Optimisation of microwave conditioning process for enhanced sludge valorisation

Beszédes Sándor; Szabó Gábor; Hodúr Cecília: Optimisation of microwave conditioning process for enhanced sludge valorisation. (2012) [Prezentáció]

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Angol cím

Optimisation of microwave conditioning process for enhanced sludge valorisation

Angol nyelvű abstract, leírás

Sludge produced from food industry wastewater contains organic matters in a high concentration but additional components such as detergents, disinfectants and other macromolecules and ions originating from wastewater purification processes have unfavorably effect on biodegradability of sludge. Microwave irradiation is considered as intensive method for pasteurization and also provides fast thermal technology to convert organic matters into more soluble form and helps to disrupt the resistant polymeric structure of sludge. Beside the many verified beneficial effect of microwave technique on sludge structure conflicting results can be found in the scientific studies. In our study was focused on to define appropriate process and control parameters for microwave sludge conditioning methods which are suitable to optimize the microwave operation and also could provide facility to develop continuously-flow microwave conditioning equipments for food industry sludge. During our work novel indicators, the solubilization index and biodegradation index were developed to control the efficacy of microwave process. Our experimental results confirmed that beside the irradiation time and frequency the specific microwave power level (MWPL) has also effect on the biodegradability of food industry wastewater sludge. Results of response surface analysis show that increment of biodegradability was limited. Over the optimum value of irradiated energy or higher intensity of MW treatment BDI was decreased, and the energy balance of the subsequent anaerobic digestion process was also worsened.

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