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Frontiers of Environmental Science & Engineering 2016年第1期10卷 201-210页

作者： Yiying JIN Yangyang LI Fuqiang LIU School of Environment Tsinghua University Beijing 100084 China

The influences of dewatered sludge blending ratio in coal on flammability index （C） and combustion characteristic index （S） and release of sulfur dioxide （SO2）, nitrogen oxide （NOx）, carbon monoxide （CO） and heavy metals （Hg, As, Cd, Pb and Cr） were studied. The impact on combustion characteristics could be ignored if less than 20% of dewatered sludge was added in coal. Besides, emission pattern experiments of NOx, SO2, CO and heavy metals were carried out in a high-temperature tubular furnace. Results showed that the conversion rate of NOx and total emission of SO2 reduced with the increase of sludge adding ratio, and a better effect of fixing sulfur could be obtained when the blending ratio reached 30%. Concentrations and distributions of five types of heavy metals in different residues （bottom ash and fly ash） as well as in flue gas were analyzed. It was shown that the characteristics of coal and sludge, as well as the volatilization of heavy metals had a great influence on the distribution of heavy metals.

关键词： sewage sludge combustion characteristic,coal emission heavy metals

Enhancing short-term ethanol-type fermentation of waste activated sludge by adding saccharomycetes and the implications for bioenergy and resource recovery

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Journal of Environmental Sciences 2022年第3期34卷 179-189页

作者： Linke Zheng Ying Xu Hui Geng Xiaohu Dai State Key Laboratory of Pollution Control and Resource Reuse School of Environmental Science and EngineeringTongji UniversityShanghai 200092China East China Architecture Design&Research Institute Shanghai 200002China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China

Ethanol-type sludge fermentation has recently attracted much attention because it can enhance direct interspecies electron transfer and thus improve the anaerobic digestion of waste activated sludge(WAS). In this paper, the enhancement of short-term ethanol-type fermentation of WAS via adding Saccharomyces was investigated. The experimental results show that the maximum ethanol production of 1030.8 ± 20.6 mg/L was achieved, with the optimum fermentation conditions of a p H of 5.1, temperature of 26.0 ℃ and time of 8.0 hr. Although the content of volatile fatty acid(VFA) increased within 10 hr, it is one order of magnitude lower than the content of ethanol, indicating that the VFA generation did not affect the efficient production of ethanol. The analyses of changes in the microbial community during the fermentation process demonstrate that the greatest Saccharomyces activity occurred in the first 8 hr and it can play an important role in ethanol production even at a very low relative abundance. Meanwhile, most typical acid-producing bacteria were inhibited, but the hydrogenotrophic methanogens(i.e., Methanobacterium) were enriched to a certain extent. Further statistical analyses reveal that the Rhodobacter, Thermomonas, Terrimonas and Saccharomyces are responsible for ethanol production during the fermentation. However, these findings not only provide a reference for the development of enhancing ethanol-type fermentation of sludge, but also are expected to provide a new way of thinking for the efficient bioenergy and resource recovery from sludge.

关键词： Anaerobic digestion sewage sludge Methane production Ethanol production Biodegradability

Systematical analysis of sludge treatment and disposal technologies for carbon footprint reduction

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Journal of Environmental Sciences 2023年第6期128卷 224-249页

作者： Yingxin Zhao Zhifan Yang Jiaojiao Niu Zihan Du Conti Federica Zhe Zhu Kaichao Yang Yan Li Baofeng Zhao Thomas Helmer Pedersen Chunguang Liu Mutabazi Emmanuel School of Environmental Science and Engineering Tianjin UniversityTianjin 300350China Tianjin Municipal Engineering Design&Research Institute Co. Ltd.Tianjin 300380China Tianjin International Engineering Institute Tianjin UniversityTianjin 300072China Department of Energy Technology Aalborg UniversityAalborg 9220Denmark School of Environmental Science and Safety Engineering Tianjin University of TechnologyTianjin 300384China Energy Research Institute of Shandong Academy of Sciences Jinan 250014China Shandong Kailin environmental protection equipment Co. Ltd.Heze 274000China

This study aims to comprehensively analyze the Greenhouse Gases(GHGs)emissions from current sewage sludge treatment and disposal technologies(buildingmaterial,landfill,land spreading,anaerobic digestion,and thermochemical processes)based on the database of Science Citation Index(SCI)and Social Science Citation Index(SSCI)from 1998 to *** general patterns,spatial distribution,and hotspotswere provided by bibliometric analysis.A comparative quantitative analysis based on life cycle assessment(LCA)put forward the current emission situation and the key influencing factors of different *** effective GHG emissions reduction methods were proposed to mitigate climate *** showed that incineration or building materials manufacturing of highly dewatered sludge,and land spreading after anaerobic digestion have the best GHG emissions reduction *** treatment technologies and thermochemical processes have great potential for reducing *** of pretreatment effect,co-digestion,and newtechnologies(e.g.,injection of carbon dioxide,directional acidification)are major approaches to facilitate substitution emissions in sludge anaerobic *** relationship between the quality and efficiency of secondary energy in thermochemical process and GHGs emission still needs further *** sludge products generated by bio-stabilization or thermochemical processes are considered to have a certain carbon sequestration value and can improve the soil environment to control GHG *** findings are useful for future development and processes selection of sludge treatment and disposal facing carbon footprint reduction.

关键词： Bibliometrics sewage sludge Greenhouse gas Life cycle assessment sludge management

Effect of proteins,polysaccharides,and particle sizes on sludge dewaterability

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Journal of Environmental Sciences 2009年第1期21卷 83-88页

作者： SHAO Liming,HE Peipei,YU Guanghui,HE Pinjing State Key Laboratory of Pollution Control and Resources Reuse,Key Laboratory of Yangtze River Water Environment,College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China State Key Laboratory of Pollution Control and Resources Reuse Key Laboratory of Yangtze River Water Environment College of Environmental Science and Engineering Tongji University Shanghai 200092 China. E-mail: solidwaste@***

Four batch experiments of hydrolysis and acidification were carried out to investigate the distributions of proteins （PN） and polysaccharides （PS） in the sludge, the PN/PS ratio, the particle sizes, and their relationship with sludge dewaterability （as determined by capillary suction time, CST）. The sludge flocs were stratified through centrifugation- and ultrasound-based method into four fractions：（1） slime, （2） loosely bound extracellular polymeric substances （LB-EPS）, （3） tightly bound EPS （TB-EPS）, and （4） pellet. The results showed that PN was mainly partitioned in the pellet （80.7%） and TB-EPS （9.6%） fractions, while PS distributed evenly in the four fractions. During hydrolysis and acidification, PN was transferred from the pellet and TB-EPS fractions to the slime fraction, but PS had no significant transfer trends. The mean particle sizes of the sludge flocs decreased with hydrolysis and acidification. The pH had a more significant influence on the dewaterability of sludge flocs than temperature. sludge dewaterability during hydrolysis and acidification processes greatly deteriorated from 9.7 s at raw sludge to 340-450 s under alkaline conditions. However, it was just slightly increased under acidic conditions. Further investigation suggested that CST was affected by soluble PN, soluble PN/PS, and particle sizes of sludge flocs, but was affected slightly by total PN, PS, or PN/PS in the whole sludge flocs and other fractions （except slime）.

关键词： dewaterability extracellular polymeric substances particle size polysaccharides proteins sewage sludge

Co-pyrolysis of sludge and kaolin/zeolite in a rotary kiln:Analysis of stabilizing heavy metals

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Frontiers of Environmental Science & Engineering 2022年第7期16卷 21-33页

作者： Qian Li Zhaoping Zhong Haoran Du Xiang Zheng Bo Zhang Baosheng Jin Southeast University Key Laboratory of Energy Thermal Conversion and Control(Ministry of Education)Nanjing210096China

Pyrolysis is a promising technique used for treating of sewage ***,the application of pyrolysis products is limited due to the presence of heavy *** this study,sewage sludge mixed with kaolin/zeolite was pyrolyzed in a rotary kiln,aiming to improve the immobilization of heavy metals in pyrolytic *** total concentrations,speciation distributions,leaching toxicities,and potential ecological risk indices of heavy metals in pyrolysis biochar were explored to examine the effects of kaolin/zeolite and pyrolytic temperature on immobilizing heavy ***,mineral composition and surface morphology of biochar were characterized by X-ray diffraction and scanning electron microscopy to reveal the potential mechanism of immobilizing heavy *** pyrolysis temperature facilitated the stabilization of heavy metals in pyrolysis *** proportions of stable heavy metals in biochar obtained at 650℃ were 54.50%(Cu),29.73%(Zn),79.29%(Cd),68.17%(Pb)and 86.70%(Cr).Compared to sewage sludge,the potential contamination risk index of pyrolysis biochar obtained at 650℃ was reduced to 17.01,indicating a low ecological *** addition of 7%kaolin/zeolite further reduced the risk index of co-pyrolysis biochar prepared at 650℃ to 10.86/*** characterization of biochar revealed that increase in the pyrolysis temperature and incorporation of additives are conducive to the formation of stable heavy *** study demonstrates that the formation of stable mineral compounds containing heavy metals is the key to stabilizing heavy metals in pyrolysis biochar.

关键词： Co-pyrolysis sewage sludge Heavy metals Rotary kiln Immobilization mechanism

Acidogenic sludge fermentation to recover soluble organics as the carbon source for denitrification in wastewater treatment： Comparison of sludge types

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Frontiers of Environmental Science & Engineering 2018年第4期12卷 25-32页

作者： Lin Lin Ying-yu Li Xiao-yan Li Environmental Engineering Research Centre Departmelt of Civil Engineering The University of Hong Kong Pokfulam Hong Kong China Shenzhen Engineering Research Laboratory for sludge and Food Waste Treatment and Resource Recovery Graduate School at Shenzhcn Tsinghua University Shcnzhen 518055 China＊

For biological nitrogen （N） removal from wastewater, a sufficient organic carbon source is requested fbr denitrification. However. the organic carbon/nitrogen ratio in municipal wastcwatcr is becoming lower in recent years, which increases the demand for the addition of external organic carbon, e.g. methanol, in wastewater treatment. The volatile fatty acids （VFAs） produced by acidogenic fenncntation of sewage sludge can be an attractive alternative for methanol. Chemically enhanced primary sedimentation （CEPS} is an effective process that applies chemical coagulants to enhance the removal of organic pollutants and phosphorus from wastewater by sedimentation. In temls of the chemical and biological characteristics, the CEPS sludge is considerably different from the conventional primary and secondary sludge. In the present study, FeCI3 and PACI （polyalunfinum chloride） were used as the coagulants for CEPS treatment of raw sewage. The derived CEPS sludge （Fe-sludge and Al-sludge） was then processed with mcsophilic acidogenic fennentation to hydrolysc the solid organics and produce VFAs for organic carbon recovery, and the sludge acidogenesis efficiency was compared with that of the conventional primary sludge and secondary sludge. The results showed that the Fe-sludge exhibited the highest hydrolysis and acidogenesis efficiency, while the Al-sludge and secondary＇ sludge had lower hydrolysis efficiency than that of primary sludge. Utilizing ffie Fc-sludgc fermentation liquid as tbc carbon source for denitrificatiom more than 99%of nitrate removal was achieved in the main-stream wastewater treatment without any external carbon addition, instead of 35% obtained from the conventional process of primary sedimentation followed by the oxic/anoxic （O/A） treatment.

关键词： sewage sludge Chemically enhanced primary sedimentation(CEPS) Acidogenic fermentation Organic carbon recovery Nitrogen removal

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城市污泥在矿山废弃地复垦的应用探讨

生态学杂志 2001年第2期20卷 44-47,51页

作者：莫测辉蔡全英王江海吴启堂华南农业大学资源环境学院广州510642 中国科学院广州地球化学研究所广州51640

Based on the analysis of the existing problems in reclaiming abandoned mining land and their negative effect on the ecological environment,and in view of the limited factors to reclaim abandoned mining land,this paper puts forward the suggestions of using sewage sludge as an alternative in mining land *** of sewage sludge in reclamation has beneficial effects, such as increasing organic matter content, preventing soil erosion,recovering vegetation,and promoting microbial population and its activities Unfavorable factors including heavy metal and organic pollutant for applications of sewage sludge and their countermeasures are also discussed.

关键词： sewage sludge abandoned mining land reclamation.

Investigation on mechanism of phosphate removal on carbonized sludge adsorbent

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Journal of Environmental Sciences 2018年第2期30卷 335-344页

作者： Lei Zhang Junxin Liu Xuesong Guo Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China University of Chinese Academy of Sciences Beijing 100049 China

For the removal of phosphate（PO43-） from water, an adsorbent was prepared via carbonization of sewage sludge from a wastewater treatment plant： carbonized sludge adsorbent（CSA）. The mechanism of phosphate removal was determined after studying the structure and chemical properties of the CSA and its influence on phosphate removal. The results demonstrate that phosphate adsorption by the CSA can be fitted with the pseudo second-order kinetics and Langmuir isotherm models, indicating that the adsorption is single molecular layer adsorption dominated by chemical reaction. The active sites binding phosphate on the surface are composed of mineral particles containing Si/Ca/Al/Fe. The mineral containing Ca, calcite, is the main factor responsible for phosphate removal. The phosphate removal mechanism is a complex process including crystallization via the interaction between Ca2＋ and PO43-; formation of precipitates of Ca2＋, Al3＋, and PO43-; and adsorption of PO43-on some recalcitrant oxides composed of Si/Al/Fe.

关键词： sewage sludge Carbonization Phosphate removal Mechanism

Phosphine in various matrixes

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Journal of Environmental Sciences 2003年第3期15卷 339-341页

作者： HANSheng-hui WANGZi-jian ZHUANGYa-hui YUZhi-ming DIETMARGLINDEMANN NationalKeyLaboratoryofAquaticChemistry ResearchCenterforEco-EnvironmentalSciencesBeijing100085China.E-maill:zhuangyh@sun.ihep.ac.en InstituteofOceanology ChineseAcademyofOceanologyChineseAcademyofSciencesQingdao266071China InstituteofAnimalHygieneandVeterinaryPublicHealth UniversityofLeipzigD-04103LeipzigGermany

Matrix-bound phosphine was determined in the Jiaozhou Bay coastal sediment, in prawn-pond bottom soil, in the eutrophic lake Wulongtan, in the sewage sludge and in paddy soil as well. Results showed that matrix-bound phosphine levels in freshwater and coastal sediment, as well as in sewage sludge, are significantly higher than that in paddy soil. The correlation between matrix bound phosphine concentrations and organic phosphorus contents in sediment samples is discussed.

关键词： phosphine concentration sediment paddy soils sewage sludge

Phosphorus recovery from municipal and fertilizer wastewater:China's potential and perspective

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Journal of Environmental Sciences 2017年第2期29卷 151-159页

作者： Kuangxin Zhou Matthias Barjenbruch Christian Kabbe Goulven Inial Christian Remy Berlin Centre of Competence for Water Berlin 10709Germany Department of Urban Water Management Technical University of BerlinBerlin 13355Germany Research&Innovation Asia Veolia EnvironmentBeijing 10004China

Phosphorus（P） is a limited resource, which can neither be synthesized nor substituted in its essential functions as nutrient. Currently explored and economically feasible global reserves may be depleted within generations. China is the largest phosphate fertilizer producing and consuming country in the world. China’s municipal wastewater contains up to 293,163 Mg year of phosphorus, which equals approximately 5.5% of the chemical fertilizer phosphorus consumed in China. Phosphorus in wastewater can be seen not only as a source of pollution to be reduced, but also as a limited resource to be recovered. Based upon existing phosphorus-recovery technologies and the current wastewater infrastructure in China, three options for phosphorus recovery from sewage sludge, sludge ash and the fertilizer industry were analyzed according to the specific conditions in China.

关键词： Phosphorus recovery Municipal Wastewater Fertilizer Industry sewage sludge China