Sulfate-reducing and methanogenic microbial community responses during anaerobic digestion of tannery effluent

Kibangou, Victoria Alex; Lilly, Mariska; Mpofu, A.B.; Jonge, Nadieh de; Oyekola, Oluwaseun; Welz, Pamela J.

doi:10.1016/j.biortech.2021.126308

Cited by 15 publications

(6 citation statements)

References 44 publications

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“…The curve of treatment CSO4 is of great interest, because the methane production does not seem to be affected by the high sulfate concentration during the first days of the experiment, since it follows the same trend as C0. This further supports that the direct inhibition of methanogenesis by sulfate is minor but causes indirect inhibition by the growth of SRB that outcompete methanogens, resulting in reduced methane production, as aforementioned [38]. After the first 8 days, a sudden dramatic decrease was observed in the daily methane production of CSO4, probably as a result of the inhibition caused by the hydrogen sulfide produced and the antagonistic growth of SRB against the methanogenic cultures.…”

Section: Anaerobic Process Under High Ammonia and Sulfate Concentrati...supporting

confidence: 78%

The Multifunctional Effect of Porous Additives on the Alleviation of Ammonia and Sulfate Co-Inhibition in Anaerobic Digestion

Tzenos,

Kalamaras,

Economou

et al. 2023

Sustainability

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Ammonia and sulfide derived from the reduction of sulfate by the sulfate-reducing bacteria (SRB) are two of the most common inhibitors in anaerobic digestion. Zeolites and bentonites are characterized as porous materials able to adsorb both ammonia and sulfur compounds and seem to be promising candidates as additives in anaerobic digestion to counteract this co-inhibition. In this study, bentonite and zeolite 13X were subjected to alkali modification at different concentrations of NaOH to alter their physicochemical properties, and their effect on the alleviation of ammonia and sulfate co-inhibition in anaerobic digestion of cow manure was examined. The methane production in 13X treatments (13X without NaOH, 13X02-NaOH 0.2 M and 13X1-NaOH 1 M) was elevated by increasing the NaOH concentration in the modification step, resulting in a significance increase by 8.96%, 11.0% and 15.56% in 13X treatments compared to the treatment without additive. Bentonite treatments did not show the same behavior on the toxicity mitigation. The results appear to be influenced by the combined effect of 13X zeolites on the sulfur compounds adsorption and on the increase in pH and Na+ concentration in the batch reactors.

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Section: Anaerobic Process Under High Ammonia and Sulfate Concentrati...supporting

confidence: 78%

The Multifunctional Effect of Porous Additives on the Alleviation of Ammonia and Sulfate Co-Inhibition in Anaerobic Digestion

Tzenos,

Kalamaras,

Economou

et al. 2023

Sustainability

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“…The AS fertilizer at a 500 kg ha -1 rate reduced CH4 emissions by 31.4 g m -2 h -1 and was 25% lower than the 250 kg ha -1 urea rate (Nugroho et al, 1994). Minamikawa et al (2005) and Kibangou et al (2022) stated that N fertilizers containing sulfate (AS) could produce methanogenic bacteria to compete with sulfate-reducing bacteria for hydrogen, thus inhibiting CH4 formation. Meanwhile, without N fertilizer, CH4 emissions were quite high (113.48 kg ha -1 season -1 ).…”

Section: Methane Fluxmentioning

confidence: 99%

Effect of soil tillage and nitrogen fertilizer management on methane emissions from irrigated rice fields in Central Java, Indonesia

Wihardjaka,

Harsanti,

Viandari

et al. 2023

Chil. j. agric. res.

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Rice (Oryza sativa L.) production in the future aims to increase productivity every year with high input technology, including irrigated rice. However, the practices of irrigated rice fields have a high methane (CH4) production potential. Soil tillage could affect CH4 emission conditions. Puddling and flooding through soil tillage create reduction conditions that promote CH4 production by methanogenic bacteria. The objective was to determine the effect of soil tillage and N fertilizer management on CH4 emissions from rice fields with heavytextured soil. The field experiment was arranged in a split-plot design in which soil tillage was the main plot and consisted of maximum tillage and no-tillage. Nitrogen fertilizer management was the split plot and consisted of a control without N, prilled urea broadcasting, prilled urea deep placement, ammonium sulfate (AS) broadcasting, AS deep placement, and tablet urea deep placement. No-tillage could reduce CH4 emissions by 15.58% compared with maximum tillage. However, grain yield for no-tillage was lower than for maximum tillage with 2.73 and 3.68 t ha -1 , respectively. The AS and tablet urea deep placement emitted lower CH4 and grain yield was higher than with other N management practices. The CH4 emissions for AS and tablet urea deep placement was 96 and 97 kg CH4 ha -1 season -1 and grain yield was 3.79 and 4.25 t ha -1 , respectively. The application of fertilizers incorporated into the soil increased rice productivity and mitigated CH4 emissions from rice fields.

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“…These were then stimulated during the aeration of the Eco-flush™ reactor. Kibangou et al [24] observed the presence of bacteria and methanogenic archaea in raw tannery wastewater sampled from a balancing tank. Nonetheless, a good combination of anaerobic, anoxic, and aerobic processes is required for the biological removal of nutrients (N and P) [23].…”

Section: Evaluation Of the Biological Pre-treatment Performancementioning

confidence: 99%

Poultry Slaughterhouse Wastewater Treatment Using an Integrated Biological and Electrocoagulation Treatment System: Process Optimisation Using Response Surface Methodology

et al. 2022

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The feasibility of a biological (EcoflushTM) and/or electrocoagulation (EC) treatment system in removing chemical oxygen demand (COD) and fats, oils, and grease (FOG) from poultry slaughterhouse wastewater (PSW) were studied. The response surface methodology (RSM) was used to identify the optimum operating condition for EC and its integration with EcoflushTM as a pre-treatment for the removal of lipids. The optimum operating conditions were obtained at a pH of 3.05, a current density of 66.9 A/m2, 74-min of treatment time, and without Ecoflush™. These conditions produced a high-quality clarified effluent after 92.4% COD reduction and 99% FOG reduction. The treatment with EcoflushTM only resulted in 85–99% FOG reduction, 20–50% COD reduction, and odourless effluent. However, the combination of both processes (EcoflushTM and EC) did not yield a significant difference (F test, p > 0.05) when compared to the performance of EC alone. Despite the low removal percentages of nitrogen and phosphorus, the present study proved that EC is an effective method for the removal of COD and FOG, rendering an effluent that meets the permissible discharge standards for the City of Cape Town. The novel Ecoflush™ also proved to be very efficient in the removal of FOG from PSW.

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Sulfate-reducing and methanogenic microbial community responses during anaerobic digestion of tannery effluent

Cited by 15 publications

References 44 publications

The Multifunctional Effect of Porous Additives on the Alleviation of Ammonia and Sulfate Co-Inhibition in Anaerobic Digestion

The Multifunctional Effect of Porous Additives on the Alleviation of Ammonia and Sulfate Co-Inhibition in Anaerobic Digestion

Effect of soil tillage and nitrogen fertilizer management on methane emissions from irrigated rice fields in Central Java, Indonesia

Poultry Slaughterhouse Wastewater Treatment Using an Integrated Biological and Electrocoagulation Treatment System: Process Optimisation Using Response Surface Methodology

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