scholarly journals Molecular characteristics of the refractory organic matter in the anaerobic and aerobic digestates of sewage sludge

RSC Advances ◽  
2018 ◽  
Vol 8 (58) ◽  
pp. 33138-33148 ◽  
Author(s):  
Xiaowei Li ◽  
Qingqing Mei ◽  
Xiaofang Yan ◽  
Bin Dong ◽  
Xiaohu Dai ◽  
...  
Keyword(s):  
Organic Matter ◽  
Sewage Sludge ◽  
Molecular Characteristics ◽  
Chemical Characteristics ◽  
Sludge Digestion ◽  
Refractory Organic Matter

The chemical characteristics of the refractory organic matter in anaerobic and aerobic digestates are hardly known although they are significant for further improving the degradation of organic matter during sludge digestion.

Changes in the chemical characteristics of water-extracted organic matter from vermicomposting of sewage sludge and cow dung

2012 ◽  
Vol 205-206 ◽  
pp. 24-31 ◽  
Author(s):  
Meiyan Xing ◽  
Xiaowei Li ◽  
Jian Yang ◽  
Zhidong Huang ◽  
Yongsen Lu
Keyword(s):  
Organic Matter ◽  
Sewage Sludge ◽  
Chemical Characteristics ◽  
Cow Dung

scholarly journals Recognition of the key chemical constituents of sewage sludge for biogas production

RSC Advances ◽  
2017 ◽  
Vol 7 (4) ◽  
pp. 2033-2037 ◽  
Author(s):  
Xiaohu Dai ◽  
Ying Xu ◽  
Yiqing Lu ◽  
Bin Dong
Keyword(s):  
Organic Matter ◽  
Sewage Sludge ◽  
Silica Particle ◽  
Biogas Production ◽  
Chemical Constituents ◽  
Anaerobic Sludge ◽  
Key Factors ◽  
Sludge Digestion ◽  
Anaerobic Sludge Digestion ◽  
Biodegradable Organic Matter

The easy biodegradable organic matter, non-biodegradable organic matter, metal ions, and micron-sized silica particle and their interactions were the key factors for limiting the biogas production from anaerobic sludge digestion.

scholarly journals Using biogas as an energy source

2021 ◽  
Vol 263 ◽  
pp. 04064
Author(s):  
Alexander Smirnov ◽  
Kantemir Tsabolov ◽  
Liliya Ineshina ◽  
Elena Gogina
Keyword(s):  
Organic Matter ◽  
Sewage Sludge ◽  
Resource Use ◽  
Organic Waste ◽  
Biogas Production ◽  
Gas Production ◽  
Waste Collection ◽  
Sludge Treatment ◽  
Sludge Digestion ◽  
The Russian Federation

This article discusses the topic of sewage sludge digestion. Anaerobic digestion of sewage sludge makes it possible to obtain biogas, which can later be used to generate heat or electricity. this approach to resource use is recognized worldwide as more environmentally friendly. The article discusses the experience of European countries in the production and use of biogas. In the Russian Federation, the situation is complicated by the fact that wastewater contains a small amount of organic matter, which is a product for biogas production. Therefore, methods have been proposed for increasing the content of organic matter in sediments, for example, by means of separate waste collection and disposal of organic waste through grinders into the sewerage system. Or, the amount of organic matter in the sewage sludge can be increased by adding manure from animal farms. The stages of sediment fermentation are considered. The topic of rationality and payback of the use of biogas is raised. Projects already working in different countries are being considered. Possible volumes of gas production and methods of air purification during sludge treatment are considered.

Sludge minimization by disintegration at different wastewater treatment plants

2008 ◽  
Vol 3 (1) ◽  
Author(s):  
Luchien Luning ◽  
Paul Roeleveld ◽  
Victor W.M. Claessen
Keyword(s):  
Organic Matter ◽  
Wastewater Treatment ◽  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
New Technologies ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Biological Degradation ◽  
Ongoing Research ◽  
Sludge Minimization

In recent years new technologies have been developed to improve the biological degradation of sewage sludge by anaerobic digestion. The paper describes the results of a demonstration of ultrasonic disintegration on the Dutch Wastewater Treatment Plant (WWTP) Land van Cuijk. The effect on the degradation of organic matter is presented, together with the effect on the dewatering characteristics. Recommendations are presented for establishing research conditions in which the effect of sludge disintegration can be determined in a more direct way that is less sensitive to changing conditions in the operation of the WWTP. These recommendations have been implemented in the ongoing research in the Netherlands supported by the National Institute for wastewater research (STOWA).

scholarly journals Optimal Solutions for the Use of Sewage Sludge on Agricultural Lands

Water ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 585
Author(s):  
Catalina Iticescu ◽  
Puiu-Lucian Georgescu ◽  
Maxim Arseni ◽  
Adrian Rosu ◽  
Mihaela Timofti ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Agricultural Production ◽  
Agricultural Land ◽  
Chemical Characteristics ◽  
Optimal Solutions ◽  
Physico Chemical ◽  
Agricultural Areas ◽  
The Impact ◽  
Made In

The use of sewage sludge in agriculture decreases the pressure on landfills. In Romania, massive investments have been made in wastewater treatment stations, which have resulted in the accumulation of important quantities of sewage sludge. The presence of these sewage sludges coincides with large areas of degraded agricultural land. The aim of the present article is to identify the best technological combinations meant to solve these problems simultaneously. Adapting the quality and parameters of the sludge to the specificity of the land solves the possible compatibility problems, thus reducing the impact on the environment. The physico-chemical characteristics of the fermented sludge were monitored and optimal solutions for their treatment were suggested so as to allow that the sludge could be used in agriculture according to the characteristics of the soils. The content of heavy metals in the sewage sludge was closely monitored because the use of sewage sludge as a fertilizer does not allow for any increases in the concentrations of these in soils. The article identifies those agricultural areas which are suitable for the use of sludge, as well as ways of correcting some parameters (e.g., pH), which allow the improvement of soil quality and obtained higher agricultural production.

scholarly journals Effect of Sewage Sludge Compost Usage on Corn and Faba Bean Growth, Carbon and Nitrogen Forms in Plants and Soil

Agronomy ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 628
Author(s):  
Hassan E. Abd Elsalam ◽  
Mohamed E. El- Sharnouby ◽  
Abdallah E. Mohamed ◽  
Bassem M. Raafat ◽  
Eman H. El-Gamal
Keyword(s):  
Organic Matter ◽  
Sewage Sludge ◽  
Plant Growth ◽  
Total Nitrogen ◽  
Faba Bean ◽  
Residual Effect ◽  
Growth Period ◽  
Nitrogen Forms ◽  
Amended Soils ◽  
Nitrogen Levels

Sewage sludge is an effective fertilizer in many soil types. When applied as an amendment, sludge introduces, in addition to organic matter, plant nutrients into the soil. When applied for cropland as a fertilizer, the mass loading of sewage sludge is customarily determined by inputs of N and/or P required to support optimal plant growth and a successful harvest. This study aims to examine the changes in organic matter contents and nitrogen forms in sludge-amended soils, as well as the growth of corn and faba bean plants. The main results indicated that there were higher responses to the corn and faba bean yields when sludge was added. Levels of organic carbon in soil were higher after maize harvest and decreased significantly after harvesting of beans, and were higher in sludge amended soils than unmodified soils, indicating the residual effect of sludge in soil. NO3−-N concentrations were generally higher in the soil after maize harvest than during the plant growth period, but this trend was not apparent in bean soil. The amounts of NH4+-N were close in the soil during the growth period or after the maize harvest, while they were higher in the soil after the bean harvest than they were during the growth period. Total nitrogen amounts were statistically higher in the soil during the growth period than those collected after the corn harvest, while they were approximately close in the bean soil. The total nitrogen amount in corn and bean leaves increased significantly in plants grown on modified sludge soil. There were no significant differences in the total nitrogen levels of the maize and beans planted on the treated soil.

Biolixiviation des métaux lourds et stabilisation des boues d'épuration : essai en bioréacteur opéré en mode cuvée

1993 ◽  
Vol 20 (1) ◽  
pp. 57-64 ◽  
Author(s):  
R. D. Tyagi ◽  
J. F. Blais ◽  
N. Meunier ◽  
D. Kluepfel
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Suspended Solids ◽  
Elemental Sulfur ◽  
Batch Reactor ◽  
Fecal Coliforms ◽  
Sludge Stabilization ◽  
Sludge Digestion ◽  
Batch Time ◽  
Phosphorus And Potassium

A biological process of heavy metals solubilization and sewage sludge stabilization was studied in a batch reactor of 30-L capacity. The acclimatized leaching microflora was composed of two major groups of thiobacilli: less acidophilic and acidophilic. A batch time of 10 days allows a substantial metal solubilization: cadmium (100%), copper (80%), manganese (80%), nickel (46%), and zinc (100%). The bioleaching process also causes a significative decrease in sludge total suspended solids (25%) and volatile suspended solids (32%), and a considerable reduction (under the detection limit of 10 cfu∙mL−1) of indicator bacteria (total coliforms, fecal coliforms, fecal streptococci). After filtration or centrifugation of the leached sludge, the solubilized metals were precipitated by lime neutralization. The phosphorus and potassium sludge contents were not affected by bioleaching process. These results indicate that the process of sludge digestion and metal leaching can be conducted in parallel in the same reactor. Key words: sewage sludge, heavy metals, bioleaching, stabilization, thiobacilli, elemental sulfur.

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