Treatment of the biodegradable fraction of used disposable diapers by co-digestion with waste activated sludge

Torrijos, Michel; Sousbie, Philippe; Rouez, Maxime; Lemunier, M.; Lessard, Y.; Galtier, L.; Simao, A.; Steyer, Jean‐Philippe

doi:10.1016/j.wasman.2013.11.009

Cited by 35 publications

(16 citation statements)

References 14 publications

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“…Interestingly, WDD contain nearly 35% of cellulose, which is degradable under biological conditions (i.e. anaerobic degradation and composting). Other components of WDD are plastic materials, notably polyethylene, polypropylene and a super water‐absorbent sodium polyacrylate (SPA); on a dry basis, diapers contain c .…”

Section: Introductionmentioning

confidence: 99%

“…Previous research on biological treatment of WDD includes dark fermentation (DF), anaerobic digestion, composting and fungal treatment . Work on DF of WDD is relatively scarce.…”

Section: Introductionmentioning

confidence: 99%

“…Research on anaerobic digestion of WDD also is scarce. Torrijos et al, co‐digested the organic fraction of diapers (just the cellulosic fraction with no SPA nor plastics) along with waste‐activated sludge. They observed a moderate methane yield of 0.280 NLCH 4 g VS –1 fed, and an electrical energy potential of 130 kW t –1 WDD was estimated from the biochemical methane potential experiments.…”

Section: Introductionmentioning

confidence: 99%

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Sodium polyacrylate inhibits fermentative hydrogen production from waste diaper‐like material

Sotelo-Navarro

Poggi‐Varaldo

Turpin-Marion

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: The inhibitory effect of a moisture-absorbent sodium polyacrylate (SPA), that is commonly used in disposable diapers, on the bio-hydrogen (H 2 ) generation from waste diaper-like material (WDM) was assessed in dark fermentation studies. Three types of treatments were evaluated in batch bioreactors at 37 ∘ C: mixture of bond paper and filter paper (WDM, no SPA), SPA alone (only SPA or control), and WDM spiked with SPA [paper plus sodium polyacrylate hydrogel (WDM-SPA)]. The WDM simulated the cellulosic fraction of diaper composition. RESULTS:The units with only SPA did not produce H 2 . The WDM-SPA units exhibited H 2 production 25% lower than those of bioreactors loaded with only WDM but no SPA. Cumulative H 2 production was 0.03, 4.22 and 5.50 mmolH 2 g TS -1 for the SPA, WDM-SPA and WDM reactors, respectively (0.04, 5.90 and 8.77 mmolH 2 g VS -1 ; 0.89, 132.19 and 196.45 NmLH 2 g VS -1 ). BioH 2 generation was related to predominance of the fermentation route that produces 1 mol L -1 of butyric acid (HBu) plus 2 mol L -1 H 2 in the WDM and WDM-SPA units, as suggested by the ratio A:B (acetic: butyric acids; A:B < 0.79 mg HAc-COD mg HBu-COD -1 in both cases).CONCLUSION: It seems that this is the first documented result on the inhibitory effect of SPA on the bioH2 fermentation of cellulosic wastes. However, further research should be carried out at different levels of SPA to determine, for instance, the half-inhibition value of SPA, that is, the concentration of SPA that would cause a 50% drop in H 2 generation of the non-SPA treatment.

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Section: Introductionmentioning

confidence: 99%

“…Previous research on biological treatment of WDD includes dark fermentation (DF), anaerobic digestion, composting and fungal treatment . Work on DF of WDD is relatively scarce.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Sodium polyacrylate inhibits fermentative hydrogen production from waste diaper‐like material

Sotelo-Navarro

Poggi‐Varaldo

Turpin-Marion

et al. 2019

J of Chemical Tech & Biotech

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“…Currently, diaper waste is collected in waste bags and transported to the nearest resource-recovery facilities, where it is buried or incinerated without going through the process of separation [4]. Diaper waste is disposed of on a daily basis and its environmental impacts include land use, methane production and the leaching of organic compounds into the soil and groundwater [8][9][10][11]. In 2011, Deloitte conducted a study comparing the environmental performance of Knowaste's Absorbent Hygiene Products (hereafter, AHP) recycling process to the standard UK disposal practice-namely, controlled landfill or incineration with energy recovery.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of a Disposable-Diaper Collection Trial in Korea through Comparison with an Absorbent-Hygiene-Product Collection Trial in Scotland

Kim

2018

Sustainability

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This study was designed to analyze the feasibility of economic aspects assuming that the policy of diaper recycling is necessary. With respect to economic feasibility, the collection and transportation of the diaper waste, which accounts for much of the cost, need to be optimized. Starting with the results of a collection trial in Scotland (2012), the method used in a collection trial in Korea (2014) was analyzed to identify problems incurring additional costs. This paper targeted daycare centers in Nowon-Gu, Seoul-because of the quantity of waste diapers they produce and the efficiency of collection-to identify the problems and to predict the cost of collection. This study evaluated multiple scenarios in light of their collection costs, discovering factors that could improve the system and reduce the cost and created the most economically feasible and optimized collection model. This paper will serve as empirical evidence proving the economics of diaper collection when the regulation is revised or amended in the future.

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“…At present, used diapers are generally not collected separately and are disposed of as solid municipal waste for further treatment, mainly by incineration, land filling [11,12] and, to a lesser degree, by composting [13] or anaerobic digestion [14]. Waste recycling is an important aspect of environment sustainability, on the other hand, minimizes waste products placed in landfills, promotes recovery of materials that can be reused in new productive cycles, prevents energy usage and consumption of fresh raw materials and allows to preserve natural resources and the environment for future generations.…”

Section: Introductionmentioning

confidence: 99%

Valorization of Superabsorbent Polymers from Used Disposable Diapers as Soil Moisture Conditioner

Orozco¹,

Timoteo-Cruz²,

Torres-Blancas³

et al. 2017

Preprint

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This study was conducted to explore the potential of superabsorbent polymers (SAPs) from used disposable diapers as soil moisture conditioner. Swelling behavior of the proposed hydrogel in response to external stimuli such as salt solutions, temperature and pH was studied. In addition, laboratory experiments were carried out to evaluate the effects of incorporation hydrogel on germination of bean (Phaseolus vulgaris L.) and pumpkin (C. pepo) seeds. The structure of the superabsorbent was characterized by Fourier transform infrared spectroscopy (FTIR). The results indicate that the proposed SAP exhibited a maximum swelling capacity of 189 g⋅g -1 of dry gel. It was observed that the swelling capacity decreased with an increase in the ionic strength of the swelling medium. When this SAP was mixed with sandy soil, the mixture was able to lose water more slowly. The seeds germination and seedling growth was remarkably influenced by the application of 0.5, 1.0 and 2.0 w/w% of SAP compared to the untreated soil. Therefore, it follows that it is possible to take advantage of SAPs property from used disposable diapers to retain the moisture in soil as an alternative to value the use of such waste, showing that it has potential for diverse applications in agriculture.

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Treatment of the biodegradable fraction of used disposable diapers by co-digestion with waste activated sludge

Cited by 35 publications

References 14 publications

Sodium polyacrylate inhibits fermentative hydrogen production from waste diaper‐like material

Sodium polyacrylate inhibits fermentative hydrogen production from waste diaper‐like material

Evaluation of a Disposable-Diaper Collection Trial in Korea through Comparison with an Absorbent-Hygiene-Product Collection Trial in Scotland

Valorization of Superabsorbent Polymers from Used Disposable Diapers as Soil Moisture Conditioner

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