Critical factors for implementing sludge processing of the Rome Wastewater Treatment Plants

2000 ◽  
Vol 41 (9) ◽  
pp. 45-52
Author(s):  
G. Mininni ◽  
A. Salera ◽  
E. Rolle ◽  
A. Carucci
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
Critical Factors ◽  
Factors Affecting ◽  
Capital Costs ◽  
Unit Costs ◽  
Thermal Drying ◽  
Sludge Cake ◽  
The City ◽  
Disposal Cost

The use of sludge thermal drying after mechanical dewatering implies a sharp increase in capital costs but can be effective in reducing both transport and disposal costs. In this paper the most critical factors affecting economics in implementing with sludge thermal drying the four wastewater treatment plants serving the city of Rome are discussed. As alternatives, replacement of belt presses with filter presses in the plant of Rome East, due to the low concentration of sludge cake (18%) presently produced, and centralised treatment in the plant of Rome South of the sludge produced in this plant and in the plant of Rome Ostia are also considered. Thermal drying appeared more convenient especially when dewatering operation is poorly performed (Rome East), but in the large plants (Rome South alone or with Ostia) the upgrading of the plant is always economical. Other contingent and local situations can also play an important role in this prospect (distance from the landfill site, transport and disposal unit costs), thus making not convenient the adoption of thermal drying for the plants of Rome North and Ostia. For disposal cost lower than 52 ECU/t replacement of the present belt presses with filter presses in Rome East plant is more advantageous than the construction of a drying plant.

The eco-efficiency assessment of wastewater treatment plants in the city of Mashhad using emergy and life cycle analyses

2020 ◽  
Vol 249 ◽  
pp. 119327 ◽  
Author(s):  
Sadegh Alizadeh ◽  
Hamid Zafari-koloukhi ◽  
Fatemeh Rostami ◽  
Masoud Rouhbakhsh ◽  
Akram Avami
Keyword(s):  
Wastewater Treatment ◽  
Life Cycle ◽  
Wastewater Treatment Plants ◽  
Efficiency Assessment ◽  
The City

scholarly journals Benchmarking of large municipal wastewater treatment plants treating over 100,000 PE in Austria

2008 ◽  
Vol 57 (10) ◽  
pp. 1487-1493 ◽  
Author(s):  
S. Lindtner ◽  
H. Schaar ◽  
H. Kroiss
Keyword(s):  
Wastewater Treatment ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Operating Costs ◽  
Municipal Wastewater Treatment ◽  
Design Capacity ◽  
Capital Costs ◽  
Process Indicators ◽  
Benchmarking System

During a six-year period the Austrian Benchmarking System was developed. The main objectives of this benchmarking system are the development of process indicators, identification of best performance and determination of cost reduction potentials. Since 2004 this system is operated via an internet platform and automated to a large extent. Every year twenty to thirty treatment plants use the web-based access to this benchmarking platform. The benchmarking procedure comprises data acquisition, data evaluation including reporting and organised exchange of experience for the treatment plant managers. The process benchmarking method links the real costs with four defined main processes and two support processes. For wastewater treatment plants with a design capacity >100,000 PE these processes are further split up into sub-processes. For each (sub-) process the operating costs are attributed to six cost elements. The specific total yearly costs and the yearly operating costs of all (sub-)processes are related to the measured mean yearly pollution load of the plant expressed in population equivalents (PE110: 110 gCOD/d corresponding to 60 g BOD5/d)). The specific capital costs are related to the design capacity (PE). The paper shows the benchmarking results of 6 Austrian plants with a design capacity >100,000 PE representing approximately 30% of the Austrian municipal wastewater treatment plant capacity.

scholarly journals Estimating the costs of collective treatment of wastewater: the case of Walloon Region (Belgium)

2010 ◽  
Vol 62 (3) ◽  
pp. 640-648 ◽  
Author(s):  
Thomas Dogot ◽  
Yanni Xanthoulis ◽  
Nathalie Fonder ◽  
Dimitri Xanthoulis
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
Integrated Approach ◽  
Decision Makers ◽  
Large Set ◽  
Strategic Choices ◽  
Unit Costs ◽  
Treatment Facilities ◽  
Walloon Region

This paper contributes to a better understanding of costs for collective wastewater treatment in the Walloon Region (Belgium). Based on a large set of data, unit costs to population equivalents are modelled. Considering investment as well as exploitation costs, the model includes not only wastewater treatment plants but also collector and sewage networks in an integrated approach at the technical basin level. Beyond this modelling, each type of process is analyzed independently in order to explore the structure of investment costs and their variation factors. Then, the model was used to forecast the upcoming expenses for 36 areas which are not yet equipped with collective wastewater treatment facilities. In light of these results, strategic choices for decision makers are discussed.

Procuring 230 Football Fields of Membrane - Strategy, Results and Lessons Learned

2016 ◽  
Vol 11 (2) ◽  
pp. 266-272
Author(s):  
J. Grundestam
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
Action Plan ◽  
Lessons Learned ◽  
Residential Areas ◽  
The Baltic Sea ◽  
The Baltic ◽  
The City ◽  
The Eu

Stockholm is currently one of Europe’s fastest growing cities, with its population increasing by approximately 1.5% per year, corresponding to 15,000 to 20,000 people. Sweden’s commitment to the Baltic Sea Action Plan and the EU Water Directive will lead to more stringent effluent requirements (6 mg-Tot-N/l, 0.2 mg-Tot-P/l and 6 mg-BOD7/l), and wastewater treatment in Stockholm will require major investment to handle these challenges. As Stockholm Vatten’s two wastewater treatment plants (WWTPs) – Bromma, 320,000 people, and Henriksdal, 780,000 people – are both located in or near residential areas in the city, plant development must be coordinated with its needs on economic, political, sustainable and long-term bases. Both WWTPs being facilities located underground also pose a challenge for any extension works.

scholarly journals SARS-CoV-2 in wastewater treatment plants

2020 ◽  
Author(s):  
Maria Cristina Collivignarelli ◽  
Carlo Collivignarelli ◽  
Marco Carnevale Miino ◽  
Alessandro Abbà ◽  
Roberta Pedrazzani ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Sewage Sludge ◽  
Critical Review ◽  
Wastewater Treatment Plants ◽  
State Of The Art ◽  
In Vitro Experiments ◽  
Sars Coronavirus ◽  
Factors Affecting ◽  
Infected People

AbstractAs for the SARS coronavirus in the 2003 epidemic, the presence of SARS-CoV-2 has been demonstrated in faeces and, in some cases, urine of infected people, as well as in wastewater. This paper proposes a critical review of the state of the art regarding studies on the presence of SARS-CoV-2 in wastewater and sewage sludge, the factors affecting its inactivation and the main proposed treatments, with the aim to provide useful information at operative level in order to better and safer manage wastewater and sewage sludge. Given the lack of literature on SARS-CoV-2, studies involving other HCoVs such as SARS-CoV and HCoV-229E have been also considered. In wastewater, the resistance of SARS-CoV has proven to be very limited, especially at temperatures above 20 °C, and the virus has been easily removed with the use of chlorine (> 0.5 mg L−1 for 30 min). For sewage sludge, based on in vitro experiments, it is suggested to increase the retention times before a possible reuse in agriculture only for precautionary purposes, since SARS-CoV-2 is unlikely to occur in the sludge. SARS-CoV-2 in wastewater might track the epidemic trends: although being extremely promising, an effective and wide application of this approach requires a deeper knowledge of the amounts of viruses excreted through the faeces and the actual detectability of viral RNA in sewage.

Monitoring of carbamazepine concentrations in wastewater and groundwater to quantify sewer leakage

2005 ◽  
Vol 52 (5) ◽  
pp. 205-213 ◽  
Author(s):  
R. Fenz ◽  
A.P. Blaschke ◽  
M. Clara ◽  
H. Kroiss ◽  
D. Mascher ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Groundwater Pollution ◽  
Wastewater Treatment Plants ◽  
Regional Scale ◽  
Domestic Wastewater ◽  
Limit Of Quantification ◽  
Wide Scale ◽  
The City ◽  
Bank Infiltration ◽  
Dry Weather Flow

Monitoring of carbamazepine concentrations in wastewater and groundwater enables us to identify and quantify sewer exfiltration. The antiepileptic drug carbamazepine is hardly removed in wastewater treatment plants and not or just slightly attenuated during bank infiltration and subsoil flow. Concentrations in wastewater are generally 1,000 times higher than the limit of quantification. In contrast to many other wastewater tracers carbamazepine is discharged to the environment only via domestic wastewater. The results from this study carried out in Linz, Austria indicate an average exfiltration rate of 1%, expressed as percentage of the dry weather flow that is lost to the groundwater on the city-wide scale. This rate is lower than sewage losses reported in most other studies which attempted to quantify exfiltration on the basis of groundwater pollution. However, it was also possible to identify one area with significantly higher sewage losses. This method seems to be very suitable for the verification of leakage models used to assess sewer exfiltration on a regional scale.

Ultraviolet Disinfection in Municipal Wastewater Treatment Plants

1990 ◽  
Vol 22 (7-8) ◽  
pp. 145-152 ◽  
Author(s):  
Jan Maarschalkerweerd ◽  
Rory Murphy ◽  
Gail Sakamoto
Keyword(s):  
Wastewater Treatment ◽  
Fecal Coliform ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Cost Effective ◽  
Uv Disinfection ◽  
Municipal Wastewater Treatment ◽  
Capital Costs ◽  
Effective Manner ◽  
Municipal Wastewater Treatment Plants

Pilot and full-scale studies of UV disinfection of wastewater have demonstrated that the process could consistently meet an effluent fecal coliform standard of 200/100 mL or less, depending on suspended solids and UV transmission. Since 1984 over three hundred systems have been installed at municipal wastewater treatment plants in North America. The majority of these are in treatment plants which have been using chlorination. The UV systems have been retrofitted into the existing chlorine contact tanks or existing channels. The capital costs of retrofitting compare favourably to the costs of upgrading chlorination systems, especially when de-chlorination equipment is required. As experience is gained in the operation of these UV systems, their performance has been monitored for their disinfection efficiency and cost of operation. Several installations are examined and their performance and costs analyzed. The evidence to date supports the premise that UV disinfection can meet demands for reliable effluent disinfection in a cost effective manner.

A procedure for estimating the capital cost of Ontario wastewater treatment plant using CAPDET

1988 ◽  
Vol 15 (5) ◽  
pp. 799-806 ◽  
Author(s):  
David G. Wright ◽  
Gilles G. Patry ◽  
Charles E. Letman ◽  
Donald R. Woods
Keyword(s):  
Wastewater Treatment ◽  
Cost Estimation ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Construction Cost ◽  
Capital Cost ◽  
Specific Design ◽  
Cost Estimates ◽  
Unit Costs ◽  
Treatment Facilities

CAPDET is a computer-assisted procedure for the design and evaluation of wastewater treatment facilities developed by the U.S. Army Corps of Engineers and the U.S. Environmental Protection Agency. The purpose of this study was to develop a procedure for applying CAPDET to the capital cost estimation of Canadian wastewater treatment plants without altering the source code. The proposed methodology is simple and efficient, requiring no additional data to that normally used in CAPDET.A total of 10 Canadian wastewater treatment plants were studied which included many of the treatment processes used in Canada. Six plants were used to develop the procedure while four plants were used to verify the procedure. The design flow for the selected plants ranged between 550 and 13 600 m3/d. Construction cost estimates generated using site-specific design information were compared with those obtained using the default database provided in CAPDET. The importance of the various unit costs on the total plant cost was also determined.Under the proposed methodology, unit costs are first adjusted to the date of construction using appropriate inflation indices. Wall concrete, slab concrete, and excavation costs are increased by an additional 15, 50, and 25%, respectively, to account for differences in construction practice. A final estimate reduction of 15% is performed to account for Canadian conditions.The procedure provides construction cost estimates that are within ± 20% of actual construction costs with a mean absolute error of 11% and an average error of 2.3%. Site-specific design data had little effect on the construction cost estimates with the exception of lagoon treatment facilities. Utilities and support facilities accounted for 20–30% of the cost estimates. The most significant cost parameters were the inflation index values and concrete and building unit costs. Key words: capital cost, construction cost estimation, wastewater treatment plant, mathematical modelling, calibration, verification.

Sign in / Sign up

Export Citation Format

Share Document