scholarly journals Megacity Wastewater Poured into A Nearby Basin: Looking for Sustainable Scenarios in A Case Study

Water ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 824
Author(s):  
Silvia Chamizo-Checa ◽  
Elena Otazo-Sánchez ◽  
Alberto Gordillo-Martínez ◽  
Juan Suárez-Sánchez ◽  
César González-Ramírez ◽  
...  
Keyword(s):  
Water Balance ◽  
Treatment Plant ◽  
Sprinkler Irrigation ◽  
Planning System ◽  
Demand And Supply ◽  
Water Demand And Supply ◽  
Untreated Sewage ◽  
Hydric Stress ◽  
Agriculture Irrigation

Megacity sewage creates socioeconomic dependence related to water availability in nearby areas, especially in countries with hydric stress. The present article studies the past, current, and future water balance progression of realistic scenarios from 2005 to 2050 in the Mezquital Valley, the receptor of Mexico City untreated sewage since 1886, allowing for agriculture irrigation under unsustainable conditions. The Water Evaluation and Planning System (WEAP) was used to estimate water demand and supply, and validation was performed by comparing results with outflow data from the Tula River. Simulated scenarios were (1st) steady-state based on inertial growth rates (2nd) transient scenario concerning the influence of forecasted climate change perturbations in surface water and hydric stress for 2050; and (3rd) the previous scenario appending scheduled actions, such as 36% reduction in imported wastewater and the startup of a massive Wastewater Treatment Plant, allowing for drip and sprinkler irrigation from the year 2030. The main results are as follows: (a) in the period 2005–2017, 59% of the agriculture depended on flood irrigation with megacity sewage; (b) the outcomes of water balance scenarios up to 2050 are presented, with disaggregated sectorial supply of ground and superficial water; (c) drip irrigation would reduce agriculture demands by 42% but still does not guarantee the downflow hydroelectric requirements, aggravated by the lack of wastewater supply from 2030. This research highlights how present policies compromise future Valley demands.

scholarly journals Megacity Wastewater Poured into a Nearby Basin: Looking for Sustainable Scenarios in a Case Study

2020 ◽  
Author(s):  
Silvia Chamizo-Checa ◽  
Elena M. Otazo-Sanchez ◽  
Alberto J. Gordillo-Martinez ◽  
Juan Suarez-Sanchez ◽  
Cesar A. Gonzalez-Ramirez ◽  
...  
Keyword(s):  
Water Balance ◽  
Treatment Plant ◽  
Sprinkler Irrigation ◽  
Water Treatment Plant ◽  
Weap Model ◽  
Water Demand And Supply ◽  
Untreated Sewage ◽  
Start Up ◽  
Water Drip ◽  
Hydric Stress

The megacities´ sewage creates socioeconomic dependence related to water availability in the nearby zones, especially in countries with hydric stress. The present paper studies the water balance progression of realistic scenarios from 2005 to 2050 in the Mezquital Valley, the receptor of Mexico City untreated sewage since 1886, allowing agriculture irrigation in unsustainable conditions. WEAP model calculated the water demand and supply. Validation was performed with outflows data of the Tula River and simulated three scenarios: 1st) Steady-state based on inertial growth rates, 2nd) Transient scenario concerned climate change outcomes, with minor influence in surface water and hydric stress in 2050; 3rd) Transient scenario perturbed with a planned reduction of 36% in the imported wastewater and the start-up of a massive Water Treatment Plant, allowing drip and sprinkler irrigation since 2030. In the 2005-2017 period, 59% of the agriculture depended on the flood irrigation with megacity sewage. The water balance scenarios evaluated the sectorial supply of the ground and superficial water. Drip irrigation would reduce 42% of agriculture demands, but still does not grant the downflow hydroelectric requirements, aggravated by the lack of wastewater supply since 2030. This research alerts about how present policies compromise future Valley demands.

A Water Balance Analysis for Assessing Water Demand and Supply in Administrative Districts

2016 ◽  
Vol 12 (4) ◽  
pp. 153-166 ◽  
Author(s):  
Hyung San Kim ◽  
◽  
Seung Jin Maeng ◽  
Kyeong Soo Jeon ◽  
Dong Joo Kim ◽  
...  
Keyword(s):  
Water Balance ◽  
Water Demand ◽  
Demand And Supply ◽  
Water Demand And Supply ◽  
Balance Analysis

scholarly journals Current and Future Potable Water Demand and Supply at the Federal University of Technology, Akure, Nigeria

2021 ◽  
Vol 6 (3) ◽  
Author(s):  
Samuel B Akeju ◽  
Ochuko M Ojo ◽  
James R Adewumi
Keyword(s):  
Water Demand ◽  
Potable Water ◽  
Treatment Plant ◽  
Demand And Supply ◽  
Water Demands ◽  
University Of Technology ◽  
Water Demand And Supply ◽  
Daily Water ◽  
The University ◽  
University Community

This study is aimed at assessing current and future potable water demand and supply at the Federal University of Technology, Akure (FUTA), Nigeria. The only source of water to the University community is ground water extracted through boreholes constructed at different locations in the University. Eighteen (18) storage and distribution reservoirs were assessed to assess their capacity to adequately supply water for the present and future population of students and staff within the institution. FUTA had a population of 28,419 in 2019, the staff made up 9.16% of the total population while the students constituted the remaining 90.84%. A 30-year population projection was made for both staff and students using the geometric increase method of population forecasting. The study revealed that the population of FUTA will grow to 62,280 persons in 2049 from 28,419 in 2019 assuming a constant growth rate of 2.65% while the current average daily water demand of the University community is 1,475.83 m3/day. The current yield of water from the boreholes in FUTA is 1,198.07 m3/day which is not sufficient to meet the daily water demands of the University community. The maximum possible yield from the boreholes is 2,443.68 m3/day under normal conditions involving stable power supply and adequate personnel. Furthermore, it is projected that by the year 2049, the average daily water demand of the University community would be 2,995.74 m3/day. The outcome of this study revealed that there is water shortage in FUTA and the situation would worsen as the years go by if adequate measures are not put in place. The construction of a dam and water treatment plant is recommended to meet the increasing water demands occasioned by increase in population .Keywords – Potable, water, demand, supply, boreholes

Side effects of cultured bacteria addition in wastewater collection system on plant operations – a case study

2012 ◽  
Vol 7 (1) ◽  
Author(s):  
Yanjin Liu ◽  
Giraldo Eugenio
Keyword(s):  
Energy Use ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Collection System ◽  
Oil And Grease ◽  
Odor Control ◽  
Plant Operations ◽  
Cultured Bacteria ◽  
Wastewater Collection

Cultured bacteria addition is one of the technologies used for odor control and FOG (fat, oil, and grease) removal in wastewater collection systems. This study investigated the efficiency of bacterial addition on wastewater odor control by conducting a set of full scale trials in a 60,000 cubic meter per day system for a period of two years. The objectives of this study were: (i) to identify factors that could impact wastewater treatment plant (WWTP) operations due to the effect of bacterial addition in the collection system, (ii) to estimate/understand the level of those impacts, and (iii) to present some interesting findings from the completed case study. The plant operation data before and during the bacterial addition were reviewed. The application of the cultured bacteria presented in the study was found to have significant impacts on the operation of the WWTP in terms of influent biological oxygen demand (BOD) and total suspended solids (TSS) loading, primary settling, sludge production, energy use, dissolved sulfides concentration, and methane production.

Reuse of Wastewaters in Agriculture by Means of Sprinkler Irrigation on a Farmland Area of 3000 ha – Large Scale Experience in Germany

1986 ◽  
Vol 18 (9) ◽  
pp. 163-173
Author(s):  
R. Boll ◽  
R. Kayser
Keyword(s):  
Large Scale ◽  
Treatment Process ◽  
Treatment Plant ◽  
Sprinkler Irrigation ◽  
Paper Briefly ◽  
Treatment Results ◽  
Sewage Farm ◽  
Western Germany ◽  
Pre Treatment ◽  
Main Components

The Braunschweig wastewater land treatment system as the largest in Western Germany serves a population of about 270.000 and has an annual flow of around 22 Mio m3. The whole treatment process consists of three main components : a pre-treatment plant as an activated sludge process, a sprinkler irrigation area of 3.000 ha of farmland and an old sewage farm of 200 ha with surface flooding. This paper briefly summarizes the experiences with management and operation of the system, the treatment results with reference to environmental impact, development of agriculture and some financial aspects.

Urease as a Possible Tracer for Sewage Effluent Plumes

1989 ◽  
Vol 21 (2) ◽  
pp. 93-97 ◽  
Author(s):  
R. Sadler
Keyword(s):  
Urease Activity ◽  
Simple Procedure ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Particulate Phase ◽  
Untreated Sewage ◽  
Potential Alternative ◽  
Two Parameters ◽  
Point Source Discharges

The suitability of sedimentary urease activity as a potential tracer for sewage outfall plumes has been examined. Enzyme activity is readily measured in the sediments by a relatively simple procedure and results may be obtained within a few hours of sampling. The results of urease measurements in areas around point source discharges were compared with bacteriological data for the same areas. Three areas were selected for study: a discharge of untreated sewage into a harbour, a discharge from a sewage treatment plant to a river and a discharge from a contaminated drain to a small beach. In all cases, positive correlation between the distribution of the two parameters was observed. Urease activity probably reflects the movement of soluble products from the outfall whereas E.coli represents the particulate phase of the discharge. Although further work will be required, urease activity does offer a potential alternative to E.coli for tracing plumes of faecal pollution.

The Implementation of Biological Phosphorus and Nitrogen Removal with the Bio-Denipho Process on a 265,000 PE Treatment Plant

1992 ◽  
Vol 25 (4-5) ◽  
pp. 161-168 ◽  
Author(s):  
J. Einfeldt
Keyword(s):  
Nitrogen Removal ◽  
Treatment Plant ◽  
First Year ◽  
In Series ◽  
Design Loads ◽  
Last Stage ◽  
Two Stages ◽  
The City ◽  
Biological Phosphorus

A process, called Bio-Denipho, for combined biological phosphorus and nitrogen removal in a combination of an anaerobic tank and two oxidation ditches is described. In this process the anaerobic tank consisting of three sections working in series is followed by two oxidation ditches. These too are working in series, but with both inlet to and outlet from the tanks changing in a cycle. The Bio-Denipho process is described specifically for the process itself and as a case study for the implementation of the process on a 265,000 pe wastewater treatment plant for the city of Aalborg in Denmark. The plant was designed and erected in two stages and the last stage was inaugurated October 31,1989. Lay-out and functions for the plant is described and design loads, plan lay-out and tank volumes are given in this paper together with performance data for the first year in operation.

scholarly journals Characterisation and Life Cycle Assessment of Pervious Concrete with Recycled Concrete Aggregates

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 209
Author(s):  
Adilson C. Paula Junior ◽  
Cláudia Jacinto ◽  
Thaís M. Oliveira ◽  
Antonio E. Polisseni ◽  
Fabio M. Brum ◽  
...  
Keyword(s):  
Environmental Performance ◽  
Treatment Plant ◽  
Recycled Concrete ◽  
Pervious Concrete ◽  
Recycled Aggregate ◽  
Recycled Aggregates ◽  
Positive Contribution ◽  
Concrete Aggregates ◽  
Recycled Concrete Aggregates

The search for environmental preservation and conservation of natural resources gives rise to new concepts and viable technical solutions on the path to sustainable development. In this context, this study’s main objective is to analyse the influence of recycled concrete aggregates (RCAs) on the development of pervious concrete, whose use as a floor covering represents an excellent device to mitigate the urban soil sealing phenomena. For this, mechanical and hydraulic tests were carried out, in addition to microstructural analyses and the assessment of its environmental performance. The results obtained were compared to reference studies also involving the incorporation of recycled aggregates. A pilot-scale case study was conducted, involving a parking space lined with pervious concrete moulded “in situ”. In laboratory tests, permeability coefficients and mechanical strengths compatible with the literature and above the normative limit for light traffic were found. The case study demonstrated higher permeability than in the laboratory, but the flexural strength was lower, being indicated only for pedestrian traffic. The environmental assessment showed that the RCA represents a positive contribution to the environmental performance of pervious concrete. Still, attention should be given to the recycled aggregate transport distance between the concrete plant and the RCA treatment plant.

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