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Waste Management

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https://www.readbyqxmd.com/read/28228361/a-measurement-of-the-effectiveness-and-efficiency-of-pre-disaster-debris-management-plans
#1
Julia Crowley
Disaster debris management operations make up a significant portion of recovery expenses. The following study aims to examine how the presence of a plan makes disaster debris management effective and efficient. Ninety-five counties in the United States who received major disaster declarations between 2012 and 2015 were surveyed to examine the quality of their debris management processes. Forty-nine of these counties had debris management plans while forty-six did not. Statistical tests were conducted to address discrepancies in the effectiveness and efficiency of the debris management processes between the two groups...
February 19, 2017: Waste Management
https://www.readbyqxmd.com/read/28228360/earthworms-change-the-quantity-and-composition-of-dissolved-organic-carbon-and-reduce-greenhouse-gas-emissions-during-composting
#2
Abebe Nigussie, Sander Bruun, Andreas de Neergaard, Thomas W Kuyper
Dissolved organic carbon (DOC) has recently been proposed as an indicator of compost stability. We assessed the earthworms' effect on DOC content and composition during composting, and linked compost stability to greenhouse gas emissions and feeding ratio. Earthworms reduced total DOC content, indicating larger stability of vermicompost than of thermophilic compost. The concentrations of humic acid and fulvic acid were reduced by earthworms, whereas there was no significant effect on hydrophobic neutrals and hydrophilics...
February 19, 2017: Waste Management
https://www.readbyqxmd.com/read/28228359/influence-of-process-parameters-on-the-extraction-of-soluble-substances-from-ofmsw-and-methane-production
#3
Rosalinda Campuzano, Simón González-Martínez
Microorganisms involved in anaerobic digestion require dissolved substrates to transport them through the cell wall to different processing units and finally to be disposed as waste, such as methane and carbon dioxide. In order to increase methane production, this work proposes to separate the soluble substances from OFMSW and analyse methane production from extracts and OFMSW. Using water as solvent, four extraction parameters were proposed: (1) Number of consecutive extractions, (2) Duration of mixing for every consecutive extraction, (3) OFMSW to water mass ratios 1:1, 1:2, and 1:3 and, (4) The influence of temperature on the extraction process...
February 19, 2017: Waste Management
https://www.readbyqxmd.com/read/28228358/energetic-utilisation-of-refuse-derived-fuels-from-landfill-mining
#4
Martin Rotheut, Peter Quicker
The residence of municipal solid waste within a landfill body results in a significant change of material properties. Experiences with the energetic utilisation of the burnable fractions from formerly landfilled waste are hardly documented, the influence of refuse derived fuels (RDF) from such materials on the performance of modern waste-to-energy plants is not sufficiently described in scientific literature. Therefore this study focuses on the energetic utilisation of refuse derived fuel from landfilled waste, processed in a mechanical waste treatment facility, and the impact of the material on the operation of the incineration plant...
February 19, 2017: Waste Management
https://www.readbyqxmd.com/read/28223080/novel-process-combining-anaerobic-aerobic-digestion-and-ion-exchange-resin-for-full-recycling-of-cassava-stillage-in-ethanol-fermentation
#5
Xinchao Yang, Ke Wang, Huijun Wang, Jianhua Zhang, Zhonggui Mao
A novel cleaner ethanol production process has been developed. Thin stillage is treated initially by anaerobic digestion followed by aerobic digestion and then further treated by chloride anion exchange resin. This allows the fully-digested and resin-treated stillage to be completely recycled for use as process water in the next ethanol fermentation batch, which eliminates wastewater discharges and minimizes consumption of fresh water. The method was evaluated at the laboratory scale. Process parameters were very similar to those found using tap water...
February 17, 2017: Waste Management
https://www.readbyqxmd.com/read/28223079/pie-waste-a-component-of-food-waste-and-a-renewable-substrate-for-producing-ethanol
#6
Margaret Magyar, Leonardo da Costa Sousa, Singaram Jayanthi, Venkatesh Balan
Sugar-rich food waste is a sustainable feedstock that can be converted into ethanol without an expensive thermochemical pretreatment that is commonly used in first and second generation processes. In this manuscript we have outlined the pie waste conversion to ethanol through a two-step process, namely, enzyme hydrolysis using commercial enzyme products mixtures and microbial fermentation using yeast. Optimized enzyme cocktail was found to be 45% alpha amylase, 45% gamma amylase, and 10% pectinase at 2.5mg enzyme protein/g glucan produced a hydrolysate with high glucose concentration...
February 17, 2017: Waste Management
https://www.readbyqxmd.com/read/28223078/effects-of-total-solids-content-on-performance-of-sludge-mesophilic-anaerobic-digestion-and-dewaterability-of-digested-sludge
#7
Dong An, Tianfeng Wang, Qi Zhou, Chaosheng Wang, Qiyong Yang, Bingjie Xu, Qingfang Zhang
The role of total solids (TS) content on sludge mesophilic anaerobic digestion (AD) was investigated in batch reactors. A range of TS below 10% was evaluated with two replicates. The volumetric biogas production rate (VBPR) increased with increasing initial TS. On day 5, VBPR increased from 133.2±11.2mLL(-1)d(-1) at TS 2% to 1111.7±58.1mLL(-1)d(-1) at TS 10%. The ultimate biogas yield (P) firstly increased and then decreased with the increasing TS. The greatest P was 246.8mLg(-1)-VSadded at TS 8%. The corresponding free ammonia nitrogen (FAN) and total ammonia nitrogen (TAN) were 84...
February 17, 2017: Waste Management
https://www.readbyqxmd.com/read/28223077/did-municipal-solid-waste-landfill-have-obvious-influence-on-polychlorinated-dibenzo-p-dioxins-and-polychlorinated-dibenzofurans-pcdd-fs-in-ambient-air-a-case-study-in-east-china
#8
Jiafu Li, Chong Wang, Lei Du, Zhiwei Lv, Xiaonan Li, Xuepeng Hu, Zhiguang Niu, Ying Zhang
Municipal solid waste (MSW) landfill was a main way to disposal of MSW and almost 95% of MSW was disposed by landfills in the world. In order to understand the influence of MSW landfill on polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) in surrounding atmosphere, 42 ambient air samples were collected and analyzed from surrounding sites, background site, upwind site and downwind site of a MSW landfill in East China. The results of present study were summarized as follows. (1) The total concentrations of PCDD/Fs (∑PCDD/Fs) in ambient air from surrounding sites, background site, upwind site and downwind site were 2...
February 17, 2017: Waste Management
https://www.readbyqxmd.com/read/28223076/leaching-of-rare-earth-elements-from-fluorescent-powder-using-the-tea-fungus-kombucha
#9
Stefanie Hopfe, Katrin Flemming, Falk Lehmann, Robert Möckel, Sabine Kutschke, Katrin Pollmann
In most modern technologies such as flat screens, highly effective magnets and lasers, as well as luminescence phosphors, Rare Earth Elements (REE) are used. Unfortunately no environmentally friendly recycling process exists so far. In comparison to other elements the interaction of microorganisms with REE has been studied to a less extent. However, as REE are ubiquitously present in nature it can be assumed that microorganisms play an important role in the biogeochemistry of REE. This study investigates the potential of organic acid-producing microbes for extracting REE from industrial waste...
February 17, 2017: Waste Management
https://www.readbyqxmd.com/read/28223075/gender-perspective-on-the-factors-predicting-recycling-behavior-implications-from-the-theory-of-planned-behavior
#10
Ceren Oztekin, Gaye Teksöz, Savas Pamuk, Elvan Sahin, Dilek Sultan Kilic
This study aimed to assess the role of some socio-psychological attributes in explaining recycling behavior of Turkish university community from a gender perspective within the context of the theory of planned behavior with an additional variable (past experience). The recycling behavior of whole sample, females and males, has been examined in 3 sessions -depending on the arguments that explain gendered pattern of private and public environmental behavior and sticking to the fact why females' stronger environmental values, beliefs, and attitudes do not translate consistently into greater engagement in public behavior...
February 17, 2017: Waste Management
https://www.readbyqxmd.com/read/28215974/a-systematic-approach-to-evaluate-parameter-consistency-in-the-inlet-stream-of-source-separated-biowaste-composting-facilities-a-case-study-in-colombia
#11
E R Oviedo-Ocaña, P Torres-Lozada, L F Marmolejo-Rebellon, W A Torres-López, I Dominguez, D Komilis, A Sánchez
Biowaste is commonly the largest fraction of municipal solid waste (MSW) in developing countries. Although composting is an effective method to treat source separated biowaste (SSB), there are certain limitations in terms of operation, partly due to insufficient control to the variability of SSB quality, which affects process kinetics and product quality. This study assesses the variability of the SSB physicochemical quality in a composting facility located in a small town of Colombia, in which SSB collection was performed twice a week...
February 16, 2017: Waste Management
https://www.readbyqxmd.com/read/28215973/stabilization-of-different-starting-materials-through-vermicomposting-in-a-continuous-feeding-system-changes-in-chemical-and-biological-parameters
#12
Mercedes García-Sánchez, Hana Taušnerová, Aleš Hanč, Pavel Tlustoš
In this study the feasibility of Eisenia andrei to digest great amount of wastes including horse manure (HM), apple pomace (AP), grape pomace (GP), and digestate (DG) was monitored through a continuous-feeding system. New layers of fresh material were gradually added to form an aged-profile of layers in order to understand the interaction between earthworms and microorganisms during vermicomposting. Thus, changes in chemical and biological parameters were evaluated for 240days. The earthworm population reached maximum values in 120 d-old-layer, which was related to an increase in overall microbial biomass, assayed as dehydrogenase activity, in all of the processed materials...
February 16, 2017: Waste Management
https://www.readbyqxmd.com/read/28215972/wind-turbine-blade-waste-in-2050
#13
Pu Liu, Claire Y Barlow
Wind energy has developed rapidly over the last two decades to become one of the most promising and economically viable sources of renewable energy. Although wind energy is claimed to provide clean renewable energy without any emissions during operation, but it is only one side of the coin. The blades, one of the most important components in the wind turbines, made with composite, are currently regarded as unrecyclable. With the first wave of early commercial wind turbine installations now approaching their end of life, the problem of blade disposal is just beginning to emerge as a significant factor for the future...
February 16, 2017: Waste Management
https://www.readbyqxmd.com/read/28215971/characterization-and-inventory-of-pbdd-f-emissions-from-deca-bde-polyethylene-pe-and-metal-blends-during-the-pyrolysis-process
#14
Jun Mei, Xiuji Wang, Xiao Xiao, Ying Cai, Yuhui Tang, Pei Chen
The thermal treatment of waste electrical and electronic equipment (WEEE) is regarded as the largest potential contributor to the environmental release of polybrominated dibenzo-p-dioxins/dibenzofurans (PBDD/Fs). Herein, the pyrolysis of decabromodiphenyl ether (deca-BDE), polyethylene (PE) and metal blends was conducted to investigate the emission characteristics of PBDD/Fs at different thermal treatment conditions. The total yield of polybrominated dibenzo-p-dioxins (PBDDs) was less than that of polybrominated dibenzofurans (PBDFs) during the pyrolysis of the PE matrix and metal blends...
February 16, 2017: Waste Management
https://www.readbyqxmd.com/read/28216080/patterns-of-waste-generation-a-gradient-boosting-model-for-short-term-waste-prediction-in-new-york-city
#15
Nicholas E Johnson, Olga Ianiuk, Daniel Cazap, Linglan Liu, Daniel Starobin, Gregory Dobler, Masoud Ghandehari
Historical municipal solid waste (MSW) collection data supplied by the New York City Department of Sanitation (DSNY) was used in conjunction with other datasets related to New York City to forecast municipal solid waste generation across the city. Spatiotemporal tonnage data from the DSNY was combined with external data sets, including the Longitudinal Employer Household Dynamics data, the American Community Survey, the New York City Department of Finance's Primary Land Use and Tax Lot Output data, and historical weather data to build a Gradient Boosting Regression Model...
February 15, 2017: Waste Management
https://www.readbyqxmd.com/read/28209243/requirements-techniques-and-costs-for-contaminant-removal-from-landfill-gas
#16
REVIEW
John N Kuhn, Anthony C Elwell, Nada H Elsayed, Babu Joseph
Waste-to-energy projects are an increasingly prominent component of future energy portfolios. Landfill gas (LFG)-to-energy (LFGTE) projects are particularly important as they address greenhouse gas emissions. Contaminants in LFG may hamper these projects both from environmental and economic standpoints. The purpose of this review is to highlight key aspects (LFG composition ranges, LFG flowrates, and allowable tolerances for LFGTE technologies, performance and costs for contaminant removal by adsorption). Removal of key contaminants, H2S and siloxanes, by adsorption are surveyed in terms of adsorption capacities and regeneration abilities...
February 10, 2017: Waste Management
https://www.readbyqxmd.com/read/28190680/effect-of-waste-addition-points-on-the-chromium-leachability-of-cement-produced-by-co-processing-of-tannery-sludge
#17
Dongsheng Shen, Minrui Huang, Huajun Feng, Na Li, Yuyang Zhou, Yuyang Long
The effect of adding position for tannery sludge in a co-processing cement rotary kiln on the chromium leachability of the cement produced was assessed in laboratory scale. Cement clinkers and pastes were produced and evaluated based on analysis of the cement quality, characterization of the clinker crystalline phases, and extraction toxicity of heavy metals in the resulting cements (using the toxicity characteristic leaching procedure (TCLP) and the Chinese GB/T 30810-2014 standard). It was found that the amount of sludge added (up to 0...
February 9, 2017: Waste Management
https://www.readbyqxmd.com/read/28190679/fat-oil-and-grease-reduction-in-commercial-kitchen-ductwork-a-novel-biological-approach
#18
S Mudie, M Vahdati
Recent research has characterised emissions upon cooking a variety of foods in a commercial catering environment in terms of volume, particle size and composition. However, there has been limited focus on the deposition of solid grease in commercial kitchen ductwork, the sustainability of these systems and their implications on the heat recovery potential of kitchen ventilation extract air. This paper reviews the literature concerning grease, commonly referred to as Fat, Oils and Grease (FOG) abatement strategies and finds that many of these systems fall short of claimed performances...
February 9, 2017: Waste Management
https://www.readbyqxmd.com/read/28185852/pyrolysis-for-exploitation-of-biomasses-selected-for-soil-phytoremediation-characterization-of-gaseous-and-solid-products
#19
Paola Giudicianni, Stefania Pindozzi, Corinna Maria Grottola, Fernando Stanzione, Salvatore Faugno, Massimo Fagnano, Nunzio Fiorentino, Raffaele Ragucci
Biomasses to be used in the phytoremediation process are generally selected to match agronomic parameters and heavy metals uptake ability. A proper selection can be made greatly effective if knowledge of the properties of the residual char from pyrolysis is available to identify possible valorization routes. In this study a comparative analysis of the yields and characteristics of char obtained from slow pyrolysis of five uncontaminated biomasses (Populus nigra, Salix alba, Fraxinus oxyphylla, Eucalyptus occidentalis and Arundo donax) was carried out under steam atmosphere to better develop char porosity...
February 7, 2017: Waste Management
https://www.readbyqxmd.com/read/28185853/sustainable-management-and-utilisation-of-concrete-slurry-waste-a-case-study-in-hong-kong
#20
Md Uzzal Hossain, Dongxing Xuan, Chi Sun Poon
With the promotion of environmental protection in the construction industry, the mission to achieve more sustainable use of resources during the production process of concrete is also becoming important. This study was conducted to assess the environmental sustainability of concrete slurry waste (CSW) management by life cycle assessment (LCA) techniques, with the aim of identifying a resource-efficient solution for utilisation of CSW in the production of partition wall blocks. CSW is the dewatered solid residues deposited in the sedimentation tank after washing out over-ordered/rejected fresh concrete and concrete trucks in concrete batching plants...
February 6, 2017: Waste Management
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