Variability of nutrients content during co-digestion process of sewage sludge and brewery spent grain

2021 ◽  
pp. 107-114
Author(s):  
M. Lebiocka
Keyword(s):  
Sewage Sludge ◽  
Digestion Process ◽  
Spent Grain

Anaerobic digestion of co-mingled municipal solid waste and sewage sludge

1998 ◽  
Vol 38 (2) ◽  
pp. 127-132 ◽  
Author(s):  
N. Hamzawi ◽  
K. J. Kennedy ◽  
D. D. McLean
Keyword(s):  
Sewage Sludge ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Biogas Production ◽  
Empirical Models ◽  
Organic Fraction ◽  
Primary Sludge ◽  
Digestion Process ◽  
Solids Concentration ◽  
Anaerobic Biodegradability

This study evaluated the technical feasibility of the anaerobic co-digestion process in the context of typical North American solid waste. Using biological activity tests, an optimal mixture was identified with 25% organic fraction of municipal solid waste (OFMSW) and 75% sewage sludge (65% raw primary sludge (RAW), 35% thickened WAS (TWAS)) based on biogas production. Also, based on the rate of biogas production, the most anaerobically biodegradable components of the OFMSW were paper and grass. The TWAS and the newspaper were found to be the least biodegradable components. Lab-scale testing indicated that alkaline pretreatment increased the biodegradability of the sewage sludge/OFMSW mixture the most, as compared to the untreated control. Thermochemically pretreated feedstocks inhibited anaerobic biodegradability as compared to the control, whereas the anaerobic biodegradability of thermally pretreated feed was not found to be significantly different from that of the control. Empirical models were developed based on alkaline dose, feed total solids concentration and particle size for biogas production and removal of TS and VS. All three experimental factors were found to be significant with respect to the response variables studied.

Fate of nonylphenol polyethoxylates and nonylphenoxy acetic acids in an anaerobic digestion process for sewage sludge treatment

2006 ◽  
Vol 53 (11) ◽  
pp. 221-226 ◽  
Author(s):  
M. Minamiyama ◽  
S. Ochi ◽  
Y. Suzuki
Keyword(s):  
Wastewater Treatment ◽  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
Treatment Process ◽  
Sludge Treatment ◽  
Testing Apparatus ◽  
Anaerobic Digestion Process ◽  
Digestion Process ◽  
Sewage Sludge Treatment ◽  
Acetic Acids

Many environmental problems caused by endocrine disruptors (EDs) have been reported. It is reported that EDs flow into sewage treatment plants, and it has been pointed out that these may be shifted from the wastewater treatment process to the sludge treatment process. Little is known about the fate of EDs accumulated in sewage sludge, so we carried out a study to clarify the fate of EDs in sewage sludge treatment processes, especially in an anaerobic digestion process. In this study, nonylphenol (NP) was selected as a target ED. Nonylphenol ethoxylates (NPnEO) or nonylphenoxy acetic acids (NPnEC), which were the precursor of NP, were added to an anaerobic digestion process, and mass balance was investigated. The following results were obtained from the anaerobic digestion experiments. (1) NP1EO was injected to an anaerobic digestion testing apparatus that was operated at a retention time of approximately 28 d and a temperature of 35 °C with thickened sludge sampled from an actual wastewater treatment plant. Approximately 40% of the injected NP1EO was converted to NP. (2) NP1EC was injected to an anaerobic digestion testing apparatus with thickened sludge. As a result, almost all injected NP1EC was converted to NP. When NP2EC was injected, NP2EC was not converted to NP until the 20th day.

scholarly journals Modelling and Multi-Criteria Analysis of Anaerobic Digestion Process to Get Upgraded Methane from Bio-Residues in the City of Reykjavik

Proceedings ◽  
2019 ◽  
Vol 30 (1) ◽  
pp. 46
Author(s):  
Finger ◽  
Stepanovic ◽  
Llano
Keyword(s):  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
Food Waste ◽  
Organic Waste ◽  
Waste Treatment ◽  
Action Plan ◽  
Digestion Process ◽  
Climate Action ◽  
Climate Action Plan ◽  
The City

Anaerobic digestion of urban organic wastes, farming slurries or sewage sludge is a common practice in waste treatment plants. In the city of Reykjavik, the organic waste fraction constituted by 60% of biomass and 40% of food waste will be transformed by the local waste company SORPA providing biofuel for up to 10% of the cars. Such measures belong to the 2018-2030 Climate Action Plan from the Icelandic Government.

Grease waste and sewage sludge co-digestion enhancement by thermal hydrolysis: batch and fed-batch assays

2014 ◽  
Vol 69 (9) ◽  
pp. 1911-1918 ◽  
Author(s):  
R. Cano ◽  
A. Nielfa ◽  
A. Pérez ◽  
L. Bouchy ◽  
M. Fdz-Polanco
Keyword(s):  
Sewage Sludge ◽  
Methane Production ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Waste Water Treatment Plant ◽  
Thermal Hydrolysis ◽  
Fed Batch ◽  
Digestion Process ◽  
Biological Sludge ◽  
Methane Potential

Grease waste (GW) is an adequate substrate for sewage sludge co-digestion since, coming from a waste water treatment plant, it has a high methane potential (489 NmLCH4/gVSin); however, no synergistic effect takes place when co-digesting with 52%VS grease. Conversely, thermal hydrolysis (TH) improves the anaerobic digestion of GW (43% higher kinetics) and biological sludge (29% more methane potential). Therefore, the application of TH to a co-digestion process was further studied. First, biochemical methane potential tests showed that the best configuration to implement the TH to the co-digestion process is pretreating the biological sludge alone, providing a 7.5% higher methane production (398 NmLCH4/gVSin), 20% faster kinetics and no lag-phase. Its implementation in a fed-batch operation resulted in considerable methane production (363 NmLCH4/gVSin) and TH improved the rheology and dewaterability properties of the digestate. This leads to important economical savings when combined with co-digestion, reducing final waste management costs and showing interesting potential for full-scale application.

scholarly journals A combined anaerobic digestion system for energetic brewery spent grain application in co-digestion with a sewage sludge

2021 ◽  
Vol 135 ◽  
pp. 448-456
Author(s):  
Aleksandra Szaja ◽  
Agnieszka Montusiewicz ◽  
Magdalena Lebiocka ◽  
Marta Bis
Keyword(s):  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
Spent Grain

Influence of Pretreatment on Anaerobic Stabilisation of Sewage Sludge

1984 ◽  
Vol 16 (12) ◽  
pp. 365-373 ◽  
Author(s):  
F Wechs
Keyword(s):  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
Short Term ◽  
Digested Sludge ◽  
Digestion Process ◽  
Reference Process ◽  
Stage Process ◽  
Rate Limiting ◽  
Hydrolysis Of ◽  
Pretreatment Processes

In order to intensify anaerobic stabilisation of sewage sludge, several pretreatment processes have been tested. Pretreatment processes investigated are: prepasteurisation, separate acidification, short-term anaerobic digestion. Anaerobic stabilisation was performed in 500 1 digestors. All experiments were performed in parallel to a process operated with untreated raw sludge, the later serving as a reference process. Prepasteurisation turned out to improve solids degradation and dewaterability of the digested sludge, whereas acidification was found to be a rather slow and uncomplete process due to the rate limiting function of hydrolysis of sludge particulates. Using a short-term anaerobic digestion process before anaerobic stabilisation, the easily degradable organics were readily converted to methane. It was shown that this two-stage process improves stabilisation efficiency in comparison to a 20 day one-stage process very significantly.

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