An Introduction to Sludge Hand Treat Disposal
An Introduction to Sludge Hand Treat Disposal
Source: https://www.cedengineering.com/
Author by: J. Paul Guyer, Fellow ASCE, Fellow AEI
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Energy from Wastewater Sewage Sludge in Lebanon
The Ministry of Energy and Water (MEW) and the Council for Development and Reconstruction (CDR) are considering investing in energy produced from
wastewater sludge through anaerobic digestion (AD). Currently, Lebanon has only a few constructed wastewater treatment plants (WWTPs), however many
others are either under construction, under designphase assessment, or are envisioned to be assessed in the future. The goal of this study is to undergo a feasibility assessment to identify the WWTPs that meet the conditions to implement AD and elaborate the related technical specifications.
Energy from Wastewater Sewage Sludge in Lebanon
The Ministry of Energy and Water (MEW) and the Council for Development and Reconstruction (CDR) are considering investing in energy produced from
wastewater sludge through anaerobic digestion (AD). Currently, Lebanon has only a few constructed wastewater treatment plants (WWTPs), however many
others are either under construction, under designphase assessment, or are envisioned to be assessed in the future. The goal of this study is to undergo a feasibility assessment to identify the WWTPs that meet the conditions to implement AD and elaborate the related technical specifications.
Study of Biogas Production by Anaerobic Digestion of Sewage Treatment Plant Sludge
Abstract
In this study, a characterization protocol of sewage sludge in Algeria was carried out. Their objective was to study the process of anaerobic digestion for the production of biogas by analogy to experiments which have already been made in the literature on sludge have the same characteristic as our own product. Five models have been proposed to simulate the anaerobic digestion process; three for the production of biogas and two models for the degradation of organic matter. The performance of the proposed models have been validated with experimental data from the literature. The modeling of the volume of biogas produced was carried out by that of Gompertz and models proposed for different products. We observed a good agreement of the models proposed with the experimental data with a maximum value in r 2 = 0.9996 and minimum in ESM = 6.34 10 -4 . The modeling of the degradation of organic matter was carried out by the first order model (eq IV.19), and dimensionless models proposed. The latter gave a good agreement with the experimental data better than the model of the literature with a maximum value in r 2 = 0.9985 and minimum in ESM = 8.91 10 -4 .
Study of Biogas Production by Anaerobic Digestion of Sewage Treatment Plant Sludge
Abstract
In this study, a characterization protocol of sewage sludge in Algeria was carried out. Their objective was to study the process of anaerobic digestion for the production of biogas by analogy to experiments which have already been made in the literature on sludge have the same characteristic as our own product. Five models have been proposed to simulate the anaerobic digestion process; three for the production of biogas and two models for the degradation of organic matter. The performance of the proposed models have been validated with experimental data from the literature. The modeling of the volume of biogas produced was carried out by that of Gompertz and models proposed for different products. We observed a good agreement of the models proposed with the experimental data with a maximum value in r 2 = 0.9996 and minimum in ESM = 6.34 10 -4 . The modeling of the degradation of organic matter was carried out by the first order model (eq IV.19), and dimensionless models proposed. The latter gave a good agreement with the experimental data better than the model of the literature with a maximum value in r 2 = 0.9985 and minimum in ESM = 8.91 10 -4 .
Odor Control
20 years ago there was little talk of odor control. WWTP’s and PS were located out of town, and odor was not a problem.
Today odor control is generally considered an essential process in sewage treatment plant design, and in many other industries.
Odor Control
20 years ago there was little talk of odor control. WWTP’s and PS were located out of town, and odor was not a problem.
Today odor control is generally considered an essential process in sewage treatment plant design, and in many other industries.
Wastewater Biogas to Energy
Overview
The organic matter in raw wastewater contains almost 10 times the energy needed to treat it. Some wastewater treatment works (WWTW) can produce up to 100% of the energy they need to operate, though more typically 60% of operational energy can be produced. Biogas is typically used to meet on site power and thermal energy needs. Export of gas to local industrial users, power producers or for use as a municipal vehicle fleet fuel is also possible. In a wastewater treatment works (WWTW) biogas is produced when sludge decomposes in the absence of oxygen, in digesters. This process is referred to as Anaerobic Digestion. South Africa was one of the first countries in the world to utilise digesters as part of sludge management at WWTW. Digesters at WWTW were, however, not built to capture and use the biogas produced, but rather to assist in sludge management. In most cases, digesters can actually be refurbished to allow for biogas collection.
Biogas (a methane-rich natural gas) derived from anaerobic digestion and captured at WWTW plants provides a renewable energy source which can be used for electricity, heat and biofuel production. At the same time the sludge is stabilized and its dry matter content is reduced. This sludge, or digestate (remaining solid matter after the gas has been removed), contains valuable chemical nutrients such as nitrogen and potassium, and can be used as an organic fertilizer.
Wastewater Biogas to Energy
Overview
The organic matter in raw wastewater contains almost 10 times the energy needed to treat it. Some wastewater treatment works (WWTW) can produce up to 100% of the energy they need to operate, though more typically 60% of operational energy can be produced. Biogas is typically used to meet on site power and thermal energy needs. Export of gas to local industrial users, power producers or for use as a municipal vehicle fleet fuel is also possible. In a wastewater treatment works (WWTW) biogas is produced when sludge decomposes in the absence of oxygen, in digesters. This process is referred to as Anaerobic Digestion. South Africa was one of the first countries in the world to utilise digesters as part of sludge management at WWTW. Digesters at WWTW were, however, not built to capture and use the biogas produced, but rather to assist in sludge management. In most cases, digesters can actually be refurbished to allow for biogas collection.
Biogas (a methane-rich natural gas) derived from anaerobic digestion and captured at WWTW plants provides a renewable energy source which can be used for electricity, heat and biofuel production. At the same time the sludge is stabilized and its dry matter content is reduced. This sludge, or digestate (remaining solid matter after the gas has been removed), contains valuable chemical nutrients such as nitrogen and potassium, and can be used as an organic fertilizer.
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