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Treatment of landfill waste, leachate and landfill gas: A review

Hecham OMAR, Sohrab ROHANI

《化学科学与工程前沿(英文)》 2015年 第9卷 第1期   页码 15-32 doi: 10.1007/s11705-015-1501-y

摘要: This review aims at the treatment of the entire landfill, including the waste mass and the harmful emissions: leachate and landfill gas. Different landfill treatments (aerobic, anaerobic and semi-aerobic bioreactor landfills, dry-tomb landfills), leachate treatments (anaerobic and aerobic treatments, anammox, adsorption, chemical oxidation, coagulation/flocculation and membrane processes) and landfill gas treatments (flaring, adsorption, absorption, permeation and cryogenic treatments) are reviewed. Available information and the gaps present in current knowledge is summarized. The most significant areas to expand are landfill waste treatments, which in recent years has begun to grow but there is an opportunity for much more. Another area to explore is the treatment of landfill gas, a very large field to which not much effort has been put forth. This review is to compare different treatment methods and give direction to future research.

关键词: landfill     aerobic     anaerobic     leachate     landfill gases     municipal solid waste    

Indicating landfill stabilization state by using leachate property from Laogang Refuse Landfill

LOU Ziyang,CHAI Xiaoli,ZHAO Youcai,SONG Yu,ZHU Nanwen,JIA Jinping

《环境科学与工程前沿(英文)》 2014年 第8卷 第3期   页码 405-410 doi: 10.1007/s11783-013-0565-5

摘要: Variation and evolution process of leachate can be applied as a reference for landfill stabilization phase. In this work, leachates with different ages were collected from Laogang Refuse Landfill, and characterized with 14 key parameters. Simultaneously, principal component analysis (PCA) was applied to develop a synthetic parameter-F based on these 14 parameters, and a logarithm equation was simulated for the landfill stabilization process finally. It was predicted that leachates would meet Class I and Class II in standard for pollution control on the landfill site of municipal solid waste (GB 16889-1997) after 32 years and 22 years disposal under the natural attenuation in the humid and warm southern areas of China, respectively. The predication of landfill state would be more accurate and useful according to the synthetic parameter of leachate from a working landfill.

关键词: landfill stabilization     leachate evolution     principal component analysis    

Taxonomic and functional variations in the microbial community during the upgrade process of a full-scale landfillleachate treatment plant – from conventional to partial nitrification-denitrification

Binbin Sheng, Depeng Wang, Xianrong Liu, Guangxing Yang, Wu Zeng, Yiqing Yang, Fangang Meng

《环境科学与工程前沿(英文)》 2020年 第14卷 第6期 doi: 10.1007/s11783-020-1272-7

摘要: Abstract • Upgrade process was investigated in a full-scale landfill leachate treatment plant. • The optimization of DO can technically achieve the shift from CND to PND process. • Nitrosomonas was mainly responsible for ammonium oxidation in PND system. • An obviously enrichment of Thauera was found in the PND process. • Enhanced metabolic potentials on organics was found during the process update. Because of the low access to biodegradable organic substances used for denitrification, the partial nitrification-denitrification process has been considered as a low-cost, sustainable alternative for landfill leachate treatment. In this study, the process upgrade from conventional to partial nitrification-denitrification was comprehensively investigated in a full-scale landfill leachate treatment plant (LLTP). The partial nitrification-denitrification system was successfully achieved through the optimizing dissolved oxygen and the external carbon source, with effluent nitrogen concentrations lower than 150 mg/L. Moreover, the upgrading process facilitated the enrichment of Nitrosomonas (abundance increased from 0.4% to 3.3%), which was also evidenced by increased abundance of amoA/B/C genes carried by Nitrosomonas. Although Nitrospira (accounting for 0.1%–0.6%) was found to stably exist in the reactor tank, considerable nitrite accumulation occurred in the reactor (reaching 98.8 mg/L), indicating high-efficiency of the partial nitrification process. Moreover, the abundance of Thauera, the dominant denitrifying bacteria responsible for nitrite reduction, gradually increased from 0.60% to 5.52% during the upgrade process. This process caused great changes in the microbial community, inducing continuous succession of heterotrophic bacteria accompanied by enhanced metabolic potentials toward organic substances. The results obtained in this study advanced our understanding of the operation of a partial nitrification-denitrification system and provided a technical case for the upgrade of currently existing full-scale LLTPs.

关键词: Landfill leachate     Process upgrade     Partial nitrification-denitrification     Bacterial community     Metagenomics    

Optimization of process parameters for mature landfill leachate pretreatment using MAP precipitation

Wei LI, Xiaowen DING, Min LIU, Yuewen GUO, Lei LIU

《环境科学与工程前沿(英文)》 2012年 第6卷 第6期   页码 892-900 doi: 10.1007/s11783-012-0440-9

摘要: Chemical precipitation is a useful technology as a pretreatment to treat mature landfill leachate with high concentrations of ammonium-nitrogen ( ) and refractory organic compounds. Orthogonal experiments and factorial experiments were carried out to determine the optimal conditions enhancing the magnesium ammonium phosphate (MAP) precipitation process, and the experimental results demonstrated that the removal rate of was more than 85% when MgO and NaH PO ·2H O were applied as external sources of magnesium and phosphorous under the optimal conditions that molar ratio n(Mg)∶n(N)∶n(P) = 1.4∶1∶0.8, reaction time 60 min, original pH of leachate and settling time 30 min. In the precipitation process, pH could be maintained at the optimal range of 8–9.5 because MgO could release hydroxide ions to consume hydrogen ions. Calcium ions and carbonate ions existed in the leachate could affect the precipitation process, which resulted in the decrease of removal efficiency. The residues of MAP sediments decomposed by heating under alkaline conditions can be reused as the sources of phosphorous and magnesium for the removal of high concentrations of , and up to 90% of ammonium could be released under molar ratio of n[OH]∶n[MAP] = 2.5∶1, heating temperature 90°C and heating time 2h.

关键词: magnesium ammonium phosphate precipitation     mature landfill leachate     optimization     ammonium-nitrogen    

Characterization of humic substances in bio-treated municipal solid waste landfill leachate

Guangxia QI, Dongbei YUE, Yongfeng NIE

《环境科学与工程前沿(英文)》 2012年 第6卷 第5期   页码 711-716 doi: 10.1007/s11783-012-0421-z

摘要: Considerable organic matter remains in municipal solid waste landfill leachate after biological treatments. Humic substances (HSs) dominate the organic matter in bio-treated landfill leachate. In this study, the HSs from landfill leachate treated by membrane bioreactor (MBR-HSs) were analyzed via elemental analysis, ultraviolet-visible spectroscopy, Fourier transform infrared spectroscopy, and charge polarized magic-angle spinning- C-nuclear magnetic resonance. The characteristic absorption in the UV wavelength range indicated the presence of high C=C and C=O double bonds within the MBR-HSs. Compared with commercial HSs, MBR-HSs had lower carbon content [48.14% for fulvic acids (FA) and 49.52% for humic acids (HA)], higher nitrogen content (4.31% for FA and 6.16% for HA), lower aromatic structure content, and higher carbohydrate and carboxylic atoms of carbon content. FA predominantly had an aliphatic structure, and HA had less condensed or substituted aromatic ring structures than natural HA. The aromatic carbon content of MBR-HSs was lower than that of humus-derived HSs but higher than that of waste-derived HSs, indicating that MBR-HSs appeared to be more similar to humus-derived HSs than waste-derived HA.

关键词: bio-treated landfill leachate     humic substances     elemental analysis     spectroscopic characteristics    

Performance of landfill leachate treatment system with disc-tube reverse osmosis units

WANG Baozhen, LIU Shuo, LIU Yanping, LI Xiujin

《环境科学与工程前沿(英文)》 2008年 第2卷 第1期   页码 24-31 doi: 10.1007/s11783-008-0024-x

摘要: Reverse osmosis system with the disc-tube module (DT-RO) was applied to treat landfill leachate on full scale at the Changshengqiao Sanitary Landfill, Chongqing City, China. In the first six-mouth operation phase, the treatment performance of DT-RO system had been excellent and stable. The removal rate of chemical oxygen demand (COD), total organic carbon (TOC), electrical conductivity (EC), and ammonia nitrogen (NH-N) reached 99.2–99.7%, 99.2%, 99.6%, and over 98%, respectively. The rejection of Ca, Ba, and Mg was over 99.9%, respectively. Suspended solid (SS) was not detected in product water. Effective methods had been adopted to control membrane fouling, of which chemical cleaning is of utmost importance to guarantee the long smooth operation of the DT-RO system. The DT-RO system is cleaned in turns with Cleaner A and Cleaner C. At present, the 1st stage cleaning cycle by Cleaner A and Cleaner C is conducted every 100 and 500 h, respectively, depending on raw the water quality.

关键词: chemical cleaning     product     organic     nitrogen     Effective    

Preparation of adsorptive nanoporous membrane using powder activated carbon: Isotherm and thermodynamic studies

Majid Peyravi

《化学科学与工程前沿(英文)》 2020年 第14卷 第4期   页码 673-687 doi: 10.1007/s11705-019-1800-9

摘要: Adsorptive polyethesulfone (PES) membranes were prepared by intercalation of powder activated carbon (PAC) with and without functionalization. Accordingly, PAC was aminated with 1,5-diamino-2-methylpentane, and the physicochemical properties of the functionalized PAC were analyzed. Intercalation of PAC within the PES scaffold changed the porosity and mean pore size of the aminated membrane (AC-NH ) from 52.6% to 92.5% and from 22.6 nm to 3.5 nm, respectively. The effect of temperature on the performance of the modified membranes was monitored by the flux and chemical oxygen demand (COD) removal of leachate. At ambient temperature, the COD removal of the neat, AC-containing, and AC-NH membranes was 47%, 52%, and 58.5%, respectively. A similar increment was obtained for the membrane flux, which was due to the synergistic effect of the high porosity and large number of hydrophilic functional groups. The experimental leachate adsorption data were analyzed by Langmuir, Freundlich, and Dubinin- Radushkevich isotherm models. For all membranes, the significant thermodynamic parameters ( , , and ) were calculated and compared. The isosteric heat of adsorption was lower than 80 kJ∙mol , indicating that the interaction between the membranes and the leachate is mainly physical, involving weak van der Waals forces.

关键词: amine functionality     nanoporous membrane     adsorption isotherm     thermodynamic parameters     landfill leachate    

MBR-NF工艺在垃圾渗滤液处理中的应用

陆继来,黄娟,王惠中,张利民,夏明芳,李月中,任洪强

《中国工程科学》 2008年 第10卷 第10期   页码 61-63

摘要:

报告了采用膜生物反应器(MBR)—纳滤(NF)组合工艺处理高浓度垃圾渗滤液,该工艺充分发挥了MBR和NF单元的功能互补性,运行实践表明,对COD和氨氮的平均去除率均达99.5 %,出水满足《生活垃圾填埋污染控制标准》的一级标准,运行费用(含折旧)为19.55元/m3,具有较明显的技术经济优势。

关键词: 垃圾渗滤液     膜生物反应器     纳滤    

不同类型渗滤液中微塑料污染的新见解——丰度、特征和潜在来源 Article

张蕾, 赵文涛, 张亮, 蔡震霄, 严瑞琪, 俞霞, Damià Barceló, 隋倩

《工程(英文)》 2024年 第37卷 第6期   页码 62-68 doi: 10.1016/j.eng.2024.02.008

摘要:

城市生活垃圾(MSW)是废塑料的重要归宿。在垃圾处置过程中,大塑料碎片会被分解成微塑料(MPs)并释放到渗滤液中。然而,现有研究仅关注垃圾填埋场渗滤液,其他类型渗滤液中MPs存在特征尚不清楚。因此,本研究分析了来自中国最大固体废物处置中心的垃圾填埋场渗滤液、干垃圾渗滤液和湿垃圾渗滤液三种类型渗滤液中MPs丰度及特征。结果表明,不同类型渗滤液中MPs平均丰度为(129 ± 54)到(1288 ± 184)particles·L−1,湿垃圾渗滤液中MPs丰度最高(p < 0.05)。不同类型渗滤液中聚合物类型具有差异,其中聚乙烯(PE)和碎片分别是所有渗滤液中主要的聚合物类型和形状。此外,条件破碎模型表明垃圾填埋过程对渗滤液中MPs的尺寸分布有较大影响,垃圾填埋场渗滤液中小尺寸MPs(20~100 μm)所占比例(> 80%)高于其他渗滤液。研究首次讨论不同类型渗滤液中MPs来源的研究,研究结果有助于MSW处置过程中MPs污染控制。

关键词: 微塑料     垃圾填埋场渗滤液     干垃圾渗滤液     湿垃圾渗滤液     来源    

剩余污泥有机质资源回收利用原位驱动晚期垃圾渗滤液深度脱氮——一种具有显著能源优势的创新生物技术 Article

张方斋, 任尚, 梁浩然, 王兆志, 严颖, 王嘉辉, 彭永臻

《工程(英文)》 2024年 第34卷 第3期   页码 120-132 doi: 10.1016/j.eng.2023.03.005

摘要:

循环经济背景下,剩余污泥生物质能源的可持续回收利用引发广泛关注。本研究提出了一种基于游离亚硝酸(FNA)的创新生物技术,通过耦合短程硝化、发酵和反硝化过程(PN/DN–F/DN)不仅完成剩余活性污泥(WAS)废弃生物质能源回收利用,同时驱动晚期垃圾渗滤液深度脱氮。首先,晚期垃圾渗滤液氨氮[(1708.5 ± 142.9) mg·L−1]在短程硝化耦合反硝化序批式反应器(PN/DN-SBR)好氧段被氧化为亚硝态氮,亚硝态氮累积率高达95.4%±2.5%。PN/DN-SBR出水[NO2–N = (1196.9 ± 84.2) mg·L−1]与外源浓缩剩余活性污泥[挥发性固体浓度= (15119.8±2484.2) mg·L−1]共同泵送至缺氧反应器,用于发酵耦合反硝化(F/DN-SBR)。游离亚硝酸作为亚硝态氮的质子化形式,通过强烈的生物抑制作用将污泥有机质转化为高品质碳源,被反硝化细菌捕获利用,进而推动氮氧化物的还原过程。该创新技术实现了 4.89 kg·m−3·d−1超高污泥减量速率和 0.46 kg·m−3·d−1 脱氮速率。最后,富含有机物的 F/DN-SBR 出水回流至 PN/DN-SBR 后置缺氧阶段进行二次反硝化脱氮。PN/DN-F/DN系统连续运行 175 天后,每个运行周期平均回收 19350.6 mg 有机物(以COD计),脱氮效率为 95.2%,污泥减量率为 53.4%。以等效能源总量计算,每处理1吨剩余污泥可产生291.8 kW·h当量能源,对促进污水处理领域从能源消耗到能源中和模式的范式转变具有重要意义。

关键词: 剩余污泥     生物质资源回收     污水污泥协同处理     晚期垃圾渗滤液     游离亚硝酸    

Degradation of refractory organics in concentrated leachate by the Fenton process: Central composite

Senem Yazici Guvenc, Gamze Varank

《环境科学与工程前沿(英文)》 2021年 第15卷 第1期 doi: 10.1007/s11783-020-1294-1

摘要: Abstract • 90% total COD, 95.3% inert COD and 97.2% UV254 were removed. • High R2 values (over 95%) for all responses were obtained with CCD. • Operational cost was calculated to be 0.238 €/g CODremoved for total COD removal. • Fenton oxidation was highly-efficient method for inert COD removal. • BOD5/COD ratio of leachate concentrate raised from 0.04 to 0.4. The primary aim of this study is inert COD removal from leachate nanofiltration concentrate because of its high concentration of resistant organic pollutants. Within this framework, this study focuses on the treatability of leachate nanofiltration concentrate through Fenton oxidation and optimization of process parameters to reach the maximum pollutant removal by using response surface methodology (RSM). Initial pH, Fe2+ concentration, H2O2/Fe2+ molar ratio and oxidation time are selected as the independent variables, whereas total COD, color, inert COD and UV254 removal are selected as the responses. According to the ANOVA results, the R2 values of all responses are found to be over 95%. Under the optimum conditions determined by the model (pH: 3.99, Fe2+: 150 mmol/L, H2O2/Fe2+: 3.27 and oxidation time: 84.8 min), the maximum COD removal efficiency is determined as 91.4% by the model. The color, inert COD and UV254 removal efficiencies are determined to be 99.9%, 97.2% and 99.5%, respectively, by the model, whereas the total COD, color, inert COD and UV254 removal efficiencies are found respectively to be 90%, 96.5%, 95.3% and 97.2%, experimentally under the optimum operating conditions. The Fenton process improves the biodegradability of the leachate NF concentrate, increasing the BOD5/COD ratio from the value of 0.04 to the value of 0.4. The operational cost of the process is calculated to be 0.238 €/g CODremoved. The results indicate that the Fenton oxidation process is an efficient and economical technology in improvement of the biological degradability of leachate nanofiltration concentrate and in removal of resistant organic pollutants.

关键词: Concentrated leachate     Fenton oxidation     Central composite design     Biodegradability     Inert COD    

Modeling and simulation of landfill gas production from pretreated MSW landfill simulator

Rasool Bux MAHAR,Abdul Razaque SAHITO,Dongbei YUE,Kamranullah KHAN

《环境科学与工程前沿(英文)》 2016年 第10卷 第1期   页码 159-167 doi: 10.1007/s11783-014-0685-6

摘要: The cumulative landfill gas (LFG) production and its rate were simulated for pretreated municipal solid waste (MSW) landfill using four models namely first order exponential model, modified Gompertz model, single component combined growth and decay model and Gaussian function. Considering the behavior of the pretreated MSW landfill, a new multi component model was based on biochemical processes that occurring in landfilled pretreated MSW. The model was developed on the basis of single component combined growth and decay model using an anaerobic landfill simulator reactor which treats the pretreated MSW. It includes three components of the degradation i.e. quickly degradable, moderately degradable and slowly degradable. Moreover, the developed model was statistically analyzed for its goodness of fit. The results show that the multi components LFG production model is more suitable in comparison to the simulated models and can efficiently be used as a modeling tool for pretreated MSW landfills. The proposed model is likely to give assistance in sizing of LFG collection system, generates speedy results at lower cost, improves cost-benefit analysis and decreases LFG project risk. It also indicates the stabilization of the landfill and helps the managers in the reuse of the landfill space. The proposed model is limited to aerobically pretreated MSW landfill and also requires the values of delay times in LFG productions from moderately and slowly degradable fractions of pretreated MSW.

关键词: combine growth and decay model     pretreated municipal solid waste (MSW)     multi component landfill gas (LFG) model    

Modified landfill gas generation rate model of first-order kinetics and two-stage reaction

Jiajun CHEN , Hao WANG , Na ZHANG ,

《环境科学与工程前沿(英文)》 2009年 第3卷 第3期   页码 313-319 doi: 10.1007/s11783-009-0025-4

摘要: This investigation was carried out to establish a new domestic landfill gas (LFG) generation rate model that takes into account the impact of leachate recirculation. The first-order kinetics and two-stage reaction (FKTSR) model of the LFG generation rate includes mechanisms of the nutrient balance for biochemical reaction in two main stages. In this study, the FKTSR model was modified by the introduction of the outflow function and the organic acid conversion coefficient in order to represent the in-situ condition of nutrient loss through leachate. Laboratory experiments were carried out to simulate the impact of leachate recirculation and verify the modified FKTSR model. The model calibration was then calculated by using the experimental data. The results suggested that the new model was in line with the experimental data. The main parameters of the modified FKTSR model, including the LFG production potential (), the reaction rate constant in the first stage (), and the reaction rate constant in the second stage () of 64.746 L, 0.202 d, and 0.338 d, respectively, were comparable to the old ones of 42.069 L, 0.231 d, and 0.231 d. The new model is better able to explain the mechanisms involved in LFG generation.

关键词: landfill gas (LFG)     generation rate model     first-order kinetics     two-stage reaction     outflow function    

Anaerobic treatment of fresh leachate from a municipal solid waste incinerator by upflow blanket filter

Pinjing HE, Min LI, Suyun XU, Liming SHAO,

《环境科学与工程前沿(英文)》 2009年 第3卷 第4期   页码 404-411 doi: 10.1007/s11783-009-0149-6

摘要: This paper describes the feasibility of fresh leachate treatment by an upflow blanket filter (UBF). Through dilution and partial effluent recycling, the organic loading rates increased from 0.51to 14.56kg COD/(m·d), meanwhile the corresponding hydraulic retention time decreased from 9.0d to 3.6d. The reactor was able to achieve steady-state within 80d. Based on the distribution of COD fluxes in the process, it was concluded that anabolism was the main pathway of COD removal in the initial phase (1―33d), accounting for 57%―85% of total COD removed. As the anaerobic consortium of bacteria reached steady-state (after 70―86d), the majority of COD removed was transformed into methane, because the specific methane yield was close to the theoretical value (0.36L CH/(g COD)).

关键词: distribution of COD fluxes     effluent recycling     leachate     methane yield     organic loading rate     upflow blanket filter    

垃圾填埋场气体产生及其模型研究

黄文雄,彭绪亚,阎利

《中国工程科学》 2006年 第8卷 第9期   页码 74-79

摘要:

对填埋气的回收利用,既能减排温室气体,又能回收能源。分析了填埋气产生的原理和过程,对目前出现的填埋场产气模型进行了分类,并系统地分析了各种产气模型的计算方法、优缺点以及适用条件,为填埋气体的大规模利用提供可靠的方法。

关键词: 填埋气     模型     产气速率     产气量     甲烷    

标题 作者 时间 类型 操作

Treatment of landfill waste, leachate and landfill gas: A review

Hecham OMAR, Sohrab ROHANI

期刊论文

Indicating landfill stabilization state by using leachate property from Laogang Refuse Landfill

LOU Ziyang,CHAI Xiaoli,ZHAO Youcai,SONG Yu,ZHU Nanwen,JIA Jinping

期刊论文

Taxonomic and functional variations in the microbial community during the upgrade process of a full-scale landfillleachate treatment plant – from conventional to partial nitrification-denitrification

Binbin Sheng, Depeng Wang, Xianrong Liu, Guangxing Yang, Wu Zeng, Yiqing Yang, Fangang Meng

期刊论文

Optimization of process parameters for mature landfill leachate pretreatment using MAP precipitation

Wei LI, Xiaowen DING, Min LIU, Yuewen GUO, Lei LIU

期刊论文

Characterization of humic substances in bio-treated municipal solid waste landfill leachate

Guangxia QI, Dongbei YUE, Yongfeng NIE

期刊论文

Performance of landfill leachate treatment system with disc-tube reverse osmosis units

WANG Baozhen, LIU Shuo, LIU Yanping, LI Xiujin

期刊论文

Preparation of adsorptive nanoporous membrane using powder activated carbon: Isotherm and thermodynamic studies

Majid Peyravi

期刊论文

MBR-NF工艺在垃圾渗滤液处理中的应用

陆继来,黄娟,王惠中,张利民,夏明芳,李月中,任洪强

期刊论文

不同类型渗滤液中微塑料污染的新见解——丰度、特征和潜在来源

张蕾, 赵文涛, 张亮, 蔡震霄, 严瑞琪, 俞霞, Damià Barceló, 隋倩

期刊论文

剩余污泥有机质资源回收利用原位驱动晚期垃圾渗滤液深度脱氮——一种具有显著能源优势的创新生物技术

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