scholarly journals An Overview on Major Design Constraints, Impact and Challenges for a Conventional Wastewater Treatment Design

2020 ◽  
Vol 9 (1) ◽  
pp. 7-16
Keyword(s):  
Wastewater Treatment ◽  
Analytical Calculation ◽  
Treatment Plant ◽  
Field Application ◽  
Design Parameters ◽  
Plant Design ◽  
Political Commitment ◽  
Design Constraints ◽  
Technical Requirements ◽  
Set Up

The conventional wastewater (WW) treatment plant includes physical, chemical, and biological treatment processes that can protect the receiving water bodies from water pollution. The common design constraints, challenges as well as environmental impact would make the wastewater treatment plant’s (WWTP) construction and operation more complex and demanding tasks. Major project constraints for WW plant design are economic, accessibility, fulfilling technical requirements, institutional set-up, health and environment, personnel capacity, and political commitment etc. Design methodology adopted in the current study included project location, unit selections, the design capacity, design period as well as proximity to the population and layout plan. The present manuscript discussed briefly about effluent quality requirements, design issues, environmental impacts, details, and safety concerns. It also highlighted the necessary flexibility to carry out satisfactorily within the desired range of influent WW characteristics and flows. In the present study, every step of the design was verified with Environmental Regulations and suggested to overcome all constraints while designing WWTPs so that standard operational code for the specific region could be implemented to achieve the best treatment performance. The results obtained from analytical calculation were optimized to achieve the best design parameters for field application. The optimized values also reduce the construction and operation cost during the field application.

PILOT -SCALE, HIGH-STRENGTH INDUSTRIAL WASTEWATER TREATMENT EVALUATION BY MATHEMATICAL MODELLING

1994 ◽  
Vol 30 (3) ◽  
pp. 119-128
Author(s):  
Elemér Dobolyi ◽  
Imre Takács
Keyword(s):  
Wastewater Treatment ◽  
Treatment Plant ◽  
Pilot Scale ◽  
Full Scale ◽  
Phosphate Removal ◽  
Experimental Results ◽  
Plant Performance ◽  
Design Parameters ◽  
Plant Design ◽  
Effluent Standards

An existing rendering plant wastewater treatment facility has to be upgraded to meet the newly set British and more stringent EC effluent standards. After detailed analysis it turned out, that the existing treatment plant cannot be upgraded, a new plant has to be built. The rendering plant processes slaughterhouse wastes. The wastewater contains easily biodegradable organic substances, mainly organic acids, organic bonded nitrogen and ammonia. According to the new effluent standards the main task, besides the organic removal was the complete removal of nitrogen. The aim of this study was to find out the best available technology and the basic wastewater design data. For this purpose, on site pilot scale experiments were carried out. In several test runs the influent BOD and T K N have varied of between 1400-5500 and 460-1120 mg/l, respectively. Based on the experimental results, single-sludge nitrification-denitrification technology was selected for the full scale treatment plant. The plant was extended by chemical phosphate removal applying the post-precipitation method. In addition to the experimental schedule, a mathematical model of the plant was developed for two purposes.– to verify the applicability of the general activated sludge model under high concentration influent conditions, and– to generalize experimental results and provide a tool to predict plant performance under full scale conditions. On the basis of successful pilot plant experiments and model calibration, full scale plant design parameters were determined and presented. The full scale plant is under construction.

Infiltration Percolation in France: 10 Years Experience

1993 ◽  
Vol 28 (10) ◽  
pp. 73-81 ◽  
Author(s):  
F. Brissaud ◽  
J. Lesavre
Keyword(s):  
Wastewater Treatment ◽  
Theoretical Approach ◽  
Wastewater Treatment Plant ◽  
Pilot Plant ◽  
Wide Spectrum ◽  
Treatment Plant ◽  
Quality Standards ◽  
Plant Design ◽  
Plant Data ◽  
Short Circuits

A survey was carried out during the late '80s over 7 infiltration percolation plants, serving populations ranging between 400 and 1700. With sand depths, hydraulic loads, influent COD and NTK concentrations respectively ranging from 0.6 to 0.2 m, 0.07 to 0.77m/day, 820 to 75 and 70 to 10 mg/l, and with different operating schedules, this set of plants displays a wide spectrum of infiltration percolation in use. When plants are suitably designed, sized and operated, primary effluents oxidation is very effective and current EEC quality standards for wastewater treatment plant effluents are matched. Disinfection is poor, below the level expected from laboratory and pilot plant data. This is due to non-uniform spreading of the influents on the infiltration areas and exceedingly short circuits and short water detention times in the sand beds. Based on a theoretical approach and on data obtained from these and many other plants, a sizing methodology is provided. Recommended improvements in the spreading technology, as well as in the plant design and management, should lead to more reliable oxidation and disinfection performance

Life cycle assessment as a decision support tool in wastewater treatment plant design with renewable energy utilization

2017 ◽  
Vol 93 ◽  
pp. 229-238 ◽  
Author(s):  
Muratcan Başkurt ◽  
Ilgın Kocababuç ◽  
Esra Binici ◽  
Ebru Dulekgurgen ◽  
Özlem Karahan Özgün ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Life Cycle Assessment ◽  
Renewable Energy ◽  
Life Cycle ◽  
Decision Support ◽  
Treatment Plant ◽  
Decision Support Tool ◽  
Energy Utilization ◽  
Plant Design ◽  
Support Tool

scholarly journals Analysis of sewage sludge using an experimental prompt gamma neutron activation analysis (pgnaa) set-up with an am-be source

2016 ◽  
Vol 44 ◽  
pp. 1660215
Author(s):  
Z. Idiri ◽  
F. Redjem ◽  
N. Beloudah
Keyword(s):  
Wastewater Treatment ◽  
Sewage Sludge ◽  
Neutron Flux ◽  
Thermal Neutron ◽  
Wastewater Treatment Plant ◽  
Thermal Neutron Flux ◽  
Detection Efficiency ◽  
Treatment Plant ◽  
Set Up ◽  
Gamma Detection

An experimental PGNAA set-up using a 1 Ci Am–Be source has been developed and used for analysis of bulk sewage sludge samples issued from a wastewater treatment plant situated in an industrial area of Algiers. The sample dimensions were optimized using thermal neutron flux calculations carried out with the MCNP5 Monte Carlo Code. A methodology is then proposed to perform quantitative analysis using the absolute method. For this, average thermal neutron flux inside the sludge samples is deduced using average thermal neutron flux in reference water samples and thermal flux measurements with the aid of a 3He neutron detector. The average absolute gamma detection efficiency is determined using the prompt gammas emitted by chlorine dissolved in a water sample. The gamma detection efficiency is normalized for sludge samples using gamma attenuation factors calculated with the MCNP5 code for water and sludge. Wet and dehydrated sludge samples were analyzed. Nutritive elements (Ca, N, P, K) and heavy metals elements like Cr and Mn were determined. For some elements, the PGNAA values were compared to those obtained using Atomic Absorption Spectroscopy (AAS) and Inductively Coupled Plasma (ICP) methods. Good agreement is observed between the different values. Heavy element concentrations are very high compared to normal values; this is related to the fact that the wastewater treatment plant is treating not only domestic but also industrial wastewater that is probably rejected by industries without removal of pollutant elements. The detection limits for almost all elements of interest are sufficiently low for the method to be well suited for such analysis.

Anaerobic digestion: impact of future greenhouse gases mitigation policies on methane generation and usage

2005 ◽  
Vol 52 (1-2) ◽  
pp. 39-47 ◽  
Author(s):  
P.F. Greenfield ◽  
D.J. Batstone
Keyword(s):  
Nitrous Oxide ◽  
Wastewater Treatment ◽  
Greenhouse Gases ◽  
Greenhouse Gas ◽  
Wastewater Treatment Plants ◽  
Carbon Tax ◽  
Treatment Plant ◽  
Greenhouse Gas Mitigation ◽  
Plant Design ◽  
Ghg Mitigation

The debate as to whether carbon dioxide, methane, nitrous oxide and other greenhouse gas emissions will become subject to increasing regulation, increased restrictions, and probably to some form of carbon tax, has moved from a simple “yes” or “no” to “when”. Wastewater treatment plants will be significantly impacted by increased energy costs and by specific regulations and/or penalties associated with emissions of methane and nitrous oxide. In this paper, the greenhouse gases emissions of different wastewater process options are estimated. The paper outlines the increasing need for wastewater treatment plants to factor greenhouse gas mitigation issues into their medium- as and long-term strategies, and identifies anaerobic enhouse as processes as being at the core of such strategies. Further, the paper identifies a number of key research challenges to be addressed if such strategies are to play a larger role in attenuating the likely impacts of GHG mitigation requirements on wastewater treatment plant design and operation.

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