An integrated three-dimensional electrochemical system for efficient treatment of coking wastewater rich in ammonia nitrogen

Chemosphere ◽  
2020 ◽  
Vol 246 ◽  
pp. 125703 ◽  
Author(s):  
Zhenyu Wu ◽  
Weiping Zhu ◽  
Yang Liu ◽  
Pin Peng ◽  
Xiuyan Li ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Ammonia Nitrogen ◽  
Coking Wastewater ◽  
Electrochemical System ◽  
Efficient Treatment

Electrochemical treatment of residual ammonia nitrogen in biologically pretreated coking wastewater with three-dimensional electrodes

2011 ◽  
Vol 63 (11) ◽  
pp. 2732-2736 ◽  
Author(s):  
Xu-wen He ◽  
Li-yuan Liu ◽  
Hao Wang ◽  
Gong Zhang ◽  
Jing-wen Gong ◽  
...  
Keyword(s):  
Current Density ◽  
Three Dimensional ◽  
Surface Characteristics ◽  
Electrochemical Treatment ◽  
Ammonia Nitrogen ◽  
Electrode System ◽  
Coking Wastewater ◽  
Two Dimensional ◽  
Electrode Distance ◽  
Good Surface

The electrochemical oxidation of the residual ammonia nitrogen contained in biologically pretreated coking wastewater using three-dimensional electrode system was studied. The results show the Ti/RuO2/IrO2 anode plates and the coke have good surface characteristics for the purpose of this study. In addition, studies also show that the three-dimensional electrode system should be able to give a satisfied solution to the residual bio-refractory ammonia nitrogen in biologically pretreated coking wastewater in comparison to conventional two-dimensional electrodes. At coke size of 10–20 mesh, electrode distance of 1.0 cm and current density of 4.5 mA/cm2, the residual ammonia nitrogen in the three-dimensional electrode system was almost completely removed in 60 min.

scholarly journals Three-Dimensional Structures of Carbohydrates and Where to Find Them

2020 ◽  
Vol 21 (20) ◽  
pp. 7702 ◽  
Author(s):  
Sofya I. Scherbinina ◽  
Philip V. Toukach
Keyword(s):  
Experimental Data ◽  
Molecular Modeling ◽  
Computational Methods ◽  
Three Dimensional ◽  
Structural Diversity ◽  
Structural Data ◽  
Structural Features ◽  
Data Validation ◽  
Data Generation ◽  
Efficient Treatment

Analysis and systematization of accumulated data on carbohydrate structural diversity is a subject of great interest for structural glycobiology. Despite being a challenging task, development of computational methods for efficient treatment and management of spatial (3D) structural features of carbohydrates breaks new ground in modern glycoscience. This review is dedicated to approaches of chemo- and glyco-informatics towards 3D structural data generation, deposition and processing in regard to carbohydrates and their derivatives. Databases, molecular modeling and experimental data validation services, and structure visualization facilities developed for last five years are reviewed.

Preparation of Adsorbent from Blue Coke Powder and its Application in Coking Wastewater

2011 ◽  
Vol 695 ◽  
pp. 553-556
Author(s):  
Yu Hong Tian ◽  
Xin Zhe Lan ◽  
Qiu Li Zhang ◽  
Juan Qin Xue ◽  
Yong Hui Song ◽  
...  
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Removal Rate ◽  
Nitrogen Concentration ◽  
Ammonia Nitrogen ◽  
Raw Material ◽  
Coking Wastewater ◽  
Adsorption Time ◽  
Coke Powder

The low-cost blue coke industrial by-product, blue coke powder was used as raw material for the production of porous carbons adsorbent by steam activating at temperature of 800°C under the atmosphere of N2 for 60 minutes. The specific surface area and pore properties of the adsorbent were characterized by using N2 adsorption-desorption isotherms. Furthermore, the adsorption effects of the adsorbent for ammonia nitrogen in coking wastewater were investigated in terms of particle size, dosage of absorbent and adsorption time. The results show that the specific surface area is 620.94m2/g, the total pore volume is 0.4442cm3/g and the average mesopore size is 4.5808nm, the adsorbent possesses predominant mesoporous structures. In aeration, the removal rate of ammonia nitrogen can reach to 39.5% under the conditions of the ammonia nitrogen concentration of 625mg/L, the dosage of adsorbent 10g/L at the adsorption time of 60 minutes.

An integrated biological-electrocatalytic process for highly-efficient treatment of coking wastewater

2021 ◽  
pp. 125584
Author(s):  
Zhen-Yu Wu ◽  
Wei-Ping Zhu ◽  
Yang Liu ◽  
Lu-Lu Zhou ◽  
Peng-Xi Liu ◽  
...  
Keyword(s):  
Coking Wastewater ◽  
Efficient Treatment ◽  
Highly Efficient

scholarly journals Insight into the comparison of thermally and Fe(II) activated persulfate on sludge dewaterability and disintegration

2021 ◽  
Author(s):  
Shaodong Guo ◽  
Long Zhou ◽  
Yuxin Huang ◽  
Xinghu Huang
Keyword(s):  
Extracellular Polymeric Substances ◽  
Three Dimensional ◽  
Oxygen Demand ◽  
Ammonia Nitrogen ◽  
Fluorescence Excitation ◽  
Capillary Suction ◽  
Extracellular Polymer Substance ◽  
Sludge Dewaterability ◽  
Oxidation Efficiency ◽  
Degradation Effect

Abstract The effects of thermally and Fe(II) activated potassium persulfate (PPS) on sludge dewatering performance were compared systematacially. Sludge dewaterability was monitored by measuring capillary suction time (CST) and sludge specific resistance to filtration (SRF), and the degradation effect was characterized by Chemical oxygen demand (COD), total organic carbon (TOC), ammonia nitrogen (NH4+-N) and extracellular polymeric substances (EPS). The Change of extracellular polymer substance (EPS) including soluble, loosely bound and tightly bound EPS (S-EPS, LB-EPS and TB-EPS) with time and PPS dosage was monitored to discuss the oxidation efficiency of thermally and Fe(II) activated PPS. Sludge supernate were analyzed by three dimensional fluorescence excitation-emission spectrum (3D-EEM) to confirm the proteins transformation. The result showed that sludge dewaterability in terms of CST and SRF were enhanced with increasing PPS dosage and condition time of both two activated methods. While Fe(II) activated PPS could reduce sludge CST and SRF to preferred values at low PPS dosage and short condition time. Maenwhile, sludge degradation effect was also more obvious. Mechanically, sludge TB-EPS in proteins and polysaccharides converted to SB-EPS was more quickly with Fe(II) activated PPS. Besides, thermally activated PPS tended to oxidize the protein in the supernatant first.

Engineering Application Research of Enhanced Microbiological Treatment for Coking Wastewater

2011 ◽  
Vol 108 ◽  
pp. 257-261 ◽  
Author(s):  
Yan Qiu Wang ◽  
Yan Li Lv ◽  
Ming Jun Shan ◽  
Da Wei Pan
Keyword(s):  
Coke Plant ◽  
Engineering Application ◽  
First Grade ◽  
Ammonia Nitrogen ◽  
Coking Wastewater ◽  
Application Research ◽  
Processing Efficiency ◽  
High Concentrations ◽  
Area Occupation ◽  
Microbiological Treatment

The wastewater from the coke plant is of poor biodegradability with high concentrations of ammonia and organic pollutants. The engineering application research of enhanced microbiological treatment for coking wastewater was carried out in a coking plant located in Heilongjiang province. The daily capacity of the project is 1600 cubic meters. The system including bioreactors was started up successfully in winter. The CODCrand ammonia nitrogen contents of influent were 2500mg/l and 260mg/l respectively and the effluent met the requirements of first grade standard in "Integrated Wastewater Discharge Standard" (GB 8978-1996). Compared with traditional full nitrification denitrification process, the project has such feathers as lower energy consumption, smaller area occupation, less alkali adding, lower excessive microorganisms production, lower construction and operation costs and higher processing efficiency.

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