Study on the Quantitative Evaluation of Greenhouse Gas (GHG) Emissions in Sewage-Sludge Treatment System

2020 ◽  
pp. 271-287
Author(s):  
Zhiyi Liang ◽  
Toru Matsumoto ◽  
Lei Zhang ◽  
Bing Liu
Keyword(s):  
Sewage Sludge ◽  
Greenhouse Gas ◽  
Quantitative Evaluation ◽  
Ghg Emissions ◽  
Treatment System ◽  
Sludge Treatment ◽  
Sewage Sludge Treatment

Model analysis of energy consumption and greenhouse gas emissions of sewage sludge treatment systems with different processes and scales

2010 ◽  
Vol 61 (2) ◽  
pp. 365-373 ◽  
Author(s):  
S. Soda ◽  
Y. Iwai ◽  
K. Sei ◽  
Y. Shimod ◽  
M. Ike
Keyword(s):  
Energy Consumption ◽  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
Greenhouse Gas ◽  
Ghg Emissions ◽  
N2o Emissions ◽  
Sludge Treatment ◽  
Treatment Processes ◽  
Sewage Sludge Treatment ◽  
Ch4 And N2o

An energy consumption model was developed for evaluating sewage sludge treatment plants (SSTPs) incorporating various treatment processes such as thickening, anaerobic digestion, dewatering, incineration, and melting. Based on data analyses from SSTPs in Osaka, Japan, electricity consumption intensities for thickening, anaerobic digestion, dewatering, incineration, and melting and heat consumption intensities for anaerobic digestion, incineration, and melting were expressed as functions of sludge-loading on each unit process. The model was applied for predicting the energy consumption and greenhouse gas (GHG) emissions of SSTPs using various treatment processes and power and heat generation processes using digestion gas. Results showed that SSTPs lacking incineration and melting processes but having power generation processes showed excess energy production at the high sludge-loading rate. Energy consumption of the SSTPs without incineration and melting processes were low, but their GHG emissions were high because of CH4 and N2O emissions from sludge cake at the landfill site. Incineration and melting processes consume much energy, but have lower CH4 and N2O emissions.

An emergy evaluation of the sewage sludge treatment system with earthworm compositing technology in Chengdu, China

2018 ◽  
Vol 110 ◽  
pp. 8-17 ◽  
Author(s):  
Xiaohong Zhang ◽  
Ni Xiang ◽  
Wenlong Wang ◽  
Wenjie Liao ◽  
Xiangdong Yang ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Treatment System ◽  
Sludge Treatment ◽  
Sewage Sludge Treatment ◽  
Emergy Evaluation

Methodology for the assessment of the greenhouse gas impact of wastewater sludge treatment

2010 ◽  
Vol 1 (4) ◽  
pp. 227-233 ◽  
Author(s):  
A. Åkerman ◽  
A. Massagué ◽  
S. Mehier ◽  
E. Senante ◽  
I. Escaler ◽  
...  
Keyword(s):  
Climate Change ◽  
Sewage Sludge ◽  
Greenhouse Gas ◽  
Climate Change Impact ◽  
Energy Use ◽  
Ghg Emissions ◽  
Wastewater Sludge ◽  
N2o Emissions ◽  
Sludge Treatment ◽  
Change Impact

Nitrous oxide (N2O) and methane (CH4) emissions from the wastewater sector represent the second largest source of greenhouse gas (GHG) emissions of the waste sector. A protocol has been developed to measure GHG from sewage sludge treatment. GHG measurements were performed on two industrial sewage sludge composting plants. Measurement campaigns showed GHG emissions range between 0.18 to 3.40 kgCH4\t dry sludge and 0.74 to 0.48 kg N2O\t dry sludge. Converted to CO2 equivalent to assess climate change impact, emission factors of CH4 range between 4.5 and 85 kg eq.CO2\t dry sludge and N2O range between 143 and 221 kg eq.CO2\t dry sludge when calculated with global warming potentials (GWP) of 25 and 298, respectively. In terms of climate change impact, N2O emissions contribute much more than CH4 because of its higher GWP. N2O is linked to the treatment of nitrogen and produced during the nitrification and denitrification biological processes. Process emissions measured on the two sites were compared with indirect emissions linked to operational energy use.

scholarly journals Comparative environmental sustainability study of an improved sewage sludge treatment and sludge reuse system based on emergy analysis in China

2021 ◽  
Vol 11 (9) ◽  
Author(s):  
Junxue Zhang ◽  
Lin Ma
Keyword(s):  
Sewage Sludge ◽  
Environmental Sustainability ◽  
Sewage Treatment ◽  
Treatment System ◽  
Sludge Treatment ◽  
Sludge Recycling ◽  
Sewage Sludge Treatment ◽  
Reuse System ◽  
The One ◽  
Emergy Value

AbstractAs the significant residuals in the sewage treatment system, sludge treatment and reuse play a pivotal impact on the environmental sustainability study in China. In this paper, two sewage sludge treatment systems have been investigated, calculated, and analyzed, including the conventional treatment system (Scenario A) and improved reuse system (Scenario B), respectively. The results demonstrate that (1) Compared to Scenario A, Scenario B is a comprehensive system, which integrates a sewage sludge treatment system and a brick production system for sludge recycling. (2) After considering the brick system (scenario B), on the one hand, the sludge treatment capacity has been enhanced and raised sludge utilization; on the other hand, negative influences have also generated due to the non-renewable resources input and several outputs. (3) In Scenario A and Scenario B, the input resources part reflects the main impact (about 59.6% in the entire emergy value). (4) In this new paper, the UEVs are 2.73E + 11sej/kg and 6.29E + 11sej/kg in Scenario A and Scenario B, respectively. (5) The emergy sustainability indexes (ESI) are 0.012292 and 0.00848, which express the weak comprehensive effects in Scenario A and Scenario B. (6) Scenario B has a more extensive range of change than Scenario A because of the more resource input for the sensitivity analysis. Given the all discussions, there are two effective approaches to be used for perfecting environmental sustainability in the Scenario A system and Scenario B system.

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.

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