Effect of soot formed in result of coal combustion with two types of solid fuel additives on soot – soil bacteria interaction – biodegradation of soot components by soil bacteria

Barbara Kalicka,Monika Bojko,Dariusz Latowski,Monika Olchawa-Pajor,Marek Chyc,M Filipowicz,K Styszko,M Dudek,T Olkuski

doi:10.1051/e3sconf/20161000007

Barbara Kalicka, Monika Bojko + Show 7 more

Open Access

https://doi.org/10.1051/e3sconf/20161000007

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Abstract

During coal combustion soot formation is unwanted. There are many fuel additives used to reduce soot production. In this study toxicity and biodegradation of three types of soot by two soil bacteria strains i.e. Pseudomonas aeruginosa and Bacillus subtilis were compared. Two additives were selected to produce soot samples: (i) commonly used and containing significant quantities of NaCl (40–44%) and copper (Cu-additive), (ii) newly developed without NaCl and with triiron tetraoxide instead of copper (Feadditive). Average number of bacterial colonies was similar when soot produced during combustion without additive and with Feadditive were used. It was about 50% higher than number of colonies when soot formed with Cu-additive was applied. The soot biodegradation was tested by HS-GC-MS analysis. The highest biodegradation level (about 80%) was obtained for samples with P. aeruginosa cultures and Fe-additive soot. It can be concluded that newly developed additive does not increase toxicity of the soot to soil bacteria and will be removed more quickly from the environment.

Highlights

Coal is one of the largest sources of energy, especially for electricity generation, but it is the largest worldwide anthropogenic source of many pollutants emitted to environment during its combustion
All Petri plates shown bacteria colonies when medium with soot UV radiation treated were spread on agar plates (Tab. 3)
Average number of bacterial colonies was similar when soot produced during combustion without additive (UM) and with newly developed additive (Fe-additive) were used

Summary

Introduction

Coal is one of the largest sources of energy, especially for electricity generation, but it is the largest worldwide anthropogenic source of many pollutants emitted to environment during its combustion. The main of these pollutants emitted into the atmosphere are carbon dioxide and soot. Soot is causing a greenhouse effect and circulatory and respiratory system diseases Because it is a mixture containing crystal amorphous carbon (black carbon), polyaromatic hydrocarbons (PAHs), persistence organic radicals [4] or heavy metals [5] it can be primarily associated with proven properties such as mutagenicity and carcinogenicity [2]. Soot reduction constitutes a significant component of air protection programmes as well as the low emission reduction programmers (LERP)

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