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Shenzhen Municipal Design & Research Institute Co. and Shenzhen Bridge Design & Research Institute Co. | Date: 2011-09-30

A large-span and special-shaped arch bridge, comprising a main girder (

Zhang W.-G.,Changan University | Zou Y.-X.,Changan University | Sun G.-Q.,Shenzhen Municipal Design Research Institute Co. | Wang F.,Changan University
Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of Technology | Year: 2012

The photoeatalytic performance influencing factors of asphalt mixture adulterated with TiO 2 is now in low level. An experiment was designed to analyse the influencing factors according to the mechanism of its photoeatalytic, this experiment chose the photoeatalytic performance to CO and HC of mixture to be the object of research, and set up the conception of correction 'n' of gas concentration to deal with this problem. The results show that the grain size, crystalline nature, and modified by nonmetallic elements of TiO 2 is the internal cause of the photoeatalytic performance influencing factors while temperature and illumination intensity to be external cause. Asphalt mixture adulterated with N-doped anatase nanometer TiO 2 has high hotoeatalytic performance.

Yang S.-F.,Shenzhen Municipal Design Research Institute Co. | Zhang J.-J.,Shenzhen Municipal Design Research Institute Co. | Zou G.-L.,Shenzhen Municipal Design Research Institute Co. | Du Z.-L.,Shenzhen Municipal Design Research Institute Co.
Huanjing Kexue/Environmental Science | Year: 2014

Microbial granules were successfully developed in a pilot-scale sequencing batch reactor (SBR) for the treatment of real municipal wastewater. The aerobic granules developed had good settleability with a settling velocity of >21 m·h-1. The mature granular sludge was capable of simultaneous removal of chemical oxygen demand (COD), nitrogen (N) and phosphorus (P). With the cycle of 3 h, the effluent COD, ammonium nitrogen (NH4 +-N) and total nitrogen (TN) concentrations were <50 mg·L-1, <5.0 mg·L-1, and <15 mg·L-1, respectively. The removal efficiency for TN and total phosphorus (TP) was about 50%. Examinations by confocal laser scanning microscopy (CLSM) showed that extracellular polymeric substances (EPS) were uniformly distributed throughout the granules, forming the granule structure matrix. X-ray diffraction (XRD) analysis indicated the presence of SiO2 and other metal oxides inside aerobic granules, implying that minerals in real wastewater might function as the seed in the initial stage of aerobic granulation.

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