Effect of hydraulic retention time on anaerobic co-digestion of cattle manure and food waste

Bi, Shaojie; Hong, Xiujie; Yang, Hongzhi; Yu, Xinhui; Fang, Shumei; Bi, Yan; Liu, Jinli; Gao, Yamei; Yan, Lei; Wei-dong, Wang; Wang, Yanjie

doi:10.1016/j.renene.2019.12.091

Cited by 82 publications

(26 citation statements)

References 39 publications

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“…Moreover, the AnMBR system treating FW slurry or meat-processing wastewater were able to achieve a HRT of 1 day, but the OLR was also lower at 1.014 (± 0.066) g COD/L.d (Moñino et al, 2017 ) or 3.2 g COD/L.d (Galib et al, 2016 ), respectively. Similar methane yields and COD removal efficiencies at high OLR have thus far only achieved at relatively higher HRT of 5–15 days with the most used one-stage or two-stage CSTR systems (Paudel et al, 2017 ; Bi et al, 2020 ).…”

Section: Discussionmentioning

confidence: 83%

Performance of AnMBR in Treatment of Post-consumer Food Waste: Effect of Hydraulic Retention Time and Organic Loading Rate on Biogas Production and Membrane Fouling

Ariunbaatar

Bair

Özcan

et al. 2021

Front. Bioeng. Biotechnol.

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Anaerobic digestion of food waste (FW) is typically limited to large reactors due to high hydraulic retention times (HRTs). Technologies such as anaerobic membrane reactors (AnMBRs) can perform anaerobic digestion at lower HRTs while maintaining high chemical oxygen demand (COD) removal efficiencies. This study evaluated the effect of HRT and organic loading rate (OLR) on the stability and performance of a side-stream AnMBR in treating diluted fresh food waste (FW). The reactor was fed with synthetic FW at an influent concentration of 8.24 (± 0.12) g COD/L. The OLR was increased by reducing the HRT from 20 to 1 d. The AnMBR obtained an overall removal efficiency of >97 and >98% of the influent COD and total suspended solids (TSS), respectively, throughout the course of operation. The biological process was able to convert 76% of the influent COD into biogas with 70% methane content, while the cake layer formed on the membrane gave an additional COD removal of 7%. Total ammoniacal nitrogen (TAN) and total nitrogen (TN) concentrations were found to be higher in the bioreactor than in the influent, and average overall removal efficiencies of 17.3 (± 5) and 61.5 (± 3)% of TAN and TN, respectively, were observed with respect to the bioreactor concentrations after 2 weeks. Total phosphorus (TP) had an average removal efficiency of 40.39 (± 5)% with respect to the influent. Membrane fouling was observed when the HRT was decreased from 7 to 5 d and was alleviated through backwashing. This study suggests that the side-stream AnMBR can be used to successfully reduce the typical HRT of wet anaerobic food waste (solids content 7%) digesters from 20 days to 1 day, while maintaining a high COD removal efficiency and biogas production.

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Section: Discussionmentioning

confidence: 83%

Performance of AnMBR in Treatment of Post-consumer Food Waste: Effect of Hydraulic Retention Time and Organic Loading Rate on Biogas Production and Membrane Fouling

Ariunbaatar

Bair

Özcan

et al. 2021

Front. Bioeng. Biotechnol.

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“…Indeed, the REtvs decreased by 13.63%. On the contrary, the methane production rate (MPR, NlCH4 L -1 d -1 ) increased by 30.54% showing a CH4 yield higher than those achieved shorting the HRT from 25 days to 5 days and using cattle manure and food waste as substrate [12]. Fig.…”

Section: Biogas Productionmentioning

confidence: 90%

“…For example, a TVS removal efficiency of 74.8% was reached in a digester operating in mesophilic conditions [11]. On the contrary, in the codigestion of food-waste and cattle manure, an HRT of 5 days leaded to the highest CH4 production while an HRT of 15 days showed the maximum CH4 yield [12].…”

Section: Introductionmentioning

confidence: 97%

Energy recovery from biowaste: influence of hydraulic retention time on biogas production in dry-anaerobic digestion

Rossi¹,

Pecorini²,

Iannelli³

2021

E3S Web Conf.

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The hydraulic retention time (HRT) is a key parameter in dry-anaerobic digestion to set during the reactor configuration in order to achieve the optimal biogas production. For this reason, the study compared the results of two experimental tests operating with an HRT of 23 and 14 days. During the tests, the feedstock was organic fraction of municipal solid waste with a solid content of 33% and the digester was a pilot-scale plug-flow reactor operating in thermophilic condition. The highest specific biogas production of 311.91 Nlbiogas kg-1 d-1 was achieved when the HRT was set to 23 days. On the contrary, the highest methane production rate of 1.43 NlCH4 l-1 d-1 was achieved for an HRT of 14 days. In addition, the volatile solids removal (49.15% on average) and the energy content o(4.8 MJ kg-1 on average) were higher for HRT 23 days than for HRT14 days. The results indicated that in dry-anaerobic digestion of organic fraction of municipal solid waste, 23 days is a suitable HRT for energy recovery.

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“…Thereafter, when it comes to the technical side, the volume of biogas and methane yields produced from each feedstock were monitored under a stable OLR of 2 kg VS/m 3 .d, including the mono-digested FW which was considered as a blank test or a reference to determine the impact of additional co-substrates. Table 3 ascertained the positive effect of the adjusted C:N ratio for all the mixtures on the biogas productivity and outlined more particularly the significant enhancement owing to CM addition [53]. However, even though all the co-digested mixtures were characterized by an initial C:N ratio within the optimal range for a performant AD progress, the nature of the introduced co-substrates played a critical role in terms of process efficiency [26].…”

Section: Effect Of Co-substrate Addition On Start-up Conditions Of Fw-ad Under a Stable Olrmentioning

confidence: 99%

Effects of co-substrates’ mixing ratios and loading rate variations on food and agricultural wastes’ anaerobic co-digestion performance

Chaher

Engler

Nassour

et al. 2021

Biomass Conv. Bioref.

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Tunisia is one of the developing countries which faces crucial challenges, the most prominent of which are the production of organic waste, the need for an appropriate waste treatment, and the demand for water and energy conservation. To this end, the present research was designed to develop a technical concept on closed cycle “biowaste to bioenergy” treating food waste (FW) through combined biological processes. In this approach, semi-continuous anaerobic co-digestion (ACoD) of FW, wheat straw (WS), and cattle manure (CM) was tested to investigate the relationship between the effect of the feedstock mixtures and C:N ratio on biogas and digestate generation at different organic loading rates (OLRs) ranging from 2 to 3.6 kg VS/m3.d. Results showed that the mono-digested FW was optimal and reached 565.5 LN/kg VSin at an OLR of 2.4 kg VS/m3.d, and then a drop of biogas production was recorded. However, for co-digested substrates, the optimum mixture ratio was FW:CM 75:25, where 62%, 39.89%, 91.26%, 130.9%, and 119.97% of the biogas yield improved for OLRs ranging from 2 to 3.6 kg VS/m3.d, respectively. Admittedly, the target of this work was to enhance the ACoD process, but it also examined the exploitation of different AD effluents. Therefore, special attention was paid to the generated digestates to decide how it can be efficiently upcycled later. Thus, the closed cycle “biowaste to bioenergy” treatment met two of the major Tunisian concerns: efficient organic waste management and sustainable bioenergy production.

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Effect of hydraulic retention time on anaerobic co-digestion of cattle manure and food waste

Cited by 82 publications

References 39 publications

Performance of AnMBR in Treatment of Post-consumer Food Waste: Effect of Hydraulic Retention Time and Organic Loading Rate on Biogas Production and Membrane Fouling

Performance of AnMBR in Treatment of Post-consumer Food Waste: Effect of Hydraulic Retention Time and Organic Loading Rate on Biogas Production and Membrane Fouling

Energy recovery from biowaste: influence of hydraulic retention time on biogas production in dry-anaerobic digestion

Effects of co-substrates’ mixing ratios and loading rate variations on food and agricultural wastes’ anaerobic co-digestion performance

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