Hydrogen sulfide formation control and microbial competition in batch anaerobic digestion of slaughterhouse wastewater sludge: Effect of initial sludge pH

Li, Yan; Ye, Jie; Zhang, Panyue; Xu, Dong; Wu, Yan; Li, Jianbo; Zhang, Haibo; Fang, Wei; Wang, Bei; Zeng, Guangming

doi:10.1016/j.biortech.2018.03.011

Cited by 112 publications

(41 citation statements)

References 41 publications

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“…Not only the feedstock but also the pH seemed very important in influencing the process of anaerobic digestion. Indeed, the rise of the initial sludge pH from 6.5 to 8.0 inhibited the competition of SRBs with methanogens, and thus promoted the growth of methanogens and the biogas production 29 . Nowadays, there are many physical-chemical and biotechnological technologies for the removal of H 2 S from biogas 13,30,31 .…”

Section: Discussionmentioning

confidence: 99%

Molybdate to prevent the formation of sulfide during the process of biogas production

Tenti

Roman

Storelli

2019

Preprint

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The process of anaerobic digestion producing biogas is an eco-friendly energy source that promotes recycling from waste biomass such as food chain residues, wet waste, wastewater. In this study, we focused on the problem of the sulfide (H2S) produced by the sulfate-reducing bacteria (SRB) in the presence of sulfate residues. This byproduct is dangerous for human health and an issue due to the highly corrosive effect on metallic components. To this purpose, the Molybdate, a sulfate analog, known in the literature to inhibit SRBs by blocking the first enzyme of the metabolic pathway of anaerobic respiration, was applied. The experiments carried out showed that a concentration of 0.3 mM of molybdate was enough to inhibit the SRB in a complex environment of the anaerobically digested sludge (ADS) took from a real biogas producing bioreactor. During the study, we observed the importance of the sulfate concentration sulfate in the system. Indeed, the production of sulfide was stopped only under the threshold ratio value of 1:10 (molybdate: sulfate). In the short term, the addition of molybdate did not alter the production and quality (% of methane) of the biogas, nor the anaerobic microbial community, including SRB population itself.

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Section: Discussionmentioning

confidence: 99%

Molybdate to prevent the formation of sulfide during the process of biogas production

Tenti

Roman

Storelli

2019

Preprint

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“…There was a clear adverse association among H 2 S level and pH in the cattle rumen when the cows provided a total mix ration with sulfur 0.45 percent, and the reduction in sulfide to H 2 S can be encouraged when the value of pH in rumen decreases [45]. Higher pH helps to decrease the production of H 2 S by dropping the activity of SRB in batch anaerobic digestion of wastewater sludge in the slaughterhouse; however, till today, there is no investigation conducted on the activity of SRB in the rumen below this pH [52,53]. The finding of the association among the concentration pH of rumen and H 2 S are not similar.…”

Section: Rumen Ph Influences the Production Of Hydrogen Sulfidementioning

confidence: 99%

“…There are many factors which affect the rumen pH that is not associated directly with dietary sulfur levels and rumen pH factors, such as dietary NDF, that affect rumen H 2 S development. [53] reported that the level of H 2 S in rumen reduced linearly with the upsurge in dietary roughage neutral detergent fiber (rNDF) content (4 percent, 7 percent or 10 percent), whether fed with bromegrass hay or cornstalks. Enhancing the supply of hay in the diet from 5% to 12% (DM basis) reduced H 2 S levels by approximately 2000 mg/L; rumen H 2 S level reduced linearly with the upsurge in dietary content of rNDF (p = 0.004), 6 h on Day 14 after providing a total mix ration.…”

Section: Dietary Ndf Content Influences the Production Of Hydrogen Sumentioning

confidence: 99%

Production of Hydrogen Sulfide by Fermentation in Rumen and Its Impact on Health and Production of Animals

Shah

Wang

et al. 2020

Processes

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Hydrogen sulfide is a Janus-faced molecule with many beneficial and toxic effects on the animal health. In ruminants, rumen fermentation plays a vital role in the digestion and absorption of nutrients. During rumen fermentation, the production of hydrogen sulfide can occur, and it can be rapidly absorbed into the body of the animals through the intestinal wall. If the production of hydrogen sulfide concentration is higher in the rumen, it can cause a toxic effect on ruminants known as poliomyelitis. The production of hydrogen sulfide depends on the population of sulfate-reducing bacteria in the rumen. In rodents, H2S maintains the normal physiology of the gastrointestinal tract and also improves the healing of the chronic gastric ulcer. In the gut, H2S regulates physiological functions such as inflammation, ischemia–reperfusion injury and motility. In this review article, we summarize the toxicity occurrence in the body of animals due to high levels of hydrogen sulfide production and also recent progress in the studies of physiological function of H2S in the gut, with a special emphasis on bacteria-derived H2S is discussed in this review.

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“…One study found that rice wash helped to improve the rate of the degradation of carbohydrates, the yield of VFAs, and the acidification in peanut residue during AD [73]. Slaughterhouse wastewater and kitchen wastewater are also effective media for adjusting TSes [74,75].…”

Section: Four Single-factor Experimental Conditions: Temperature Musmentioning

confidence: 99%

Anaerobic Digestion Technology for Methane Production Using Deer Manure Under Different Experimental Conditions

Wang

Sheng

et al. 2019

Energies

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Anaerobic digestion (AD) is an important technology for the treatment of livestock and poultry manure. The optimal experimental conditions were studied, with deer manure as a fermentation material and mushroom residue as an inoculum. At the same time, methane production was increased by adding zeolite and changing the magnetic field conditions. The results showed that a 6% solid content was the best condition for producing methane. The optimal conditions for methane production were obtained by adding 35 g of mushroom residue to 80 g of deer manure at 35 °C. The addition of organic wastewater (OW) improved methane production. The result of improving the methane production factor showed that adding zeolite during the reaction process could increase the methane production rate. When the amount of zeolite was over 8% total solids (TSes), methane production could improve, but the rate decreased. Setting a different magnetic field strength in the AD environment showed that when the distance between the magnetic field and the reactor was 50 mm and the magnetic field strength was 10–50 mT, the methane production increment and the content of methane in the mixed gases increased.

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Hydrogen sulfide formation control and microbial competition in batch anaerobic digestion of slaughterhouse wastewater sludge: Effect of initial sludge pH

Cited by 112 publications

References 41 publications

Molybdate to prevent the formation of sulfide during the process of biogas production

Molybdate to prevent the formation of sulfide during the process of biogas production

Production of Hydrogen Sulfide by Fermentation in Rumen and Its Impact on Health and Production of Animals

Anaerobic Digestion Technology for Methane Production Using Deer Manure Under Different Experimental Conditions

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