Assessment of the Efficiency and Safety of the Process for Utilization of Formaldehyde-Containing Solid Waste by the Method of Medium Temperature Dry Pyrolysis

2021 ◽  
Vol 25 (5) ◽  
pp. 46-51
Author(s):  
A.N. Rasstegaev ◽  
A.M. Gonopolsky ◽  
K.V. Tarantsev ◽  
K.R. Tarantseva ◽  
V.V. Golubovsky
Keyword(s):  
Solid Waste ◽  
Wood Chip ◽  
Environmental Safety ◽  
Solid Wastes ◽  
Medium Temperature ◽  
Working Zone ◽  
Luminescent Bacteria ◽  
Ash Residue ◽  
Pyrolysis Gases ◽  
Test Objects

An assessment of the efficiency and safety of the formaldehyde decontamination process containing solid waste of wood-chip boards by method of medium-temperature dry pyrolysis at the installation developed by the authors was evaluated. Sawdust of chip boards and coke ash residue after their pyrolysis were subjected to biological examination. The test objects were Daphnia magna Straus, algae Scenedesmus quadricauda and luminescent bacteria. It was revealed that pyrolysis of these wastes at the proposed plant will reduce the load on the hydrosphere and reduce the ratio of dilution of water extracts by more than half. Analysis of the composition of pyrolysis gases showed that the mass concentration of nitrogen oxides and carbon in the air of the working zone does not exceed the MPC of the working zone and MPC of settlements. The conclusion on environmental safety of the process of pyrolysis of formaldehyde-containing solid wastes at the proposed installation is made.

Process and Unit for Recycling of Formaldehyde-Containing Solid Wastes by Pyrolysis

2021 ◽  
Vol 25 (1) ◽  
pp. 4-8
Author(s):  
A.N. Rasstegaev ◽  
A.M. Gonopolsky ◽  
K.V. Tarantsev ◽  
V.V. Golubovsky ◽  
K.R. Tarantseva
Keyword(s):  
Wood Chip ◽  
Point Of View ◽  
Gas Purification ◽  
Resource Saving ◽  
Pyrolysis Gas ◽  
Medium Temperature ◽  
Heating Chamber ◽  
Working Zone ◽  
Purification System ◽  
Technical Solutions

The unit for recycling formaldehyde containing solid waste by the method of medium-temperature dry pyrolysis with multistage pyrolysis gas purification system was proposed. Purification is carried out first in a catalyst cartridge, then in a dry cyclone, then in a scrubber, and at the final stage in a cold plasma unit. There original designs of chamber of thermal decomposition of wastes with variable, depending on loading, volume and with pre-heating chamber were proposed. On the example of recycling of waste of wood-chip boards, it is shown that the degree of waste processing in it is 98.1%, while the mass concentration of harmful substances in the air of the working zone does not exceed the MPC of the working zone and MPC of settlements. It was established that the proposed technical solutions not only make the process safer, but also improve it from the point of view of energy and resource saving.

CLEAN UTILIZATION OF MUNICIPAL SOLID WASTES AND ALTERNATIVE FUELS DERIVED FROM IT

2020 ◽  
Vol 5 (4) ◽  
pp. 202-209
Author(s):  
Alexander Topal ◽  
◽  
Iryna Holenko ◽  
Luidmyla Haponych ◽  
◽  
...  
Keyword(s):  
Thermal Treatment ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Alternative Fuels ◽  
Solid Wastes ◽  
Municipal Solid Wastes ◽  
Local Conditions ◽  
Ecological Requirements ◽  
Clean Technologies

For the municipal solid waste (MSW) to be used in a proper way, it is necessary to implement clean technologies capable of thermal treatment of MSW and RDF in order to produce heat and electricity while meeting current ecological requirements. Nowadays, a number of technologies for MSW/RDF thermal treating are being used worldwide. Among them, the most proven technologies, applicable for industrial introduction, have been considered while analyzing their advantages/ disadvantages accounting for local conditions of Ukraine.

Resistance of Binding Systems of Various Compositions to the Action of Molds

2020 ◽  
Vol 786 (11) ◽  
pp. 41-46
Author(s):  
V.V. STROKOVA ◽  
◽  
V.V. NELUBOVA ◽  
M.N. SIVALNEVA ◽  
M.D. RYKUNOVA ◽  
...  
Keyword(s):  
Aging Process ◽  
Building Materials ◽  
Environmental Safety ◽  
Fungal Resistance ◽  
Building Structures ◽  
Vital Activity ◽  
Regulatory Documents ◽  
Living Organisms ◽  
Biological Corrosion ◽  
Test Objects

The dynamic development of urbanization contributes to an increase in emissions of industrial waste, which is the cause dysfunction of the ecosystem balance and leads to the development of biological corrosion on building materials associated with the products of the vital activity of microorganisms. In this regard, it is necessary to assess the resistance of composites to predict the durability of building structures under conditions of biological influence of microorganisms. Binder systems of various compositions were studied: cementless nanostructured binders (NB) based on quartz sand and granodiorite, gypsum, Portland cement and alumina cement. The toxicity of binders was assessed by biotesting on living organisms – cladocerans Daphnia Magna – according to the criteria of the intensity of their growth and viability. As a result, the high environmental safety of NB is substantiated, and the ranking of the studied binders according to the degree of increase in their toxicity to test objects is presented. Fungal resistance was assessed by the ability of molds for growing and reproduction on the studied samples. It was found that the most active in terms of the development of binders were representatives of the genus Aspergillus, the intensity of growing of which in all variants did not decrease below 3 points. Gypsum and NB were especially vulnerable, where the degree of fouling repeatedly reached 5 points. Even the initially biostable cement, after the aging process, lost its stability at different extent. The obtained results indicate the need to increase the resistance of composites for various purposes under conditions of biocorrosion at the stage of design and updating of regulatory documents, including tests for fungal resistance in the list of mandatory.

scholarly journals Municipal Solid Waste Characterization and Landfill Gas Generation in Kakia Landfill, Makkah

2021 ◽  
Vol 13 (3) ◽  
pp. 1462
Author(s):  
Faisal A. Osra ◽  
Huseyin Kurtulus Ozcan ◽  
Jaber S. Alzahrani ◽  
Mohammad S. Alsoufi
Keyword(s):  
Solid Waste ◽  
Energy Recovery ◽  
Solid Waste Management ◽  
Landfill Gas ◽  
Drainage System ◽  
Solid Wastes ◽  
Generation Model ◽  
Gas Generation ◽  
Municipal Solid Wastes ◽  
Makkah City

In many countries, open dumping is considered the simplest, cheapest, and most cost-effective way of managing solid wastes. Thus, in underdeveloped economies, Municipal Solid Wastes (MSW) are openly dumped. Improper waste disposal causes air, water, and soil pollution, impairing soil permeability and blockage of the drainage system. Solid Waste Management (SWM) can be enhanced by operating a well-engineered site with the capacity to reduce, reuse, and recover MSW. Makkah city is one of the holiest cities in the world. It harbors a dozen of holy places. Millions of people across the globe visit the place every year to perform Hajj, Umrah, and tourism. In the present study, MSW characterization and energy recovery from MSW of Makkah was determined. The average composition of solid waste in Makkah city is organic matter (48%), plastics (25%), paper and cardboard (20%), metals (4%), glass (2%), textiles (1%), and wood (1%). In order to evaluate energy recovery potential from solid waste in Kakia open dumpsite landfill, the Gas Generation Model (LandGEM) was used. According to LandGEM results, landfill gas (methane and carbon dioxide) generation potential and capacity were determined. Kakia open dump has a methane potential of 83.52 m3 per ton of waste.

scholarly journals DETERMINATION OF PROPERTIES AND ELEMENTAL COMPOSITION OF MUNICIPAL SOLID WASTE IN ORDER TO PROPOSAL OF WASTE-TO-ENERGY PROJECT IN BINH DUONG PROVINCE

2018 ◽  
Vol 54 (2A) ◽  
pp. 56
Author(s):  
Phung Chi Vy
Keyword(s):  
Solid Waste ◽  
Elemental Composition ◽  
Calorific Value ◽  
Dry Weight ◽  
Solid Wastes ◽  
Waste To Energy ◽  
Composition Analysis ◽  
Energy Plant ◽  
Inorganic Components

Domestic solid wastes are classified into 10 samples of 04 groups with different sizes: 2 samples with sizes under and over 120 mm (M1-1, M1-2); 2 samples with sizes under and over 80 mm (M2-1, M2-2); 2 samples with sizes under and over 40 mm (M3-1, M3-2); 4 samples with sizes under 40 mm, 40 to 80 mm, 80 to 120 mm and over 120 mm (M4-1, M4-2, M4-3, M4-4). Results of sorting 10 solid waste samples into food, cloth, wood, plastic, paper, rubber/leather, metal, glass, other organic and inorganic components shown that recycled combustible, non-recycled combustible portions are ranged from 15,46 to 93,90 %, from 5,34 to 80,17 %, respectively. The density of 10 compressed garbage samples is ranged from 525,9 to 2016,7 kg/m3; moisture contents are ranged from 18.03 to 20.92 %. Ash content is ranged from 1.12 to 9.49 % dry weight; Calorific value is ranged from 3164,9 to 5757,0 kcal/kg of garbage. The volume of leached water from 10 kg wet garbage pressed by 250 kg load in 2 days is 300 ml (equivalent to 327,1 g). Results of elemental composition analysis shown that the contents of C, H, N, Cl, S are ranged from 35,00 to 51,96, from 6,01 to 6,23, from 0,41 to 0,88, from 0,44 to 0,56, from 0,14 to 0,84 %, respectively. On this basis, the author have proposed a waste-to-energy plant with capacity of 250 tons of waste/day to generate the electricity with capacity of 17,0 MW/day.

Waste and Discharge Sand Use of Foundry for the Manufacture of Concrete Tiles

2018 ◽  
Vol 759 ◽  
pp. 3-8
Author(s):  
A.V. dos Santos ◽  
Mauro C. Marchetti ◽  
Ayane R. de Souza ◽  
Deoclécio Junior Cardoso Silva ◽  
Leoni Pentiado Godoy ◽  
...  
Keyword(s):  
Solid Waste ◽  
New Technologies ◽  
Environmental Concern ◽  
Industrial Sector ◽  
Solid Wastes ◽  
Concrete Slabs ◽  
Waste Generation ◽  
Natural Sand ◽  
Solid Waste Generation ◽  
Casting Sand

The progress in the world industrial sector, together with new technologies increases solid waste generation and the consequent concern with the correct management of them. One of the biggest problems in the foundry sector is the generation of solid waste, consisting mainly of waste sands or discarded sand castings (ADF). Proper waste disposal is a challenge for industries, which are increasingly concerned about the need to preserve the environment and seeking for sustainable development. In Brazil, fused production in 2008 exceeded three million tons, generating approximately one ton of waste for each ton of metal produced. The main destination of this waste is industrial disposal landfills, which have high cost and is an increasing environmental concern for companies. Therefore, the aim of this research was to solve this problem, that is, it was proposed a methodology to reuse these solid wastes, testing our methodology by using concrete slabs with incorporation of foundry sand in different concentrations, in an increasing order of 5%, where natural sand was replaced by founding sand. The viability for the use of casting sand in relation to the resistance was significant in the traces 30% and 35%.

Introduction to Solid Waste and Its Management

2015 ◽  
pp. 1-23 ◽  
Author(s):  
Hamidi Abdul Aziz ◽  
Salem S. Abu Amr
Keyword(s):  
Developing Countries ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Urban Population ◽  
Solid Wastes ◽  
Economic Prosperity ◽  
Proper Management ◽  
The World ◽  
Msw Composition

Municipal Solid Waste (MSW) disposal has become an increasingly serious problem in many parts of the world. In general, greater economic prosperity and a higher percentage of urban population correspond to a greater amount of solid waste produced. However, less effort has been exerted in the proper management of solid wastes produced by urban dwellers, particularly in developing countries. This chapter introduces the basic MSW rules. MSW composition, production, and collection are also highlighted. Furthermore, the concept of landfilling and waste decomposition is discussed in this chapter.

scholarly journals Mismanagement of Solid Waste & its Impact on the Environment of Peshawar City

2012 ◽  
Vol 2 (4) ◽  
pp. 182
Author(s):  
Obaid-ur- Rehman ◽  
Syed Jamil Hassan Kazmi ◽  
Anwar Alam
Keyword(s):  
Local Government ◽  
Solid Waste ◽  
Demographic Data ◽  
Solid Wastes ◽  
Phase Iii ◽  
Sample Surveys ◽  
Interview Schedule ◽  
Afghan Refugees ◽  
Demographic Yearbook ◽  
Proper Disposal

The purpose of the study is to investigate reasons, types and workable for the disposal of wastes in Peshawar city with special emphasis on Municipal Corporation, Peshawar Development Authority (PDA) and local govt. The focus of the study is to ensure proper management of solid waste and cleanliness of the targeted areas. The data was collected through pre-designed questionnaire and interview schedule. The major sources of demographic data are census, sample surveys, demographic yearbook, statistical handbook, national and international publications. (Alam: 2006). Board, Karkhano and Hayat Abad Phase III were the targeted area of the study. A sample of size 300 was selected out of 37,839 population in three target areas i.e. Board 96 out of 12,164, Hayat Abad Phase III 121 out of 15,281, and Karkhano 83 out of 10,394 through proportion allocation method of sampling.The results of the study indicated that Local government has no proper planning, for the disposal of solid waste. The  residents  have no awareness for the proper disposal of the solid wastes.  Population is directly proportion to the increase in solid wastes mismanagement, more over Afghan Refugees has accelerated the solid waste mismanagement in the area. 

scholarly journals Analyses for Synthesis Gas from Municipal Solid Waste Gasification under Medium Temperatures

Processes ◽  
2020 ◽  
Vol 8 (1) ◽  
pp. 84 ◽  
Author(s):  
Qinyang Gu ◽  
Wei Wu ◽  
Baosheng Jin ◽  
Zheng Zhou
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Oxygen Content ◽  
Tubular Reactor ◽  
Oxidation Reactions ◽  
Medium Temperature ◽  
Combustible Gas ◽  
Lower Heating Value ◽  
Waste Gasification ◽  
Increasing Temperature

Municipal solid waste (MSW) gasification could be a novel method that shows the various advantages over traditional MSW treatments in China. Other research concluded that MSW gasification was operating by the assistant heat, and the gasification may occur under medium temperature. So, this study is aimed to investigate MSW gasification and pyrolysis behavior and analyze the syngas evolution and reaction mechanism. The MSW samples were collected in daily life and the experiments were carried out in a fixed tubular reactor below 650 °C. The effects of medium temperature and oxygen content on syngas quality were elucidated in depth. The results have shown that temperature can promote the syngas quality in the range of 550–650 °C, because the increasing temperature strengthens the reaction rate. The oxygen content should be controlled in a certain range, or oxidation reactions will be more prominent during gasification. The optimal gasification condition in this study was obtained at 650 °C and an oxygen concentration of 1.25%, the combustible gas yield and the lower heating value (LHV) of syngas of this condition were 0.296 L/g and 10.98 kJ/L, respectively. This study provides insights for MSW gasification under medium temperature, and a practical gasification system can be designed under a certain condition.

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