净水厂V型滤池运行优化分析

对某净水厂V型滤池运行5年的相关数据进行跟踪检测研究,摸索合适的V型滤池运行方式,总结和分析滤池参数和水质去除率变化的趋势。结果表明:根据生产实际情况可摸索最佳的V型滤池反冲洗强度和周期,对V型滤池及时补砂可显著改善V型滤池过滤效果,V型滤池对浊度、COD_(Mn)的去除率表现良好,分别为85%~90%和43%~56%,对氨氮去除稳定性较差。     

低硅水快滤池的优化改造

针对低硅水快滤池在运行过程中连续出现陶瓷滤砖破裂及水泥嵌缝损坏等问题,对该滤池进行了改造.通过改造,滤池的过滤效率有所提高,使用寿命得到了延长,系统运行可靠性也有了提高.     

水厂虹吸滤池自动化改造

针对虹吸滤池运行中存在的主要问题,在不改造滤池主体结构的情况下,实现了虹吸滤池全自控运行。介绍梅山水厂虹吸滤池全自控系统改造原理、主要设备及其功能、产生效益。     

生物活性炭滤池气水反冲洗方式的优化

生物活性炭滤池冲洗效果的好坏是影响滤池运行的一个关键因素,合理优化反冲洗过程有助于改善其整体运行性能。采用3种不同的气水反冲洗方式对生物活性炭滤池进行反冲洗,以反冲洗后水头损失变化和出水浊度,氨氮、亚硝酸氮、CODMn去除率及DO消耗率作为评价指标。试验结果表明,先气水反冲后水反冲效果最好。其中气水反冲4~5min,气反冲强度为9L/(m^2·s),水反冲强度为4L/(m^2·s);水反冲8~10min,水反冲强度为8L/(m^2·s)。     

曝气生物滤池在印染废水处理中的应用

本文进一步研究印染厂废水处理中应用曝气生物滤池将排放口出水进行再回收利用,对处理结果进行了观察和分析。经结果显示,曝气生物滤池在水里负荷为1.03m3/(m2·h)时,COD的去除率为31.1%,通过纳滤预处理后,机械过滤和混凝沉淀的出水浊度和SDI值分别约是1.66NTU和4.2;回收纳滤系统中时间延长而导致降低水质的回收率,压力差因此会升高;纳滤系统在进水3750~4280mg/L的TDS中,拖延率平均为96.2%;化学清洗后的水回收率有92.60%可恢复系统运行初期,而拖延率在清洗前、后的变化不明显。应用曝气生物滤池处理后再回收利用站排放口出水的效果非常显著。     

环形A/O生物滤池处理城市生活污水

介绍了山西阳泉污水处理厂环形A/O生物滤池的特点,并结合该厂污水处理工艺流程和主要工艺参数对实际运行情况进行了论述。运行结果表明:环状生物滤池较普通生物滤池对进水的水质水量有更大的耐冲击能力,除磷脱氮效率高40%~50%;经过二级处理,出水能够达到排放标准,三级处理后可作为中水回用。     

Biostyr曝气生物滤池研究进展

简单介绍了Biostyr曝气生物滤池的发展概况,重点阐述了其工作原理以及其主要优点和存在的不足,并结合国外的工程实例进行了讨论。     

曝气生物滤池生物膜挂膜研究

通过曝气生物滤池挂膜研究,比较不同的挂膜过程优劣。     

立式纤维滤布滤池用于污水深度处理的研究

立式纤维滤布滤池是一种用于污水处理厂深度处理的新型水处理设备,将沉淀和过滤集中在同一滤池内以同步去除TP(总磷)和SS(水中悬浮物)。以中原油田第一社区污水处理厂为例,阐述立式纤维滤布滤池的工作原理和设计方法,分析运行方式和设计参数选择,给出实际运行效果。     

复合絮凝剂与活性砂滤池协同深度处理印染废水研究及应用

采用复合絮凝剂和活性砂滤池协同处理印染废水,研究了复合絮凝剂对浊度、COD(化学需氧量)和TP(总磷)的去除性能,在实际运行系统中考察了复合絮凝剂和活性砂滤池协同处理后的出水水质情况。结果表明:活性砂滤池在平均处理水量为3 500 m3/h情况下,当复合絮凝剂投加量为ρ(PAC)=50 mg/L,ρ(FeCl3)=10.0 mg/L,ρ(APAM)=1.0 mg/L时,出水水质指标浊度、COD和TP的平均去除率分别达到了56.6%,45.3%,59.4%,出水水质各项指标均达到《城镇污水处理厂污染物排放标准》(GB 18918-2002)一级A标准。     

HUEI: Pricing a Chinese saving-borrowing pool

This paper tries to provide proper pricing methods for Traditional Huei Pool (THP), a very popular investment/borrowing vehicle in Taiwanese society. We find that THP equals the sum of a series of amortised loans by the dead members plus a newly formed THP by living members. If forming and terminating a THP is without any cost, it can be proven that the value of THP equals the discounted value of future payments by dead members. In addition, credit risk will increase the Huei discount and therefore will increase the funding cost for the Huei bidder.     

带式压滤机运行中常见问题及处理措施

阐述了带式压滤污泥处理系统的组成及原理,总结了该系统在运行过程中常遇到的问题,如气路漏气和气动元件堵塞、重力脱水区滤水通道不畅、冲洗喷嘴堵塞、滤带跑偏、絮凝剂制备站排出口堵塞等,并提出了相应的处理措施。     

电力滤波器的研究现状概述

谐波对电网和其他系统的危害越来越大。解决谐波问题的一种有效方法就是使用滤波装置,无源滤波器因其功率大、成本低等优势在大功率用电系统中得到了广泛的应用;有源电力滤波器(APF)由于有很好的滤波特性及动态特性好等优势一直得到广泛关注,但其容量又限制了其实际应用。将有源电力滤波器与无源电力滤波器相结合,构成混合有源滤波器(AF),取两者之长补有源电力滤波器之短,可以降低谐波补偿系统的成本,达到APF实用的目的。     

Prepurchase financing pool: Revealing the IRR problem

Internal rate of return (IRR) is one of the most common and important indicators in investment analysis because it is often used by managers and practitioners as a decision-making criterion. Moreover, the IRR reflects the financial cost in financing decisions and it helps to answer the following question when comparing different financing alternatives: “Which loan is the cheapest?” Among the different types of loans in Brazil, there is a financial product called a prepurchase financing pool (PPFP) that is generally regarded as the best option for financing or loans. The objective of this article is to use the prepurchase financing pool to show the flaws of IRR in financial analysis. In particular, when IRR is used to evaluate the prepurchase financing pool, one finds problems of reliability regarding (i) existence, (ii) uniqueness, and (iii) economic interpretation of the rate. The results show that the prepurchase financing pool is relevant evidence that the IRR flaws are found in financial products.     

Patent pools in 5G: The principles for facilitating pool licensing

Patent pools collect patents from multiple patentees and license them out as a package. They offer one-stop-shop licensing efficiencies, reduce transaction costs, and increase the predictability of the licensing environment for the benefit of innovation diffusion. However, pools failed to take off for previous cellular standards. This article analyses both retrospectively the reasons for such failures and prospectively what makes the 5G environment more conductive to pool formation and licensing. Avanci, a patent pool for licensing cellular standards in the Internet of Things (IoT), is a significant development but has limited licensing coverage so far. The article then recommends five policy principles to facilitate pool licensing in the IoT. They include recognising that only enough upstream SEP owners need to join the 5G pool to create a market signalling effect. Some vertically integrated SEP owners may remain outsiders, and some bilateral licensing may co-exist without damaging the pool's success. To encourage upstream SEP owners to join the pool, they should be allowed to set ‘high enough’ royalty rates and divide pools' royalties among members under value proportionality rules. 5G pools must also be flexible and adopt different licensing programs that consider the specificities of each IoT market. Finally, pool administrators should consult with IoT implementers before establishing licensing programs for them and have infringement legal standing if everything else fails. These principles would go a long way in spurring the broader use of 5G pool licensing for a more efficient, straightforward, and predictable IoT licensing environment.     

水闸消力池深度与长度计算中应注意的问题

水闸消力池深度和长度二者与过闸流量之间存在着必然联系,但在进行消力池深度与长度计算时,往往由于忽略它们之间的关系,以及消力池长度计算中忽略对水跃形式判断而导致计算结果的不准确.阐述了进行消力池深度和长度计算时应注意的一些误区.     

水泵进水池模型试验设计与验收标准的探讨

进水池能否为水泵提供良好的进水条件，对水泵的安全高效运行具有极其重要的影响。在讨论现有几种水泵进水模型试验特点的基础上，对水泵进水池模型试验设计准则、模型比尺的选择及其模型试验验收标准进行了分析和研究。     

To join or not to join: Examining patent pool participation and rent sharing rules

In recognition that participation in modern patent pools is voluntary, we present empirical evidence on participation rates and the factors that drive the decision to join a pool, including the profit sharing rules adopted by the pool's founders. In most participation contexts, the at-risk group is extremely difficult, if not impossible, to identify. For pools centered on technologies that result from a standard-setting process, in contrast, we are able to identify a relatively unambiguous population of patents eligible for inclusion but that have not been included in the pool. We find that vertically integrated firms, with patents and downstream operations, are more likely to join a patent pool and among those firms that do join, those with relatively symmetric patent contributions (in terms of value) to a standard appear more likely to accept numeric patent share rules for dividing royalty earnings.     

引市场之“水” 建人才“洼地”——山东广饶石化集团人力资源开发侧记

人是生产力中最活跃的因素，企业人力资源的开发利用程度，直接关系到企业的兴衰。近年来，山东广饶石化集团遵循市场经济法则，以激发人力资源要素为目标，引入市场“活水”，积极建立符合市场经济规律和企业实情的，能够激发活力、凝聚合力、开发潜力的人力资源管理体系。特别是在２００１年公司进一步深化产权制度改革、完善法人治理结构、减持国有股后，以“公开、公平、公正”为平台的人本竞争机制得到进一步修正，使企业吸引市场人才的“洼地”效应更加显现，促进了公司快速发展。２００１年，公司实现销售收入９．７亿元，创利税８１…     

滤纸对壬苯醇醚栓PH值的影响

滤纸是一种具有良好过滤性能的材料,纸质疏松,对溶液有很强的吸收能力。笔者经过多次实验验证,发现不同厂家的定性滤纸、定量滤纸,同一厂家的定量、定性滤纸均对壬苯醇醚栓PH值具有较大影响。