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Ge S.,Beijing University of Technology | Zhu Y.,Beijing University of Technology | Zhu Y.,China Light Industry International Engineering Co. | Qiu S.,Queens University | And 4 more authors.
Water Science and Technology

This study evaluated the performance of a full-scale upgrade of an existing wastewater treatment plant (WWTP) with the intermittent cyclic extended aeration system (ICEAS), located in Qingdao, China. The ICEAS system was not able to meet effluent standards; therefore, a series of modifications and control strategies were applied as follows: (1) floating plastic carriers were added to the tank to aid biofilm formation; (2) operation parameters such as mixing and aeration time, feeding rate, and settling time were adjusted and controlled with a real-time control system; (3) a sludge return system and submersible water impellers were added; (4) the aeration system was also improved to circulate carriers and prevent clogging. The modified ICEAS system exhibited efficient organic and nutrient removal, with high removal efficiencies of chemical oxygen demand (89.57± 4.10%), NH4 +-N (95.46±3.80%), and total phosphorus (91.90±4.36%). Moreover, an annual power reduction of 1.04 × 107 kW·h was realized as a result of these modifications. © IWA Publishing 2014. Source

Cao C.-H.,China Light Industry International Engineering Co.
Chung-kuo Tsao Chih/China Pulp and Paper

The air flow distribution in air supply system for the combustion of chemical recovery furnace was reviewed, the current situation and development trend of the air flow distribution were introduced, the interaction of the operation parameters of the air supply system and its impact on the operation of the furnace were discussed. Source

Xing J.,Beijing Jiaotong University | Guo C.,Beijing Jiaotong University | Zhang P.,China Light Industry International Engineering Co. | Yang Q.,Beijing Jiaotong University
Jianzhu Cailiao Xuebao/Journal of Building Materials

Steel Q235B is one of the most widely used structure steels in China. There are as yet no toughness parameters of void growth model(VGM model) and stress modified critical strain model(SMCS model) for such a popular material. Taking 4 types of steel Q235B materials extracted from the hot-rolled seamless pipe and the matrix, heat affected zone as well as welded zone of cold-welding pipe, eight smooth round coupons and twenty-four notched round coupons were prepared. A series of uniaxial tensile tests were carried out, and finite element analyses as well as scanning electron microscopic tests were done too. Toughness parameters of VGM model and SMCS model for steel Q235B had been acquired, the characteristic length of steel Q235B was confirm. Experimental verification was made for the predict effect of ductile fracture of steel Q235B by VGM model and SMCS model. Research result shows that both VGM model and SMCS model can accurately predict the ductile fracture of steel Q235B. ©, 2015, Tongji University. All right reserved. Source

Niu S.,China Light Industry International Engineering Co.
Chung-kuo Tsao Chih/China Pulp and Paper

Selection of measurement methods, implementation of compensation steps and proper installation are three main aspects for realizing accurate drum water level measurement. Based on this idea, this article puts forward the countermeasures for decreasing the measurement error by analyzing the cause of drum water level measurement error of high-pressure alkali recovery boiler based on a project case. Source

Fuming J.,China Light Industry International Engineering Co.
International Mechanical Pulping Conference, IMPC 2014, part of PulPaper 2014 Conference

Unlike in other countries of the world, chemical mechanical pulp has been developing fast in China in recent years. This paper describes the current situations of chemical mechanical pulp production in China on the aspects of raw materials supply, products, process technologies adoption, new technologies application, etc. and introduces the technologies and equipment for effluent treatment to meet the environmental discharge standard of China in light with the fiber resources, water resources, environmental conditions, etc. in China. Source

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