The impact of silver nanoparticles on the co-composting of sewage sludge and agricultural waste: Evolutions of organic matter and nitrogen

Zhang, Lihua; Zeng, Guangming; Dong, Haoran; Chen, Yaoning; Zhang, Jiachao; Yan, Ming; Zhu, Yuan; Yuan, Yujie; Xie, Yankai; Huang, Zhenzhen

doi:10.1016/j.biortech.2017.01.032

Cited by 110 publications

(21 citation statements)

References 46 publications

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“…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 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 Awasthi et al, 2017b;Zhang et al, 2017). At the end of compost, the pH in five treatments was 8.1, 7.5, 7.9, 7.8 and 7.8 for CK, PF, AW, PA1, and PA2 treatments, respectively, and all the values met maturity requirements, with values <9 (de Bertoldi et al, 1983).…”

Section: Changes In Temperature Electrical Conductivity and Ph Durisupporting

confidence: 78%

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: Changes In Temperature Electrical Conductivity and Ph Durisupporting

confidence: 78%

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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“…Research confirmed the positive impact of sewage sludge on the development of native soil bacteria [28]. There is a significant proportional increase in the number of studied microorganisms along with an increased dose of sewage sludge, while organic matter introduced with composts from sewage sludge has a direct impact on the growth and yield of plants and the physical, chemical, and microbiological status of the soil [29,30]. Composts from sewage sludge increased soil cation exchange capacity, whereas a high value of this indicator suggests the stronger binding of cations in the soil environment, resulting in the immobilization of nutrients and greater resistance to pollution [31].…”

Section: Introductionmentioning

confidence: 74%

Heat Energy and Gas Emissions during Composting of Sewage Sludge

et al. 2019

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The composting of sewage sludge and maize straw mixtures was investigated in this study. The aim was to analyze the influence of different proportions of sewage sludge and maize straw in the mixtures on composting process dynamics (expressed by heat production) and gas emissions. The results showed that all examined mixtures reached a strong thermophilic phase of composting; however, the lowest dynamic of temperature growth was observed in the case of the biggest sewage sludge content (60% of sewage sludge in the composting mixture). The ammonia concentration inside bioreactor chambers was directly related to the content of sewage sludge in the composted mixture. Excessive contents of sewage sludge had a considerable effect on very low C/N ratios and high losses through ammonia emissions. Tests were carried out in reactors with a capacity of 160 dm3 under controlled conditions. All mixtures were aerated by the average air-flow of about 2.5 dm3∙min−1, i.e., the minimum air-flow that allows a temperature of about 70 °C to be reached and a sufficiently long thermophilic phase, which ensures proper composting.

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“…The majority of these studies indicate that the presence of nano-Ag or -TiO 2 at the concentrations investigated do not inhibit waste degradation processes at concentrations as high as 2,250 mg Ti/kg organic matter and 100 mg Ag/kg wet waste (Table 3). One exception to this observation is a study conducted by Zhang et al (2017). Zhang et al (2017) suggested that nano-Ag may impede organics decomposition.…”

Section: Potential Enm Fate and Transformation During Aerobic Conditionsmentioning

confidence: 99%

A review of the fate of engineered nanomaterials in municipal solid waste streams

et al. 2018

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Significant knowledge and data gaps associated with the fate of product-embedded engineered nanomaterials (ENMs) in waste management processes exist that limit our current ability to develop appropriate end-of-life management strategies. This review paper was developed as part of the activities of the IWWG ENMs in Waste Task Group. The specific objectives of this review paper are to assess the current knowledge associated with the fate of ENMs in commonly used waste management processes, including key processes and mechanisms associated with ENM fate and transport in each waste management process, and to use that information to identify the data gaps and research needs in this area. Literature associated with the fate of ENMs in wastes was reviewed and summarized. Overall, results from this literature review indicate a need for continued research in this area. No work has been conducted to quantify ENMs present in discarded materials and an understanding of ENM release from consumer products under conditions representative of those found in relevant waste management process is needed. Results also indicate that significant knowledge gaps associated with ENM behaviour exist for each waste management process investigated. There is a need for additional research investigating the fate of different types of ENMs at larger concentration ranges with different surface chemistries. Understanding how changes in treatment process operation may influence ENM fate is also needed. A series of specific research questions associated with the fate of ENMs during the management of ENM-containing wastes have been identified and used to direct future research in this area.

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The impact of silver nanoparticles on the co-composting of sewage sludge and agricultural waste: Evolutions of organic matter and nitrogen

Cited by 110 publications

References 46 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

Heat Energy and Gas Emissions during Composting of Sewage Sludge

A review of the fate of engineered nanomaterials in municipal solid waste streams

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