污水处理厂污泥的处理处置研究

处理污水所产生的污泥未经处理处置直接进入环境后,将对环境造成二次污染,其对生态环境和人类活动构成了严重威胁。污泥处理和处置是解决污泥问题密不可分的两个环节,污泥如何处理、达到何种处理程度取决于污泥处置的方式,处置决定处理。因此如何合理地处理、处置污泥,已成为城市污水厂和相关部门必需引起重视的问题。     

南京江心洲污水处理厂污泥处置比较分析

污泥是城市污水厂在废水处理过程中产生的污染物,在兼顾环境生态效益、社会效益和经济效益的前提下,污泥的处理、处置与利用相结合,是污泥处置的发展方向。本文通过对南京市江心洲污水处理厂污泥掺烧的成本和效益、运行情况、工艺系统、存在问题等方面进行介绍和分析。     

广州市污水污泥处理处置初步研究

概述了广州市城市污水处理厂污泥的产生、特性、处理和处置问题。论述了污泥处理和处置方法的进展,并结合广州市污泥特点等实际情况,提出了污泥处理处置的几种对策,逐步实现污泥的稳定化、减量化、无害化。     

城市污水污泥的处理处置技术及工艺分析

本文论述了城市污水污泥处理处置现状，以及污水污泥处理处置的一般原则以供参考。     

水处理污泥的处理处置的发展现状探讨

由于我国污水处理界一直有“重水轻泥”倾向,且由于污泥处理的投资和运行费用极大,可占整个污水厂投资及运行费用的25%～40%,甚至高达60%,已成为城市污水处理厂所面临的沉重负担,大量没有经过无害化处理的污泥被弃置,造成二次污染,严重影响了污染治理的实际成果,并给当地的生态环境带来了严重的安全隐患。因此,城市污水厂污泥的处理处置已成为我国当前面对的重要环境问题之一,妥善解决城市污水处理厂污泥的处理处置问题,是十分艰巨而紧迫的任务,具有十分重要的意义。     

城市污水处理厂污泥处理解决方案

该文对城市污水处理厂的建设运行,污水得到了处理,而怎样对污泥处理处置提出了解决方案并做了一些分析。首先对城市污水处理厂污泥特性、污泥处理处置原则进行了说明,对污泥处理处置以稳定化、无害化、减量化、资源化为原则对污泥消化、堆肥、干燥、填埋、焚烧等工艺流程、优缺点作了详尽阐述,对污泥的建材利用做了介绍,并以乌鲁木齐市河东污水处理厂为实例对污泥厌氧消化沼气利用技术进行了举例说明。     

城市污泥处置方法概述

城市污水污泥的处置已成为目前环境科学研究领域中的重要问题。城市污泥是城市污水处理的副产品，不仅产生量大，而且成分复杂，如果处理不当，将会造成环境的二次污染。同时，污泥作为二次资源，如何经济、合理地利用也是当今社会广泛关注的问题之一。概述了当前城市污泥处置的方法及研究进展。     

浅谈城市污水处理的措施与途径

随着我国城镇化建设的进程以及小城镇建设步伐的日益加快,城市污水的产量近年来明显增加,污水处理和污泥的处置已演变成较为严峻的社会问题.针对目前污水厂污泥传统处理方法如填埋、焚烧、填海及土地利用等存在的不足与弊端,本文探讨了城市污水资源化利用的最终处置方式,为今后城市污水的资源化利用提供参考.     

浅谈污泥的处置与利用

作为城市污水处理厂的副产物,城市污泥产量巨大且成分复杂,如何对它进行合理利用已越来越受人们关注。本文介绍了污泥处理处置和利用的现状、原则、处置方法及综合利用,并指出污泥资源化是污泥处置的最终目的。     

污泥性质、胶羽结构与处置

污泥处置近来已成为极重要的环境问题。本文综述了污泥处置研究发展现况，论述了各种类型的污泥与其组成颗粒的特性、结构和污泥处置中的各种重要程序，并进一步讨论了污泥的后处理，如杀菌、水解、热处理与资源亿等，以及近年来对污泥胶羽结构研究的进展。     

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-