Evaluation of total greenhouse gas emissions during sewage sludge composting by the different dicyandiamide added forms: Mixing, surface broadcasting, and their combination

Jiang, Jingshan; Kang, Kang; Chenjing, Wang; Sun, Xingju; Dang, S. T.; Wang, Nian; Wang, Yan; Zhang, Chunyan; Yan, Guangwu; Li, Yunbei

doi:10.1016/j.wasman.2018.10.003

Cited by 45 publications

(14 citation statements)

References 63 publications

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“…Although the nitrogen loss caused by N 2 O volatilization is much less than that caused by NH 3 volatilization during the SS composting process, the greenhouse effect caused by N 2 O could not be ignored ( Jiang et al., 2018 ). N 2 O is generally generated by nitrification and denitrification in the SS composting, and the main path of N 2 O production is denitrification which generally occurs in the area of insufficient oxygen or local anaerobic area of the reactor ( Wu et al., 2018 ).…”

Section: Resultsmentioning

confidence: 99%

Influence of spent mushroom substrate and molasses amendment on nitrogen loss and humification in sewage sludge composting

Meng

Zhang

et al. 2020

Heliyon

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The present study included lab-scale sewage sludge (SS) composting amended by molasses and spent mushroom substrate (SMS) in 5 L composting reactor system. The influence of molasses and SMS amendment on nitrogen loss and humification of SS composting was evaluated. The results showed that SMS amendment, especially combination with molasses raised composting temperature, increased CO 2 volatilization, promoted organic matter degradation, improve germination index and humification process. The addition of SMS and molasses contain carbohydrates used as carbon source and energy substance by microorganisms could increase microbial activity and ammonia assimilation. In the SMS + molasses treatments, NH 3 volatilization was reduced by 33.1%–37.3% and N 2 O volatilization was only 17.8%–25.4% of that in the control treatment, furthermore, the nitrogen loss rate was reduced by 27.2%–32.2%. Consequently, the addition of SMS and molasses improved the compost maturity and reduced nitrogen loss in the SS composting process.

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Section: Resultsmentioning

confidence: 99%

Influence of spent mushroom substrate and molasses amendment on nitrogen loss and humification in sewage sludge composting

Meng

Zhang

et al. 2020

Heliyon

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“…DOC mainly includes small molecule, simple structure and water soluble carbon source materials, so it is easily used by microorganisms to participate in the biochemical reaction of composting 35 . The change of DOC in the composting could indirectly reflect the metabolism of compost microorganisms, and DOC had a certain relationship with the degradation of OM and the maturity of the compost product, so DOC could also be used to evaluate the stability of composting product 36 . The evolutions of DOC in five treatments are showed in Fig.…”

Section: Resultsmentioning

confidence: 99%

Improving sewage sludge compost process and quality by carbon sources addition

Meng

Zhang

et al. 2021

Sci Rep

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In present study, the effects of carbon sources on compost process and quality were evaluated in the lab-scale sewage sludge (SS) composting. The composting experiments were performed for 32 days in 5 L reactors. The results showed that carbon sources could change the nitrogen conversion and improve the compost quality. Especially, the readily degradable carbon source could promote organic matter degradation, improve nitrogen conversion process and accelerate compost maturation. The addition of glucose and sucrose could increase dissolved organic carbon, CO2 emission, dehydrogenase activity, nitrification and germination index during the SS composting. That's because glucose and sucrose could be quickly used by microbes as energy and carbon source substance to increase activity of microbes and ammonia assimilation. What's more, the NH3 emission was reduced by 26.9% and 32.1% in glucose and sucrose treatments, respectively. Therefore, the addition of readily degradable carbon source could reduce NH3 emission and improve compost maturity in the SS composting.

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“…The optimized composting process comprises the use of bulking agent, 27 suitable aeration rate, 44 moisture content, 45 composting type, etc. The external assisted technology refers to the addition of mineral additives, 46 chemical agents, 10,37 and microbial inoculant. 47 Table 2 shows the GHG emissions for different types of feedstock used in composting.…”

Section: Strategies Of Ghgs Mitigation During Various Methods Of Organic Waste Compostingmentioning

confidence: 99%

“…The addition of additives such as phosphogypsum, superphosphate, microbial agent, zeolite, biochar, 108,109 dicyandiamide, bentonite, and medical stone could effectively improve the composting process and reduce the potential environmental risk. 14,20,22,37 The addition of chemical additives (e.g. superphosphate, phosphogypsum, dicyandiamide, and magnesium and phosphate salts) could incorporate the SO 4 2- and inhibit the nitrification in composting pile, and thus reduce the CH 4 and N 2 O emission.…”

Section: Economic Analysis and Technology Gap Of Cleaner Composting And Mitigation Strategiesmentioning

confidence: 99%

“…36 Jiang et al. 37 demonstrated that mixing or surface broadcasting of dicyandiamide could decrease the total GHG emissions by 16.7–5.7% during the sewage sludge composting. In summary, the addition of additives could reduce the GHG emissions; however, depending on the different characters of the feedstock, composting system, as well as operation, there exists differences in the efficiency of the mitigation.…”

Section: Introductionmentioning

confidence: 99%

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Current status of global warming potential reduction by cleaner composting

Liu

Awasthi

Duan

et al. 2019

Energy & Environment

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The global living standards are currently undergoing a stage of growth; however, such improvement also brings some challenges. Global warming is the greatest threat to all living things and attracts more and more attention on a global scale due to the rapid development of economy. Carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) are the common components of greenhouse gases, which contribute to the global warming. Mitigation technologies for these gas emissions are urgently needed in every industry for the aim of cleaner production. Traditional agriculture also contributes significantly to enhance the greenhouse gases emission. Composting is a novel and economic greenhouse gases mitigation strategy compared to other technologies in terms of the organic waste disposal. Some of the European countries showed an increase of more than 50% in the composting rate. The microbial respiration, nitrification and denitrification processes, and the generation of anaerobic condition makes the emission of greenhouse gases inevitable during composting. However, although there have been a lot of papers that focused on the reduction of greenhouse gases emission in composting, none of these has summarized the methods of reducing the emission of greenhouse gases during the composting. This review discusses the benefit of composting in greenhouse gases mitigation in the organic waste management and the current methods to improve mitigation efficiency during cleaner composting. Key physical, chemical, and biological parameters related to greenhouse gases mitigation strategies were precisely studied to give a deep understanding about the emission of greenhouse gases during cleaner composting. Furthermore, the mechanism of greenhouse gases emission mitigation strategies for cleaner composting based on various external measures would be helpful for the exploration of novel and effective mitigation strategies.

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Evaluation of total greenhouse gas emissions during sewage sludge composting by the different dicyandiamide added forms: Mixing, surface broadcasting, and their combination

Cited by 45 publications

References 63 publications

Influence of spent mushroom substrate and molasses amendment on nitrogen loss and humification in sewage sludge composting

Influence of spent mushroom substrate and molasses amendment on nitrogen loss and humification in sewage sludge composting

Improving sewage sludge compost process and quality by carbon sources addition

Current status of global warming potential reduction by cleaner composting

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