scholarly journals Suitability Pre-Assessment of in-Sewer Heat Recovery Sites Combining Energy and Wastewater Perspectives

Energies ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 6680
Author(s):  
Franz Huber ◽  
Georg Neugebauer ◽  
Thomas Ertl ◽  
Florian Kretschmer
Keyword(s):  
Heat Recovery ◽  
Treatment Plant ◽  
Heat Extraction ◽  
Temperature Sensitive ◽  
Heating And Cooling ◽  
Treatment Processes ◽  
Sewer Systems ◽  
Novel Approach ◽  
Close Distance

In many countries around the world heating (and cooling) has been and will remain the biggest energy sector, but it is still widely dominated by fossil energy sources today. Wastewater as a source of renewable energy contains large amounts of heat and due to its place-bound localization in urban sewer systems it is usually also situated in very close distance to potential heat consumers. However, one has to keep in mind that heat extraction from wastewater might have undesired impacts on temperature-sensitive treatment processes in the related wastewater treatment plant (WWTP). To assess the potential impact of in-sewer heat recovery on inflow temperature, two different approaches are available today: a simple (but less significant) alligation alternate, or very accurate (but less practical) mathematical models. To close the gap between practicability and significance this article introduces a novel approach to pre-assess the suitability of in-sewer heat recovery sites based on little and easily available data considering energy- and wastewater-related perspectives. A case study application demonstrates the informative value and general usability of the approach. Consequently, the proposed procedure can provide guidance and a template for related investigations at any place in a conventional (combined or separated) sewer system.

Predicting the sound power and impact of a wastewater treatment plant

2001 ◽  
Vol 44 (2-3) ◽  
pp. 235-242 ◽  
Author(s):  
B. De heyder ◽  
P. Ockier ◽  
R. Jansen ◽  
R. Huiberts
Keyword(s):  
Wastewater Treatment ◽  
Empirical Model ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Empirical Models ◽  
Sound Power ◽  
Water Line ◽  
Model Derivation ◽  
Close Distance

Several process units at a wastewater treatment plant (WWTP) can produce a significant level of sound and thus induce sound nuisance for nearby residents. The risk for sound nuisance should be considered by making a prognosis of sound impact in an early project phase (planning, design). A prognosis requires information with respect to the sound characteristics of the different process units. This paper reports the development of empirical models for the sound power of relevant process units in the water line at Aquafin WWTPs. The used methodology for model derivation and validation allowed us to minimize the required number of measurements. Besides the methodology, the paper describes in detail the derivation and validation of the empirical model for the splashing water of screw pumps. Also the use of all the derived empirical models to determine the sound impact of a wastewater treatment plant at close distance is illustrated with a case-study.

Simulation of the wastewater temperature in sewers with TEMPEST

2008 ◽  
Vol 57 (11) ◽  
pp. 1809-1815 ◽  
Author(s):  
David J. Dürrenmatt ◽  
Oskar Wanner
Keyword(s):  
User Interfaces ◽  
Heat Recovery ◽  
Treatment Plant ◽  
Interactive Simulation ◽  
Wastewater Discharge ◽  
Sewer Pipe ◽  
Ambient Conditions ◽  
Balance Equations ◽  
Surrounding Soil

TEMPEST is a new interactive simulation program for the estimation of the wastewater temperature in sewers. Intuitive graphical user interfaces assist the user in managing data, performing calculations and plotting results. The program calculates the dynamics and longitudinal spatial profiles of the wastewater temperature in sewer lines. Interactions between wastewater, sewer air and surrounding soil are modeled in TEMPEST by mass balance equations, rate expressions found in the literature and a new empirical model of the airflow in the sewer. TEMPEST was developed as a tool which can be applied in practice, i.e., it requires as few input data as possible. These data include the upstream wastewater discharge and temperature, geometric and hydraulic parameters of the sewer, material properties of the sewer pipe and surrounding soil, ambient conditions, and estimates of the capacity of openings for air exchange between sewer and environment. Based on a case study it is shown how TEMPEST can be applied to estimate the decrease of the downstream wastewater temperature caused by heat recovery from the sewer. Because the efficiency of nitrification strongly depends on the wastewater temperature, this application is of practical relevance for situations in which the sewer ends at a nitrifying wastewater treatment plant.

Reality or myth: “Advanced wastewater treatment technologies cannot be cost competitive with conventional treatment processes”

2011 ◽  
Vol 6 (1) ◽  
Author(s):  
Ali R. Ahmadi Motlagh ◽  
Stephen Lacy ◽  
Madan Arora ◽  
Jim Ross ◽  
Jeff Misenhimer
Keyword(s):  
Wastewater Treatment ◽  
Conventional Treatment ◽  
Treatment Plant ◽  
Advanced Treatment ◽  
Recycled Water ◽  
Treatment Technology ◽  
Treatment Processes ◽  
Treatment Technologies ◽  
Two Alternatives

With shortage of water becoming a major concern in many areas, use of recycled water is a necessity for a growing number of municipalities. This paper describes a case study in which two alternatives were considered for upgrading an existing wastewater treatment plant with the goal of producing recycled water. The first alternative consisted of conventional secondary and tertiary unit processes while the second alternative included the advanced treatment technology of membrane bioreactor (MBR). Also, two alternatives were evaluated for disinfection of recycled water; chlorine gas and UV system. The more advanced treatment technologies (MBR + UV), which produce the higher quality recycled water, resulted in higher cost. The paper discusses the design and project execution approaches as how the more expensive advanced treatment processes were made cost competitive with the conventional treatment processes.

scholarly journals Application of integrated MBR in a centralized WTP for a chemical industrial park: A case study in China

2018 ◽  
Vol 13 (3) ◽  
pp. 594-598
Author(s):  
Zhang Jinsong ◽  
Liu Jerry
Keyword(s):  
Industrial Wastewater ◽  
Treatment Plant ◽  
Cost Effective ◽  
Chinese Government ◽  
Treatment Processes ◽  
Chemical Industrial Park ◽  
Porous Resin ◽  
Aerated Filter

Abstract Wastewaters from chemical industries usually contain pollutants which are toxic and non-biodegradable. Treatment of chemical wastewaters is always a challenging topic in view of the stringent environmental regulations that have to be adhered to. Since 2014, the Chinese government has been continuously tightening the industrial wastewater (IWW) discharge standards, which requires improved quality of IWW effluent. This poses great challenges to the chemical industries in China, especially to many of the chemical industry clusters where the wastewaters usually contain more toxic and non-biodegradable contaminants. Membrane bioreactor (MBR) technology has been proved to be a reliable and cost-effective solution for the treatment of IWW. However, MBR alone could not effectively remove non-biodegradable organics, it needs to be integrated with advanced oxidization process and/or other physical-chemical treatment processes to improve the overall treatment efficiency. In this paper, studies on the performance of different integrated MBR processes in Industrial Wastewater Treatment Plant-A (IWTP-A) will be discussed, including Fenton + MBR, MBR + ozonation + biological aerated filter, and MBR + porous resin sorption.

scholarly journals Innovative use of lamella clarifiers for central stormwater treatment in separate sewer systems

2013 ◽  
Vol 69 (8) ◽  
pp. 1606-1611 ◽  
Author(s):  
Gebhard Weiss
Keyword(s):  
Settling Tank ◽  
Treatment Plant ◽  
Simulation Method ◽  
Structural Flexibility ◽  
Stormwater Treatment ◽  
Treatment Efficiency ◽  
The Past ◽  
Sewer Systems ◽  
Small Footprint

Lamella settlers have been used in the past few years for the sedimentation of particles in wastewater and stormwater applications. A new and very innovative approach for the treatment of stormwater flows is proposed which extends the portfolio of solutions beyond traditional settling tanks. Surface runoff is stored in a sewer or a basin and finally treated in a small but continuously operated lamella clarifier. The low throughput flow will yield good treatment efficiency at a small footprint. The possibilities of using existing storage volume in a storm sewer, as well as the structural flexibility of the arrangement are decisive benefits. As a large operational advantage, the lamellae may be cleaned mechanically, e.g. by pivoting under water. Finally, the flow and the sludge which will be sent to the downstream treatment plant will be minimized. A new comparative simulation method is proposed in order to assess an equivalent degree of stormwater treatment, either by achieving an equal annual volume of treated stormwater or, more directly, an equal amount of spilled pollutant load. The new solution is compared with a traditional settling tank according to current German design rules. Additionally, a case study from a real installation will be presented.

scholarly journals Potential influence of sewer heat recovery on in-sewer processes

2019 ◽  
Vol 80 (12) ◽  
pp. 2344-2351 ◽  
Author(s):  
Mohamad Abdel-Aal ◽  
Raffaella Villa ◽  
Natalia Jawiarczyk ◽  
Luca Alibardi ◽  
Henriette Jensen ◽  
...  
Keyword(s):  
Hydrogen Sulphide ◽  
Urban Areas ◽  
Heat Recovery ◽  
Heat Extraction ◽  
Heat Sources ◽  
Sewer Pipes ◽  
Biochemical Processes ◽  
Study Approach ◽  
Heat Demand

Abstract Heat recovery from combined sewers has a significant potential for practical renewable energy provision as sources of heat demand and sewer pipes are spread across urban areas. Sewers are continuously recharged with relatively hot wastewater, as well as interacting with heat sources from surrounding air and soil. However, the potential effects of modifying sewage temperature on in-sewer processes have received little attention. The deposition of fats, oils and greases (FOGs) and hydrogen sulphide formation are biochemical processes and are thus influenced by temperature. This paper utilises a case study approach to simulate anticipated temperature reductions in a sewer network due to heat recovery. A laboratory investigation into the formation of FOG deposits at temperatures varying between 5 °C and 20 °C provided mixed results, with only a weak temperature influence, highlighting the need for more research to fully understand the influence of the wastewater composition as well as temperature on FOG deposit formation. A separate modelling investigation into the formation of hydrogen sulphide when inflow temperature is varied between 5 °C and 20 °C showed considerable reductions in hydrogen sulphide formation. Hence, heat extraction from sewers could be a promising method for managing some in-sewer processes, combined with traditional methods such as chemical dosing.

Solar Energy for Sludge Drying in Alexandria Metropolitan Area: Case Study in Egypt

1990 ◽  
Vol 22 (12) ◽  
pp. 193-204 ◽  
Author(s):  
A. A. Hossam ◽  
S. G. Saad ◽  
H. H. Mitwally ◽  
L. M. Saad ◽  
L. Noufal
Keyword(s):  
Heavy Rainfall ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Climatic Conditions ◽  
Wet Season ◽  
Drying Time ◽  
Treatment Processes ◽  
Sludge Drying

An experimental study was conducted to assess the drainability of sludge generated by different treatment processes, and to assess a pilot solar heated sand drying bed in comparison with the regular beds located in the pilot plant at Alexandria Eastern Sewage Treatment Plant. It was found that the climatic conditions were generally favourable for dewatering sludge on sand drying beds except when there was heavy rainfall during the wet season which prolonged the drying time. The solar air heated drying beds saved about 35% of the bed area as compared with conventional sand drying beds, and the drying time was cut from 18 days to 8 days. It was also found that the solar air heated beds were less expensive than the conventional open sand beds.

350 Euston Road: Improving building performances and carbon footprint with innovative heating, ventilation and air conditioning solutions – A case study

2017 ◽  
Vol 38 (6) ◽  
pp. 650-662
Author(s):  
Phil Draper
Keyword(s):  
Carbon Footprint ◽  
Heat Recovery ◽  
Electric Energy ◽  
Integrated Approach ◽  
Energy Performance ◽  
Heat Pumps ◽  
Low Carbon ◽  
Heating And Cooling ◽  
The Uk

This case study paper describes the advantages of how heat pumps with heat recovery worked to contribute to improving energy performance and reducing the carbon footprint of buildings, with a short payback, thus showing it is a viable technology for energy cost reduction and for improving the environmental impact of buildings within the UK. All actions were taken based on performance for both the current and the future expected needs of the building and are measured against a baseline. The research and results confirm that heat pumps with heat recovery are a viable solution for London office buildings offering an integrated approach to building heating and cooling. The project resulted in a final reduction of 62% on the base building controlled utilities (total building less occupier power). The added benefits will be around the carbon benefits that the resultant 86% reduction in gas will bring due to the gradual de-carbonisation of the electric energy production in the UK. Practical application: This paper illustrates how to utilise an existing building’s energy use data to determine how relatively simple technology can optimise the provision of simultaneous heating and cooling for comfort. It also details how modelled data can be used to allow the correct sizing of equipment to deliver both good internal comfort and low carbon emissions.

Reduksi Energi Pengolahan Air Limbah di Kawasan Industri Dengan Implementasi Teknologi Food Chain Reactor (Studi Kasus : Kawasan Industri Jababeka Bekasi)

2020 ◽  
Vol 5 (3) ◽  
Author(s):  
Temmy Wikaningrum ◽  
Rijal Hakiki
Keyword(s):  
Energy Consumption ◽  
Food Chain ◽  
Biological Treatment ◽  
Treatment Plant ◽  
Industrial Area ◽  
Oxidation Ditch ◽  
Cost Component ◽  
Food Industries ◽  
Treatment Processes

Biological-aerobic process is a technology that is often chosen to treat wastewater in industrial areas, especially industries related to food industries. Compared to chemical treatment and advanced treatment, biological treatment is relatively more efficient in the costs required. However, in conventional biological treatment the amount of energy consumption in the process is a major cost component that it becomes one of the challenges in implementing this technology. This paper contains a review of the implementation of the Food Chain Reactor (FCR) technology in treating industrial area wastewater, focusing on an overview of energy consumption compared to conventional biological-aerobic treatment of oxidation ditch (OD). FCR is a wastewater treatment plant (IPAL) that combines Integrated Fixed Film Activated Sludge (IFAS) technology and technology that resembles Constructed Wetland, thus enabling the simultaneous physical, biological and biochemical treatment processes within the reactor. In this case study, the implementation succeeded in showing a reduction in energy consumption by 46.4% while maintaining an efficiency decrease in BOD by 83% and efficiency in decreasing ammonia by 82%. As with the OD process, in this FCR study showed that the denitrification process has not been successful.

Case study: Use of flotation for industrial stormwater treatment

2014 ◽  
Vol 9 (3) ◽  
pp. 392-397 ◽  
Author(s):  
Boris S. Ksenofontov ◽  
Mikhail V. Ivanov
Keyword(s):  
Treatment Plant ◽  
Hydropower Plant ◽  
Stormwater Treatment ◽  
Novel Approach

This article presents a novel approach in industrial stormwater treatment based on flotation. For this use, the technique has some significant enhancements, including the addition of a sorption filter in the flotation tank. The approach was implemented at the Ust'-Ilimskaya hydropower plant. This type of stormwater treatment plant may be used when the strictest stormwater drainage rules are applied.

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