Co-digestion of food waste in a municipal wastewater treatment plant: Comparison of batch tests and full-scale experiences

Koch, Konrad; Plabst, M.; Schmidt, Andreas; Helmreich, Brigitte; Drewes, Jörg E.

doi:10.1016/j.wasman.2015.04.022

Cited by 125 publications

(60 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…a 40% (COD-based) with MSW. Similarly, Koch et al (2016) reported that the self-generated energy at the DWWTP Garching/Alz (Germany, 30,000 p.e.) increased from 25% up to 78% when adding 10% food waste (mass-based) and substituting the old combustion heat and power units.…”

Section: Resource Recovery For a Circular Economymentioning

confidence: 83%

“…increased from 25% up to 78% when adding 10% food waste (mass-based) and substituting the old combustion heat and power units. The authors also estimated that the DWWTP could be self-sufficient if the food dose was increased to 16% (Koch et al, 2016). However, the feasibility of using MSW (even sorted) as co-substrate is dependent on the implementation and operational costs of the MSW conditioning (removal of undesired materials and particle size reduction).…”

Section: Resource Recovery For a Circular Economymentioning

confidence: 99%

See 1 more Smart Citation

Resource Recovery from Wastewater by Biological Technologies: Opportunities, Challenges, and Prospects

et al. 2017

View full text Add to dashboard Cite

Limits in resource availability are driving a change in current societal production systems, changing the focus from residues treatment, such as wastewater treatment, toward resource recovery. Biotechnological processes offer an economic and versatile way to concentrate and transform resources from waste/wastewater into valuable products, which is a prerequisite for the technological development of a cradle-to-cradle bio-based economy. This review identifies emerging technologies that enable resource recovery across the wastewater treatment cycle. As such, bioenergy in the form of biohydrogen (by photo and dark fermentation processes) and biogas (during anaerobic digestion processes) have been classic targets, whereby, direct transformation of lipidic biomass into biodiesel also gained attention. This concept is similar to previous biofuel concepts, but more sustainable, as third generation biofuels and other resources can be produced from waste biomass. The production of high value biopolymers (e.g., for bioplastics manufacturing) from organic acids, hydrogen, and methane is another option for carbon recovery. The recovery of carbon and nutrients can be achieved by organic fertilizer production, or single cell protein generation (depending on the source) which may be utilized as feed, feed additives, next generation fertilizers, or even as probiotics. Additionlly, chemical oxidation-reduction and bioelectrochemical systems can recover inorganics or synthesize organic products beyond the natural microbial metabolism. Anticipating the next generation of wastewater treatment plants driven by biological recovery technologies, this review is focused on the generation and re-synthesis of energetic resources and key resources to be recycled as raw materials in a cradle-to-cradle economy concept.

show abstract

Section: Resource Recovery For a Circular Economymentioning

confidence: 83%

Section: Resource Recovery For a Circular Economymentioning

confidence: 99%

Resource Recovery from Wastewater by Biological Technologies: Opportunities, Challenges, and Prospects

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Al adicionar el inóculo a las mezclas de los sustratos, las relaciones C/N disminuyeron debido a la alta concentración de nitrógeno del inóculo. Los valores de la relación C/N obtenidas al adicionar los residuos de alimentos a los lodos de aguas residuales se encuentran dentro del rango que se ha reportado en la literatura, 6 a 15,4 [14,22,23]. Por otro lado, a pesar de que las relaciones C/N de las mezclas se encontraron por fuera del rango propuesto por algunos investigadores como adecuado para la digestión anaerobia (i.e., 20<C/N<30) [24], la adición de los residuos de alimentos a los lodos de aguas residuales aumentó la producción de metano, al incrementar la relación C/N de los lodos; la mayor producción de metano, 0,25LCH 4 /gSVadicionado, se obtuvo para la mezcla LP:RA=30:70, la cual presentó la mayor relación C/N=11,14.…”

Section: Características De Las Mezclas De Lodos Con Residuos De Alimunclassified

Evaluación de la co-digestión anaerobia de lodos de aguas residuales municipales con residuos de alimentos

Guerrero

Jaramillo

Perez

2016

rev.ion

View full text Add to dashboard Cite

ResumenLa digestión anaerobia es un proceso ampliamente utilizado para el tratamiento de los lodos producidos en las plantas de tratamiento de agua residual, debido a sus ventajas técnicas y económicas. Este artículo presenta un estudio en el que se evaluó la co-digestión de lodos de aguas residuales con residuos de alimentos (RA) como una estrategia para optimizar la digestión de los lodos. Se realizaron mono-digestiones y co-digestiones de los sustratos en condiciones mesofílicas (35°C) usando reactores por lotes. Los lodos utilizados fueron: lodo primario (LP), lodo secundario espesado (LSE) y una mezcla de LP con LSE en la proporción 60:40 con base en sólidos totales (LP:LSE). Las co-digestiones se realizaron usando distintas proporciones de mezclas de los sustratos con base en sólidos volátiles totales: LP:RA=30:70, LP:RA=50:50, LP:RA=70:30 y (LP+LSE):RA=70:30. La máxima producción de metano, 0,25LCH 4 /gSVadicionado, se obtuvo para la mezcla LP:RA=30:70, presentando una producción 32% mayor que la obtenida en la mono-digestión del lodo primario. Palabras clave: co-digestión, producción de metano, lodo primario, lodo secundario espesado, residuos de alimentos. AbstractAnaerobic digestion is a process widely used for the treatment of sludge generated during wastewater treatment, due to its technical and economic advantages. This paper presents a study in which the co-digestion of sewage sludge with food waste (FW) was evaluated as a strategy for optimizing the digestion of sludge. Mono-digestions and co-digestions of the substrates were performed under mesophilic conditions (35°C) using batch reactors. The sludge used were: primary sludge (PS), thickened secondary sludge (TSS), and a mixture of PS with TSS in a ratio 60:40 based on total solids (PS:TSS). The co-digestions were performed using different ratios of mixtures of the substrates based on total volatile solids: PS:FW=30:70, PS:FW=50:50, PS:FW=70:30 y (PS+TSS):FW=70:30. The maximum methane yield, 0,25LCH 4 /gVSadded, was obtained for the mixture PS:FW=30:70, showing a yield 32% higher than the one obtained in the mono-digestion of PS.

show abstract

“…Taking under consideration the value of index energy self-sufficiency for Polish WWTP (the ratio of electricity produced at the plant in cogeneration units to the annual electricity demand in the plant) set for 2015 which are equal to 56.7% and 36.6% respectively for medium-sized and large enterprises [1], it becomes important to increase biogas production to increase their share in energy used for the needs of WWTP. It may be done, among others, by co-digestion process, which results in increase of calorific value of substrates entering the anaerobic digester [3]. Another solution is to precede an anaerobic sludge stabilization by a process, which will increase the availability of substrate in the sludge for bacteria carrying out acidogenesis and methanogenesis.…”

Section: Introductionmentioning

confidence: 99%

Intensification of anaerobic digestion efficiency with use of mechanical excess sludge disintegration in the context of increased energy production in wastewater treatment plants

et al. 2017

View full text Add to dashboard Cite

Abstract. The main goal of the study was to evaluate the effects of mechanical sludge disintegration for enhancing full scale anaerobic digestion of municipal sludge. Batch disintegration tests and lab dewatering tests were also performed aiming at determining the release of organic compounds and assessing the impact of disintegration of excess sludge before the fermentation process of mixed sludge on the dewaterability of post-fermented sludge, respectively. In the study a disc disintegrator driven by a motor with a power of 30 kW, revolutions n = 2950 rpm has been used. It was shown that with increase of energy consumed in the disintegration, the increased amounts of organic compounds were released from the sludge. It was also documented that the introduction of the excess sludge disintegration prior to fermentation tank, resulted in a significant increase in biogas production (by an average of 33.9%) and in increase in volatile total solids reduction in the fermented sludge (by an average of 22.7%). Moreover, the obtained results indicate the possibility of obtaining a higher degree of sludge dewatering, which was subjected to anaerobic stabilization with using disintegrated excess sludge.

show abstract

Co-digestion of food waste in a municipal wastewater treatment plant: Comparison of batch tests and full-scale experiences

Cited by 125 publications

References 37 publications

Resource Recovery from Wastewater by Biological Technologies: Opportunities, Challenges, and Prospects

Resource Recovery from Wastewater by Biological Technologies: Opportunities, Challenges, and Prospects

Evaluación de la co-digestión anaerobia de lodos de aguas residuales municipales con residuos de alimentos

Intensification of anaerobic digestion efficiency with use of mechanical excess sludge disintegration in the context of increased energy production in wastewater treatment plants

Contact Info

Product

Resources

About