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Air Flotation Method in the Treatment of Oily Wastewater Application of Its Progress ZHU Huan-ying1,a, ZHOU Ming1,b 1Faculty of Civil Engineering, Kunming University of Science and Technology, Kunming, 650500, China aEmail:1151558287@qq.com, bEmail:591731298@qq.com Keyword: oily wastewater; treatment; studies; progress Abstract: With the social development, environmental pollution problems are emerging, especially oily wastewater discharges, it has been seriously polluted our water, therefore, the oily wastewater treatment technology research become a research hotspot.
According to the characteristics of oily wastewater, flotation process characteristics and engineering example shows that flotation oily wastewater treatment process better than others, because of the high oil removal efficiency of air flotation process, and processing speed is fast, safe, reliable, economical and practical, but also has a very good application prospects. 1 Classification of oily wastewater, characteristics and hazards 1.1 The classification of the oily wastewater According to sources of oily waste water and oil in the presence of water in different forms, it can be divided into slick, dispersed oil, emulsified oil and dissolved oil. 1.2 The characteristics of oily waste water Composition of the oil itself is very complex, it contain alkanes, cycloalkanes, aromatic hydrocarbons, and a variety of non-hydrocarbon components, such as sulfur compounds, nitrogen compounds etc.
Formation mechanism of bubbles and adhesion role of the flocculation particles is mainly the result of the combined effects of the following four factors: first, flocculation particles netting, wrapping and bridging role; second, flocculation particle adhesion bubble collision; third, micro-bubble with micro flocculation particle copolymerization; four, the involvement role of the surfactant. 3 Application of air flotation in oily wastewater treatment engineering 3.1 Reflux dissolved air flotation Reflux dissolved air flotation method is that the gas dissolved under pressure into partially treated water purification, dissolved air of purifying water again to return to flotation pond and mixed with tap water, due to the sudden decompression, supersaturated air of the water is released in the form of tiny bubbles, the bubble carrying oil beads and pollutants, rapidly ascent to the surface of the water，and separating with wastewater, so as to achieve the purpose of purifying wastewater.
Many engineering examples show that the effect of reflux dissolved air flotation treatment technology of oily water is obvious, and it has a lot of advantage, such as short residence time, simple operation, and good treatment effect.

Onset of triply diffusive convection in a Maxwell fluid saturated porous layer Moli Zhao1,a , Shaowei Wang 2,b, Qiangyong Zhang 1,c 1Geotechnical and Structural Engineering Research Center, Shandong University, Jinan, Shandong 250061, China 2Department of Engineering Mechanics, School of Civil Engineering, Shandong University, Jinan 250061, China ahello-zml@163.com, bshaoweiwang@126.com, cqiangyongz@sdu.edu.cn Keywords: Triply diffusive convection; Linear stability; The normal model; Maxwell fluid; Relaxation time Abstract.
Richardson: Non-Newtonian Flow in the Process Industries: Fundamentals and Engineering Applications (Butterworth-Heinemann, Oxford 1999) [22] S.

Key Laboratory of Road & Bridge and Undergroud Engineering of Gansu Province, Lanzhou jiaotong University, lanzhou 730070,CHINA; 2.
School of Civil Engineering, Lanzhou jiaotong University, lanzhou 730070,CHINA ; E-mail: 1 zhangyong_L@126.com; 2 wangpeishan0228@163.com; 2 956171256@qq.com Keywords: CRTS II unballasted track; high-speed railway; bridge; seismic response Abstract: Based on properties of high-speed railway bridge and rail system restraints, the rail-bridge model is established by considering CRTS II unballasted track and bridge structure.
Effects of rail system restraints on seismic response of multi-span simply supported girder bridge on high-speed railway [J].Word Earthquake E engineering. 2010, 26(4)：6-12
[4]Code for seismic design of railway engineering[S].

The Reliability Analysis of the Initiation Time for RC Members under Chlorine Salt Ingress and Local Micro-Climate Junting Jiao1, a *, Yinghua Ye2,b, Chenfei Wang1,c and Guochen Ye1,d 1School of Civil Engineering and Architecture, Xiamen University of Technology, Xiamen 361024, Fujian, China 2Department of Airport and Road Engineering, Bei Hang University, Beijing 100191, China ajtjiao@xmut.edu.cn, byhye@buaa.edu.cn, c2013110904@xmut.edu.cn, dgchye@xmut.edu.cn Keywords: Chlorine salt ingress, Reinforced concrete remembers, Temperature, Relative humidity, The initiation time, Reliability.
Engineering Applications One RC rectangular cross section simply supported beam [11].
Khaled, Reliability-based assessment of the effect of climatic conditions on the corrosion of RC structures subject to chloride ingress, Engineering Structures, 32(2010) 3279-3287

EFGM has a promising prospect in engineering application.
International Journal for Numerical Methods in Engineering, 1994, 37(2): 229-256
Chinese Civil Engineering Journal,2006,36(10):29-33.
Chinese Journal of Geotechnical Engineering,1999,21(6):690-695.

Study on the Modal Analysis of the Cleaning Mechanical Drive Axle Housing Xiaozhu Xie1,a,Weiguo Wang1,b, Xin Wei1,c, Wei Hu1,d, Qinglei Ren1,e, Xuerui Yuan 1,f 1Faculty of Electromechanical Engineering, Guangdong University of Technology, Guangzhou, Guangdong, 510006, China axiaozhuxie@gdut.edu.cn,bwangweiguogg@yahoo.cn.cweixin@gdut.edu.cn, dhuweigdut@126.com,exintairen@126.com, fyxr963@126.com.
Modal analysis, a very effective dynamic analysis [2], has been widely used in mechanical, civil, energy & power, transportation and other engineering fields.
However, due to the complexity and diversity of the practical engineering, it is very difficult to establish a mathematical model which is exactly the same as the actual structure.
The closed frequency band range is set from 0-2500Hz by considering the working frequency of general engineering machinery.

Experimental Investigation on the Strengthening Composite Beam by Shaped-Steel under R.C Beam Jointed with Short Welding Rebar Litang Gao 1, a, Qiyun Shan 1,b and Taiwei Wu 2,c 1School of Civil Engineering, Qingdao Technological University, Qingdao, China 2Centre of Engineering Test and Appraisal, Qingdao Technological University, Qingdao, China agaolitang@qtech.edu.cn, bshanqiyun@126.com, cwtw126@126.com Key words: short welding rebar; added shaped-steel; strengthening beam; composite beam; bending capacity; stiffness.
Introduction For some reasons, maintaining and strengthening of structure is necessary to promote the resistance and stiffness of the beam in retrofitting engineering.
Engineers have paid more and more attention to the composite beam strengthened by shaped-steel underpinning (CBSSU), because it is an advanced method to strengthen structure with its validity, light weight and short period.

Reference to Chen Bin’s program of Zhejiang University [3,4], a model is built and solved combined with the performance and parameter of engineering materials.
According to the technical requirements of concrete, reference to the specification [5] and engineering experience, the limit values of water-cement ratio, sand rate and density is respectively set as 0.4~0.5, 30%~34% and 2350~2430kg/m3.
Computers & Structures, Vol.82(2004), p.281 [2] Yeh I C.ASCE J Comput Civil Eng Vol.13(1999,1), p.36 [3] Guohua Liu, Bin Chen, Shuyu Wang et al.
Journal of hydroelectric Engineering (2003,4),p. 45 (in Chinese) [4] Bin Chen, Fuqiang Li, Guohua Liu et al.
Journal of Zhejiang University (Engineering Science), Vol.39(2005,1),p. 16 (in Chinese) [5] JGJ55－2000.

Bisri 2,b, Rispiningtati 2,c, Lily Montarcih 2,d 1Department of Civil Engineering, Faculty of Engineering, University of Tadulako, Palu, Central Sulawesi of Indonesia 2Department of Water Resources, Faculty of Engineering, University of Brawijaya, Malang, East Java of Indonesia a wsutapa@yahoo.com, bMbisri@ub.ac.id, c rudysoen@yahoo.com, d lilymont@ub.ac.id Keywords: climate change, River Bangga, water balance model Abstract.
Al-Wagdany, Effects of Climate Change in Wabah River Basin, Journal of Hydrologic Engineering, 121 (2) (1995), 207-215.

Seismic damage analysis and reinforcement measures research of a long-span structure YongJunDeng1, a, YongYao1, b, Daiguo Chen 1, c 1Department of civil engineering and architecture of southwest university of science and technology, 621010, Mianyang, Sichuan province 1516341369@qq.com,2yy001221@163.com,3 cdg-927@163.com Keywords: long-span structure, Seismic damage detection, HADAS, Seismic strengthening Abstract: Taking a practical big span stadium project as the background, in view of its particularity that it suffered earthquake damage and fortification intensity increased after earthquake, through the field detection and finite element model to analyze earthquake damage of structure caused by Wenchuan earthquake, and research the feasibility of Seismic strengthening with HADAS on the structure whose fortification intensity increased after earthquake.
Engineering situation The sports teaching training center project is located in Mianyang city, Sichuan province.
Earthquake Engineering and Engineering Vibration.