Effect of superphosphate addition on heavy metals speciation and microbial communities during composting

Li, Shuxin; Chen, Wenjie; Liu, Dun; Tao, Yueyue; Ma, Hongting; Feng, Ziwei; Li, Songrong; Zhou, Kaiyun; Wu, Juan; Li, Ji; Wei, Yuquan

doi:10.1016/j.biortech.2022.127478

Cited by 22 publications

(5 citation statements)

References 48 publications

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“…As shown in Fig. 2 b, in the experimental groups CaPM1 and CaPM2, the main phyla were Proteobacteria (30.11% and 20.29%), Firmicutes (31.48% and 40.82%), and Actinobacteria (24.91% and 33.67%), which is to previous studies (Li et al 2022 ; Zhu et al 2021 ). However, this is different from the results of Wang et al ( 2023a , b ), which showed up to 77.46% ~ 92.83% of the Firmicutes during composting, a result much higher than the values of the present study.…”

Section: Resultssupporting

confidence: 88%

Ca(H2PO4)2 and MgSO4 activated nitrogen-related bacteria and genes in thermophilic stage of compost

Jiang,

Dai,

Wang

et al. 2024

Appl Microbiol Biotechnol

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This study was conducted to investigate the effects of Ca(H2PO4)2 and MgSO4 on the bacterial community and nitrogen metabolism genes in the aerobic composting of pig manure. The experimental treatments were set up as control (C), 1% Ca(H2PO4)2 + 2% MgSO4 (CaPM1), and 1.5% Ca(H2PO4)2 + 3% MgSO4 (CaPM2), which were used at the end of composting for potting trials. The results showed that Ca(H2PO4)2 and MgSO4 played an excellent role in retaining nitrogen and increasing the alkali-hydrolyzed nitrogen (AN), available phosphorus (AP), and available potassium (AK) contents of the composts. Adding Ca(H2PO4)2 and MgSO4 changed the microbial community structure of the compost. The microorganisms associated with nitrogen retention were activated. The complexity of the microbial network was enhanced. Genetic prediction analysis showed that the addition of Ca(H2PO4)2 and MgSO4 reduced the accumulation of nitroso-nitrogen and the process of denitrification. At the same time, despite the reduction of genes related to nitrogen fixation, the conversion of ammonia to nitrogenous organic compounds was promoted and the stability of nitrogen was increased. Mantel test analysis showed that Ca(H2PO4)2 and MgSO4 can affect nitrogen transformation-related bacteria and thus indirectly affect nitrogen metabolism genes by influencing the temperature, pH, and organic matter (OM) of the compost and also directly affected nitrogen metabolism genes through PO43− and Mg2+. The pot experiment showed that composting with 1.5% Ca(H2PO4)2 + 3% MgSO4 produced the compost product that improved the growth yield and nutrient content of cilantro and increased the fertility of the soil. In conclusion, Ca(H2PO4)2 and MgSO4 reduces the loss of nitrogen from compost, activates nitrogen-related bacteria and genes in the thermophilic phase of composting, and improves the fertilizer efficiency of compost products. Key points • Ca(H2PO4)2 and MgSO4 reduced the nitrogen loss and improved the compost effect • Activated nitrogen-related bacteria and altered nitrogen metabolism genes • Improved the yield and quality of cilantro and fertility of soil

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Section: Resultssupporting

confidence: 88%

Ca(H2PO4)2 and MgSO4 activated nitrogen-related bacteria and genes in thermophilic stage of compost

Jiang,

Dai,

Wang

et al. 2024

Appl Microbiol Biotechnol

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“…These results showed that the addition of illite caused a great impact on the ecological risk of Cu and Zn in pig manure composting. Previous studies showed that the addition of minerals reduced the ecological risk of composting by regulating the bacterial structure of microbial community in the compost ( Li G. et al, 2022 ; Li S. et al, 2022 ).…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, the addition of 4% spent mushroom substrate resulted in a 52.77% decrease in the exchangeable Cd content of the compost and a 65.28% increase in the residual Cd content ( Wei et al, 2020 ). Additionally, bone meal was used as a heavy metal passivator to add to aerobic composting of sludge, causing the proportion of residual Zn, Cr, and Pb increased from 4.71 to 13.65%, 57.53 to 68.77%, and 45.49 to 88.91%, respectively ( Li G. et al, 2022 ; Li S. et al, 2022 ).…”

Section: Introductionmentioning

confidence: 99%

Effect of thermal treatment of illite on the bioavailability of copper and zinc in the aerobic composting of pig manure with corn straw

Escobar,

Ji,

Wang

et al. 2024

Front. Microbiol.

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The large amount of various types of heavy metals in animal manure applied to agricultural field has caused severe threat to the ecosystems of soil environments. In this study, the effect of thermal treatment of illite on the bioavailability of copper (Cu) and zinc (Zn) in the aerobic composting of pig manure with corn straw biochar was investigated. The objectives of this study were to characterize the variations in the bioavailability of Cu and Zn in the aerobic composting of pig manure added with illite treated with high temperatures and to identify the relatively dominant microbes involved in the formation of humus and passivation of heavy metals in pig manure composting based on 16S rRNA high-throughput sequencing analysis. The results showed that in comparison with the raw materials of pig manure, the bioavailability of Zn and Cu in the control and three experimental composting groups, i.e., group I (with untreated illite), group I-2 (with illite treated under 200°C), and group I-5 (with illite treated under 500°C), was decreased by 27.66 and 71.54%, 47.05 and 79.80%, 51.56 and 81.93%, and 58.15 and 86.60%, respectively. The results of 16S rRNA sequencing analysis revealed that in the I-5 group, the highest relative abundance was detected in Fermentimonas, which was associated with the degradation of glucose and fructose, and the increased relative abundances were revealed in the microbes associated with the formation of humus, which chelated with Zn and Cu to ultimately reduce the bioavailability of heavy metals and their biotoxicity in the compost. This study provided strong experimental evidence to support the application of illite in pig manure composting and novel insights into the selection of appropriate additives (i.e., illite) to promote humification and passivation of different heavy metals in pig manure composting.

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“…Basidiomycota and Ascomycota were the most abundant phyla in activated sludge samples (Niu et al, 2017;Zhang et al, 2018). Lin et al (2019) reported that Ascomycota were well adapted to high heavy metal concentrations in paddy soil; the reason could be that Ascomycota can adapt well to diverse environmental stress and nutritional options (Hu et al, 2019;Li et al, 2022). The relative abundance of Basidiomycota was higher in the paddy soil with low amounts of heavy metals than those with higher concentrations (Lin et al, 2019).…”

Section: Microeukaryotic Communitymentioning

confidence: 98%

Changes in the bacterial and microeukaryotic communities in the bioreactor upon increasing heavy metal concentrations

Aceves-Suriano,

Montoya-Ciriaco,

Hernández-Guzmán

et al. 2023

Front. Environ. Chem.

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Heavy metals are necessary at low concentration for biological activity, but they are often toxic for microorganisms at high concentrations. Amplicon sequencing of 16S rRNA and 18S rRNA was used to investigate changes in the bacterial and microeukaryotic communities in an activated sludge bioreactor incrementally contaminated with nickel (Ni), copper (Cu), and zinc (Zn) with an IC50 value ranging from 0% to 100%, as previously determined, while an uncontaminated bioreactor served as a control. The chemical oxygen demand (COD) was on average 90% in the uncontaminated bioreactor but dropped to 49% when the heavy metal concentration was 100% IC50. The bacterial community in the uncontaminated bioreactor was dominated by Alphaproteobacteria (mostly Agrobacterium and Brevundimonas) when the heavy metal concentrations were low and Bacteroidetes (mostly Sphingobacterium) when the highest amounts of heavy metal concentrations were applied. The members of Ciliophora, Ascomycota, and Basidiomycota alternatively dominated in the uncontaminated bioreactor, while Ascomycota (mostly Fusarium) dominated in the contaminated bioreactor. The results revealed that increased concentrations of Ni, Cu, and Zn altered the bacterial and microeukaryotic communities and some putative metabolic functions.

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Effect of superphosphate addition on heavy metals speciation and microbial communities during composting

Cited by 22 publications

References 48 publications

Ca(H2PO4)2 and MgSO4 activated nitrogen-related bacteria and genes in thermophilic stage of compost

Ca(H2PO4)2 and MgSO4 activated nitrogen-related bacteria and genes in thermophilic stage of compost

Effect of thermal treatment of illite on the bioavailability of copper and zinc in the aerobic composting of pig manure with corn straw

Changes in the bacterial and microeukaryotic communities in the bioreactor upon increasing heavy metal concentrations

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