Gasifying Kinetics Analysis on Mixing Municipal Solid Waste and Sludge

2013 ◽  
Vol 650 ◽  
pp. 629-633
Author(s):  
Song Tao Kong ◽  
Ping Cai ◽  
Li Jun Zhao ◽  
Jiang Tao Wei
Keyword(s):  
Sewage Treatment ◽  
Calorific Value ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Kinetics Parameters ◽  
Exponential Factor ◽  
Urban Sewage ◽  
Other Substances ◽  
Gasification Reaction ◽  
Design Construction

To gasify the mixture of sludge coming from urban sewage treatment residual and MSW is an ideal way to control the combustion of dioxins and other substances which pollute the atmosphere. Due to the complex composition of MSW and changing rapidly in the gasification parameters as much as possible, engineering require main ingredients and calorific value. The main ingredients of typical municipal sewage sludge and MSW are measured on thermobalance pyrolysis. The kinetics parameters of the gasification reaction are obtained, such as the activation energy and pre-exponential factor. These parameters synthesis mixture parameters provide the basis for hybrid gasification of the actual sludge and MSW reactor design, construction and operation.

scholarly journals The use of urban sewage sludge as a substrate in a microbial fuel cell

2018 ◽  
Vol 7 (2.23) ◽  
pp. 277 ◽  
Author(s):  
RR Rudenko ◽  
EE Vasilevich ◽  
GO Zhdanova ◽  
KI Chizhick ◽  
IA Topchiy ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Microbial Fuel Cells ◽  
Sewage Treatment ◽  
Electric Circuit ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Left Bank ◽  
Urban Sewage ◽  
Number Of Microorganisms ◽  
Urban Sewage Sludge

The possibility of using urban sewage sludge from the silt areas of the sewage treatment facilities of the left bank of Irkutsk as a substratum in microbial fuel cells (MFС) was studied. The characteristics of voltage and current intensity generated by the microbiological preparation "Doctor Robik 109" in MFC without taking into account and taking into account the resistance of the external electric circuit are obtained. It is shown that sewage sludge with the addition of peptone and acetate (without the introduction of microorganisms-bioagents) is also capable of generating electricity. Presumably, this is due to the presence in the sewage sludge of a large number of microorganisms and their spores. An increase in the total microbial number in the investigated wastewater sediments supports the above hypothesis. The carried out researches testify to the prospects of using MFC for municipal sewage sludge utilization.  

Dried Municiple Sewage Sludge Gasification Experiment in Dual Fluidized Bed

2011 ◽  
Vol 383-390 ◽  
pp. 3799-3804
Author(s):  
Xiao Xu Fan ◽  
Lei Zhe Chu ◽  
Li Guo Yang
Keyword(s):  
Fly Ash ◽  
Sewage Sludge ◽  
Fluidized Bed ◽  
Calorific Value ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Test Results ◽  
Leaching Toxicity ◽  
Dual Fluidized Bed ◽  
Hot Test

The fuel characteristics of municipal sewage sludge are suitable for dual fluidized bed(DFB) gasification, which can get middle calorific value gas through volatile pyrolysis, and reduce volume through char combustion. The hot test results of municipal sewage sludge on DFB rig were showen that the temperature distribution along combustor heigh is uniform, and the carbon content of fly ash is about 2~3%. In the experiment, with the increase of gasifier temperatrue, the more volatile of the sewage sludge was pyrolyzed. When the temperature of the gasifier reached 800°C, the calorific value of gas was 6.9MJ/Nm3; the emissions of SO2, NOx and HCl were appropriate to the standard. The leaching toxicity of heavy metal of the fly ash was lower than the discharge standard.

Assessment of Environmental Quality of Soil Fertilized Grapefruit Trees with Municipal Sewage Sludge

2013 ◽  
Vol 671-674 ◽  
pp. 2736-2741
Author(s):  
Yin An Ming ◽  
Tao Tao
Keyword(s):  
Sewage Sludge ◽  
Environmental Quality ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Land Application ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Limiting Factor

To reuse municipal sewage sludge safely, experiment was carried out on grapefruit trees fertilized with composted sludge from Shiweitou Sewage Treatment Plant in Xiamen City of China, and a method was introduced of how to assess the environmental quality of grapefruit trees soil fertilized with sludge by Set Pair Analysis (SPA) model. The results showed that the soil in the surface layer (0-15cm) and the deeper layer (15-30cm) was less clean, and the environment of soil was not polluted. Thus it was feasible to use sludge as fruit fertilizer. The maximum service life of sludge for continuous land application was estimated by taking Cd as the limiting factor, which would provide scientific guide and technical support for safe land application of sludge.

scholarly journals Elementary analysis and energetic potential of the municipal sewage sludges from the Gdańsk and Kościerzyna WWTPs

2018 ◽  
Vol 26 ◽  
pp. 00004
Author(s):  
Arkadiusz Ostojski
Keyword(s):  
Sewage Sludge ◽  
Water Content ◽  
Calorific Value ◽  
High Water ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
High Water Content ◽  
Sewage Sludges ◽  
Heating Value ◽  
Elementary Analysis

This paper aims to present municipal sewage sludge (MSS) elementary analysis and energetic potential based on measurement of heat of combustion (higher heating value HHV) and calculation of calorific values (lower heating value LHV). The analysis takes into the consideration water content in sewage sludge, at different utilization stages, in wastewater treatment plants in Gdańsk Wschód and Kościerzyna – Pomeranian Voivodeship. The study yielded the following results (in % dry matter): ash 19÷31 %, C - 31÷36 %, H - 5÷6 %, N - 4÷6 %, O - 28÷32 %, S – 1 %. Calorific value of stabilized sludges in Gdańsk was on average 13.8÷15 MJ/kg. In case of sludges not undergoing digestion from Kościerzyna WWTP, the calorific value was at the level of 17.5 MJ/kg. Thus, sewage sludges are good energy carriers. High water content though is the problem, as it lowers the useful effect of heat. There is no alternative for thermal sewage sludge neutralization, which is in conformity with valid Polish National Waste Management Plan (KPGO 2022).

Treatment and Disposal of Municipal Sewage Sludge and it’s Resources Utilization as Construction Material

2011 ◽  
Vol 194-196 ◽  
pp. 2061-2064 ◽  
Author(s):  
Deng Ling Jiang ◽  
Guo Wei Ni
Keyword(s):  
Construction Material ◽  
Sewage Treatment ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Sludge Reduction ◽  
Reclaimed Land ◽  
Sludge Stabilization ◽  
Treatment And Disposal ◽  
By Products ◽  
Land Filling

During the process of sewage treatment, some by-products are generated and among them, the sludge stands out, because of the largest volume and mass generated, and for containing heavy metals in its composition. Sludge is generally disposed of through land filling and spreading on reclaimed land. It has resulted in seriously contamination. It is necessary to improve the method of the disposal of sludge. Balanced with the environmental and economic benefit, the disposal of sludge, the economy and the environment can be optimized so as to realize the sludge stabilization, sludge reduction and sludge reutilization.

scholarly journals Possible Applications of Hardening Slurries with Fly Ash from Thermal Treatment of Municipal Sewage Sludge in Environmental Protection Structures

2016 ◽  
Vol 63 (1) ◽  
pp. 47-61 ◽  
Author(s):  
Paweł Falacinski ◽  
Łukasz Szarek
Keyword(s):  
Fly Ash ◽  
Sewage Sludge ◽  
Thermal Treatment ◽  
Sewage Treatment ◽  
Combustion Products ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Water Separation ◽  
Coal Combustion Products ◽  
Environmentally Safe

Abstract In Poland, in recent years, there has been a rapid accumulation of sewage sludge - a by-product in the treatment of urban wastewater. This has come about as a result of infrastructure renewal, specifically, the construction of modern sewage treatment plants. The more stringent regulations and strategic goals adopted for modern sewage management have necessitated the application of modern engineering methodology for the disposal of sewage sludge. One approach is incineration. As a consequence, the amount of fly ash resulting from the thermal treatment of municipal sewage sludge has grown significantly. Hence, intensive work is in progress for environmentally safe management of this type of waste. The aim of the experiment was to evaluate the possibility of using the fly ash that results from municipal sewage sludge thermal treatment (SSTT) as an additive to hardening slurries. This type of hardening slurry with various types of additives, e.g. coal combustion products, is used in the construction of cut-off walls in hydraulic structures. The article presents the technological and functional parameters of hardening slurries with an addition of fly ash obtained by SSTT. Moreover, the usefulness of these slurries is analysed on the basis of their basic properties, i.e. density, contractual viscosity, water separation, structural strength, volumetric density, hydraulic conductivity, compressive and tensile strength. The mandated requirements for slurries employed in the construction of cut-off walls in flood embankments are listed as a usefulness criteria. The article presents the potential uses of fly ash from SSTT in hardening slurry technology. It also suggests directions for further research to fully identify other potential uses of this by-product in this field.

scholarly journals Ecotoxicity Assessment of Stabilized Sewage Sludge from Municipal Sewage Treatment Plant

2016 ◽  
Vol 22 (3) ◽  
pp. 157-166 ◽  
Author(s):  
Elżbieta Włodarczyk ◽  
Marta Próba ◽  
Lidia Wolny
Keyword(s):  
Sewage Sludge ◽  
Sewage Treatment ◽  
Daphnia Pulex ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Water Extract ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Test Results ◽  
Municipal Sewage Treatment Plant

Abstract Aim of this study was to evaluate the ecotoxicity of municipal sewage sludge conditioned with polyelectrolytes, taken from selected sewage treatment plant. Using the bioindication analysis overall toxicity was assessed, which allows to know the total toxicity of all the harmful substances contained in sewage sludge, in many cases acting synergistically. To prepare a sample of sludge for the basic test, all analyses were performed with a ratio of liquid to solid of 10:1 (water extract). Daphnia pulex biological screening test was used. A dilution series of an water extract of sludge were prepared to include within its scope the lowest concentration that causes 100% effect and the highest producing less than 10% of the effect within a specified range of the assay. The results of the test were read after 24 and 48 hours. Based on the research and analysis of test results it proved that the sewage sludge conditioned with polyelectrolytes exhibit the characteristics of eco-toxic.

scholarly journals Ecological and Economic Aspects of the Application of Sewage Sludge in Energetic Plant Plantations - A Swot Analysis

2017 ◽  
Vol 27 (4) ◽  
pp. 157-168 ◽  
Author(s):  
Marta Wójcik ◽  
Feliks Stachowicz ◽  
Adam Masłoń
Keyword(s):  
Sewage Sludge ◽  
Waste Management ◽  
Swot Analysis ◽  
Management Strategies ◽  
Calorific Value ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Mineral Fertilizers ◽  
Thermal Methods ◽  
Perennial Plant

Abstract Sewage sludge management in Poland is a relatively new field of waste management called “in statu nascendi”, the standards of which have not been recognized yet. It also requires the implementation of new solutions in the field of sewage sludge. So far, the most popular method of sewage sludge utilization has been landfill disposal. In line with the restriction placed on landfill waste with a calorific value above 6 MJ/kg introduced on 1 January 2016, agricultural use and thermal methods are particularly applied. Municipal sewage sludge may be successfully used in the cultivation of energetic plant plantations. The aforementioned waste could be treated as an alternative to traditional mineral fertilizers, which in turn might successfully provide valuable nutrients for plants. This paper illustrates the SWOT analysis (Strengths, Weaknesses, Opportunities, and Threats) associated with the use of sewage sludge from Świlcza-Kamyszyn WTTP (Podkarpackie Province, Poland) for agricultural purposes. This analysis could be useful in evaluating the utility of sewage sludge in perennial plant plantations in order to determine the appropriate waste management strategies.

scholarly journals Application Status of Co-Processing Municipal Sewage Sludge in Cement Kilns in China

2019 ◽  
Vol 11 (12) ◽  
pp. 3315 ◽  
Author(s):  
Jingcheng Xu ◽  
Li Ping ◽  
Haihua Cao ◽  
Wei Liu ◽  
Yunhui Gu ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Sewage Treatment ◽  
Pollutant Emissions ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Cement Kiln ◽  
Continuous Growth ◽  
Construction Methods ◽  
Sludge Disposal ◽  
Cement Kilns

Municipal sewage sludge (MSS) disposal is an urgent issue in China with the continuous growth of sewage treatment capacity. Among various disposal methods, co-processing of MSS in cement kilns has been one of the most promising disposal methods in recent years. The present situation of sewage treatment and sludge disposal, the development of co-processing MSS in a cement kiln, and main disposal routes in China were discussed in this study. The results indicated that China had paid considerable attention to the technology and released correlative policies in the past few years. There were about 35 co-processing projects built in China, all of which were limited by construction scale and pollutant emissions. Due to differences in construction methods and economic conditions, China’s co-processing projects mainly employed three routes—direct addition to a transition chamber, addition to a precalciner after direct thermal drying, and addition to a precalciner after indirect drying. Summarizing and analyzing the characteristics of MSS co-processing would facilitate its development in China and similar regions.

Metamorphization of Bottom Sediments under Uncontrolled Discharge of Waste Waters into the Litoral Zone of the Herakleisky Peninsula (Crimea)

2021 ◽  
Author(s):  
N. A. Orekhova ◽  
◽  
E. I. Ovsyany ◽  
Keyword(s):  
Organic Carbon ◽  
Bottom Sediments ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
The Black Sea ◽  
Carbonate Content ◽  
Total Species Richness

Based on the data of field research performed in 2015, the authors studied characteristics of bottom sediments in the area of a deepwater sewage collector of “Yuzhnye” Integrated Sewage Treatment Plant and transformation of bottom sediments resulted from a longterm anthropogenic impact. The data were obtained by standard methods of geochemical analysis. It is established that the bottom sediments in the wastewater discharge area of “Yuzhnye” Integrated Sewage Treatment Plant are represented by rudaceous and coarsegrained fractions. These are mineral particles formed both as a result of coastal abrasion and in the process of accumulation and diagenesis (shell rock, detrital sand) of bottom sediments. In terms of their size distribution and chemical composition they differed significantly from the sediments formed under natural conditions. These were mostly unconsolidated water-saturated sediments with low carbonate content, high organic carbon and moisture content and signs (impurities, consistency, odour) characteristic of municipal sewage sludge. It is noted that the accumulation level of anthropogenic organic carbon is comparable to that of organic matter in the bottom sediments of Sevastopol region bays characterized by limited water exchange and subject to long-term anthropogenic pollution. Exceeding the previously established critical organic carbon levels in the soft soils of the Black Sea (Corg ≥ 2.5 %) results in destructive changes in ecosystems: it has a negative impact on benthos sharply changing its structural characteristics (abundance, biomass, total species richness) with restructuring of its dominant species structure.

Sign in / Sign up

Export Citation Format

Share Document