Pyrolyzed municipal sewage sludge ensured safe grain production while reduced C emissions in a paddy soil under rice and wheat rotation

Shao, Qianqian; Ju, Yanyan; Guo, Wei; Xia, Xin; Bian, Rongjun; Li, Lianqing; Li, Wenjian; Liu, Xiaoyu; Zheng, Jufeng; Pan, Genxing

doi:10.1007/s11356-019-04417-6

Cited by 22 publications

(4 citation statements)

References 69 publications

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“…As a consequence of the low availability, the amount of TEs taken up by plants was maintained or decreased in about 80% of the cases (Supplemental Table S1). Additionally, increased Zn uptake was commonly observed because this is often the TE present at the highest concentration in SSBC (Gwenzi, Muzava, Mapanda, & Tauro, 2016; Shao et al., 2019). Bioaccumulation of As, Cd, and Pb was reported in only two studies (Huang et al., 2017; Yue, Cui, Lin, Li, & Zhao, 2017).…”

Section: Introductionmentioning

confidence: 99%

Long‐term effects of sewage sludge–derived biochar on the accumulation and availability of trace elements in a tropical soil

et al. 2020

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Thermal treatment by pyrolysis has been proposed as a sustainable alternative to enable the agricultural use of sewage sludge. The solid product obtained via pyrolysis of sewage sludge is called sewage sludge biochar and presents several advantages for its use as a fertilizer or soil conditioner. However, there are concerns about the accumulation and dynamics of trace elements in soil amended with sewage sludge biochar over the years. This study examined the effect of sewage sludge biochar, under field conditions for 5 yr, on the accumulation and availability of trace elements in a tropical soil. For this, 15 t ha–1 of sewage sludge biochar produced at 300 and 500 °C were applied in the first two growing seasons. Application was interrupted from the third to the fifth seasons to assess the residual effect of sewage sludge biochar in the soil. The total and available trace element concentrations were determined. The total contents of trace elements showed the following variation in the soil over the 5 yr (mg kg–1): Cd (16.8–20.0), Co (19.5–21.5), Cr (98.2–125.7), Cu (8.1–17.1), Mn (62.9–85.7), Ni (20.3–35.0), Pb (27.0–52.4), and Zn (20.3–35.8). There was no change in the availability of Cd, Cr, Ni, and Pb over the years. Additionally, a residual effect of the sewage sludge biochar was the increase in availability of trace elements that are considered essential (Cu, Mn, and Zn) and beneficial elements (Co) for plants. Therefore, in relation to contamination by trace elements, the pyrolysis of sewage sludge of domestic origin proved to be an adequate strategy to enable the safe use of this residue in tropical agriculture.

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Section: Introductionmentioning

confidence: 99%

Long‐term effects of sewage sludge–derived biochar on the accumulation and availability of trace elements in a tropical soil

et al. 2020

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“…Compared to the unpyrolyzed biowaste, pak choi biomass production in the amended pot soil was higher by folds with SMB and SSB but unchanged with WSB ( Table 5 ). Over control, pak choi biomass yield greatly ( p <0.01) declined (by almost 60%) under USM and USS, probably owing to the constraints by high salinity (high EC, Table 1 ) and high availability and mobility of PTEs ( Shao et al 2019 ), particularly of Zn and Cd. Following pyrolysis, Zn in swine manure and salt in sewage sludge were largely immobilized ( Table 2 ), plant growth in the biochar added soil was further promoted with the improvement of soil nutrients and reaction (compared to original soil pH 4.99).…”

Section: Discussionmentioning

confidence: 97%

“…Particularly, such biochar had been found a great potential for use in waste water treatment ( Mohan et al, 2014 ). In agriculture, whereas, livestock manure and municipal sewage sludge had been treated with pyrolysis into biochar and tested for plant growth ( Khan et al, 2017 ; Shao et al, 2019 ), waste composting ( Chowdhury et al, 2014 ) and environmental sorbents ( Ahmad et al, 2014 ). While information on the removal of ARGs in biowastes by pyrolysis were very limited ( Cui et al, 2017 ), it could be a critical issue if pyrolysis could concurrently stabilize PTEs and ARGs in biowaste and thus ensure safe application for plant growth ( Chen et al, 2018 ; Zhou et al, 2019 ).…”

Section: Introductionmentioning

confidence: 99%

Pyrolyzed biowastes deactivated potentially toxic metals and eliminated antibiotic resistant genes for healthy vegetable production

Zhi

Rui

Liu

et al. 2020

Journal of Cleaner Production

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Potentially toxic metals (PTEs) and antibiotic resistance genes (ARGs) present in bio-wastes were the major environmental and health risks for soil use. If pyrolyzing bio-wastes into biochar could minimize such risks had not been elucidated. This study evaluated PTE pools, microbial and ARGs abundances of wheat straw (WS), swine manure (SM) and sewage sludge (SS) before and after pyrolysis, which were again tested for soil amendment at a 2% dosage in a pot experiment with a vegetable crop of pak choi ( Brassica campestris L.). Pyrolysis led to PTEs concentration in biochars but reduced greatly their mobility, availability and migration potential, as revealed respectively by leaching, CaCl 2 extraction and risk assessment coding. In SM and SS after pyrolysis, gene abundance was removed by 4 to 5 orders for bacterial, by 2-3 orders for fungi and by 3-5 orders for total ARGs. With these material amended, PTEs available pool decreased by 25% to 85% while all ARGs eliminated to background in the pot soil. Unlike a >50% yield decrease and a >30% quality decline with unpyrolyzed SM and SS, their biochars significantly ( p >0.05) increased biomass production and overall quality of pak choi grown in the amended soil. Comparatively, amendment of the biochars decreased plant PTEs content by 23-57% and greatly reduced health risk of pak choi, with total target hazard quotient values well below the guideline limit for subsistence diet by adult. Furthermore, biochar soil amendment enabled a synergic improvement on soil fertility, product quality, and biomass production as well as metal stabilization in the soil-plant system. Thus, biowastes pyrolysis and reuse in vegetable production could help build up a closed loop of production-waste-biochar-production, addressing not only circular economy but healthy food and climate nexus also and contributing to achieving the United Nations sustainable development goals.

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“…Property of soil • Increased activity of enzyme (Deng et al, 2003) • Water retention has been improved. Phosphorus sorption has been increased (Filipović et al, 2020) • Soil pH has been raised, electrical conductivity has been reduced, and heavy metal uptake has been diminished (Gwenzi et al, 2016) • Enrichment of C, increment in microbial biomass, reduced mobility of Cd (Shao et al, 2019) • Improvement in field capacity, water storage capacity, wilting point, and texture soils. Bulk density has been reduced (Razzaghi et al, 2020) • N, pH, C, and efficiency use of microbes have been improved, and Cd, Pb content have been (Huang et al, 2016) woodchips (Grobelak et al, 2019).…”

Section: Effect Outcome Referencementioning

confidence: 99%

Production strategies and potential repercussion of sewage sludge biochar as a futuristic paradigm toward environmental beneficiation: A comprehensive review

Venkatesa Prabhu,

Hamda,

Jayakumar

et al. 2023

Environmental Quality Mgmt

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The generation of sewage wastewater is unavoidable due to the continual increase in the global population that paves the way to appropriate disposal management. Sewage wastewater treatment and consequent generation of sewage sludge (SS) are well connected with global environmental issues. Upon risk assessment on different SS disposal methods, converting SS into biochar, that is, sewage sludge biochar, can be recommendable management. It is well‐proven for excellent positive impacts, such as nutrient enhancement, and healthier plant growth, and mitigates the emissions of greenhouse gases while amending with agricultural soil. However, the outcome features of SSB significantly vary with pyrolysis temperature and its elemental constituents. In addition, many studies revealed that the process temperature is key to responsible for the desirable properties and functioning of SSB. In this context, many countries support to the development of a futuristic strategy for SS management toward producing SSB and its utilization in agriculture. This review compiles studies into SSB's ability to promote a sustainable effect on the total worldwide output volume. Furthermore, the generation of SSB is also analyzed from a socioeconomic standpoint in relation to other common SS disposal management strategies.

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Pyrolyzed municipal sewage sludge ensured safe grain production while reduced C emissions in a paddy soil under rice and wheat rotation

Cited by 22 publications

References 69 publications

Long‐term effects of sewage sludge–derived biochar on the accumulation and availability of trace elements in a tropical soil

Long‐term effects of sewage sludge–derived biochar on the accumulation and availability of trace elements in a tropical soil

Pyrolyzed biowastes deactivated potentially toxic metals and eliminated antibiotic resistant genes for healthy vegetable production

Production strategies and potential repercussion of sewage sludge biochar as a futuristic paradigm toward environmental beneficiation: A comprehensive review

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