Technical and Economic Assessment of Biogas and Liquid Energy Systems from Sewage Sludge and Industrial Waste

2018 ◽  
pp. 57-73
Author(s):  
Hossain M. Anawar ◽  
Vladimir Strezov
Keyword(s):  
Sewage Sludge ◽  
Industrial Waste ◽  
Energy Systems ◽  
Economic Assessment

Biological nutrient removal wastewater treatments and sewage sludge anaerobic mesophilic digestion performances

2002 ◽  
Vol 46 (10) ◽  
pp. 199-208 ◽  
Author(s):  
D. Bolzonella ◽  
L. Innocenti ◽  
F. Cecchi
Keyword(s):  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
Economic Assessment ◽  
Gas Production ◽  
Anaerobic Digester ◽  
Biological Nutrient Removal ◽  
Energetic Balance ◽  
Mesophilic Digestion ◽  
The Difference ◽  
Energy Balances

The paper deals with the performances of the mesophilic anaerobic digestion treatment of sewage sludge from a full scale BNR process without primary settling (nominally 300,000 PE). A relation between the activated sludge observed yields, Yobs, and the anaerobic digester performance was preliminarily found: for values of Yobs of 0.25 kgVSS/kgCOD the anaerobic digester specific gas production showed the best performances (0.22 m3/kgVSfed). This has to be confirmed with wider future studies. It was also shown the level of sludge pre-thickening to be reached for the self-sustaining warming of the digester also in wintertime. According to the energetic balance and to a comparison with an aerobic stabilisation process, it was pointed out as when a co-generation unit for heat and energy production was introduced about 3.4 kWh/PE y of energy were produced in the anaerobic digestion process. On the other hand, 4.3 kWh/PE y were spent if an aerobic stabilisation process was applied. The economic assessment, carried out on the basis of the energy balances, showed that the anaerobic digestion is always economically advantageous if compared to aerobic stabilisation processes, also for small WWTPs. According to the energetic evaluations an environmental balance was assessed, in terms of CO2 emissions. The difference between anaerobic and aerobic processes was about 5.3 kgCO2/PE y in favour of anaerobic processes application.

scholarly journals Regenerating dross : a campus for sustainable energy systems

2021 ◽  
Author(s):  
Jeff Cogliati
Keyword(s):  
Industrial Waste ◽  
Sustainable Energy ◽  
Energy Systems ◽  
Industrial Site ◽  
Urban Waste ◽  
Landscape Urbanism ◽  
Built Form ◽  
Sustainable Energy Systems ◽  
Post Industrial ◽  
Ecological Remediation

The following thesis began as an investigation into post-industrial urban waste and the ecological remediation potential that such landscapes embody. It looks at the forces behind waste landscapes or drosscapes and examines the theories associated with the ever-growing amount of waste landscapes throughout our cities. This thesis is largely centered on using Landscape Urbanism as a means of regenerating post-industrial waste sites. The Landscape Urbanists have proposed the use of landscape, rather than architecture, to transform urban waste and reconnect it back to the urban fabric. Where does architecture exist within this context? How can architecture act as a catalyst throughout this transformation? This thesis will examine how architecture and landscape can operate in unison throughout post-industrial site remediation and it will explore how built form can become an integral part of a continuous landscape.

scholarly journals Heavy Metal Contamination

2021 ◽  
Author(s):  
Soni Kumari ◽  
Amarnath Mishra
Keyword(s):  
Heavy Metal ◽  
Sewage Sludge ◽  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Metal Contamination ◽  
Industrial Waste ◽  
Inductively Coupled Plasma ◽  
Heavy Metal Contamination ◽  
Inductively Coupled

In the era of industrialization, pollution has totally deteriorated the quality and diversity of life. Heavy metal contaminations are the major causes of environment deteriorations. The basic reasons are natural as well as anthropogenic. Chief sources of heavy metal contamination are air pollution, river sediments, sewage sludge, town waste composts, agricultural chemicals like fertilizers and pesticides, and industrial waste like factories releasing chemicals, anthropogenic activities, etc. Agricultural soils in many parts of the world are generally contaminated by heavy metal toxicity such as Cd, Cu, Zn, Ni, Co, Pb, Hg, As, etc. These are due to the long-term use of phosphate fertilizers, sewage sludge, dust from smelters, industrial waste, etc. Heavy metals in soils are detected with some specific instruments like atomic absorption spectroscopy, inductively coupled plasma, inductively coupled plasma-mass spectroscopy, and X-ray fluorescence and spectroscopy. Among all these instruments, atomic absorption spectroscopy (AAS) is the best because it gives the precise quantitative determination. AAS is a method applied for measuring the quantity of the trace elements present in the soil or any other samples.

A techno-economic assessment of hybrid energy systems in rural Pakistan

Energy ◽  
2021 ◽  
Vol 215 ◽  
pp. 119103
Author(s):  
Fahad Ali ◽  
Muhammad Ahmar ◽  
Yuexiang Jiang ◽  
Mohammad AlAhmad
Keyword(s):  
Energy Systems ◽  
Economic Assessment ◽  
Hybrid Energy ◽  
Rural Pakistan ◽  
Hybrid Energy Systems

scholarly journals Evaluating the Environmental Performance of Solar Energy Systems Through a Combined Life Cycle Assessment and Cost Analysis

2019 ◽  
Vol 11 (9) ◽  
pp. 2539 ◽  
Author(s):  
Maria Milousi ◽  
Manolis Souliotis ◽  
George Arampatzis ◽  
Spiros Papaefthimiou
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Large Scale ◽  
Fossil Fuels ◽  
Energy Systems ◽  
Economic Assessment ◽  
Raw Material ◽  
Solar Thermal ◽  
Multiple Perspectives ◽  
Environmental Implications

The paper presents a holistic evaluation of the energy and environmental profile of two renewable energy technologies: Photovoltaics (thin-film and crystalline) and solar thermal collectors (flat plate and vacuum tube). The selected renewable systems exhibit size scalability (i.e., photovoltaics can vary from small to large scale applications) and can easily fit to residential applications (i.e., solar thermal systems). Various technical variations were considered for each of the studied technologies. The environmental implications were assessed through detailed life cycle assessment (LCA), implemented from raw material extraction through manufacture, use, and end of life of the selected energy systems. The methodological order followed comprises two steps: i. LCA and uncertainty analysis (conducted via SimaPro), and ii. techno-economic assessment (conducted via RETScreen). All studied technologies exhibit environmental impacts during their production phase and through their operation they manage to mitigate significant amounts of emitted greenhouse gases due to the avoided use of fossil fuels. The life cycle carbon footprint was calculated for the studied solar systems and was compared to other energy production technologies (either renewables or fossil-fuel based) and the results fall within the range defined by the global literature. The study showed that the implementation of photovoltaics and solar thermal projects in areas with high average insolation (i.e., Crete, Southern Greece) can be financially viable even in the case of low feed-in-tariffs. The results of the combined evaluation provide insight on choosing the most appropriate technologies from multiple perspectives, including financial and environmental.

Sign in / Sign up

Export Citation Format

Share Document