scholarly journals Experimental Study on the Absorption of Toluene from Exhaust Gas by Paraffin/Surfactant/Water Emulsion

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Ping Fang ◽  
Zi-jun Tang ◽  
Xiong-bo Chen ◽  
Zhi-xiong Tang ◽  
Ding-sheng Chen ◽  
...  
Keyword(s):  
Gas Flow ◽  
Organic Waste ◽  
Saturation Pressure ◽  
Absorption Efficiency ◽  
Exhaust Gas ◽  
Water Emulsion ◽  
Gas Treatment ◽  
Waste Gas ◽  
Volatile Organic ◽  
Waste Gas Treatment

A new paraffin/surfactant/water emulsion (PSW) for volatile organic compounds (VOCs) controlling was prepared and its potential for VOCs removal was investigated. Results indicated that PSW-5 (5%, v/v) provided higher toluene absorption efficiency (90.77%) than the other absorbents used. The saturation pressure, Henry’s constant, and activity coefficient of toluene in PSW-5 were significantly lower than those in water, and toluene solubility (1.331 g·L−1) in the PSW-5 was more than 2.5 times higher than the value in water. Several factors potentially affecting the toluene absorption efficiency were systematically investigated. The results suggested that concentration and pH of PSW, absorption temperature, and gas flow rate all had a strong influence on the toluene absorption, but the inlet concentration of toluene had little effect on the toluene absorption. There were different absorbing performances of PSW-5 on different VOCs, and the ketones, esters, and aromatics were more easily removed by the PSW-5 than the alkanes. Regeneration and reuse of the PSW were possible; after 3 runs of regeneration the absorption efficiency of PSW-5 for toluene also could reach 82.42%. So, the PSW is an economic, efficient, and safe absorbent and has a great prospect in organic waste gas treatment.

ANNs for Identifying Shock Loads in Continuously Operated Biofilters

2012 ◽  
pp. 72-103 ◽  
Author(s):  
Eldon R. Rene ◽  
M. Estefanía López ◽  
Hung Suck Park ◽  
D. V. S. Murthy ◽  
T. Swaminathan
Keyword(s):  
Gas Flow ◽  
Theoretical Background ◽  
Shock Loads ◽  
Gas Treatment ◽  
Flow Rates ◽  
Waste Gas ◽  
Pollutant Concentrations ◽  
Industrial Complexes ◽  
Waste Gas Treatment ◽  
State Models

Among the different waste gas treatment techniques developed to eliminate odorous and toxic pollutants from air, biological techniques have emerged as an effective, reliable, eco-friendly, simple, and economical option. Biological waste gas treatment systems such as biofilters are commonly used in industrial complexes to handle emissions at high gas flow rates and low pollutant concentrations (<5 g/m3). However, from a practical view-point, variation in concentrations and gas flow rates are common to any industrial emission, and it is a pre-requisite to simulate these conditions (shock loads) at the laboratory scale. This chapter provides sufficient theoretical background information on the different waste gas treatment systems, literature review on shock loads in biofilters, and the different steady and transient state models developed in the field of biofiltration. A fundamental overview of artificial neural networks and the different steps of the modeling process are also presented.

scholarly journals Application of RCO Treatment on Automobile Coating Drying Waste Gas

2020 ◽  
Vol 3 (3) ◽  
pp. 83
Author(s):  
Shu li Liu
Keyword(s):  
Production Process ◽  
Organic Compounds ◽  
New Technology ◽  
Gas Treatment ◽  
Automobile Manufacturing ◽  
Waste Gas ◽  
Volatile Organic ◽  
Waste Gas Treatment ◽  
Normal Production ◽  
Treatment Application

With the increasingly serious environmental problems, China has adopted more and more strict industrial production emission policies. Haze pollutes the weather and limits the production of polluting enterprises have seriously affected the normal production process of the factory. The pollutants discharged in automobile manufacturing process are increasing, and the environmental pollution caused by automobile coating needs to be solved urgently. Because a large amount of solvent-based paint is used in the production process, the pollution caused by volatile organic compounds is difficult to avoid. RCO is a new technology in the field of automobile coating waste gas treatment. Application of RCO in automobile coating waste gas treatment is studied.

The Research on Preparation Methods of Sludge-Based Adsorbent and its Application in Water Treatment

2013 ◽  
Vol 798-799 ◽  
pp. 1166-1169 ◽  
Author(s):  
Kun Huang ◽  
Bing Xin Du
Keyword(s):  
Sustainable Development ◽  
Sewage Sludge ◽  
Preparation Method ◽  
Research Direction ◽  
Excess Sludge ◽  
Preparation Methods ◽  
Gas Treatment ◽  
Waste Gas ◽  
Waste Gas Treatment ◽  
Process Of Urbanization

The accelerated process of urbanization and industrialization leads to the increase of sewage sludge production. The reuse of excess sludge which meets the idea of sustainable development is aimed to develop it into resources. Preparation of sludge-based adsorbents with various functions provides a new way for sludge utilization as a resource in China. The preparation method of sludge-based adsorbents and its application in wastewater and waste gas treatment are introduced. Suggestions about the research direction of sludge-based adsorbents in the future are point out.

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