Emission, dispersion, and potential risk of volatile organic and odorous compounds in the exhaust gas from two sludge thermal drying processes

2022 ◽  
Vol 138 ◽  
pp. 116-124
Author(s):  
Song Xue ◽  
Wenjie Ding ◽  
Lin Li ◽  
Jiawei Ma ◽  
Fengguang Chai ◽  
...  
Keyword(s):  
Potential Risk ◽  
Exhaust Gas ◽  
Volatile Organic ◽  
Thermal Drying ◽  
Odorous Compounds

scholarly journals The use of various species of fungi in biofiltration of air contaminated with odorous volatile organic compounds

2019 ◽  
Vol 100 ◽  
pp. 00021 ◽  
Author(s):  
Milena Gospodarek ◽  
Piotr Rybarczyk ◽  
Anna Brillowska-Dąbrowska ◽  
Jacek Gębicki
Keyword(s):  
Environmental Problem ◽  
Experimental Studies ◽  
Fungal Species ◽  
Biotrickling Filters ◽  
Literature Overview ◽  
Volatile Organic ◽  
Odorous Compounds ◽  
Selection Of Microorganisms ◽  
Selection Of

Air pollution with odorous compounds is a significant social and environmental problem. This paper presents biological deodorization methods. The attention is focused on the application of biotrickling filters for air deodorization. Principles of their operation are discussed, indicating the key role of the selection of microorganisms responsible for the degradation of odorous compounds. A literature overview of the used fungal species is presented and the advantages of using fungi in comparison with bacteria are indicated. The results of experimental studies on the n-butanol removal in biotrickling filter are presented.

scholarly journals Treatment Efficiency by means of a Nonthermal Plasma Combined with Heterogeneous Catalysis of Odoriferous Volatile Organic Compounds Emissions from the Thermal Drying of Landfill Leachates

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Daniel Almarcha ◽  
Manuel Almarcha ◽  
Elena Jimenez-Coloma ◽  
Laura Vidal ◽  
Montserrat Puigcercós ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Carbon ◽  
Total Organic Carbon ◽  
Organic Compounds ◽  
Nonthermal Plasma ◽  
Sulphur Compounds ◽  
Odor Concentration ◽  
Volatile Organic ◽  
Thermal Drying ◽  
Urban Solid Waste

The objective of the present work was to assess the odoriferous volatile organic compounds depuration efficiency of an experimental nonthermal plasma coupled to a catalytic system used for odor abatement of real emissions from a leachate thermal drying plant installed in an urban solid waste landfill. VOC screening was performed by means of HRGC-MS analysis of samples taken at the inlet and at the outlet of the nonthermal plasma system. Odor concentration by means of dynamic olfactometry, total organic carbon, mercaptans, NH3, and H2S were also determined in order to assess the performance of the system throughout several days. Three plasma frequencies (100, 150, and 200 Hz) and two catalyst temperatures (150°C and 50°C) were also tested. Under conditions of maximum capacity of the treatment system, the results show VOC depuration efficiencies around 69%, with average depuration efficiencies between 44 and 95% depending on the chemical family of the substance. Compounds belonging to the following families have been detected in the samples: organic acids, alcohols, ketones, aldehydes, pyrazines, and reduced sulphur compounds, among others. Average total organic carbon removal efficiency was 88%, while NH3and H2S removal efficiencies were 88% and 87%, respectively, and odor concentration abatement was 78%.

Elimination of NH3 and odor from composting by biotrickling filter and preliminary exploration on molecular biology

2011 ◽  
Vol 63 (4) ◽  
pp. 747-753 ◽  
Author(s):  
Niantao Xue ◽  
Qunhui Wang ◽  
Chuanfu Wu ◽  
Peng Zhao ◽  
Weimin Xie
Keyword(s):  
Gel Electrophoresis ◽  
Denaturing Gradient Gel Electrophoresis ◽  
Biotrickling Filter ◽  
Ammonia Oxidizing Bacteria ◽  
Exhaust Gas ◽  
Chain Reaction ◽  
Volatile Organic ◽  
Nitrite Oxidizing Bacteria ◽  
Gradient Gel Electrophoresis ◽  
Polymerase Chain

A biotrickling filter was focused on treatment of odorous NH3 gas, along with volatile organic compounds (VOCs) and other odorous gases during cattle manure composting. The biotrickling filter could treat NH3, the main composition, with removal efficiencies of close to 100% because NH4+ was bio-oxidized in the biofilm to NO3− resulting final NO3− concentrations of about 1000 mg/L. Results of polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE) revealed that ammonia-oxidizing bacteria, Nitrosospira sp, and nitrite-oxidizing bacteria, Nitrococcus mobilis, coexisted in the biofilm. There were 23 kinds of VOCs detected in the exhaust gas. A significant observation was that the biofilm itself of the biotrickling biofilter released VOCs. The odor concentrations of inlet and outlet gases were 1425 and 110, respectively, with removal efficiency of 92.2%, suggesting that the biotrickling filter was effective for treatment of odorous gases during composting.

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.

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