Experimental and modelling studies on a laboratory scale anaerobic bioreactor treating mechanically biologically treated municipal solid waste

Abstract

The performance of an anaerobic bioreactor in treating mechanically biologically treated municipal solid waste was investigated using experimental and modelling techniques. The key parameters measured during the experimental test period included the gas yield, leachate generation and settlement under applied load. Modelling of the anaerobic bioreactor was carried out using the University of Southampton landfill degradation and transport model. The model was used to simulate the actual gas production and settlement. A sensitivity analysis showed that the most influential model parameters are the monod growth rate and moisture. In this case, pH had no effect on the total gas production and waste settlement, and only a small variation in the gas production was observed when the heat transfer coefficient of waste was varied from 20 to 100 kJ/(m d K). The anaerobic bioreactor contained 1.9 kg (dry) of mechanically biologically treated waste producing 10 L of landfill gas over 125 days.

Mechanical pre-treatment for separation of bio-waste from municipal solid waste: case study of district in Latvia

“…Bio-mechanical treatment in European countries is mainly used for reduction of active biomass in the waste [2] or for stabilization of the landfill site [3] by more compacted mass after mechanical shredding. How efficient mechanical pre-treatment technologies are to sort out useful secondary materials was investigated by Meirhofer et al [4], improving sorting schemas with spectral sensors in Austria.…”

Generación y combustión de metano en relleno sanitario: de la cinética química global a la elemental

“…En la Tabla 1 se presenta un listado de estos modelos, la cinética química que emplean y su respectiva formulación. Otra forma para clasificar estos modelos es con base a la forma de adquirir el conocimiento: los modelos empíricos muestran una gran dependencia de las condiciones del sitio a analizar y luego tienen una validez estrictamente local; en el otro extremo, los modelos fundamentales describen el proceso de fermentación por medio de un conjunto de reacciones microbianas que inician con un decremento en la actividad aerobia, seguido de las etapas de la degradación anaerobia, desde hidrólisis hasta metanogénesis, e incluyen la inhibición acida (Lakshmikanthan et al, 2017;Di Trapani et al, 2018), si bien este es el enfoque formal del problema, en la práctica no se cuenta con suficiente respaldo experimental debido a que requieren una gran cantidad de mediciones y un alto nivel de análisis (Kamalan et al, 2011).…”