Waste to Energy Sewage Treatment Plant Delawas Jaipur, Rajasthan, India, a Case Study (original) (raw)
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Energy Production from Sewage Sludge in a Proposed Wastewater Treatment Plant
The implemented technologies for sewage sludge processing are still very limited in Egypt. Unfortunately, dealing with the produced sludge is mainly given to the drying process through natural drying beds neglecting quality of the dried sludge. The undertaken work is devoted to provide a design proposal for a typical wastewater treatment plant suitable for the small communities on a very limited area of land compared to that required to construct the conventional treatment plant that serves the same population. The proposed sewage treatment plant is certainly beneficial in reducing the capital costs by 26%, in addition to about 20% reduction in the running costs. On the other hand, electricity generated from energy produced by anaerobic digestion of sewage sludge reduces the electrical power requirements from the main grid network to about 27% in the proposed wastewater treatment plant.
Scientific Research Journal, 2008
Biogas is a product of decomposition of organic matter during the process of anaerobic digestion (AD). The main components are methane and carbon dioxide. The methane content in the biogas enables it to be used as fuel which can be converted to heat and electricity. The biogas generated by the anaerobic digesters has the potential to be redirected from the flaring facilities to renewable energy (RE) facilities. The biogas may then be used to generate electricity, which in turn can operate the sewage treatment plant (STP) itself. However, feedbacks from the sewerage industry indicated that heavy investments are needed for any RE initiatives on biogas generated by sewage sludge. In order to find the cost effective way of generating energy from biogas, fundamental relationships are necessary to enable development of prototype in the future. Thus, this paper presents a study to establish the relationship between the volume of sludge and the amount of power and energy that can be generated.
ENERGY PRODUCTION FROM THE SLUDGE OF A SEWAGE TREATMENT STATION (Atena Editora)
ENERGY PRODUCTION FROM THE SLUDGE OF A SEWAGE TREATMENT STATION (Atena Editora), 2022
The world population grows exponentially, and Brazil is no different. Thus, we increasingly need natural resources; and, as a consequence, there is an increase in waste production. Brazil, a few years ago, developed its National Solid Waste Policy (PNRS) through Law No. 12,305/10, where, regardless of its origin, solid waste must be disposed of properly, minimizing possible environmental damage; while CONAMA Resolution 375/06 already defined the proper disposal of sewage sludge to protect the environment and the health of the population. However, some of these residues have a significant energy value in their reuse, as is the case of urban sewage sludge. In this context, the present work aimed to evaluate the production of biogas energy from the sludge of a Sewage Treatment Station (ETE). Therefore, the collection and characterization of the sludge from the ETE was carried out by measuring pH, electrical conductivity, determination of total solids, fixed and volatile, determination of chemical and biochemical oxygen demand. The anaerobic digestion process with control of pH, temperature, pressure and mechanical agitation was carried out for 25 days, with an expressive generation of biogas being observed. Therefore, this residue, as biomass for energy production, proved to be an alternative with considerable energy potential, in addition to being an option for the proper disposal of solid waste and environmentally sustainable.
STUDY AND ANALYSIS OF BIOGAS PRODUCTION FROM SEWAGE TREATMENT PLANT & DESIGN ANAEROBIC DIGESTER
IRJET, 2022
Climate change demands clean water and sustainable energy. Advances in wastewater treatment may allow for the recovery of valuable resources like biogas and fertilizers. Long-term sewage treatment is harder. This study looks on getting biogas from STPs. The technology's applicability for various applications is examined by comparing its performance to those applications. These systems' technical and environmental performance is also evaluated. The next step is to develop a framework for monitoring sustainability and include essential indicators. This is a STP in Greater Noida, Uttar Pradesh. Annually, 1.417*106 m3 biogas may be produced, greatly lowering CO2 emissions. Combining wastewater and sludge improves biogas recovery. STPs may help achieve the SDGs (SDGs). The multilateral and cross-cutting nature of resource recovery benefits is demonstrated by their linkages with SDGs. New water treatment methods and prospect.
Processes
Sewage-water treatment comprehends primary, secondary, and tertiary steps to produce reusable water after removing sewage contaminants. However, a sewage-water treatment plant is typically a power and energy consumer and produces high volumes of sewage sludge mainly generated in the primary and secondary steps. The use of more efficient anaerobic digestion of sewage water with sewage sludge can produce reasonable flowrates of biogas, which is shown to be a consolidated strategy towards the energy self-sufficiency and economic feasibility of sewage-water treatment plants. Anaerobic digestion can also reduce the carbon footprint of energy sources since the biogas produced can replace fossil fuels for electricity generation. In summary, since the socio-economic importance of sewage treatment is high, this review examined works that contemplate: (i) improvements of sewage-water treatment plant bioenergy production and economic performances; (ii) the exploitation of technology alternativ...
Water Science and Technology, 2015
This work assessed the energy potential and alternative usages of biogas and sludge generated in upflow anaerobic sludge blanket reactors at the Laboreaux sewage treatment plant (STP), Brazil. Two scenarios were considered: (i) priority use of biogas for the thermal drying of dehydrated sludge and the use of the excess biogas for electricity generation in an ICE (internal combustion engine); and (ii) priority use of biogas for electricity generation and the use of the heat of the engine exhaust gases for the thermal drying of the sludge. Scenario 1 showed that the electricity generated is able to supply 22.2% of the STP power demand, but the thermal drying process enables a greater reduction or even elimination of the final volume of sludge to be disposed. In Scenario 2, the electricity generated is able to supply 57.6% of the STP power demand; however, the heat in the exhaust gases is not enough to dry the total amount of dehydrated sludge.
E3S Web of Conferences, 2019
The increase in sewage sludge makes it necessary to improve the direction of sewage sludge management policy and disposal, which requires a larger amount of incineration or land reclamation. It was shown that the result of methane fermentation, which is a more complex process of extracting energy contained in waste. High costs of implementation of sludge processing technology and low efficiency of sewage treatment plants in which sewage sludge is insufficient to recover energy from them, have a negative impact on the development of energy generation from sediments. The model waste system for energy is characterized, which includes two stages. The proposed solution can be applied to small wastewater treatment plants and it is justifiable to use the concept of bi-functional bioreactors in which anaerobic and aerobic processes can be carried out with much lower construction and maintenance costs. The use of bioreactors allows to exclude the energy demand needed to stabilize sewage slud...
Biogas production on industrial sewer basis
On the basis of nkana water and sewerage treatment plant (NWSC), 2.94 kg/s (75%CH4 + 25%CO2) upgraded bio methane can be produced from the 30 designed bio digesters connected in series and the scrubbing unit. In this report, a thermodynamic modeling of an integrated biogas power generation system for electricity generation is reported. This system involves a gas turbine cycle and organic Rankine cycle (ORC) where the wasted heat of gas turbine cycle is recovered by closed ORC. The net output power of the power generation system is fixed at 11249.51 KW includes 6508.43 KW power generated by GT and 4741.08KW by ORC. The design parameters of a bio methane power plant are compressor isentropic efficiency, compressor pressure ratio , gas turbine isentropic efficiency , the inlet temperature of the combustion chamber and gas turbine inlet temperature, steam turbine inlet pressure (TIP), and condenser pressure. The report also covers for the design of Bio-digester, cleaning unit, combustion chamber and selection of a suitable compressor, evaporator, gas turbine, steam generator, condenser and a pump
Energy saving in wastewater treatment plants
E3S Web of Conferences
This paper uses data from the Chisinau Wastewater Treatment Plant (WWTP) (2018 year) to analyze the potential for energy recovery from wastewater treatment plant via anaerobic digestion with biogas utilization with electricity generation. These energy recovery strategies could help offset the electricity consumption of the wastewater treatment plants and represent possible areas for sustainable energy policy implementation. We estimate that anaerobic digestion could save approximately 14, 444, 918 kWh annually in Chisinau WWTP. Anaerobic digestion is widely considered as an environmentally friendly technology for sewerage sludge. This study aims to highlight the potential as well as to provide a starting point for further studies regarding the treatment as sewerage sludge using anaerobic digestion in Republic of Moldova and recovery energy that could further reduce electricity cost and reduction of sludge cake.