Effect of Cross-Linking Waste Protein with Diepoxides on its Biodegradation under Anaerobic Conditions
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Biodegradability testing was performed in an aqueous environment under anaerobic conditions after inoculation with digested sludge from municipal wastewater treatment plant. In cross-linking with 1,2:3,4-diepoxybutane in limits 0.8–9.1% weight, biodegradability degree decreased from 76.8 to 62.2%; when 1,2:7,8 diepoxyoctane in quantities 1.1–13.2% weight was used, biodegradability degree dropped more prominently – from 72.3 to 22.8%. There is obviously a direct connection between growing cross-link degree (assessed by so-called fixation index) and decreasing readiness to biodegradation, apparently owing to build-up of a network forming an obstacle to access of micro-organisms and enzymes.
KeywordsBiodegradation Anaerobic Cross-linking Proteins Hydrolyzate Diepoxides
This work was accomplished with financial support for research by Research Projects of the Ministry of Youth, Education and Sports of the Czech Republic, No. 7088352101.
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