Aerobic Stabilization in the Solid State of Partially Dewatered Sewage Sludge

1986 ◽  
pp. 407-413
Author(s):  
S. Coppola ◽  
F. Villani ◽  
F. Romano
Keyword(s):  
Solid State ◽  
Sewage Sludge ◽  
Aerobic Stabilization ◽  
Dewatered Sewage Sludge

Comparison of sewage sludge treatment systems for regions with hot climate

2007 ◽  
Vol 2 (1) ◽  
Author(s):  
Petia Mijaylova Nacheva ◽  
G. Moeller-Chávez ◽  
E. Ramírez-Camperos ◽  
L. Cardoso-Vigueros
Keyword(s):  
Sewage Sludge ◽  
Alkaline Treatment ◽  
Sludge Treatment ◽  
Tropical Regions ◽  
Aeration Time ◽  
Sludge Stabilization ◽  
Hot Climate ◽  
Aerobic Stabilization ◽  
Sewage Sludge Treatment ◽  
High Pathogenic

The tropical regions have specific problems associated with high pathogenic density in the sewage sludge. The aim of this study was to select an adequate sludge stabilization and valorization system comparing the performance of four technologies: anaerobic stabilization without heating, aerobic stabilization, alkaline treatment with lime and aerobic composting. The study was performed in a pilot plant which was built and operated during six months. The main problem for the beneficial use of the sludge was its pathogenicity. All the systems allowed obtaining stabilized products which met the bacteriological criteria for some kind of use. The compost and the alkalinized sludge were bacteriologically safe for use without restrictions in accordance with the Mexican regulations. The accomplishment of the parasitological criteria for use was however impossible with the anaerobic and with the aerobic systems. The compost obtained at 55-60°C with 25d aeration time and the alkaline sludge fulfill the criteria established by for forest and agriculture use and for soil conditioning. The composting could reach the requirements for unrestricted use when operated at temperatures 65-70°C during 45 days which makes it the most adequate sludge treatment system for hot climate regions.

Co-composting of Dewatered Sewage Sludge with Sawdust

2006 ◽  
Vol 9 (8) ◽  
pp. 1580-1583 ◽  
Author(s):  
Edriss Bazrafshan ◽  
Mohammad ali Zazouli . ◽  
Javad Bazrafshan . ◽  
Anoushirvan Mohseni .
Keyword(s):  
Sewage Sludge ◽  
Dewatered Sewage Sludge

The effect of biosolids on cereals in central New South Wales, Australia. 1. Crop growth and yield

2005 ◽  
Vol 45 (4) ◽  
pp. 435 ◽  
Author(s):  
J. L. Cooper
Keyword(s):  
Sewage Sludge ◽  
Soil Ph ◽  
New South ◽  
New South Wales ◽  
Acid Soils ◽  
Crop Growth ◽  
Growth And Yield ◽  
South Wales ◽  
Sludge Cake ◽  
Dewatered Sewage Sludge

Two forms of biosolids, with and without lime, were applied to acid soils at 2 sites in central New South Wales. Wheat and triticale were then grown on these sites to determine the effect of biosolids on crop growth and yield. The forms of biosolids used were dewatered sewage sludge cake, and N-Viro Soil which is a lime amended sewage sludge. Dewatered sewage sludge cake was applied at rates of 0, 6, 12 and 24 dry Mg/ha, and N-Viro soil at 0, 1.5, 3.0 and 4.5 dry Mg/ha. Biosolids produced grain yield increases of over 50% at both sites, with the largest yield increases at the highest rate of dewatered sewage sludge. Continued cropping at 1 of the sites showed that significant yield increases were still obtained 3 years after the initial application. The addition of lime and N-Viro Soil raised soil pH, and produced small but long lasting yield increases. However, the main benefit of biosolids seems to have come from the nutrients they supplied rather than changes in soil pH.

Highly efficient secondary dewatering of dewatered sewage sludge using low boiling point solvents

2013 ◽  
Vol 35 (1) ◽  
pp. 95-103 ◽  
Author(s):  
Chao He ◽  
Chia-Lung Chen ◽  
Zhirong Xu ◽  
Jing-Yuan Wang
Keyword(s):  
Sewage Sludge ◽  
Boiling Point ◽  
Highly Efficient ◽  
Dewatered Sewage Sludge
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