novosti Archives

The first professional conference in Bosnia and Herzegovina "Water losses in water supply systems"

22/09/2024

by NMAqua with No Comment novosti

At the invitation of the organizer of the company NMAqua Banja Luka participated in the First Professional Conference in Bosnia and Herzegovina "Water loss in water supply systems", which was held on September 19 and 20 in Sarajevo.

According to the organizers, the aim of the Conference is to create an environment in which, first of all, workers of water supply companies (from leak detection workers to company directors) from Bosnia and Herzegovina will have the opportunity to regularly improve their knowledge and exchange experiences in the domain of water loss control ( leak detection, measurement, pressure regulation, zoning, SCADA and remote monitoring, water meter inaccuracy, GIS, digitization, methodologies, technologies, etc.).

The gathering was also an opportunity for participants from private companies to present new technologies and services from this domain and to, in a concrete and direct conversation with representatives of water companies, assess the needs and present their possibilities as part of future cooperation.

At the Conference, it was announced that the "Initiative for the establishment of a financing program for the reduction of losses in water supply systems in Bosnia and Herzegovina", which is through the Sponsor of the conference (Association/association of enterprises/enterprises of the communal economy/economy in the Federation of Bosnia and Herzegovina and the Association "Vodovodi Republika Srpska ") submitted to the State Ministry of Foreign Trade and Economic Relations.

A s an exhibitor at this Conference, the NMAqua team presented its scope of work, offer and opportunities, as well as realized projects during twenty-five years of work experience, through promotional material. During the conference, we had a series of conversations with representatives of water supply companies who expressed interest and the need for cooperation, in order to achieve greater efficiency and good results in reducing non-revenue water in their companies during their activities. We have agreed on a series of activities that we can provide as a service, and we will try to implement this in the coming period as part of project tasks or projects.

Based on the impressions of around 180 participants as well as 15 exhibitors from Bosnia Herzegovina, Serbia, Croatia and Slovenia, the conference met all expectations and was rated as meaningful and useful, and the organizers announced it for the next year in 2025.

Measurement of mixed sewage in Milići

10/08/2024

by NMAqua with No Comment novosti

Based on the Offer of NMAqua d.o.o. and the Contract with the contractor HKP Consulting from Banja Luka, on the measurement of the flow of mixed sewage at one sewage outlet in Milići, "NMAqua" d.o.o. is in the period from 21.06.2024. until July 2, 2024. performed the services defined by the contract in question

After the hydrometeorological conditions were created and in agreement with the customer, we installed and programmed the Hydreka MainFLO flow meter with a doppler speed sensor and a pressure level sensor in a DN 500mm profile pipe in Milići.

After the measurement and analysis, it was concluded that it is a mixed collector, because during two events, a larger amount of water was released, which are related to precipitation in the same period of time.

Participation in the Second International Conference "Water Losses in the Public Water Supply System"

19/06/2024

by NMAqua with No Comment novosti

Second Conference on Water Losses

The Union of Engineers and Technicians of Serbia organized the Second International Scientific Conference on "Water Losses in the Public Water Supply System" in mid-June. The co-organizers of the conference were the Faculty of Civil Engineering of the University of Belgrade, the Institute of Water Management "Jaroslav Čarni", the Engineering Academy of Serbia, and the water supply companies "Vodovod i Kanalizacija" Kragujevac and Novi Sad, under the auspices of the Ministry of Science, Technological Development and Innovation of the Republic of Serbia.

Considering that, like last year, we received an invitation to take part in the work of the Conference, this year we decided to SILVER SPONSOR we present and present part of the activities and achieved results in the field of communal hydrotechnics. Since the main goal of the Conference was the promotion and publication of the results of scientific work, research and professional work, as well as the exchange of experiences and ideas of experts in this field, the company "NMAqua" presented itself with the projects and activities completed so far, with a special emphasis on the development of the AquaWeb software. for reporting, analysis and monitoring, as well as monitoring the state of technical losses in certain zones or on the entire water supply network.

Presentation of the work of NMAqua at the Conference

After the presentation of our activities and the results achieved during more than twenty-five years of work on projects of measurement, analysis and research of losses on water supply systems and reduction of non-revenue water, we made a series of contacts with eminent experts in this field as well as the interest of certain representatives of water companies. We exchanged previous experiences and achieved results achieved in our work, and talked with representatives of several water supply companies that are facing problems and that need the engagement of experts who deal with measurements and reduction of non-revenue water.

After the exchange of information and contacts, we handed our potential future business partners brochures about our company's work, as well as brochures about the AquaWeb program and the services and capabilities of QGIS software.

The Second International Scientific Conference in Belgrade was attended by 110 experts from the Republic of Serbia and abroad, employed at faculties, institutes, public utility companies and companies engaged in the production and distribution of equipment and software, which are intended for detecting losses in the water supply system.

The working part of the Conference was accompanied by an exhibition, in which ten exhibitors took part, companies from the Republic of Serbia and abroad, which are engaged in the production and distribution of equipment and software for detection of losses, among which was our company "NMAqua" Banja Luka.

With positive impressions, we finished our participation in the Second International Scientific Conference in Belgrade and turned to the preparation and participation in the First Professional Conference in Bosnia and Herzegovina "Water Losses in Water Systems", which will be held on September 19 and 20, 2024 in Sarajevo.

https://gubicivodeuvodovodnimsistemima.info/

Detection of water losses on the hydrant network at the sanitary landfill for the Živinice region

10/03/2024

by NMAqua with No Comment novosti

Detekcija gubitaka na hidrantskoj mreži

Na osnovu Ponude NMAqua s.p. kao i Narudžbenice Strabag d.o.o Sarajevo o detekciji gubitaka na hidrantskoj mreži Regionalne sanitarne deponije za regiju Živinice „Separacija 1“, „NMAqua“ s.p. je 02.03.2024. godine izvršila usluge definisane predmetnim ugovorom.

After we received the Technical Report "Project of the derived state of the regional sanitary landfill of municipal waste "Separation 1", as well as the Water Supply Situation - the derived state for the landfill, we prepared and plan for the detection of loss on the hydrant network. On the basis of the submitted documents, it was necessary to perform inspection, control and testing work and to locate the failure points on the hydrant installation in a length of 971 m. On the mentioned network, there are 11 above-ground hydrants with latches with a flange and a head with a telescopic spindle and a street cap, and three hydrants in buildings

Arriving on the field and putting the pump into operation, we found that the pump mode is set by the minimum pressure range of 6.00 bar, when the pump starts, up to a maximum of 7.00 bar when the pump stops.

The complete hydrant network was under operating mode and water pressure, so based on the data from the project, we installed three pressure loggers for easier control and manipulation and separation of individual parts of the network.

All of the above was done in order to more precisely detect the part of the network where there is a problem, i.e. pressure drop. By monitoring the pressure on the control panel in the pumping station, we recorded before the start of any work that the pressure on the hydrant network constantly fluctuates and is in a continuous downward trend. The ratio of the pressure drop was such that the value drop of 0.3 bar occurred in a time interval of about 30 min.

On the basis of these observations, we concluded that it is a defect of very low highlighting intensity and therefore very difficult to identify.

After the results of currently measured pressures on three hydrants, we concluded that it is necessary to first close the valve in the shaft at the fire pump station, i.e. for the part of the hydrant network where there is uncontrolled discharge, which leads to a drop in pressure on the entire network.

We approached listening to a part of the hydrant network with an acoustic sound detector - a geophone, which is spatially located for the most part under a concrete base, as well as a part under a grassy surface.

An isolated high-pitched noise that indicated the existence of a malfunction occurred in the immediate vicinity of the overhead hydrant VH-2. By listening in more detail, we found that the fault is in the area around the mentioned hydrant or directly on it. We closed the pre-valve on the hydrant, which stopped the noise and the pressure drop on the hydrant network.

With this measurement or control, we concluded and confirmed that the defect was located and that it is necessary to repair the hydrant VH-2, i.e. in the underground part at one of the joints at the hydrant.

After the excavation was carried out and the fault was found and repaired, at the junction of the hydrant and the pipeline, the situation normalized, that is, the pressure in the hydrant network stabilized, which, after the technical acceptance, created all the prerequisites for the start of the operation of this very important Regional Garbage Landfill that covers the area of the three municipalities of Živinica, Banovića and Kladnje.

Presentation of the QGIS database of the City of Trebinje

05/01/2024

by NMAqua with No Comment novosti

Pursuant to the Agreement between City of Trebinje and NMAqua Banja Luka, our team created a database in a very short time for the needs of the Department for Communal Inspection Affairs, City of Trebinje, for the use and interpretation of which Free and open-source software (FOOS) was used. Quantum GIS-a (QGIS).

The work was completed on time, although during the work on the creation of the database additional needs arose, that is, the user's requirements were expanded beyond the contracted work, and everything was successfully implemented.

So, after the implementation of the tasks, which included the training of employees in the Department for Communal-Inspection Affairs of the City of Trebinje, the presentation of everything done in the Quantum GIS program was practically carried out.

In the course of implementation, the following services were performed and databases formed:

– Public lighting - about: public lighting poles, lamps, measuring zones, transformer stations, records of electricity consumption, records of money spent on electricity;

- Urbanism - Within the database are: regulatory zones, address register, display of buildings, subdivision plan, cadastral municipalities, database for UT conditions and location conditions;

- Precipitation system - the database contains: drainage grids, drains, storm sewer covers, storm drains;

– Additional databases: balls-planters-ramps, containers, buckets, benches, playgrounds, maintenance of city cleanliness;

- Traffic - the database contains data on: traffic signs, traffic poles, traffic development strategy, lying police officers;

– Greenery: created databases for public green areas, vegetation and maintenance of public areas and vegetation;

- Condominium owners' communities - according to the available data, a database was created containing the locations of ZEVs with associated data, a database of ZEV tenants was created;

- Communal fees and charges - a database was created on the locations of issued communal fee solutions, communal fee solutions;

- Tenants - a database of tenants was created;

- Auxiliary layers - data about settlements, local communities and roads in the area of the City of Trebinje loaded into the database.

In addition to all department heads and their assistants in the city administration, the mayor of the city of Trebinje, Mr. Mirko Ćurić, attended the presentation of the completed part of the work "Formation of databases" in QGIS.

Speaking after the presentation, Mr. Ćurić pointed out that, looking at the presentation, this program, which is also free, will provide long-term work relief to all employees of the city administration. "It is necessary for the city administration to be seen and function as a single body, and this can be done precisely by connecting the databases as presented by the expert team "NMAqua" from Banja Luka, as well as the employees of our department, who have invested a huge effort and energy to get such an excellent result and the possibility of easier, more precise and timely action", said Mayor Ćurić. He also emphasized that "the work is not finished yet, because the participation of other departments and the continuation of cooperation in a work that is significantly more worthwhile" is expected, and that he hopes that after the complete implementation of the program, in addition to the City of Trebinje, other local communities will understand the importance and need for realization of the same.

Our team will continue part of the work started in the Department for Communal-Inspection Affairs, City of Trebinje, during 2024, with the announcement of the need to expand the work for other departments of the city administration.

Pipeline inspection on the A1 Sarajevo-Mostar highway

14/12/2023

by NMAqua with No Comment novosti

FIRE WATER NETWORK LOSS INVESTIGATION

According to the contract on business and technical cooperation between NMAqua sp Banja Luka and Hydra d.o.o Sarajevo, during November, a fault test was performed on the water supply network for fire protection. After the determined loss of the pipeline for fire protection on the section of the highway A1 Sarajevo - Mostar, we were hired by our business partners to carry out an inspection, inspection and try to find the problem.

It was about a section of the 110mm pipeline with a length of about 600m, where it was determined that there was a loss by manipulating the sector closures. For this work, it was necessary for us to have an ultrasonic flow meter and an acoustic sound detector - a geophone.

After we let water into the pipeline, which was closed, through the reduction valve, we got a pressure that was satisfactory for working with the geophone. We were informed by colleagues who had done preliminary preparation in terms of determining the part of the pipeline where there is a large loss, that by releasing that part of the network, the tank empties very quickly.

Because of all the above, it was important for us to carry out the inspection and investigation of losses as soon as possible.

In order to get the most accurate picture of the situation and narrow the circle to the shortest possible distance, we first measured the flow with an ultrasonic flow meter at several measuring points along the mentioned section of 600 mm.

When we determined the approximate location of a possible uncontrolled discharge, because we received information on the flow meter about the size of the discharge of about 18.00 m³/h, we listened to that part of the pipeline.

The specificity was that a good part of the section for which we assumed that there was a pipeline protrusion was under the viaduct, past which the road for one part of the settlement passed. By controlling the noise on the pipeline with an acoustic detector, we found a very weak noise and a small vibration on the bridge in a length of about ten meters.

Given the location of the failure, it was clear that a visual inspection of the pipe, which was placed on the supports for the structure on the underside of the bridge, had to be carried out, because the outflow of water would have to be visible.

Through visual inspection, we determined during the tour that it was a protrusion from the 50 mm profile pipe, which served as a winter outlet for the discharge of the hydrant fire protection pipeline. There was a 2" valve ball rupture at the end of the pipe and therefore an uncontrolled discharge, which was difficult to see from a greater distance due to its position next to the concrete pillar of the bridge.

Given the circumstances that we had to react quickly due to time constraints and emptying the tank, we had another very successfully completed job behind us.

Implementation of the QGIS program in the Department for Communal Inspection Affairs of the City of Trebinje

11/12/2023

by NMAqua with No Comment novosti

Creating a database using the QGIS tool

According to the terms specified in the Terms of Reference in the Agreement between City of Trebinje and NMAqua Banja Luka, our developer was obliged to create a database for the needs of the Department for Communal Inspection Affairs, City of Trebinje, for the use and interpretation of which the use is planned Quantum GIS-a (QGIS).

Therefore, the Department for Communal-Inspection Affairs of the City of Trebinje needed a tool that would enable more functional data storage, insight into the existing state of the infrastructure, as well as an overview of the future needs of the city.

The NMAqua Team has made efforts to provide them with a functional solution that will manage data on:

City and suburban roads and traffic signals
Public lighting
Rainfall system and maintenance of public areas
Urban greenery (parks, tree rows, green areas)
Playgrounds under the jurisdiction of the city
City infrastructure furniture (benches, waste bins; concrete balls, planters, ramps)
Homeowner communities
Address register of the city
Solutions of urban-technical conditions and locational conditions
Decisions on communal fees
Decisions on communal fees.

Digitization of available data

As the basis for work in QGIS, the developer used Google satellite bases, as well as rasterized representations of submitted dwg drawings from his own production, and pdf sketches that are available within the submitted study and strategy.

From the available documentation, the NMAqua Team started digitizing the available data, processing and migrating it to the database on the PostgreSQL server of the City Administration of the City of Trebinje, with database constructions and data table schemes for each individually listed area under the jurisdiction of the Department for Communal Inspection Affairs.

QGIS connection to PostgreSQL server

The database in question was initially created on a local computer within the QGIS environment, after which the developer installed PostgreSQL on the computer within the Department for Municipal Inspection Affairs.

Database migration to the PostgreSQL database was performed using the PG Admin 4 program, which is used to manage the PostgreSQL server

Inside the PostgreSQL server, accounts and passwords are created for the various operators and users of the database, with the primary goal of limiting accidental data loss when viewed by multiple users.

The person designated as the database administrator has all the authorizations to work within it (data reading, correction, addition and deletion).

Other accounts have restrictions on working in the database, according to their work roles, data hierarchy.

In all tables, data storage on data entry and correction within the database is included.

In addition to the already mentioned works on the PostgreSQL base, the developer and the NMAqua team prepared projects intended for work in the Android application QField, which is an addition to the QGIS application on Android operating systems. The mentioned application is intended for field work, checks and data collection. QField projects were created for the "Lighting", "Traffic" and "Precipitation" schemes, and were delivered to end users for further work.

Routing of underground electrical and telephone cables

14/11/2023

by NMAqua with No Comment novosti

RECONSTRUCTION OF THE SEWAGE NETWORK

For the purposes of realizing the sewer network reconstruction project in Gradiška, which is managed by KP "Vodovod" a.d. In Gradiška, we conducted a survey of underground installations at 22 locations.

We performed research and detection of underground electrical and telecommunication installations on the part of the road from Nova Topola to Aleksandrovac, as well as in the branch towards the settlement Romanovci, Mashici, Vilusi, and Krajisnik and Troselji.

The positions of the mentioned underground installation were identified, registered with geomap positions, and photographed.

All positions where exploratory wells for sewage pumping stations will be drilled in the coming period have been checked.

The research of the underground installation in this part was performed in a total length of about 3 km

Conceptual solution for rehabilitation, reconstruction and development of the water supply system Gacko

11/09/2023

by NMAqua with No Comment novosti

SOLUTION OF WATER SUPPLY OF GACKO MUNICIPALITY

The Municipality of Gacko, in order to solve the water supply of the population of this municipality, has announced a tender for the "Ideological solution for rehabilitation, reconstruction and development of the Gacko water supply system".

For the purposes of this project, we were engaged by the contractor "CPK" Banja Luka with the project task "Flow measurement with portable ultrasonic flow meters and pressure measurement with digital portable loggers on pipelines managed by JP "Vodovod" a.d. Gacko"

Therefore, it was necessary to measure the balance, that is, the amount of water on the water supply system managed by "Vodovod" a.d. Gacko, and the total length of the distribution network is about 70 mi.

Preparation for measurement

Flow measurement from the reservoar

Setting the parameters for measurement

The first phase of this project related to the measurement of the capacity of the spring "Vratlo" from which the municipality of Gacko is supplied, and the incoming and outgoing volumes of water at all reservoirs.

The distribution network in the city part of Gacko is organized into two supply zones: a higher zone that is supplied from the Gacko 2 reservoir and a lower zone that is supplied from the Gacko 1 reservoir. In addition to these two reservoirs, measurements were also made in the Samobor, Kula and Stepen reservoirs.

In this measurement phase, it was necessary to measure the flow of water at the entrances to the tanks and the water leaving the tanks, as well as the pressures on the water supply network. Flow and pressure measurements were carried out for each specified measuring point 24 hours continuously, rounding the measurement units and including them so that the results can be used for the calculation of water balances and the creation of a mathematical model of the water supply system with hydraulic supply calculation.

In addition, for this phase of the works, it was necessary to perform measurements with mobile ultrasonic flow meters at consumers, namely:

- individual housing in the city area,
- individual housing rural area,
- collective housing - buildings (newer and older constructions),
- public institutions,
- big economy companies,
- small economy companies

The flow measurement was carried out during this phase of the project at 38 measuring points with six ultrasonic flow meters, and pressure measurement with digital loggers at 10 measuring points.

The work on measuring the flow and pressure, with the preparation of the measuring points, lasted continuously for eleven days. For each measurement point, the measurement cycle lasted 24 hours, with the default measurement interval for both measurement parameters being 1 minute.

The measurement was carried out in extremely difficult conditions, because during this work there were partial reductions in the water supply system. With the understanding of the management of KP "Vodovod" Gacko, we adjusted the reductions, in order to have conditions for measuring rounded hydraulic units.

For this measurement phase, we also had great, selfless help from the employees of KP "Vodovod" a.d. Gacko. In addition to helping us get acquainted with the water supply network and the functioning of the water supply system, they also provided us with the necessary technical assistance.

With their help our NMAqua team fully fulfilled all requirements from the project assignment.

The second phase of the project in the coming period foresees additional measurements on the water supply system, i.e. pipelines, where mathematical calculations show the existence of differences, i.e. losses. It will also be necessary to carry out testing and detection of losses on certain parts of the water supply system and finally final measurements after all analyzes and reduction of losses on the water supply network of the municipality of Gacko.

Locating the water leak in the factory in Teslić

30/05/2023

by NMAqua with No Comment novosti

Inspection and control of the water supply network

Problem velikog gubitka na vodovodnoj mreži se pojavio u firmi “Eurometal”iz Teslića pri čemu smo kontaktirani da izvršimo pregled mreže i ustanovima mjesto puknuća. Izvršili smo prethodno vizuelni pregled i obilazak kruga fabrike, a s obziorm da nije postojala nikakva katastarska podloga sa ucrtanim položajem cjevovoda, bilo je potrebno isto istražiti. Takođe na osnovu dostupnih informacije koje su bile nepotpune bilo je potrebno sagledati i izvršiti provjeru za sve objekte, jer je od prvobitnog stanja fabričkog kruga izvršena podjela na dva odvojena privredna subjekta, sa samostalnim priključcima na vodovodnu mrežu.

After the preparations and assessment of the scope of work, the routing of pipelines was carried out with the checking of power supply arms for business facilities, i.e. production halls. Having determined the position of the pipeline, an inspection of the internal sanitary and hydrant installation was carried out. The outer ring of the hydrant network around the facilities around the factory was also inspected, and listening to the network revealed an approximate section on the outer hydrant part, where there was a suspicion of failure.

Testing and leakage location

Using the correlation method, the area where the defect was located based on the results of measurements and tests was reduced. A more detailed detection revealed noise on the water supply network of very low intensity, due to the very configuration of the terrain and soil, which is gravelly and absorbs sounds, as well as the material of the PVC pipe on which the failure occurred. After the fault was located, the pipeline was dug up and the fault removed.

According to the results of the water meter readings, the average consumption of this business entity in the period before the failure occurred was about 4.6 m3³With the occurrence of the malfunction, and based on the reading of the water meter, the consumption increased many times and on a daily basis in 24 hours it amounted to about 83.3 m³.

By repairing the defect, the daily consumption returned to the normal level of about 3.5 m³.

NMAqua

Posts in category: novosti

The first professional conference in Bosnia and Herzegovina "Water losses in water supply systems"

Measurement of mixed sewage in Milići

Participation in the Second International Conference "Water Losses in the Public Water Supply System"

Second Conference on Water Losses

Presentation of the work of NMAqua at the Conference

Detection of water losses on the hydrant network at the sanitary landfill for the Živinice region

Detekcija gubitaka na hidrantskoj mreži

Presentation of the QGIS database of the City of Trebinje

Pipeline inspection on the A1 Sarajevo-Mostar highway

FIRE WATER NETWORK LOSS INVESTIGATION

Implementation of the QGIS program in the Department for Communal Inspection Affairs of the City of Trebinje

Creating a database using the QGIS tool

Digitization of available data

Routing of underground electrical and telephone cables

RECONSTRUCTION OF THE SEWAGE NETWORK

Conceptual solution for rehabilitation, reconstruction and development of the water supply system Gacko

SOLUTION OF WATER SUPPLY OF GACKO MUNICIPALITY

Locating the water leak in the factory in Teslić

Inspection and control of the water supply network

Testing and leakage location

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