scholarly journals ANALYSIS OF REDUCTION OF GREENHOUSE EFFECT GAS BY SYNTHESIZING SLUDGE DISPOSAL FACILITIES IN RURAL AREA : A CASE STUDY OF GUNMA PREFECTURE

2016 ◽  
Vol 72 (6) ◽  
pp. II_45-II_56
Author(s):  
Toyohiko NAKAKUBO ◽  
Midori KOBAYASHI
Keyword(s):  
Rural Area ◽  
Greenhouse Effect ◽  
Sludge Disposal ◽  
Greenhouse Effect Gas

Case study on the implementation of deammonification for the process water treatment of Munich WWTPs

2012 ◽  
Vol 65 (10) ◽  
pp. 1895-1902 ◽  
Author(s):  
Rita Hilliges ◽  
Eberhard Steinle ◽  
Bernhard Böhm
Keyword(s):  
Water Treatment ◽  
Operating Costs ◽  
Process Water ◽  
Second Stage ◽  
Sludge Disposal ◽  
Sludge Digestion ◽  
High Investment ◽  
Flow Treatment

The two-staged WWTP ‘Gut Grosslappen’ has a capacity of 2 mio. PE. It comprises a pre-denitrification in the first stage using recirculation from the nitrifying second stage. A residual post-denitrification in a downstream sand filter is required in order to achieve the effluent standards. Presently the process water from sludge digestion is treated separately by nitrification/denitrification. Due to necessary reconstruction of the biological stages, the process water treatment was included in the future overall process concept of the WWTP. A case study was conducted comparing the processes nitritation/denitrititation and deammonification with nitrification/denitrification including their effect on the operational costs of the planned main flow treatment. Besides the different operating costs the investment costs required for the process water treatment played a significant role. Six cases for the process water treatment were compared. As a result, in Munich deammonification can only be recommended for long-term future developments, due to the high investment costs, compared with the nitritation/denitritation alternative realizable in existing tanks. The savings concerning aeration, sludge disposal and chemicals were not sufficient to compensate for the additional investment costs. Due to the specific circumstances in Munich, for the time being the use of existing tanks for nitritation/denitritation proved to be most economical.

scholarly journals Analysis of Rural Area Resilience Against Earthquake; Case Study: Shirvan District (Boroujerd County)

2016 ◽  
Vol 7 (2) ◽  
pp. 272-285
Author(s):  
Seyed Hedayatollah Noori ◽  
Farkhondeh Sepahvand
Keyword(s):  
Rural Area

Understanding the Greenhouse Effect: Is Global Warming Real? An Integrated Lab-Lecture Case Study for Non-science Majors

2000 ◽  
Vol 77 (12) ◽  
pp. 1602 ◽  
Author(s):  
R. Brzenk ◽  
A. Moore ◽  
M. J. Alfano ◽  
P. T. Buckley ◽  
M. E. Newman ◽  
...  
Keyword(s):  
Global Warming ◽  
Greenhouse Effect ◽  
Science Majors

scholarly journals Visualizing the Greenhouse Effect: Restructuring Mental Models of Climate Change Through a Guided Online Simulation

2019 ◽  
Vol 9 (1) ◽  
pp. 14 ◽  
Author(s):  
Ian Thacker ◽  
Gale Sinatra
Keyword(s):  
Climate Change ◽  
Undergraduate Students ◽  
Greenhouse Effect ◽  
Research Study ◽  
Visual Representations ◽  
Learning Trajectory ◽  
Causal Inferences ◽  
Design Based Research ◽  
Online Simulation

The purpose of this design based research study was to better understand and build from students’ perceptual experiences of visual representations of the greenhouse effect. Twenty undergraduate students were interviewed as they engaged with an online visualization for the learning of the greenhouse effect. We found that, even though all students agreed that climate change is happening, a majority initially held a misconception about how it works. Upon engaging with the visualization, students made perceptual inferences and formulated causal rules that culminated in an improved description of how climate change works. This trajectory was supported with prompts from the interviewer to make predictions, observe specific interactions in the visualization and revise their causal inferences based on these observations. A case study is presented to illustrate a typical learning trajectory.

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