人工快渗工艺处理小城镇生活污水——以重庆大足县某镇为例

根据重庆市大足县某镇生活污水处理工程实例,探讨了以人工快渗为核心的污水处理工艺处理小城镇生活污水的可行性.根据实际工程的运行效果得出:人工快渗可应用于小城镇生活污水处理,对有机物、氨氮、总磷有显著的去除效果,出水能达到《城镇污水处理厂污染物排放标准》(GB 18918-2002)一级B类排放标准.     

用于小城镇污水处理的人工快渗技术研究应用进展

论述了用于小城镇污水处理的人工快渗技术的研究和应用进展,对人工快渗技术的系统组成、去污原理、系统复氧、系统设计和堵塞等方面的研究和实际问题进行了阐述;介绍了人工快渗技术在国内小城镇生活污水处理方面的应用情况及其应用前景.     

Research and Application Development of Constructed Rapid Infiltration System for Small Towns' Sewage Treatment

论述了用于小城镇污水处理的人工快渗技术的研究和应用进展,对人工快渗技术的系统组成、去污原理、系统复氧、系统设计和堵塞等方面的研究和实际问题进行了阐述;介绍了人工快渗技术在国内小城镇生活污水处理方面的应用情况及其应用前景.     

人工快渗技术(CRI)处理山地小城镇污水的应用

山区地势复杂,常规的小城镇污水处理系统处理效果较差。本文以重庆某山区污水为研究对象,采用改良后的人工快渗技术处理污水取得了相对于常规系统较好的效果。笔者首先对山区污水水质特征以及水处理现状进行了分析,然后根据试验项目对主要构筑物进行了设计,最后分析了项目运行效果。     

皖西地区小城镇污水处理适用工艺技术探讨

皖西地区小城镇污水排放具有水量小、水量水质变化大、污水收集困难等特点,根据污水处理的低建设运行成本、低运行管理及技术要求、高的污染物去除率及稳定性等要求,皖西小城镇污水治理的建设标准、排放标准、投资运行费用及处理工艺选择等宜合理选择制定。皖西小城镇污水治理应因地制宜地选择接触氧化、滴滤池、氧化沟、生态塘及人工湿地等工艺技术。     

一种低能耗污水处理技术

为研究低能耗污水处理技术,采用ABR(厌氧折流板)酸化反应器-两级人工湿地工艺处理生活污水.试验结果表明,本工艺对COD、BOD5、TN和TP平均去除率分别为92%、98%、29%、和64%,出水可以达到国家一级排放标准.该工艺适用于南方小城镇地区的污水分散处理.     

西部小城镇生活污水处理方法研究

随着城镇化的发展和人民生活水平的提高,城镇污水排放量逐年增长,小城镇污水处理已刻不容缓.文章就小城镇生活污水的特点,提出了几种建设费用低、运行管理费用低、操作管理需求低、二次污染物排放少的新型城镇污水处理技术.     

分散式农村生活污水治理技术集成应用

针对太湖流域水污染问题以及太湖流域城镇污水处理排放标准,本文提出“厌氧＋耗氧的微动力地埋式生活污水处理工艺＋人工湿地处理工艺”,将几种生活污水处理技术集成应用于农村生活污水处理,实现污水资源化。     

人工湿地在重庆高寒地区集镇生活污水处理厂的应用

采用预处理+人工湿地处理高寒地区污水工艺,可以保证污水处理出水达《城镇污水处理厂污染物排放标准》(GB18918-2002)一级A排放标准,同时运行成本也低,便于污水处理厂的运行管理。     

污水处理厂生物处理工艺筛选研究

目的研究不同污水处理工艺,选择最优方案,进而解决河南省某市西部城区排放的工业废水和县城排放的生活污水处理问题.方法从污水处理效果、技术经济等方面对比分析厌氧滤池联合曝气生物滤池工艺和A~2/O工艺,通过对污水原水水质指标的检测、水量的确定,结合污染物排放标准控制,制定最优污水处理工艺流程.结果二级处理采用厌氧滤池联合曝气生物滤池工艺,深度处理工艺采用混凝沉淀+生物活性炭滤池更好,处理后出水水质可达到一级A标准.从技术经济角度上,设计工艺推荐采用厌氧滤池联合曝气生物滤池工艺方案.经二级和深度处理后出水水质达到一级A标准.结论使用该工艺处理废水,可有效解决排放的污水,使得出水中BOD、COD、SS等指标均达到排放标准.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-