Several authorshavepointedout theneed to identify theoptimumoperatingconditions (OCs)of autothermal thermophilic aerobic digestion (ATAD). This study proves the hypothesis that the OCs have the potential to substantially improve the energy efficiency and plant capacity of established ATAD systems. As ATAD is a semi-batch process, its energy efficiency has to be optimized via dynamic optimizatio...

• Thermophilic dry digestion of DDS increases methane yield by 6% at 52 °C efficiently converts organic N. is stable high free ammonia levels (2 g/L) Increasing level enriches members the methanogenic family WSA2. Sanitization thermophilic has a positive energy balance. This study investigated possibility to use anaerobic solid dewatered digested sewage sludge (DDS) wastewater treatment plant (...

This paper examines the potential of improving the stability of thermophilic anaerobic digestion of source-sorted organic fraction of municipal solid waste (SS-OFMSW) by adding leachate and compost during inoculation. For this purpose, two stable thermophilic digesters, A (control) and B (with added leachate and compost), were subjected to a sustained substrate shock by doubling the organic loa...

4 ABSTRACT: Anaerobic digestion (AD) of the organic fraction of municipal solid waste (OFMSW) 5 is promoted as an energy source and more recently as a GHG mitigation measure. In this context, AD 6 systems operating at thermophilic temperatures (55-60C) – compared to mesophilic temperatures 7 (35-40C) – have the unique feature of producing hygienic soil conditioners with greater process 8 effici...

Thermophilic anaerobic sludge digestion is a promising process to divert waste to beneficial use, but an important question is the required temperature and holding time to achieve a given degree of pathogen inactivation. In this study, the kinetics of inactivation of Ascaris suum and vaccine strain poliovirus type 1 (PVS-1), selected as indicators for helminth ova and enteric viruses respective...

A distinct succession from a hydrolytic to a hydrogeno- and acetotrophic community was well documented by DGGE (denaturing gradient gel electrophoresis) and dHPLC (denaturing high performance liquid chromatography), and confirmed by qPCR (quantitative PCR) measurements and DNA sequence analyses. We could prove that Methanosarcina thermophila has been the most important key player during the inv...

High utilization of palm oil in Indonesia corresponds to mill effluent (POME). The POME has chemical oxygen demand (COD) up 100.000 mg/L, which can pollute the ecosystem if not adequately treated. One methods manage is anaerobic thermophilic digestion. advantage this method production methane gas a form alternative energy. Substrate concentration affects This preliminary experiment aims evaluat...

In this study, the main aim is to evaluate mixing ratio of co-digestion buffalo manure (BM) and excess sludge (ES) influenced for methane yield digestate dewaterability. Five batch experiments with different BM ES ratios were carried out under thermophilic mesophilic conditions. The increased by 10.1–73.5% conditions 87.9–153.3% conditions, compared mono-anaerobic digestion same Shannon Chao1 i...

In this study a combined anaerobic/aerobic full-scale treatment plant designed for the treatment of the source-separated organic fraction of municipal solid waste (OFMSW) was monitored over a period of one year. During this period, full information was collected about the waste input material, the biogas production, the main rejects and the compost characteristics. The plant includes mechanical...

Ammonia-oxidizing archaea (AOA) within the phylum Thaumarchaeota are the only known aerobic ammonia oxidizers in geothermal environments. Although molecular data indicate the presence of phylogenetically diverse AOA from the Nitrosocaldus clade, group 1.1b and group 1.1a Thaumarchaeota in terrestrial high-temperature habitats, only one enrichment culture of an AOA thriving above 50°C has been r...