Potential Utilization of Sewage Sludge

1990 ◽  
Vol 22 (12) ◽  
pp. 277-285 ◽  
Author(s):  
M. A. Aziz ◽  
Lawrence C. C. Koe
Keyword(s):  
Sewage Sludge ◽  
Building Materials ◽  
Sewage Treatment ◽  
Road Construction ◽  
Total Production ◽  
Subgrade Soils ◽  
Sewer Systems ◽  
Alternative Means ◽  
Dewatered Sewage Sludge ◽  
City State

Singapore, a tropical-island city-state, is served by six modern sewage treatment plants with a combined design capacity of around 900,000 m3/day. Currently, 96.5 percent population of Singapore is served by sewer systems. Total production of raw sludge and digested dewatered sludge from six sewage treatment works in 1988 was about 2,546,000 m3 and 39,000 m3 respectively. Mast of the dewatered sewage sludge is used as a soil conditioner and landfilling. Since land is limited in Singapore, alternative means of disposal of dewatered sewage sludge are essential. Therefore, studies were conducted to investigate the feasibility of using dewatered sewage sludge for producing building materials and products like aggregates, bricks, paving blocks, tiles, drain sections and pipes. Studies were also conducted to use sewage sludge as a conditioning additive to improve the characteristics of poor subgrade soils for road construction. Attempts were also made to utilize sewage sludge as a filler material in concrete and bituminous mixes. Findings of these investigations have shown encouraging results. This paper presents the results of these studies on potential application of sewage sludge for beneficial uses.

scholarly journals EXPERIMENTAL SUBSTANTIATION OF THE HYGIENIC ASSESSMENT METHOD OF THE GEOTUBING OF DEPOSITS FROM URBAN SEWAGE TREATMENT FACILITIES

2019 ◽  
Vol 96 (7) ◽  
pp. 623-626 ◽  
Author(s):  
Khamzat K. Magomedov ◽  
K. B. Fridman ◽  
A. S. Belkin ◽  
S. N. Noskov
Keyword(s):  
Sewage Sludge ◽  
Sewage Treatment ◽  
Road Construction ◽  
Bound State ◽  
Environmental Safety ◽  
Assessment Method ◽  
Toxic Substances ◽  
Urban Sewage ◽  
Sludge Incineration ◽  
Translocation Mechanism

Every day in the city of St. Petersburg there is formed more than 10,000 m3 of sewage sludge. The main mass of deposits is stored at the landfill for storing waste with an area of up to 150 hectares. Toxic substances and pathogens contained in sediments can penetrate into the environment stipulating the significant pollution of the environment. In the arsenal of technologists dealing with the problem of sewage sludge disposal, there are numerous approaches and solutions, for instance: drying sludge, incineration, composting, vermicomposting, eco-concrete fixation. However, tried everything methodological approaches have not found their applications because of the impossibility of decrease in toxicity due to the presence of substances in the resulting substance of 1st and 2nd classes of danger, having a translocation mechanism of transition in plants. And, nevertheless, the problem of sewage sludge cannot be solved by used approaches because of the high toxicity caused by the presence of substances of the 1st and 2nd hazard classes in the obtained substance, for which the translocation mechanism of environmental contamination is characteristic. The aim of our work is the substantiation of the hygienic safety of the utilization of products obtained by geotube technology from deposits at the Northern Station for aeration «Vodokanal-SPb» in road construction. As the object of research there was selected the complex of sludge lagoons of the Northern Station for aeration «Vodokanal-SPb» located in the village of Novosilky. Sanitary-chemical, toxicological, parasitological, bacteriological, radiological. It is possible to observe the binding of ionic forms of ecotoxicants, transition of them to a bound state, which provides for the environmental safety. Helminthological and bacteriological studies show the epidemic safety of the product obtained by geotubing. Geotube technology seems to be the most promising in the treatment of accumulated sludge beds on sewage sludge.

scholarly journals Research in the field of using of ash from the incineration of sewage sludge, treated with mineral binders, for forest road construction

2020 ◽  
Vol 222 ◽  
pp. 01007
Author(s):  
Oksana Zubova ◽  
Vadim Siletskiy ◽  
Daniil Kulik ◽  
Taras Kovalenko ◽  
Mihail Naskovets
Keyword(s):  
Comparative Analysis ◽  
Sewage Sludge ◽  
Building Material ◽  
Building Materials ◽  
Road Construction ◽  
High Strength ◽  
Point Of View ◽  
Forest Road ◽  
Road Building ◽  
Forest Road Construction

The purpose of the study is to obtain a durable and cheap road-building material based on ash, reinforced with mineral astringent. Within the framework of the research, the optimal dosages of binders were searched for, the characteristics of the strength of mixture of ash with sludge and ash with cement were also determined. A comparative analysis of the economic efficiency between using a mixture of ash from the incineration of sewage sludge, reinforced with nepheline sludge, and traditional road building materials was carried out. The results of the study of mixtures of ash with mineral binders, such as nepheline sludge and cement, show that the obtained materials have high strength indicators and high indicators of the modulus of elasticity. They can be attributed to strength grades from M20 to M100. The developed building material (ash mixed with binders (nepheline sludge, cement)) could replace a similar building material in the technology of road construction, because if this mixture is taken in optimal dosages, it will be more profitable in the process of use, both from the point of physical and mechanical views, and point of view of economic indicators.

Operational Results of Melting System for Sewage Sludge

1991 ◽  
Vol 23 (10-12) ◽  
pp. 1773-1781 ◽  
Author(s):  
Daisaku Yashiki ◽  
Tadahiro Murakami
Keyword(s):  
Sewage Sludge ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Melting Furnace ◽  
Effective Utilization ◽  
History Of ◽  
Sludge Properties ◽  
Operation Results

Sludge melting furnaces have been applied recently to the treatment of a great deal of sludge generated from the sewage treatment plant. In this report, an explanation is provided of the history of system introduction, outline of treatment flow, sludge properties, operation results and effective utilization of slag generated at the reflector melting furnace, which began operation in July 1988 at the Futakami Sewage Treatment Plant in Toyama Prefecture. The melting furnace almost totally satisfies the needs of its design, and the properties of the generated melted slag exhibit the features that fully enable its effective utilization.

Sludge Treatment and Disposal Systems for Rural Areas in Germany

1993 ◽  
Vol 27 (9) ◽  
pp. 159-171 ◽  
Author(s):  
Eberhard Steinle
Keyword(s):  
Sewage Sludge ◽  
Rural Areas ◽  
Public Awareness ◽  
Sewage Treatment ◽  
Treatment Needs ◽  
Sludge Treatment ◽  
Sewage Treatment Plants ◽  
Sewage Purification ◽  
Treatment And Disposal ◽  
Nitrogen Phosphorus

First an overview of the systems currently in use and being discussed for sludge treatment is presented will) particular emphasis on distinguishing between the object of the system (conditioning objective of the various phases in the system) and a system concept (concept of various phases of the system in sequence to attain the disposal objective). More detailed information is given as to the salient systems as used with smaller sewage treatment plants in rural areas, such as digestion, dewatering, hygienization, composting and thermal drying. A further item of discussion is how sludge treatment influences the sewage treatment process. For the critical emissions (nitrogen, phosphorus) demanded in Germany, and thus for the degree of sewage treatment required, the load of the sewage treatment system resulting from sludge treatment needs to be taken into account. Accordingly, operation of sludge treatment and sewage purification must always be harmonized. The extent of these return loads also limits the spatial centralization of the system phases; this applies in particular to smaller sewage treatment plants in rural areas. In conclusion, an attempt is made to present a perspective for the agricultural utilization of such sludge in Germany. Since the critical values for emissions have been further tightened by new regulations, thus considerably elevating the associated sophistication of monitoring techniques, it is to be expected that the use of sewage sludge in agriculture will also be further reduced in rural areas, especially since public awareness of emission control has considerably reduced the acceptance of sewage sludge as fertilizer.

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.

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