Apple pomace improves the quality of pig manure aerobic compost by reducing emissions of NH3 and N2O

Mao, Hui; Zhang, Teng; Li, Ronghua; Zhai, Bingnian; Wang, Zhaohui; Wang, Quan; Zhang, Zengqiang

doi:10.1038/s41598-017-00987-y

Cited by 32 publications

(18 citation statements)

References 38 publications

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“…Thereafter, the N 2 O emissions decreased gradually and remained at a low level until the end of composting. This emission trend was also reported in previous studies (Awasthi et al, 2017a; Mao et al, 2017). Mao et al (2017) also observed that N 2 O emissions were mainly emitted in the thermophilic phase when apple pomace was added during composting.…”

Section: Resultssupporting

confidence: 91%

“…2b. The initial values of pH in other treatments were significantly lower than in CK (6.29), due to the addition of calcium superphosphate and apple waste (Jiang et al, 2014; Mao et al, 2017). Subsequently, pH increased rapidly with increase in temperature and reached peak values due to the rapid volatilization of NH 4 + , and then decreased because of the formation of low‐molecular‐weight fatty acids and carbon dioxide (CO 2 ) emissions from OM degradation (Bernal et al, 2009), which were similar to most of studies of composting (Jiang et al, 2014; Awasthi et al, 2017b; Zhang et al, 2017).…”

Section: Resultsmentioning

confidence: 97%

“…A pot experiment was performed according to previous studies (Mao et al, 2017; Wang et al, 2016a). Surface layer (0‐ to 20‐cm depth) soil samples were obtained from a vegetable field in the suburban district of Xinxiang, Henan Province.…”

Section: Methodsmentioning

confidence: 99%

“…Apple ( Malus pumila Mill.) waste, a byproduct of the production of fruit juice, is not only an acidic material but can also adsorb NH 3 (Mao et al, 2017). Zhang et al (2013) reported that calcium superphosphate prolonged the thermophilic stage, accelerated the composting process, and decreased the N loss.…”

mentioning

confidence: 99%

“…In addition, Hanc and Chadimova (2014) reported that the addition of apple waste improved compost quality by increasing nutrient contents (N, phosphorus [P], potassium [K], and magnesium [Mg], etc.). Mao et al (2017) stated that the application of apple waste effectively controlled NH 3 and N 2 O emissions, and the reduction was 57 and 24% compared with those in the control. However, after its addition, calcium superphosphate resulted in a low pH, which inhibited the activity of microorganisms and prolonged the composting process (Jiang et al, 2014).…”

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confidence: 99%

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Adding Phosphate Fertilizer and Apple Waste to Pig Manure during Composting Mitigates Nitrogen Gas Emissions and Improves Compost Quality

Jiang

Kang²,

Yan

et al. 2019

J of Env Quality

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Calcium superphosphate and apple (Malus pumila Mill.) waste can be used for controlling N loss and improving compost quality during composting, whereas integrated addition of the two additives on composting process remains unexplored. Therefore, this study was conducted to investigate the effects of combined use of calcium superphosphate and apple waste on NH3 and N2O emissions and compost quality during pig manure and wheat (Triticum aestivum L.) straw composting. Mixtures of pig manure and wheat straw were combined with 6% phosphate fertilizer (PF), 15% apple waste (AW), 3% phosphate fertilizer + 7.5% apple waste (PA1), or 1.8% phosphate fertilizer + 10.5% apple waste (PA2) based on dry weight of the initial mixtures; a treatment with no additives served as a control (CK). The PF treatment took 3 d longer to reach thermophilic phase than the CK, PA1, and PA2 treatments. The treatments of PF and PA1 reduced NH3 and N2O emissions by 67 and 45%, respectively. Moreover, N loss in PF and PA1 treatments (31.8 and 30.1%, respectively) was significantly less than in the CK. A pot experiment showed that application of the compost with PA1 treatment could increase plant height and dried biomass of Chinese pakchoi (Brassica campestris L. ssp.). We recommend adding 3% phosphate fertilizer and 7.5% apple waste to pig manure during composting. Core Ideas Effect of phosphate fertilizer (PF) and apple waste (AW) on N conversion was studied. Combination of 3% PF and 7.5% AW is more beneficial for composting. Using 3% PF and 7.5% AW reduced NH3 and N2O by 67% and 40% during composting. The compost of 3% PF and 7.5% AW improved plant height and dried biomass.

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Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 97%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Adding Phosphate Fertilizer and Apple Waste to Pig Manure during Composting Mitigates Nitrogen Gas Emissions and Improves Compost Quality

Jiang

Kang²,

Yan

et al. 2019

J of Env Quality

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Sustainable valorization of apple waste in a biorefinery: a bibliometric analysis

Oliveira

Ampese

Sforça

et al. 2022

Biofuels Bioprod Bioref

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This bibliometric study explored the scientific publications of apple waste over the period from 2000 to 2020, aiming to contribute to the sustainable development of the apple industry toward waste-biorefinery implementation, advocating a circular economy. The bibliometric study covered the publications' evolution, research areas, top-cited papers, international collaborative networks, top countries and journals. The results demonstrate that 628 documents (604 articles and 24 reviews) studied apple waste over the last 20 years, and the number of publications exponentially increased after 2010. The most used keywords revealed that the main studied topics in the field were associated with technologies to manage apple pomace, the main solid waste generated from juice production, demonstrating a research trend toward renewable energy and bio-based products. The bibliometric study indicated that the most productive countries are China, India and the USA. Apple waste could be an environmentally friendly feedstock for biorefinery design and implementation. The biorefinery could produce value-added products (polyphenols, pectin, sugars and essential oils) and bioenergy (ethanol, methane, electricity and heat) in different industrial arrangements. The main technological routes described in the literature have been associated with the production of lactic acid, xylitol, ethanol, bioactive compounds, xyloglucan, films, pectin, acetic acid, acetone-butanol-ethanol, emulsifiers and inulinase enzyme. In conclusion, this review contributes to the decision-making for the industrial implementation of a waste biorefinery, advocating circular economy transition based on the sustainable valorization of apple waste.

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Industrial Apple Pomace as a Bioresource for Food and Agro Industries

Rana

Kapoor

Rana

et al. 2021

Sustainable Agriculture Reviews 56

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Apple pomace improves the quality of pig manure aerobic compost by reducing emissions of NH3 and N2O

Abstract: In this study, the effects of apple pomace (AP) addition (0%, 5%, 10%, and 20% on a dry weight basis, named as control, AP1, AP2, and AP3) and citric acid (CA) addition on nitrogen conservation were investigated during aerobic composting of pig manure. Gaseous emissions of

Cited by 32 publications

References 38 publications

Adding Phosphate Fertilizer and Apple Waste to Pig Manure during Composting Mitigates Nitrogen Gas Emissions and Improves Compost Quality

Adding Phosphate Fertilizer and Apple Waste to Pig Manure during Composting Mitigates Nitrogen Gas Emissions and Improves Compost Quality

Sustainable valorization of apple waste in a biorefinery: a bibliometric analysis

Industrial Apple Pomace as a Bioresource for Food and Agro Industries

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