Preliminary study of acrylamide monomer decomposition during methane fermentation of dairy waste sludge  

作　　者：Ewelina Mroczek Piotr Konieczny Andrzej Lewicki Agnieszka Waskiewicz Jacek Dach 

机构地区：[1]Department of Food Quality Management, Poznań University of Life Sciences [2]Institute of Biosystems Engineering, Poznań University of Life Sciences [3]Department of Chemistry, Poznań University of Life Sciences

出　　处：《Journal of Environmental Sciences》2016年第7期108-114,共7页环境科学学报（英文版）

基　　金：a result of the realization of the project entitled "Technologies of methane emission reduction from animal production in the context of GHG reduction" financed by the Polish Ministry of Science and Higher Education (contract number: N N313 271338, 2010-13)

摘　　要：Polyacrylamide（PAM） used in sludge dewatering exists widely in high-solid anaerobic digestion. Acrylamide is registered in the list of chemicals demonstrating toxic, carcinogenic and mutagenic properties. Therefore, it is reasonable to ask about the mobility of such residual substances in the environment. The study was carried out to assess the impact of the mesophilic（39 ± 1°C） and thermophilic（54 ± 1°C） fermentation process on the level of acrylamide monomer（AMD） content in the dairy sludge. The material was analysed using high-performance liquid chromatography（HPLC） for quantification of AMD. The results indicate that the process of methane fermentation continues regardless of the temperature effects on the degradation of AMD in dairy sludge. The degree of reduction of acrylamide monomer for thermophilic fermentation is 100%, while for mesophilic fermentation it is91%. In practice, this means that biogas technology eliminates the risk of AMD migration to plant tissue. Moreover, it should be stressed that 90% of cumulative biogas and methane production was reached one week earlier under thermophilic conditions — the dynamics of the methanisation process were over 20% faster.Polyacrylamide（PAM） used in sludge dewatering exists widely in high-solid anaerobic digestion. Acrylamide is registered in the list of chemicals demonstrating toxic, carcinogenic and mutagenic properties. Therefore, it is reasonable to ask about the mobility of such residual substances in the environment. The study was carried out to assess the impact of the mesophilic（39 ± 1°C） and thermophilic（54 ± 1°C） fermentation process on the level of acrylamide monomer（AMD） content in the dairy sludge. The material was analysed using high-performance liquid chromatography（HPLC） for quantification of AMD. The results indicate that the process of methane fermentation continues regardless of the temperature effects on the degradation of AMD in dairy sludge. The degree of reduction of acrylamide monomer for thermophilic fermentation is 100%, while for mesophilic fermentation it is91%. In practice, this means that biogas technology eliminates the risk of AMD migration to plant tissue. Moreover, it should be stressed that 90% of cumulative biogas and methane production was reached one week earlier under thermophilic conditions — the dynamics of the methanisation process were over 20% faster.

关 键 词：Acrylamide monomer Dairy sludge Anaerobic digestion PAM 

分 类 号：X703[环境科学与工程—环境工程] TU991[建筑科学—市政工程]