检索结果-南通市图书馆

Frontiers of Environmental Science & Engineering 2022年第6期16卷 91-94页

作者： Lei Li Shijie Yuan Chen Cai Xiaohu Dai State Key Laboratory of Pollution Control and Resources Reuse School of Environmental Science and EngineeringTongji UniversityShanghai 200092China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China

Methanogenesis is the last step in anaerobic digestion,which is usually a rate-limiting step in the biological treatment of organic *** low methanogenesis efficiency(low methane production rate,low methane yield,low methane content)substantially limits the development of anaerobic digestion *** pretreatment methods and bio-stimulation strategies have impacts on the entire anaerobic system and cannot directly enhance methanogenesis in a targeted manner,which was defined as“broad-acting”strategies in this ***,we discussed our opinion of methanogenesis process with insights from the electron transfer system of syntrophic partners and provided potential targeted enhancing strategy for high-efficiency electron transfer ***“precise-acting”strategies are expected to achieve an efficient methanogenesis process and enhance the bio-energy recovery of organic waste.

关键词： Methanogenesis Anaerobic digestion Enhancing strategy Electron transfer organic waste

Potential of organic waste to energy and bio-fertilizer production in Sub-Saharan Africa:a review

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

waste Disposal and Sustainable Energy 2023年第3期5卷 259-267页

作者： Isaac Rubagumya Allan John Komakech Isa Kabenge Nicholas Kiggundu Department of Agricultural and Biosystems Engineering Makerere UniversityP.O.Box 7062KampalaUganda

Many growing cities of Sub-Saharan Africa(SSA)are marred by the inefficient collection,management,disposal and reuse of organic *** purpose of this study was to review and compare the energy recovery potential as well as bio-fertilizer perspective,from the organic waste volumes generated in SSA *** on computations made with a literature review,we find that the amount of organic wastes varies across countries translating to differences in the energy and bio-fertilizer production potentials across *** wastes generated in SSA can potentially generate about 133 million GWh of energy per *** organic waste to bio-fertilizer production potentials range from 11.08 million tons to 306.26 million tons *** has the highest energy and bio-fertilizer potential among the SSA countries with a total per capita of 630 MWh/year and 306.26 million tons,*** challenges and technical considerations for energy and bio-fertilizer approaches in the management of organic waste in SSA have also been *** study is of help to the readers and strategic decision makers in understanding the contribution of bioenergy and bio-fertilizer to achieving sustainable development goals,namely,7(Affordable and Clean Energy)and 13(Climate Action)in SSA.

关键词： Sub-Saharan Africa organic waste Energy production Bio-fertilizer production Challenges

Gasification of organic waste:Parameters,Mechanism and Prediction with the Machine Learning Approach

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Renewable Materials 2023年第6期11卷 2771-2786页

作者： Feng Gao Liang Bao Qin Wang Yibin Research Institute Southwest Jiaotong UniversityYibinChina Office of Domestic Cooperation and Educational Training Management Southwest Jiaotong UniversityChengduChina School of Computer Science and Technology Xidian UniversityXi’anChina Faculty of Geosciences and Environmental Engineering Southwest Jiaotong UniversityChengduChina

Gasification of organic waste represents one of the most effective valorization pathways for renewable energy and resources recovery,while this process can be affected by multi-factors like temperature,feedstock,and steam content,making the product’s prediction *** the popularization and promotion of artificial intelligence such as machine learning(ML),traditional artificial neural networks have been paid more attention by researchers from the data science field,which provides scientific and engineering communities with flexible and rapid prediction frameworks in the field of organic waste *** this work,critical parameters including temperature,steam ratio,and feedstock during gasification of organic waste were reviewed in three scenarios including steam gasification,air gasification,and oxygen-riched gasification,and the product distribution and involved mechanism were ***,we presented the details of ML methods like regression analysis,artificial neural networks,decision trees,and related methods,which are expected to revolutionize data analysis and modeling of the gasification of organic *** outputs including the syngas yield,composition,and HHVs were discussed with a better understanding of the gasification process and ML *** review focused on the combination of gasification and ML,and it is of immediate significance for the resource and energy utilization of organic waste.

关键词： Gasification organic waste machine learning gas composition

Study on the resource utilization of high fluorine-containing organic waste through fluidized incineration

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

waste Disposal and Sustainable Energy 2022年第2期4卷 117-129页

作者： Wenhan Li Zengyi Ma Jianhua Yan Qianming Huang Xingjian Wen Zian Zhai Bochen Huang Shuang Wang Yongqiang Chen Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of ChinaChengdu610213China State Key Laboratory of Clean Energy Utilization Institute for Thermal Power EngineeringZhejiang UniversityHangzhou310027China Zhejiang Xianchuang Energy&Technology Co.Ltd Jinhua321000China

In this study,the method of fluidized incineration and water washing to recover hydrogen fluoride(HF)was proposed to dispose of high fluorine-containing organic *** resource utilization of the waste was investigated in a fluidized bed incinerator with a disposal capability of 10 t/*** evolution characteristics of fluorine,operation conditions of the incineration system,absorption coefficient for HF by water washing,and HF corrosion during combustion were *** results showed that HF and fluorocarbons were detected as the initial gaseous fluorides released during *** release of HF could be divided into three stages,in which HF was generated from the volatilization of HF in the waste and the hydrolysis of fluorine in water-soluble salts(60–220℃),oxidative decomposition of fluorinated organic components and residual carbon(220–800℃),and hydrolysis of insoluble fluorinated inorganic minerals(800–1000℃).Fluorocarbons could be destroyed through reactions with free radicals H,O,and OH or through single-molecule *** the temperature in the furnace and increasing the content of oxygen and hydrogen in the incineration materials were conducive to reducing the generation of *** sampling and analyzing the bottom slag,bag filter ash and exhaust gas during the field test,the relevant pollutant discharge could meet the national emission *** waste heat utilization of high-temperature flue gas and the recovery of hydrofluoric acid and hydrochloric acid were *** the recovery of HF by water washing,the total absorption coefficients for 1#to 4#packed absorbers were 52.38 kg/(h m^(2)),39.96 kg/(h m^(2)),5.98 kg/(h m^(2))and 3.89 kg/(h m^(2)),*** the actual operation,alumina showed good corrosion resistance to high-temperature HF and could be used as bed materials or refractory ***-temperature corrosion of HF occurred in the quenching heat exchanger,which was damaged after 6 months of continu

关键词： organic waste Fluorine Fluidized incineration Resource utilization

Recovery of organic waste with Other Biological Components for the Production of organic Fertilizer: Improved Biochar

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Geoscience and Environment Protection 2022年第3期10卷 76-83页

作者： Félicité Obono Mba Loic Foka Deffo Augustin Goudoum Department of Environmental Sciences National Advanced School of Engineering The University of Maroua Maroua Cameroon Department of Agriculture Livestock and Derived Products National Advanced School of Engineering The University of Maroua Maroua Cameroon

The study was carried out in Baham district in the West Cameroon region, as part of the recovery of organic waste with other biological components for the manufacture of an organic fertilizer (improved biochar). Through observations and a survey questionnairy submitted to 100 farmers, it appears that the majority use synthetic chemical fertilizers. Farmers using chemical fertilizers find them dangerous to their health. In addition, 58.57% of these farmers said they felt unwell after spreading these fertilizers. However, 64.28% of these farmers do not acquire PPE for reasons of financial means on the one hand and ignorance on the other hand. 54.28% of respondents using only chemical fertilizers noted declining agricultural production. The surveys also reveal that biochar (of plant origin) as a solution proposed by CIPCRE is used by a minority of farmers (21%) in the said locality on the one hand and on the other hand has limits in terms of intake nutrients for crops;this was confirmed by analyzes of the physico-chemical parameters.

关键词： organic waste Biochar Improved Biochar Sustainable Agriculture

Economic and environmental management strategies of organic waste

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Economic and environmental management strategies of organic ...

Bio-Enrichment of waste Crude Oil Polluted Soil:Amended with Bacillus 139SI and organic waste

International Conference on Environment Science and Engineering（ICESE 2011）

作者： Ferencz, A. Notari,M. Levai, P. Czegledi, M. Berde, Cs Faculty of Horticulture College of Kecskemet Kecskemet Dept. of Farm Business Management Corvinus University of Budapest Budapest Debrecen University Debrecen

Strategy management of anthropic activities must, more than ever, take in account not only the environmental legislation corpus, but the concepts and principles that are used to build the public policies. Most of the times, it considers also economical and financial procedures （taxes and grants） and technical tools analysis （systemic analysis and flows balances）. Agriculture is highly concerned because of its natural relations to environment and also because of its weight as a production /consumption chain. In most cases, spreading is used for soil restitution of nutrients but with unbalanced flows resulting in environmental impacts. It is obvious that territorial regulation of a back to soil strategy must be built on the aptitudes of soils to be amended;crops to be fertilized;farms to gain profit;neighbours to agree;natural areas and resources to be protected and exploited. What kind of natural cycle is pertinent for a specific flow? Where and how is it stored in nature?

关键词： environmental management economic strategies organic waste

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Bio-Enrichment of Waste Crude Oil Polluted Soil:Amended with...

Assessment of Municipal organic Solid waste, as a Potential Feedstock for Briquette Production in Kampala, Uganda

作者： Arezoo Dadrasnia Salmah Binti Ismail Institute of Biological Sciences Faculty of ScienceUniversity of Malaya

Biodegradation of waste crude oil contaminated soil amended by Bacillus 139 SI and used tea leaf amendments was investigated to determine the rate of hydrocarbon remediation. Previously, Bacillus 139 SI was isolated from an agricultural soil in the Serdang agricultural center, Malaysia. Within 60 days, 14% oil loss was recorded in unamended polluted autoclaved soil, while waste crude oil disappeared more rapidly in the soil amendment with both strain and organic waste, recorded above 89%. Utilizing bacteria counts were significantly higher in all amended treatments comparing to control soil. Dehydrogenase activity in soil was markedly enhanced by the application of amendments. waste crude oil composition monitored by GC/FID indicated complete degradation of n-C–C. First-order kinetic model revealed that organic waste and strain were the best of treatments, with biodegradation rate constant of 0.17 dayand half life of 4 days. The results showed there is potential for tea leaf and Bacillus 139 SI to enhance biodegradation of waste crude oil contaminated soil.

关键词： Bioaugmentation biostimulation microbial consortium organic waste waste crude oil

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Journal of Sustainable Bioenergy Systems 2020年第2期10卷 62-75页

作者： Richard Basona Abondio Allan John Komakech Robert Kyeyune Kambugu Nicholas Kiggundu Joshua Wanyama Ahamada Zziwa Samuel Kyamanywa Department of Agricultural and Biosystems Engineering Makerere University Kampala Uganda Department of Agricultural Engineering University of Juba Juba South Sudan Department of Agricultural Production Makerere University Kampala Uganda

The current shortage of energy resources coupled with environmental degradation problems resulting from deforestation in Uganda has contributed to increased demand for renewable energy resources including municipal organic solid waste and agricultural residues. However, organic waste from Municipal Solid waste (MSW) may contain contaminants that are harmful to public health and the environment. This study determined the heavy metal concentration in MSW in Kampala City, Uganda. Also, the physicochemical properties of briquettes produced from the MSW were compared with charcoal. The waste samples were collected from residential, institutional and market areas over a period of two weeks. They were then analyzed for the presence of heavy metals. Briquettes were made from the bio-waste and were subjected to calorific and proximate analysis. Results indicated that the mean concentrations of Cd, Cr, Cu, Fe, and Pb were 1.25 mg/kg, 2.04 mg/kg, 38.2 mg/kg, 3.97 mg/kg and 1.99 mg/kg respectively while Hg was not detected. The calorific values of briquettes ranged from 8.9 to 15.3 MJ/kg and were lower than those of charcoal. Heavy metal concentrations in bio-waste collected were below the permissible acceptable limits. These findings indicate that the sampled MSW does not pose a health hazard arising from the presence of such heavy metals and therefore could be a safe source of renewable energy.

关键词： organic waste Heavy Metal Concentration Briquettes Calorific Value Renewable Energy

Influence of Stand-Alone Vertical Gas Vents on Aeration and Denitrification of organic Municipal waste Assessed by Two-Dimensional (2D) Lysimeters

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Geoscience and Environment Protection 2023年第12期11卷 209-228页

作者： Tadis Dillon Takayuki Shimaoka Teppei Komiya Department of Urban and Environmental Engineering Faculty of Engineering Kyushu University Fukuoka Japan

Landfilled organic waste, in the presence of oxygen, can undergo aerobic decomposition facilitated by heterotrophic microorganisms. Aerobic degradation of solid waste can quickly consume available oxygen thus curtailing further degradation. The aim of this study was the investigation of a low-cost method of replenishing oxygen consumed in landfilled waste. Three 2D lysimeters were established to investigate the effectiveness of stand-alone, vertical ventilation pipes inserted into waste masses. Two different configurations of ventilation were tested with the third lysimeter acting as an unventilated control. Lysimeters were left uninsulated and observed over the course of 6 months with regular collection of gas and leachate samples. Lysimeters were then simulated for Oxygen (O2) and Nitrous oxide (N2O) to analyze the denitrification contributions of each. The experiment revealed that a single ventilation pipe can increase the mean oxygen level of a 1.7 m × 1.0 m area by up to 13.5%. It also identified that while increasing the density of ventilation pipes led to increased O2 levels, this increase was not significant at the 0.05 probability level. A single vent averaged 13.67% O2 while inclusion of an additional vent in the same area only increased the average to 14.59%, a 6.7% increase. Simulation helped to verify that lower ventilation pipe placement density may be more efficient as in addition to the effect on oxygenation, denitrification efficiency may increase. Simulations of N2O production estimated between 8% - 20% more N2O being generated with lower venting density configurations.

关键词： organic waste waste Stabilization Passive Aeration 2D Lysimeter COMSOL Multiphysics In-Situ Aeration

Road to full bioconversion of biowaste to biochemicals centering on chain elongation: A mini review

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2019年第12期31卷 50-64页

作者： Wenhao Han Pinjing He Liming Shao Fan Lü State Key Laboratory of Pollution Control and Resource Reuse Tongji UniversityShanghai 200092China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China Institute of waste Treatment and Reclamation Tongji UniversityShanghai 200092China Centre for the Technology Research and Training on Household waste in Small Toums&Rural Area Ministry of Housing and Urban-Rural Development of China(MOHURD)China

Production of biochemicals from waste streams has been attracting increasing worldwide interest to achieve climate protection *** elongation(CE)for production of mediumchain carboxylic acids(MCCAs,especially caproate,enanthate and caprylate)from diverse biowaste has emerged as a potential economic and environmental technology for a sustainable *** present mini review summarizes the research utilizing various synthetic or real waste-derived substrates available for MCCA ***,the microbial characteristics of the CE process are surveyed and *** that a large proportion of recalcitrantly biodegradable biowaste and residues cannot be further utilized by CE systems and remain to be treated and disposed,we propose here a loop concept of bioconversion of biowaste to MCCAs making full use of the biowaste with zero *** could make possible an alternative technology for synthesis of value-added products from a wide range of biowaste,or even non-biodegradable waste(such as,plastics and rubbers).Meanwhile,the remaining scientific questions,unsolved problems,application potential and possible developments for this technology are discussed.

关键词： organic waste waste valorization Chain elongation Medium-chain carboxylic acids Functional microbes Electron donors