scholarly journals Treatment of High Salinity and High Strength Organic Wastewater Consisting of Sulfanilamide by Two-stage Contact Oxidation Process.

1995 ◽  
Vol 18 (9) ◽  
pp. 711-716 ◽  
Author(s):  
Zhen Jia ZHANG ◽  
Masayuki FUKAGAWA ◽  
Masao UKITA ◽  
Hiroshi NAKANISHI
Keyword(s):  
High Salinity ◽  
Oxidation Process ◽  
High Strength ◽  
Two Stage ◽  
Contact Oxidation ◽  
Organic Wastewater

The Treatment of Saline Wastewater Using a Two-Stage Contact Oxidation Method

1993 ◽  
Vol 28 (7) ◽  
pp. 31-37 ◽  
Author(s):  
An Li ◽  
Gu Guowei
Keyword(s):  
Organic Substances ◽  
Theoretical Discussion ◽  
Organic Loading ◽  
Saline Wastewater ◽  
Two Stage ◽  
Oxidation Method ◽  
Contact Oxidation ◽  
Organic Wastewater

This paper introduces the treatment of saline organic wastewater using a two-stage contact oxidation method. The experiment was carried out to explore how several factors affect the results of the treatment such as salinity, organic loading and organic ingredients in influent. The experiment revealed the organic loading ranges within which the salinity had less effect on the treatment efficiencies when influent salinity was 25,000 ppm and 35,000 ppm respectively. Moreover there is a theoretical discussion on the effect of organic ingredients on the removal of organic substances from wastewater.

Influence of High-Salinity Impact Load on an Integrated Sync Contact Oxidation Process

2014 ◽  
Vol 926-930 ◽  
pp. 396-399
Author(s):  
Peng Fei Yu ◽  
Ya Ting He ◽  
Jin Xiang Fu
Keyword(s):  
Hydraulic Retention Time ◽  
High Salinity ◽  
Oxidation Process ◽  
Impact Load ◽  
Effluent Water ◽  
Sludge Treatment ◽  
Salinity Shock ◽  
Contact Oxidation ◽  
Total Nitrogen Removal ◽  
Biological Contact Oxidation

To solve the problem of high-salt ballast wastewater treatment, biological contact oxidation process by combined packing used to simulate the experimental study. When dissolved oxygen is 5 to 6, water temperature is 18 ~ 20 °C, pH is 7~8 and hydraulic retention time is 48h, the Influence of salinity dips and swells process on sludge treatment system and its effects were investigated. The results showed that salinity shock loads on the system less affected COD removal, after 3-5 days short adaptability run, the system became able to restore effluent water stability. The influence of Salinity swells process on AOB, NOB and denitrifying bacteria was greater than a dip .Salinity plunged produced smaller impact on the total nitrogen removal, while in the salinity swells TN removal reduced from 70.7% to 42%.

scholarly journals Carbon Redistribution and Microstructural Evolution Study during Two-Stage Quenching and Partitioning Process of High-Strength Steels by Modeling

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2302 ◽  
Author(s):  
Yilin Wang ◽  
Huicheng Geng ◽  
Bin Zhu ◽  
Zijian Wang ◽  
Yisheng Zhang
Keyword(s):  
Retained Austenite ◽  
Volume Fraction ◽  
High Strength Steels ◽  
High Strength ◽  
Simulation Method ◽  
Low Carbon ◽  
Two Stage ◽  
Quenching And Partitioning ◽  
Carbon Redistribution ◽  
Carbon Martensite

The application of the quenching and partitioning (Q-P) process on advanced high-strength steels improves part ductility significantly with little decrease in strength. Moreover, the mechanical properties of high-strength steels can be further enhanced by the stepping-quenching-partitioning (S-Q-P) process. In this study, a two-stage quenching and partitioning (two-stage Q-P) process originating from the S-Q-P process of an advanced high-strength steel 30CrMnSi2Nb was analyzed by the simulation method, which consisted of two quenching processes and two partitioning processes. The carbon redistribution, interface migration, and phase transition during the two-stage Q-P process were investigated with different temperatures and partitioning times. The final microstructure of the material formed after the two-stage Q-P process was studied, as well as the volume fraction of the retained austenite. The simulation results indicate that a special microstructure can be obtained by appropriate parameters of the two-stage Q-P process. A mixed microstructure, characterized by alternating distribution of low carbon martensite laths, small-sized low-carbon martensite plates, retained austenite and high-carbon martensite plates, can be obtained. In addition, a peak value of the volume fraction of the stable retained austenite after the final quenching is obtained with proper partitioning time.

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