Phosphorous Recovery as Struvite from Anaerobically Digested Sewage Sludge Liquors in Delhi, India

2017 ◽  
pp. 247-253
Author(s):  
Swati Gupta ◽  
Arun Kansal ◽  
Shivakshi Jasrotia
Keyword(s):  
Sewage Sludge ◽  
Digested Sewage Sludge

The nitrogen value of anaerobically digested sewage sludge applied to grassland during winter

1995 ◽  
Vol 50 (4) ◽  
pp. 353-364 ◽  
Author(s):  
K. F. EDGAR ◽  
D. A. KLESSA ◽  
J. FRAME ◽  
R. D. HARKESS
Keyword(s):  
Sewage Sludge ◽  
Digested Sewage Sludge

Evaluation of Pellets Produced from Dried, Anaerobically Digested, Sewage Sludge

1990 ◽  
Vol 6 (5) ◽  
pp. 597-600
Author(s):  
D. B. Anholt ◽  
R. J. Ford ◽  
J. A. Gillies ◽  
R. L. Kushwaha
Keyword(s):  
Sewage Sludge ◽  
Digested Sewage Sludge

Extreme-thermophilic biohydrogen production by an anaerobic heat treated digested sewage sludge culture

2011 ◽  
Vol 36 (14) ◽  
pp. 8727-8734 ◽  
Author(s):  
Rafiani Hasyim ◽  
Tsuyoshi Imai ◽  
Alissara Reungsang ◽  
Sompong O-Thong
Keyword(s):  
Sewage Sludge ◽  
Biohydrogen Production ◽  
Heat Treated ◽  
Digested Sewage Sludge

scholarly journals Comparative assessment of microbial enzyme activity with compost and sewage sludge amendment

2015 ◽  
Vol 7 (2) ◽  
pp. 1021-1028
Author(s):  
Jatinder Kaur ◽  
Sandeep Sharma ◽  
Hargopal Singh
Keyword(s):  
Enzyme Activity ◽  
Sewage Sludge ◽  
Organic Carbon ◽  
Soil Microbial Activity ◽  
Available Phosphorus ◽  
Microbial Activities ◽  
Soil Microbial ◽  
Microbial Enzyme ◽  
Positive Effect ◽  
Digested Sewage Sludge

Changes in soil microbial activities were investigated to examine the effect of aerobically digested sewage sludge (SS) and compared with compost under incubation conditions over 63 days. Sandy soil was amended with 0.25, 0.5, 1.0 and 1.5 % w/w of compost and sewage sludge. Enzyme activity (dehydrogenase, alkaline phosphatase, acid phosphatase, phytase and urease) were examined at an interval of 3, 7, 14, 21, 28, 42 and 63 days. At the end of the experiment the change in organic carbon, nitrogen, potassium and phosphorus was also recorded.Results indicated that enzyme activities were substantially enhanced in presence of both amendments for first few days and the higher increases were measured at 1.5% of compost and sewage sludge amendment. Then an overall decrease in enzyme activity was recorded. Both the amendments also significantly increased the organic carbon, nitrogen and potassium of the soil while increase in available phosphorus was only recorded in treatment receiving compost. The present experiment indicated that addition of compost and sewage sludge have positive effect on soil microbial activity and can be safely used as soil amendment without having any adverse effect. Though, a previous examination of sewage sludge to be used must be made for heavy metals and pathogens.

scholarly journals Agricultural Soils Amended With Thermally-Dried Anaerobically-Digested Sewage Sludge Showed Increased Risk of Antibiotic Resistance Dissemination

2021 ◽  
Vol 12 ◽  
Author(s):  
Leire Jauregi ◽  
Lur Epelde ◽  
Itziar Alkorta ◽  
Carlos Garbisu
Keyword(s):  
Antibiotic Resistance ◽  
Sewage Sludge ◽  
Relative Abundance ◽  
Agricultural Soils ◽  
Antibiotic Resistance Genes ◽  
Exchange Capacity ◽  
Amended Soils ◽  
Α Diversity ◽  
Increased Risk ◽  
Digested Sewage Sludge

The application of sewage sludge (SS) to agricultural soil can help meet crop nutrient requirements and enhance soil properties, while reusing an organic by-product. However, SS can be a source of antibiotic resistance genes (ARGs) and mobile genetic elements (MGEs), resulting in an increased risk of antibiotic resistance dissemination. We studied the effect of the application of thermally-dried anaerobically-digested SS on (i) soil physicochemical and microbial properties, and (ii) the relative abundance of 85 ARGs and 10 MGE-genes in soil. Soil samples were taken from a variety of SS-amended agricultural fields differing in three factors: dose of application, dosage of application, and elapsed time after the last application. The relative abundance of both ARGs and MGE-genes was higher in SS-amended soils, compared to non-amended soils, particularly in those with a more recent SS application. Some physicochemical parameters (i.e., cation exchange capacity, copper concentration, phosphorus content) were positively correlated with the relative abundance of ARGs and MGE-genes. Sewage sludge application was the key factor to explain the distribution pattern of ARGs and MGE-genes. The 30 most abundant families within the soil prokaryotic community accounted for 66% of the total variation of ARG and MGE-gene relative abundances. Soil prokaryotic α-diversity was negatively correlated with the relative abundance of ARGs and MGE-genes. We concluded that agricultural soils amended with thermally-dried anaerobically-digested sewage sludge showed increased risk of antibiotic resistance dissemination.

scholarly journals The effect of temperature and digested sewage sludge cover over tailings on the leaching of contaminants from Ballangen tailings deposit

2021 ◽  
Author(s):  
Jinmei Lu ◽  
Tiina Leiviskä ◽  
Ingar Walder
Keyword(s):  
Climate Change ◽  
High Temperature ◽  
Sewage Sludge ◽  
Mine Drainage ◽  
Effect Of Temperature ◽  
Threshold Temperature ◽  
Low Salinity ◽  
Leaching Experiment ◽  
Change Context ◽  
Digested Sewage Sludge

Abstract Dry covers can be applied above tailings to reduce and prevent formation of acid mine drainage and leaching of contaminants. Efficiency of covers is affected by different parameters, of which temperature change under climate change context is one. Here, a laboratory column leaching experiment was performed under four temperatures, 5, 10, 14, and 18 °C on unoxidized tailings from Ballangen, Norway. 600 mL of water was added to each column every second week and leachate collected and analyzed for pH, salinity, alkalinity, concentrations of sulfate, Co, Fe, Mn, Ni, and Zn. A thin layer of digested sewage sludge was added to columns after the 16th leaching cycle. In total, 21 leaching cycles were performed. Results showed low oxidation of tailings and therefore high pH and low salinity, SO42−, Fe, Ni, and Co in the leachates at leaching temperature of 5 °C. Addition of sludge cover slowed down oxidation of underlying tailings and decreased leaching of SO42−, Fe, Mn, Co, Ni, and Zn from the tailings deposit, especially at relatively high temperature. 10 °C is a threshold temperature, below which leaching is not affected by the cover addition so much. At a leaching temperature higher than 10 °C, the sludge cover addition can reduce the leaching of elements significantly.

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