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).

scholarly journals An Experimental Study on Solidifying Municipal Sewage Sludge through Skeleton Building Using Cement and Coal Gangue

2017 ◽  
Vol 2017 ◽  
pp. 1-13 ◽  
Author(s):  
Jiankang Yang ◽  
Haijun Lu ◽  
Xiong Zhang ◽  
Jixiang Li ◽  
Weiwei Wang
Keyword(s):  
Shear Strength ◽  
Hydraulic Conductivity ◽  
Sewage Sludge ◽  
Nitrogen Adsorption ◽  
High Water ◽  
Coal Gangue ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
High Water Content ◽  
Landfill Liner

The municipal sewage sludge typically has very high water content and low shear strength. Conventional methods of lime and cement solidification of municipal sewage sludge often suffer high cost, significant drying shrinkage, frequent cracking, high hydraulic conductivity, and low strength. To overcome these shortcomings, in this paper a skeleton-building method was used to solidify municipal sewage sludge in which coal gangue, cement and clay, and fiber were used as skeleton materials, cementation materials, and filling materials, respectively. Comprehensive laboratory tests including cracking, nitrogen adsorption, triaxial shearing, and permeability tests were performed to determine cracking, pore structure, shear strength, and hydraulic conductivity of municipal sewage sludge solidified with different proportions of coal gangue, cement, fiber, and clay. Based upon the experimental results, the mechanisms of the skeleton building using cement and coal gangue were discussed and factors controlling the mechanical and hydraulic behavior of the solidified soils were analyzed at both microscopic and macroscopic levels. Based upon the test results and analyses, recommendations were made for solidifying municipal sewage sludge through skeleton building using cement and coal gangue. The solidified soils have high soil strength, high resistance to cracking, and low hydraulic conductivity which are sufficient for being used as landfill liner.

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.

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 Novel Conditioner For Efficient Dewaterability And Modification of Oily Sludge With High Water Content

2021 ◽  
Author(s):  
Biming Liu ◽  
Yue Teng ◽  
Wenbin Song ◽  
Haixia Wu
Keyword(s):  
Fly Ash ◽  
Water Content ◽  
Radical Reaction ◽  
Calorific Value ◽  
High Water ◽  
Economic Benefits ◽  
Hazardous Substances ◽  
High Water Content ◽  
Oily Sludge ◽  
Free Radical Reaction

Abstract The Oily sludge with high water content (OS) was dewatered, modified and converted into solid fuel by a novel chemical conditioner (OSO-101). The effect of OSO-101 dosage on the dewaterability of OS was studied, showing that OSO-101 dosage of 15% (wt.) could achieve the best dewaterability efficiency of OS (98.18%). Meanwhile, compared with some conventional conditioners, OSO-101 developed by our team was more effective in improving OS dewaterability efficiency. And OSO-101 may have free radical reaction, polar reaction and redox reaction with petroleum hydrocarbons in OS, thereby polymerizing and forming condensed solid structures. The calorific value change of OS after conditioning, heavy metal content and dioxins content of fly ash leached from incinerated product were measured for resource analysis and environmental assessment. Results showed that the resultant OS fuel blocks had extremely low content of heavy metals, dioxins and other toxic and hazardous substances leached from fly ash, thereby no secondary treatment and fully meeting environmental protection emission standards. Additionally, OSO-101 had certain economic rationality, and could effectively recover the calorific value contained in OS. This research is expected to provide new insights for efficient dewaterability and modification of OS, as well as subsequent resource utilization and harmless treatment, bringing potential environmental and economic benefits.

Comparative Analysis of the Measurement Methods of Bound Water Content in Municipal Sewage Sludge

2012 ◽  
Vol 518-523 ◽  
pp. 2991-2995
Author(s):  
Wei Jun Zhang ◽  
Ke Chun Sun
Keyword(s):  
Comparative Analysis ◽  
Sewage Sludge ◽  
Water Content ◽  
Bound Water ◽  
Measurement Methods ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Sludge Dewatering ◽  
Advantages And Disadvantages ◽  
Bound Water Content

The dewatering of municipal sewage sludge is a current problem due to the huge production of this waste. The bound water content in sludge is closely related to the sludge dewatering performance. By comparative analysis of the measurement methods of the bound water content in sludge, this article points out their respective advantages and disadvantages, as well as the respects which should be noted in practice.

scholarly journals KAJIAN KARAKTERISTIK BRIKET DARI PENCAMPURAN JERAMI DAN SEKAM PADI DARI LIMBAH PASCA PANEN DI LAHAN GAMBUT

2021 ◽  
Vol 9 (1) ◽  
pp. 23
Author(s):  
Fonny Rianawati ◽  
Zainal Abidin ◽  
Muhammad Naparin
Keyword(s):  
Moisture Content ◽  
Water Content ◽  
Rice Straw ◽  
High Water ◽  
Ash Content ◽  
National Standard ◽  
High Water Content ◽  
Rice Husks ◽  
Heating Value ◽  
Post Harvest

This study aims to study the characteristics of briquettes from rice straw and rice husks in the form of moisture content, density, ash content, flight substance content, and heating value with different mixing variations in an effort to overcome the occurrence of deep forest / land fires to control forest or land fires in wetland areas by innovating and utilizing technology of straw and rice husks from post-harvest waste.  The test results showed, the characteristic values are not much different for each mixing variation and are still below the Indonesian National Standard (SNI) No. 1-6235-2000, namely The heating value ranges from 2729.33 - 3492.14 cal/g (SNI ≥ 5000 cal/g), bonded carbon content ranges from 2.3524 -12.5870% (SNI ≥ 77%), ash content ranges from 27.3367 -29.8367% (SNI ≤ 8%) and the moisture content ranges from 18.2130 -28.8903% (SNI ≤ 8%). This is presumably due to the large content of the adhesive used, the pressing and drying processes that cause high water content, because high water content will cause a low calorific value. Low heating value will cause a large amount of ash content which causes a low value of bound carbon. However, overall charcoal briquettes from rice husks and rice straw can be applied to the community as a technological innovation that can be used in the use of post-harvest waste in an effort to control forest and land fires with land processing without burning.

A long-term chemical and infrared spectroscopy study on a soil amended with municipal sewage sludge

Agronomie ◽  
2001 ◽  
Vol 21 (2) ◽  
pp. 169-178 ◽  
Author(s):  
Giovanni Gigliotti ◽  
Pier Lodovico Giusquiani ◽  
Daniela Businelli
Keyword(s):  
Infrared Spectroscopy ◽  
Sewage Sludge ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Spectroscopy Study

Production of fuels on the basis of sewage sludge through conditioning using high calorific value fractions

2008 ◽  
Vol 3 (1) ◽  
Author(s):  
Karl-Georg Schmelz ◽  
Anja Reipa ◽  
Hartmut Meyer
Keyword(s):  
Sewage Sludge ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Calorific Value ◽  
Fluidised Bed ◽  
Sludge Treatment ◽  
Heating Value ◽  
Fine Coal ◽  
Used Cars ◽  
Plastic Components

Emschergenossenschaft and Lippeverband operate 59 wastewater treatment plants which produce approx. 100,000 Mg TS of sewage sludge each year. Using sludge pressure pipelines, about 60 % of this sludge are transported to the central sludge treatment plant in Bottrop. The digested sludges are conditioned using fine coal and polymers and are dewatered using membrane filters. By adding coal, the heating value of the sludge is raised which enables autothermal combustion of the dewatered sludges in fluidised bed furnaces at the central sludge treatment plant. In order to replace coal, a fossil fuel, as conditioning agent, experiments were conducted using alternative materials with high heating values. The addition of shredder fluff agglomerates proved to be particularly successful. Shredder fluff agglomerates are a residue from the recycling of used cars and are generated in a multistage process (e.g. Volkswagen-SiCon Process) by separating the light shredder fraction (plastic components etc.) from the total shredder fluff. The fibrous material is outstandingly suitable for improving the dewaterability and for sufficiently raising the heating value of the dewatered sludge in order to enable autothermal combustion. Since first experiments showed very positive results, a full-scale long-term test-run will take place in 2007.

Hydrogels as Antibacterial Biomaterials

2018 ◽  
Vol 24 (8) ◽  
pp. 843-854 ◽  
Author(s):  
Weiguo Xu ◽  
Shujun Dong ◽  
Yuping Han ◽  
Shuqiang Li ◽  
Yang Liu
Keyword(s):  
Mechanical Properties ◽  
Drug Delivery ◽  
Tissue Engineering ◽  
Water Content ◽  
Oxygen Permeability ◽  
Structural Diversity ◽  
High Water ◽  
Clinical Applications ◽  
High Water Content ◽  
Biomedical Field

Hydrogels, as a class of materials for tissue engineering and drug delivery, have high water content and solid-like mechanical properties. Currently, hydrogels with an antibacterial function are a research hotspot in biomedical field. Many advanced antibacterial hydrogels have been developed, each possessing unique qualities, namely high water swellability, high oxygen permeability, improved biocompatibility, ease of loading and releasing drugs and structural diversity. In this article, an overview is provided on the preparation and applications of various antibacterial hydrogels. Furthermore, the prospects in biomedical researches and clinical applications are predicted.

Sign in / Sign up

Export Citation Format

Share Document