The influence of flue gas desulphurization gypsum additive on characteristics and evolution of humic substance during co-composting of dairy manure and sugarcane pressmud

Guo, Xiaobo; Huang, Junhao; Lu, Yanyu; Shan, Guangchun; Li, Qunliang

doi:10.1016/j.biortech.2016.07.125

Cited by 42 publications

(14 citation statements)

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“…Figure 4F shows the NH 4 + /NO 3 − ratio throughout the composting process. The NH 4 + /NO 3 − ratio is a desirable candidate indicator for compost maturity [30]. The NH 4 + /NO 3 − ratio of all treatments in the present study decreased gradually.…”

Section: The Effects On Organic Matter Tkn C/n Nhsupporting

confidence: 46%

“…Jeong and Kim [52] found that using amendments such as bauxite residues or biodegradable plastics could control compost pH. Guo et al [30] reported that FGD gypsum has the ability to absorb ammonia. In addition, gypsum addition converts the ammonium carbonate to ammonium sulfate along with the formation of calcium carbonate [30].…”

Section: The Effect On Ammonia Volatilizationmentioning

confidence: 99%

“…Guo et al [30] reported that FGD gypsum has the ability to absorb ammonia. In addition, gypsum addition converts the ammonium carbonate to ammonium sulfate along with the formation of calcium carbonate [30]. The N in ammonium carbonate is much more apt to be lost as ammonia than when it is in the form of ammonium sulfate [29].…”

Section: The Effect On Ammonia Volatilizationmentioning

confidence: 99%

“…Biochar materials strongly sorb polycyclic aromatic hydrocarbons (PAHs) and are thus characterized by very high sorption coefficients (K D ) for PAHs [27].It was also reported that the N loss was mitigated by adding FGD gypsum to composting materials [28,29]. Flue gas desulphurization gypsum (FGD gypsum) is a by-product of wet gas desulphurization in coal-fired power stations and generally has a high purity, low heavy metal content, and is rich in essential mineral nutrients for plants such as S, Si and Ca [30,31]. The volatilization of ammonia and N loss were reduced by combining organic N-rich organic waste with FGD gypsum during the composting process [29].…”

mentioning

confidence: 99%

“…The volatilization of ammonia and N loss were reduced by combining organic N-rich organic waste with FGD gypsum during the composting process [29]. The nitrogen compounds of humic substance in compost with FGD gypsum was higher than that in compost without FGD gypsum [30]. Gypsum has been known as an effective product used in the remediation of sodic soils, by greatly reducing the exchangeable Na, K, and Mg cation concentrations in the sodic soils [32,33].…”

mentioning

confidence: 99%

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The Effect of Co-Additives (Biochar and FGD Gypsum) on Ammonia Volatilization during the Composting of Livestock Waste

2018

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The effectiveness of co-additives for improving livestock waste composting (reduction of air pollution and conservation of nutrients) was investigated. Biochar and Flue gas desulphurization gypsum (FGD gypsum) were used to supplement the composting of a mixture of slaughter waste, swine slurry, and sawdust. Different compositions of additives (0% or 5% each, 10% biochar or FGD gypsum) were tested in triplicate on the laboratory scale. In addition, the effects of two different aeration schemes (continuous and intermittent) were also investigated. Ammonia volatilization, physicochemical characteristics, and compost maturity indices were investigated. The results indicated that the use of the co-additive (Biochar and FGD gypsum) during composting of livestock waste led to a reduction of ammonia volatilization by 26-59% and to a 6.7-7.9-fold increase of nitrate accumulation. The total ammonia volatilization of intermittent aeration treatment was lower than that of continuous aeration using co-additives treatment. It was concluded that co-additives (biochar and FGD gypsum) might be utilized in livestock waste composting to reduce ammonia volatilization and improve nutrient conservation.Sustainability 2018, 10, 795 2 of 18 both the aeration rate and the ratio of bulking agent to waste during composting [8,9]. Among the potential odor compounds, ammonia (NH 3 ) is a major component that causes odors nuisance and toxicity to humans and plants [10]. Nitrogen losses that occurred during composting resulted in the emission of ammonia (NH 3 ) gas (ammonia volatilization) accounted for 24-33% of the initial N in household waste [11], 46.8-77.4% of the initial N of a mixture of straw and manure [12], 62% of the initial N was during composting of poultry layer manure [13], and 24-64% of the nitrogen was in organic waste [14]. The volatilization of ammonia deteriorating both human health and the environment would reduce the fertilizer value of the organic waste. Barrington et al. [15] reported that carbon availability, bulking agent, particle size, moisture content, and aeration regime are the factors that determine whether composting results in N volatilization as odor or N immobilization into organic components. The odor emission rate was correlated with both the aeration rate and the ratio of bulking agent to waste when composting [8].The utilization of chemical and biological additives to mitigate ammonia volatilization and nitrogen loss during the composting process has been extensively studied. These additives have included wood fly ash, lime, phosphor-gypsum, polyethylene glycol, jaggery [16], zeolite [17], bentonite [18], superphosphate [19], and microbial inoculants [20]. Among these additives, biochar was popular to be amended in the composting mixture. Biochar is a carbon rich material produced by the thermal decomposition of biomass, was effective for reducing volatilization of ammonia during the composting of a mixture of sewage sludge and wood chips [21]. The faster decomposition process in the bio-oxidative phase...

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Section: The Effects On Organic Matter Tkn C/n Nhsupporting

confidence: 46%