A regulating method for reducing nitrogen loss based on enriched ammonia-oxidizing bacteria during composting

Yun, Zhang; Zhao, Yue; Chen, Yanni; Lu, Qian; Li, Mingxiao; Wang, Xueqin; Wei, Yuquan; Xie, Xinglong; Wei, Zimin

doi:10.1016/j.biortech.2016.09.057

Cited by 103 publications

(18 citation statements)

References 34 publications

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“…Food waste contains a high proportion of biodegradable organic compounds and can cause hygienic hazards, odor and ground water pollution from the leaching of pollutants if not properly treated. Composting is viewed as a clean and viable method to circulate organic wastes (Zhang et al ., 2016; Wu et al ., 2017) and is often used to dispose of food waste and achieve nutrient recycling.…”

Section: Introductionmentioning

confidence: 99%

Effect of inoculation with a microbial consortium that degrades organic acids on the composting efficiency of food waste

Song

Zhang

Xia

et al. 2018

Microbial Biotechnology

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SummaryIn order to overcome the excessive acidification problem, a microbial consortium for the degradation of organic acids (MCDOA), which acts synergistically in degrading organic acids, was developed and used as an inoculum to improve the efficiency of food waste composting. MCDOA could eliminate the initial lag phase of the pile temperature rise because of excessive acidification and effectively shorten the composting period. Fluorescence regional integration analysis of the excitation‐emission matrix spectra of dissolved organic matter showed that compared with raw material, in compost with MCDOA inoculation, the percent fluorescence response (P i,n) values of Regions I, II and IV decreased by 95.11%, 94.19% and 87.41%, respectively, and P i,n of Region V increased by 172.57%. The decreased and increased levels were markedly higher than in the two control groups (MgO and K2 HPO 4 treatment, and uninoculated compost). These findings revealed that MCDOA accelerated the degradation of proteinaceous compounds and the formation of complicated humic‐like materials. Bacterial profiles implied that MCDOA could improve the indigenous bacterial community structure and diversities of acetic and propionic acid‐degrading and lignin‐degrading bacteria, which might account for the high composting efficiency and degree of humification of the inoculated compost.

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Section: Introductionmentioning

confidence: 99%

Effect of inoculation with a microbial consortium that degrades organic acids on the composting efficiency of food waste

Song

Zhang

Xia

et al. 2018

Microbial Biotechnology

Self Cite

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show abstract

“…Research studies have been conducted on various physical, chemical, and biological methods that aim to reduce the inhibitory effects of ammonia and increase methane yield [11][12][13][14]. Such techniques include optimization of the C/N ratio or trace elements, pH or temperature control, high volume dilution of water, use of zeolite and biochar, and contact membrane technology [12,[15][16][17]. These mentioned practices quickly provide optimal biogas production, but they can be difficult to implement economically and strategically, and the environmental aspect remains unclear [11,[18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Influence of Aerobic Pretreatment of Poultry Manure on the Biogas Production Process

et al. 2020

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Anaerobic digestion of poultry manure is a potentially-sustainable means of stabilizing this waste while generating biogas. However, technical, and environmental protection challenges remain, including high concentrations of ammonia, low C/N ratios, limited digestibility of bedding, and questions about transformation of nutrients during digestion. This study evaluated the effect of primary biological treatment of poultry manure on the biogas production process and reduction of ammonia emissions. Biogas yield from organic matter content in the aerobic pretreatment groups was 13.96% higher than that of the control group. Biogas production analysis showed that aerobic pretreatment of poultry manure has a positive effect on biogas composition; methane concentration increases by 6.94–7.97% after pretreatment. In comparison with the control group, NH3 emissions after aerobic pretreatment decreased from 3.37% (aerobic pretreatment without biological additives) to 33.89% (aerobic pretreatment with biological additives), depending on treatment method.

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“…During the composting process, organic matter in laying hen manure is continuously catabolized by microorganisms to produce metabolites, and some intermediate products and final products are volatile odor substances [12]. Odor in compost can be divided into four categories: Volatile nitrogen compounds, volatile sulfur compounds, volatile fatty acids, and aromatic compounds [13].…”

Section: Introductionmentioning

confidence: 99%

Effect of Cornstalk Biochar Immobilized Bacteria on Ammonia Reduction in Laying Hen Manure Composting

et al. 2020

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NH3 emission has become one of the key factors for aerobic composting of animal manure. It has been reported that adding microbial agents during aerobic composting can reduce NH3 emissions. However, environmental factors have a considerable influence on the activity and stability of the microbial agent. Therefore, this study used cornstalk biochar as carriers to find out the better biological immobilization method to examine the mitigation ability and mechanism of NH3 production from laying hen manure composting. The results from different immobilized methods showed that NH3 was reduced by 12.43%, 5.53%, 14.57%, and 22.61% in the cornstalk biochar group, free load bacteria group, mixed load bacteria group, and separate load bacteria group, respectively. Under the simulated composting condition, NH3 production was 46.52, 38.14, 39.08, and 30.81 g in the treatment of the control, mixed bacteria, cornstalk biochar, and cornstalk biochar separate load immobilized mixed bacteria, respectively. The cornstalk biochar separate load immobilized mixed bacteria treatment significantly reduced NH3 emission compared with the other treatments (p < 0.05). Compared with the control, adding cornstalk biochar immobilized mixed bacteria significantly decreased the electrical conductivity, water-soluble carbon, total nitrogen loss, and concentration of ammonium nitrogen (p < 0.05), and significantly increased the seed germination rate, total number of microorganisms, and relative abundance of lactic acid bacteria throughout the composting process (p < 0.05). Therefore, the reason for the low NH3 emission might be due not only to the adsorption of the cornstalk biochar but also because of the role of complex bacteria, which increases the relative abundance of lactic acid bacteria and promotes the acid production of lactic acid bacteria to reduce NH3 emissions. This result revealed the potential of using biological immobilization technology to reduce NH3 emissions during laying hen manure composting.

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A regulating method for reducing nitrogen loss based on enriched ammonia-oxidizing bacteria during composting

Cited by 103 publications

References 34 publications

Effect of inoculation with a microbial consortium that degrades organic acids on the composting efficiency of food waste

Effect of inoculation with a microbial consortium that degrades organic acids on the composting efficiency of food waste

Influence of Aerobic Pretreatment of Poultry Manure on the Biogas Production Process

Effect of Cornstalk Biochar Immobilized Bacteria on Ammonia Reduction in Laying Hen Manure Composting

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