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Impact of municipal solid waste incineration on heavy metals in the surrounding soils by multivariate analysis and lead isotope analysis

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Journal of Environmental Sciences 2019年第8期31卷 47-56页

作者： Yang Li Hua Zhang Liming Shao Xiaoli Zhou Pinjing He State Key Laboratory of Pollution Control and Resource Reuse Tongji University Institute of Waste Treatment and Reclamation Tongji University Shanghai Institute of Pollution Control and Ecological Security Centre for the Technology Research and Training on Household Waste in Small Towns & Rural Area Ministry of Housing Urban-Rural Development

Municipal solid waste(MSW) incineration has become an important anthropogenic source of heavy metals(HMs) to the environment. However, assessing the impact of MSW incineration on HMs in the environment, especially soils, can be a challenging task because of various HM sources. To investigate the effect of MSW incineration on HMs in soils, soil samples collected at different distances from four MSW incinerators in Shanghai, China were analyzed for their contents of eight HMs(antimony, cadmium, chromium, copper,lead, mercury, nickel, and zinc) and lead(Pb) isotope ratios. Source identification and apportionment of HMs were accomplished using principal component analysis and Pb isotope analysis. Results indicated that the relatively high contents of cadmium, lead,antimony, and zinc in the soils at 250 m and 750–1250 m away from the MSW incinerators were related to MSW incineration, while the elevated contents of the other four HMs were associated with other anthropogenic activities. Based on Pb isotope analysis, the contribution ratio of MSW incineration(which had been operated for more than 14 years)to the accumulation of Pb in soil was approximately 10% on average, which was lower than coal combustion only. Incinerator emissions of Pb could have a measurable effect on the soil contamination within a limited area(≤1500 m).

关键词： Municipal solid waste incineration Soils Heavy metals Source identification Pb isotope ratios

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Estimating source strengths of HCl and SO_2 emissions in the flue gas from waste incineration

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Journal of Environmental Sciences 2019年第1期31卷 370-377页

作者： Hua Zhang Siyuan Yu Liming Shao Pinjing He State Key Laboratory of Pollution Control and Resource Reuse Tongji University Institute of Waste Treatment & Reclamation College of Environmental Science and Engineering Tongji University Shanghai Institute of Pollution Control and Ecological Security Centre for the Technology Research and Training on Household Waste in Small Towns & Rural Area Ministry of Housing and Urban-Rural Development

HCl and SO_2 emission is one of the major concerns related to municipal solid waste incinerator(MSWI). In this study, a material flow analysis model was developed to estimate the HCl and SO_2 concentrations in the MSWI flue gases(FGs), and their concentrations in the full-scale MSWI were monitored. The calculated concentrations of HCl and SO_2 in the FG were 770–1300 mg/Nm^3 and 150–640 mg/Nm^3, respectively, in close agreement with the monitored values. More than 99% of Cl and 92% of S from the FG were captured into solid residues by the air pollution control(APC) systems. Moreover, since only 48.4%–67.5% of Cl and 21.3%–53.4% of S were transferred to the FG from the municipal solid waste(MSW), it was more reliable to estimate the source strengths and release amounts of HCl and SO_2 in the FG based on the amounts of Cl and S in the APC residues(AR) and exhaust gas rather than in the MSW. This simple method is easily applicable and the estimated results could provide scientific basis for the appropriate design and operation of the APC systems as well as corrosion control of heat recovery systems.

关键词： Municipal solid waste incineration Acid gas Hydrogen chloride Sulfur dioxide Source strength

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incineration experiment of medical waste of novel coronavirus pneumonia(COVID-19)in a mobile animal carcass incinerator

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Waste Disposal and Sustainable Energy 2021年第2期3卷 177-183页

作者： Shaorui Zhang Yanjun Zhang Fengjun Wang Da Kang Jingjie Wang Minghao Wang Chunwei Zhang Yongtang Wang Hong Liu Baodong Zhou Yong Wu National Engineering Research Center of Power Equipment Harbin Electric Corporation Co.LtdHarbin 150028China State Key Laboratory of Efficient and Clean Coal-Fired Utility Boilers Harbin Boiler Co.LtdHarbin 150046China

incineration experiment of medical waste was carried out in a mobile animal carcass incinerator.Simulated medical waste(69%cotton,1.5%wood product,4.5%mask and 25%moisture)was used as raw material.The temperature trend of first and second combustion chamber,the operating conditions and the emission characteristics of gaseous pollutants were studied.The results indicated that the temperature of first combustion chamber can be maintained at 550-650℃ without external heating,while in the final stage a burner was used to realize the burnout of material.The temperature of the second combustion chamber was always lower than that of the first combustion after the burner stopped working.The concentration of CO emission in flue gas was high due to the low disposal efficiency of the mobile incinerator,while NOX and SO2 emission concentrations were far below the standard limit value(GB 18484-2001).

关键词： Medical waste incineration Temperature fluctuation Furnace condition Gaseous pollutants emission

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Physical and mechanical properties of municipal solid waste incineration residues with cement and coal fly ash using X-ray Computed Tomography scanners

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Frontiers of Structural and Civil Engineering 2019年第3期13卷 640-652页

作者： Toshifumi MUKUNOKI Ta Thi HOAI Daisuke FUKUSHIMA Teppei KOMIYA Takayuki SHIMAOKA Faculty of Advanced Science and Technology Graduate School of Kumamoto UniversityKumamoto city 860-8555Japan Graduate school of Science and Technology Kumamoto UniversityKumamoto city 860-8555Japan Faculty of Geology VNU University of ScienceVietnam National University Hanoi334 Nguyen TraiHanoiVietnam Water and Material Cycles System Faculty of EngineeringKyushu UniversityFukuoka city 819-0395Japan

A significant volume of Municipal Solid Waste incineration bottom ash and fly ash (i.e.,incineration residues) are commonly disposed as landfill.Meanwhile,reclamation of landfill sites to create a new land space after their closure becomes an important goal in the current fewer and fewer land availability scenario in many narrow countries.The objective of this study is to reclaim incineration residue materials in the landfill site by using cement and coal fly ash as stabilizers aiming at performing quality check as new developed materials before future construction.Indeed,physical and mechanical properties of these new materials should be initially examined at the micro scale,which is the primary fundamental for construction at larger scale.This research examines quantitative influences of using the combination of cement and coal fly ash at different ratio on the internal structure and ability of strength enhancement of incineration residues when suffering from loading.Couple of industrial and micro-focus X-ray computed tomography (CT) scanners combined with an image analysis technique were utilized to characterize and visualize the behavior and internal structure of the incineration residues-cement-coal fly ash mixture under the series of unconfined compression test and curing period effect.Nine types of cement solidified incineration residues in term of different curing period (i.e.,7,14,28 days) and coal fly ash addition content (i.e.,0%,9%,18%) were scanned before and after unconfined compression tests.It was shown that incineration residues solidified by cement and coal fly ash showed an increase in compression strength and deformation modulus with curing time and coal fly ash content.Three-dimension computed tomography images observation and analysis confirmed that solidified incineration residues including incineration bottom and fly ash as well as cement and coal fly ash have the deliquescent materials.Then,it was studied that stabilized parts play a more important role than spatial void distribution in i

关键词： mechanical property municipal solid waste incineration residues coal fly ash unconfined compression test image analysis X-Ray Computed Tomography scanners

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Recycling combustibles from aged municipal solid wastes(MSW)to improve fresh MSW incineration in Shanghai:Investigation of necessity and feasibility

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Frontiers of Environmental Science & Engineering 2010年第2期4卷 235-243页

作者： Dezhen CHEN Zhenzhen GUAN Guangyu LIU Gongming ZHOU Tong ZHU Thermal&Environmental Engineering Institute Tongji UniversityShanghai 200092China National Engineering Research Center for Urban Pollution Control Tongji UniversityShanghai 200092China

Aged municipal solid wastes(MSW)excavated from landfills and dumpsites were characterized to analyze their fraction composition,moisture content,and lower heat value(LHV).The necessity and feasibility of recycling combustibles from aged MSW to improve the incineration of fresh MSW were investigated.The results showed that combustibles in aged MSW were easily separated from other components and than LHV of the separated combustibles are higher than 11000 kJ/kg.The fresh MSW are of high moisture contents with average LHV below 6500 kJ/kg,making their stable combustion difficult to maintain in MSW incinerators.For both fresh MSW and aged MSW,plastics are the main contributor to their LHV.To improve incineration of fresh MSW that are characterized with low LHV,combustibles separated from aged MSW were made into refuse derived fuel(RDF)pellets and were then added to fresh MSW by 2%wt.–5%wt.LHV variation and air supply resistance change of the MSW layer on the incinerator grate caused by the addition of RDF was checked,and no significant changes were found.No obvious difference was observed for the‘burn-out time’between RDF pellets and fresh MSW either.RDF made from aged MSW combustibles is found to be a promising auxiliary fuel to improve the incineration of fresh MSW,and aged MSW from old landfill cells and dumpsites can be finally disposed of jointly with fresh MSW by recycling combustible from the former to be coincinerated with the latter in the incineration plants.

关键词： aged municipal solid wastes(MSW) fresh MSW lower heat value(LHV) combustibles refuse derived fuel(RDF) incineration

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Integrated utilization of municipal solid waste incineration fly ash and bottom ash for preparation of foam glass-ceramics

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Rare Metals 2019年第10期38卷 914-921页

作者： Bo Liu Qiang-Wei Yang Shen-Gen Zhang Institute for Advanced Materials and Technology University of Science and Technology Beijing

For the purpose of solid waste co-disposal and heavy metal stabilization,foam glass-ceramics were produced by using municipal solid waste incineration(MWSI)bottom ash and fly ash as main raw materials,calcium carbonate(CaCO3) as foamer and sodium phosphate(Na3PO4) as foam stabilizer.The influences of the raw material composition,foaming temperature and foaming time on the properties were investigated.Porosity,bulk density,mechanical property and leaching of heavy metals were analyzed accordingly.The product,foamed at 1150℃ for 30 min with 14% fly ash and 74% bottom ash,exhibits excellent comprehensive properties,such as high porosity(76.03%),low bulk density(0.67 g·cm-3) and high compressive strength(10.56 MPa).Moreover,the amount of leaching heavy metals,including Cr,Pb,Cu,Cd and Ni,in foam glass-ceramics is significantly lower than that of the US EPA hazardous waste thresholds.This study not only realizes the integrated utilization of bottom ash and fly ash,but also addresses a new strategy for obtaining foam glass-ceramics.

关键词： Municipal solid waste incineration ash Foamglass-ceramics Mechanical properties Stabilization

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Study on the relationship between waste classification,combustion condition and dioxin emission from waste incineration

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Waste Disposal and Sustainable Energy 2019年第2期1卷 91-98页

作者： Xiaodong Li Yunfeng Ma Mengmei Zhang Mingxiu Zhan Peiyue Wang Xiaoqing Lin Tong Chen Shengyong Lu Jianhua Yan State Key Laboratory for Clean Energy Utilization Institute for Thermal Power EngineeringZhejiang UniversityHangzhou 310027China College of Metrology and Measurement Engineering China Jiliang UniversityHangzhou 310018China

Domestic waste in China is mainly collected as a combination of different types of materials.The components are variable and complex,with very different combustion characteristics making it difficult to optimize the burning to reduce pollution.There are still some controversies about the accuracy of using carbon monoxide(CO)emission to characterize waste incineration performance.Here,we investigated the relationship between waste classification,incineration conditions and dioxin emission and concluded that the concentration of CO in flue gas could not be used as the only criterion of combustion efficiency and safety.Considering the close relationship between the formation of polychlorinated dibenzo-p-dioxins and dibenzofurans(PCDD/Fs)and products of incomplete combustion,the relatively low concentrations of CO are not a reliable indicator that an incinerator equipped with an activated carbon injection system and fabric filter could achieve the national standards for PCDD/F emission.The goal,therefore,is not only to lower the emission of PCDD/Fs and other pollutants through clas-sifying the waste components at the source,but also to reduce the need for the treatment of incinerated waste to protect the environment and to increase the power generation efficiency of municipal solid waste incineration(MSWI)plants.As the demand for waste disposal continues to rapidly increase,the need for a safe waste incineration system with dioxin emission controls makes the classification of waste an indispensable part of future MSWI systems.

关键词： incineration Waste classification CO Dioxin Emission

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Hydration Kinetics of Municipal Solid Wastes incineration(MSWI) Fly Ash-Cement

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Journal of Wuhan University of Technology(Materials Science) 2019年第3期34卷 596-603页

作者：阚黎黎 ZHANG Li SHI Huisheng School of Environment and Architecture University of Shanghai for Science and TechnologyShanghai200093China Key Laboratory of Advanced Civil Engineering Materials of Education Ministry Tongji UniversityShanghai200092China

Hydration heat behavior and kinetics of blended cement containing up to 20% MSWI fly ash were investigated based on its hydration heat evolution rate measured by isothermal calorimeter. Kinetics parameters, N and K, and hydration degree, Ca(OH)2 content, were also calculated and analyzed. According to the experimental results, the induction period was elongated, the second heat evolution peak was in advance, and the third hydration heat peak could be detected due to MSWI fly ash pozzolanic reaction. The hydration reaction rate was controlled by nucleation kinetics in the acceleration period and then by diffusion in the decay period, but in the deceleration period, the hydration experienced a dual controlling reaction of autocatalytic chemical reaction and diffusion. The hydration rate of blended cement was faster. Ca(OH)2 content increased before 14 days.

关键词： municipal solid waste incineration (MSWI) fly ash hydration heat kinetics hydration degree

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Volatilization of heavy metals during incineration of municipal solid wastes

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Journal of Environmental Sciences 2004年第4期16卷 635-639页

作者： SUNLu-shi S.Abanades J.D.Lu G.Flamant D.Gauthier StateKeylaboratoryofCoalCombustion HuazhongUniversityofScienceandTechnologyWuhan430074China InstitutdeScienceetdeG6niedesMat6riauxetProc6d6s（CNRS-IMP） BP50deillo66125Font-RomeuCedexFrance

incineration experiments with MSW, which had been impregnated with heavy metals, were presented to obtain information on the volatilization behavior of the elements cadmium(Cd), lead(Pb), and zinc(Zn) under different conditions. Experiments were carried out in a bubbling fluid bed system connected to a customized inductively coupled plasma optical emission spectroscopy(ICP-OES) for analyzing metals in the flue gas. The results indicated that the combustion temperature, the gas atmosphere, and the chlorine content in the flue gas could affect the volatilization behavior of heavy metals. In the fluidized bed combustion, a large surface area was provided by the bed sand particles, and they may act as absorbents for the gaseous ash-forming compound. Comparer with the metals Cd and Pb, the vaporization of Zn was low. The formation of stable compounds such as ZnO·Al 2O 3 could greatly decrease the metals volatilization. The presence of chlorine would enhance the volatilization of heavy metals by increasing the formation of metal chlorides. However, when the oxygen content was high, the chlorinating reaction was kinetically hindered, which heavy metals release would be delayed.

关键词： municipal solid waste incineration heavy metal emission fluidized bed

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Development and prospects of municipal solid waste (MSW) incineration in China

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Frontiers of Environmental Science & Engineering 2008年第1期2卷 1-7页

作者： Yongfeng NIE Department of Environmental Science and Engineering Tsinghua UniversityBeijing 100084China

With the lack of space for new landfills,muni-cipal solid waste(MSW)incineration is playing an increasingly important role in municipal solid waste man-agement in China.The literatures on certain aspects of incineration plants in China are reviewed in this paper,including the development and status of the application of MSW incineration technologies,the treatment of leachate from stored MSW,air pollution control technologies,and the status of the fly-ash control method.Energy policy and its promotion of MSW-to-energy conversion are also elucidated.

关键词： municipal solid waste incineration air pol-lution control stoker fluidized bed

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