AUTHORISED SOLENIS DISTRIBUTOR FOR SLOVENIA AND CROATIA

Advanced water technologies for industry

From raw-water analysis to a stable industrial process: chemicals, equipment, engineering, implementation, supervision and long-term technical support from one source.

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✓ Reliability✓ Innovation✓ Industrial grade
SolenisAZUDSonoxide

ABOUT NTI

A reliable water-treatment partner

NTI d.o.o. is an engineering company based in Žalec. Since 2010, we have delivered complete water preparation and treatment solutions for industry and power generation. We design process-cooling and production-water systems.

Our key advantage is that we are not merely a chemical distributor. We combine chemistry, equipment and process knowledge into one functional solution. During regular monthly visits, we analyse water, inspect the complete system and recommend improvements that support production reliability.

  • ✓ More than 15 years of industrial experience
  • ✓ Authorised Solenis distributor for Slovenia and Croatia
  • ✓ AZUD distributor for Slovenia and Croatia
  • ✓ Pioneer in the industrial use of disc filtration in both markets
  • ✓ 10/10 credit rating
  • ✓ Complete turnkey solutions
  • ✓ Coverage across South-East Europe

Precision

Every solution is tailored to the system, process and required water quality.

Engineering approach

We do not simply supply a product. We design, commission, monitor and optimise the complete system.

Long-term partnership

Regular visits and analyses let us track performance and recommend improvements in time.

15+years of experience
SI + HRregional operations
EUmanufactured equipment
10/10credit rating

WHAT WE OPTIMISE

Water should support production — not stop it

Effective water treatment is about more than water quality. It protects equipment, heat transfer, process continuity, operating cost and plant safety.

01

Corrosion

Protection programs tailored to system metallurgy, operating temperatures and actual process conditions.

02

Scale and deposits

Control of hardness, minerals and suspended solids to preserve flow and efficient heat transfer.

03

Microbiology and biofilm

Chemical and non-chemical technologies for microbiological control and cleaner system operation.

04

Water and energy use

Operating-parameter optimisation for better use of water, chemicals and energy without compromising the process.

05

Equipment reliability

Correct water preparation and regular supervision help extend equipment life and reduce the risk of unplanned downtime.

06

Performance control

Sampling, analysis and expert site visits turn plant data into clear recommendations for the next step.

KEY APPLICATIONS

The complete industrial water cycle under one control strategy

Incoming-water quality determines the performance of every downstream process. We therefore treat water management as an interconnected system from the source through production to discharge or reuse, rather than as an isolated chemical or item of equipment.

01

Incoming water

Source analysis, mechanical filtration and quality stabilisation before further treatment.

02

Process quality

Softening, membrane processes and demineralisation matched to production requirements.

03

Utility circuits

Protection of boiler, steam, cooling, heating and closed-loop systems.

04

Discharge or reuse

Wastewater treatment, load reduction and preparation for safe return to the process where feasible.

Modern industrial boiler and steam-water system
01

Boiler water and steam systems

At elevated temperature and pressure, even small water-quality deviations can cause deposits, corrosion, foaming, steam contamination and increased energy losses.

Key challenges
  • Scale and impaired heat transfer
  • Oxygen and corrosion
  • Foaming and carryover
  • Blowdown losses
NTI approach

We match the program to feedwater quality, pressure and condensate return: filtration and softening, reverse osmosis or EDI where required, dissolved-oxygen control, pH and alkalinity control, deposit dispersion, controlled dosing and blowdown optimisation.

Open industrial cooling-water system with cooling towers
02

Cooling systems and towers

In an open cooling system, pure water evaporates while dissolved salts remain and progressively concentrate. Without control of concentration cycles, blowdown and chemical balance, heat-transfer efficiency declines.

Key challenges
  • Scale and deposits on heat exchangers
  • Corrosion across mixed metallurgy
  • Biofilm and microbiological growth
  • Airborne suspended contamination
NTI approach

We combine makeup-water preparation, corrosion and scale inhibition, targeted biocide treatment or Sonoxide, AZUD side-stream filtration, conductivity-controlled blowdown, precise dosing and regular analysis. We supply, service and optimise cooling towers.

Closed industrial heating and cooling loop
03

Closed heating and cooling loops

A closed circuit is not a risk-free circuit. Oxygen ingress, unsuitable pH, mixed metallurgy, glycol and suspended corrosion products can gradually impair hydraulics and heat transfer.

Key challenges
  • Oxygen and corrosion products
  • Unstable pH and mixed metals
  • Magnetite, sludge and blockage
  • Glycol degradation and microbiology
NTI approach

We verify water chemistry and system materials, clean and passivate the circuit where required, apply suitable inhibitors, side-stream filtration and glycol control, then regularly monitor pH, conductivity, iron and microbiological condition.

Industrial reverse-osmosis and demineralisation plant
04

Pretreatment and demineralisation

Variable well, surface or mains-water quality must be stabilised before sensitive equipment and processes to prevent downtime and premature membrane fouling.

Key challenges
  • Changes in turbidity and composition
  • Filter and membrane blockage
  • Mineral and biological fouling
  • Unstable conductivity and hardness
NTI approach

Following chemical and microbiological analysis, we define the treatment train: disc, mechanical, multimedia or activated-carbon filtration, softening and ion exchange, reverse osmosis, electrodeionisation, UV where appropriate, antiscalant dosing and key-parameter instrumentation.

Industrial wastewater-treatment plant
05

Industrial wastewater

Wastewater composition changes with the process, raw materials and production regime. Treatment must therefore reflect the actual load, discharge target and opportunities for reuse.

Key challenges
  • Variable pH and chemical load
  • Suspended solids and turbidity
  • Oils, emulsions and metals
  • Sludge volume and handling
NTI approach

Based on laboratory and process analysis, we combine pH adjustment, coagulation and flocculation, separation, filtration and sludge dewatering. The objective is stable performance, lower chemical use and reliable compliance with defined discharge limits.

Industrial foam-control and antifoam-dosing system
06

Foam control and antifoams

Foam forms when surfactants, proteins, oils or organic loading stabilise air bubbles. In process water and industrial wastewater, it can reduce usable volume, cause overflow and disrupt process stability.

Key challenges
  • Lost capacity and overflow
  • Impaired separation and oxygen transfer
  • Unstable measurement and dosing
  • Foam carryover into downstream stages
NTI approach

We first identify the source and character of the foam, then use laboratory or plant trials to select a compatible antifoam and the lowest effective dose. We define the dosing point and control method, then verify performance so that foam is reduced without harming filtration, membranes, biological treatment or product quality.

SYSTEM DEEP DIVE

From water chemistry to stable plant operation

A good solution does not end with the delivery of equipment or chemicals. We connect water parameters, equipment behaviour and process performance in a program that can be measured, supervised and continuously improved.

01
EVAPORATION · CYCLES · BLOWDOWN

Open cooling systems

The objective is not to maximise cycles of concentration at any cost, but to find a safe balance between water use, chemical consumption and asset protection. The program is based on makeup-water analysis, heat load, metallurgy, temperature and airborne contamination.

  • Conductivity-controlled automatic blowdown
  • Scale, deposit and corrosion inhibition
  • Microbiological control and biofilm prevention
  • Side-stream removal of suspended solids
02
FEEDWATER · STEAM · CONDENSATE

Boiler houses and steam systems

Steam quality and energy efficiency depend on the complete cycle — from incoming water and deaeration to the boiler, steam distribution and condensate return. We tailor the program to operating pressure, construction and the way steam is used.

  • Pretreatment, softening, RO and EDI
  • Control of pH, alkalinity and dissolved oxygen
  • Protection of steam and condensate lines
  • Blowdown, foaming and carryover control
03
MEASUREMENT · DOSING · TRENDS

Automation and supervision

A reliable program must respond to real changes in the plant. We turn measurements into control signals and operating data into clear recommendations for operators, maintenance and production teams.

  • pH, conductivity, ORP and temperature measurement
  • Flow-paced dosing and automatic blowdown
  • Alarms, trends and chemical-consumption checks
  • Sampling, laboratory analysis and service reports

OUR SERVICES

Complete water-treatment solutions

From leading chemical programs to advanced process equipment — an integrated solution for safer operation, stable water quality and lower total cost of system management.

03

AZUD disc filters

AZUD disc-filter distributor for Slovenia and Croatia and a pioneer in the industrial use of disc filtration in both markets. Reliable filtration for industrial, irrigation and demanding process applications.

SI and HR distributionDisc filtrationIrrigationProcess water
04

Water-preparation equipment

Water-preparation equipment manufactured in the EU: softeners, reverse osmosis, electrodeionisation, filtration and dosing.

Reverse osmosisSoftenersElectrodeionisationDosing equipment
05

Cooling towers and components

Cooling towers and cooling-tower components manufactured in the EU.

Tower supplyTower componentsTemperature controlEnergy efficiency
06

Design, service and monitoring

We design cooling and process-water systems, providing implementation, commissioning, regular visits, analytics and continuous optimisation.

System designMonthly visitsAnalytics and controlTurnkey solutions

TECHNOLOGY PORTFOLIO

Equipment and processes integrated into one treatment train

There is no universal unit for every water source. We select the treatment sequence from the analysis, required flow, target quality, available space and total life-cycle cost.

01

Mechanical and depth filtration

Equipment protection and turbidity stabilisation before sensitive process stages.

  • AZUD disc and screen filters
  • Filter cartridges and housings
  • Multimedia and sand filters
  • Cooling-loop side-stream filtration
02

Targeted raw-water treatment

Removal of parameters that interfere with the process or shorten equipment life.

  • Activated carbon
  • Iron and manganese removal
  • SIMPLEX / DUPLEX softening
  • Dealkalisation and ion exchange
03

Membrane treatment and demineralisation

Controlled process and feedwater quality for demanding applications.

  • Reverse osmosis
  • Ultrafiltration and nanofiltration where required
  • Demineralisers
  • Electrodeionisation (EDI)
04

Chemical programs

System protection matched to water chemistry, metallurgy and operating regime.

  • Corrosion and scale inhibitors
  • Dispersants and antiscalants
  • Boiler and cooling-water programs
  • Coagulants and flocculants
  • Antifoams and foam control
05

Disinfection and microbiology

Microbiological control with process safety and targeted product consumption.

  • Solenis biocide programs
  • Sonoxide ultrasonic technology
  • UV disinfection where appropriate
  • Biofilm and Legionella control
06

Dosing, measurement and service

Equipment and expert support that keep the program stable over time.

  • Dosing stations and pumps
  • pH, conductivity and ORP controllers
  • Commissioning and training
  • Regular site visits and optimisation

INTEGRATED SOLUTION EXAMPLES

Multiple technologies, one accountable partner

These are not off-the-shelf packages or claims about individual customer references. Every solution is sized from water analysis, process conditions and plant objectives, with NTI responsible for integrating the technologies into one working system.

01

Open cooling-water system

System challenge

Scale, corrosion, biofilm and airborne solids impair heat transfer and increase water consumption.

Integrated NTI solution

A Solenis chemical program, AZUD side-stream filtration, a cooling tower or service package, plus NTI dosing, analytics and continuous supervision.

SolenisAZUDCooling towers
02

Boiler house and steam generation

System challenge

Hardness, dissolved oxygen, deposits and condensate contamination put steam-system efficiency and reliability at risk.

Integrated NTI solution

EU-manufactured water-preparation equipment for softening, reverse osmosis or EDI, Solenis boiler and condensate conditioning, plus NTI controls and performance verification.

Water-preparation equipmentSolenis
03

Process water and water reuse

System challenge

Variable turbidity, dissolved substances and reuse targets require a stable sequence of pretreatment and final purification.

Integrated NTI solution

AZUD filtration, EU-manufactured membrane water-preparation equipment, Solenis chemical optimisation where required, plus NTI engineering, integration and commissioning.

AZUDWater-preparation equipmentSolenis

INDUSTRIES

Solutions for essential industrial sectors

Every sector has different requirements for water quality, process reliability and compliance. We therefore build each program around real operating conditions.

⌂

General industry

Complete solutions for water preparation, treatment and reuse in manufacturing plants of every size.

⚡

Power generation

Chemical water treatment for power plants, district heating, boiler houses, cooling and steam systems.

⬡

Chemical and petrochemical processing

Reliable process, cooling and boiler-water preparation for demanding chemical operations and asset protection.

✚

Pharmaceuticals

Water-treatment systems designed for stringent purity, stability and process-traceability requirements.

◉

Food and beverage

Water preparation and treatment for breweries, dairies, bottling lines and other food-processing plants.

∞

Plastics and rubber

Temperature control, filtration and stable water quality for polymer processing and mould cooling.

◆

Metals and automotive

Cooling, solids removal, emulsion treatment, corrosion control and wastewater management in demanding production processes.

▦

Electronics and precision manufacturing

Low-conductivity water preparation for rinsing, cleaning and processes sensitive to trace minerals and particles.

◎

Geothermal and thermal systems

Control of deposition, corrosion and water quality in water-source heat and closed energy circuits.

PARTNERS

World-class technology with local expert support

We represent proven manufacturers covering chemical treatment, filtration, water preparation, microbiological control and process cooling.

EXPERT RESOURCES

Knowledge for a better decision. A smart enquiry for a faster answer.

Explore how industrial water systems work or use our guided form to send the information needed for an initial technical assessment.

01

Knowledge Centre

Expert guides to cooling and boiler water, closed loops, filtration, reverse osmosis, wastewater, foam control and equipment service.

Explore the Knowledge Centre →
02

Smart technical enquiry

Choose the system or problem. The questionnaire adapts automatically and asks only what matters for your specific technical case.

Start a technical enquiry →

HOW WE WORK

From analysis to measurable performance

01

Inspection and sampling

We study the system, take samples and analyse operating conditions.

02

Engineering solution

We select the chemical program, equipment and control parameters.

03

Implementation and commissioning

We supply, install, tune and verify the system.

04

Continuous supervision

Regular visits let us track results and recommend optimisation.

EXPERT ANSWERS

Frequently asked questions about industrial water treatment

Short answers to the questions we most often address during an initial plant review.

01Why must open cooling water be monitored continuously?

Evaporation concentrates dissolved salts, while the system receives additional contamination and microorganisms from the air. Conductivity and blowdown, scale, corrosion, suspended solids and microbiological growth therefore need to be controlled together.

02What is the difference between an open and a closed cooling loop?

An open system rejects part of its heat through evaporation and continuously receives new water and airborne contamination. A closed loop has no evaporative concentration, but may still corrode because of oxygen, unsuitable pH, glycol or process-water ingress.

03When is a softener sufficient, and when is reverse osmosis required?

Softening removes hardness ions but does not reduce the total concentration of dissolved salts. Reverse osmosis is used when the process, boiler or downstream treatment requires substantially lower conductivity and broader removal of dissolved substances.

04How is a boiler-water program selected?

From feedwater analysis, operating pressure, boiler type, condensate return, steam use and existing equipment. Only then do we define pretreatment, chemical program, dosing points and control limits.

05Can water treatment reduce water and energy consumption?

Yes. Clean heat-transfer surfaces operate more efficiently, correct cycles of concentration reduce unnecessary blowdown, and stable feedwater quality can limit boiler blowdown losses and production downtime.

06How often should water be analysed?

Frequency depends on process risk and dynamics. Critical parameters may be measured continuously, operating tests completed daily or weekly, and detailed expert analysis and system inspection performed under an agreed service plan.

07Do you service cooling towers?

Yes. NTI services cooling towers and can assess both the water-treatment and mechanical sides of the system.

08Do you cover Croatia and Slovenia?

Yes. NTI provides commercial and technical support in Croatia and Slovenia and, depending on the project, works across the wider South-East European region.

CONTACT

Let’s discuss your system

Need technical advice, a review of your existing system or a quotation? Tell us about your process and we will respond as soon as possible.

info@nti.si

CONTACTS IN SLOVENIA

Our expert team

For water-treatment technologies, chemical treatment, electrical engineering, process equipment and sales in Croatia, contact the responsible specialist directly.

BUSINESS DETAILS

Registration and bank account

VAT number: SI16350502
Registration number: 3713407000

Bank account · Banka Sparkasse d.d.
SI56 3400 0101 1525 191