPS的生物降解性进行了探讨,为进一步深入研究提供颇有价值的参考。     

抗震救灾精神是伟大民族精神的集中体现和新的发展——汶川特大地震周年祭

抗震救灾精神是伟大民族精神的集中体现和新的发展。它集中体现和丰富发展了中华民族天下兴亡、匹夫有责的精神,万众一心、同心同德的精神,众志成城、敢于胜利的精神,生命不息、奋斗不止的精神,不畏艰险、百折不挠的精神,以人为本、珍惜生命的精神,进一步增强了民族使命感、凝聚力和自信心,锤炼了民族自强品格,彰显了民族英雄气概,升华了民族价值取向,感天动地,可歌可泣,彪炳史册。     

污水厂污泥除臭去水增有机质处理效：果

采用添加促发剂和增素剂的方法,对城市污水厂污泥进行了除臭去水增有机质效果研究。结果表明,随着促发剂的添加,污泥粘稠度明显下降,水分含量降低近50％。气味由腐臭味慢慢转变为无臭味,但最后现出酸臭味;在24％的促发剂条件下,随着增素剂的量逐渐增加,污泥变得越来越松散;气味由酸腐味转变为泥草味,直至带有氨味的转变。在养分上,处理后有机质、全氮、五氧化二磷、氧化钾的含量范围分别为49．68％-63．89％,2．216％-3．630％,1．428％-1．696％,1．077％-1．467％。综合各种堆肥处理,以污泥＋24％促发剂＋16％-24％增素剂处理效果较好。