in the present study, the increase of organic loading rate (olr) influences the biomethanisation of sewage sludge. the research was conducted at technical scale in wastewater treatment plant in tyrowo (near ostróda, poland). it has been shown that the increase of olr, by adding co-substrates, cause the increase of biogas production but not biogas yield coefficient. the substrates used for anaer...

Anaerobic digestion of dairy cow manure (CM), the organic fraction of municipal solid waste (OFMSW), and cotton gin waste (CGW) was investigated with a two-phase pilot-scale anaerobic digestion (AD) system. The OFMSW and CM were digested as single wastes and as combined wastes. The single waste digestion of CM resulted in 62m3 methane/ton of CM on dry weight basis. The single waste digestion of...

Co-digestion is the simultaneous digestion of two or more substrates and a common practice at wastewater treatment plants (WWTPs). The amounts methane digested sludge produced are key parameters for evaluating economic efficiency co-digestion. However, share dewatered digestate from co-substrates not known. Synergistic effects in co-digestion, i.e. better biodegradability compared to mono-diges...

Introduction The co-digestion of manure with other substrates such as energy crops, industrial wastes, or food industry wastes enhances biogas production. The addition of co-substrates to manure can improve the carbon to nitrogen balance which results in a stable and maintainable digestion process [1]. Co-digestion also improves the flow qualities of the co-digested substrates [2]. Perhaps the ...

Olive mill solid waste (OMSW) is a pollutant waste coming from olive oil elaboration by the two-phase centrifugation system. OMSW has a high organic matter content and unbalanced carbon to nitrogen (C/N) ratio, 31/1, which avoids obtaining high methane yields in the anaerobic digestion of this waste. In the present study a microalgae, Dunaliella salina, was employed as co-substrate for the OMSW...

Anaerobic digestion (AD) is a process by which microorganisms break down biodegradable material in the absence of oxygen. Anaerobic digestion can be used to treat various organic wastes and recover bio-energy in the form of biogas, which consists mainly of CH4 and CO2. A great option for improving yields of anaerobic digestion of solid wastes is the co-digestion of multiple substrates. Numerous...

Anaerobic digestion is a widely employed technique that converts waste into biogas, which can be as renewable energy. To improve its efficiency, but also to treat recalcitrant waste, mixes involving several types of feedstock with different biodegradability rates are fed the process. Finding proper mix difficult and involves extensive, long-lasting experimental work. This paper presents an appr...

Co-digestion is a widely used protocol for biologically stabilizing wastewaters and waste solids that otherwise might be sent to alternative disposal sites such as landfills. The number of applications is growing, within both farm (Frear et al., 2009) and municipal digester (Wallis et al., 2008; Zupancic et al., 2008) applications. In many cases, one of the motivations for practicing co-digesti...

In this study two wet microalgae cultures and one dried microalgae culture were co-digested in different proportions with sewage sludge in mesophilic and thermophilic conditions. The aim was to evaluate if the co-digestion could lead to an increased efficiency of methane production compared to digestion of sewage sludge alone. The results showed that co-digestion with both wet and dried microal...

Fish wastes have great potential as a source of high valued organic carbon for methane production but also have limitation (high content of ammonia nitrogen). Anaerobic treatment of fish wastes is possible with co-digestion. The main issue for co-digestion process lies in balancing several parameters in the co-substrate mixture: macroand micronutrients, C:N ratio, pH, toxic compounds, biodegrad...