Technology Overview

The company securing the best performance with innovative technology

IRBC-BBR Process

IRBC-BBR (Immersed Rotating Biological Contactor-Bacillus Bio Reactor) is a high-level treatment process for sewage, industrial wastewater and livestock wastewater. High concentration substances, nitrogen and phosphorus are treated safely, efficiently through impregnated IRBC equipment and a bio reactor.


  • Improving sewage and wastewater treatment performance qualitatively
    It is a high-level treatment process that can remove high concentration substances, nitrogen and phosphorus are treated using impregnated IRBC equipment and a bio reactor. It provides an opportunity to improve the quality of treated water innovatively.
  • Easy to improve an existing system
    It is easy to replace a degraded conventional plane table RBC and can change a process without significantly changing a civic structure so it can change to a high-level treatment system.
  • Easy to maintain a sewage treatment system
    It is easy to operate and maintain through a simple treatment process and provides a diagnosis available plan and a troubleshooting manual when a problem occurs − so it is restored to an original condition quickly and provides constant management service through regular walk-around inspection.
  • Economical CAPEX/OPEX
    It has low CAPEX as it utilizes the most of an existing system when improving an existing sewage and wastewater treatment system. It also has low OPEX by innovatively reducing maintenance expenses, so it maximizes the economical effects.

IRBC Equipment

Before attaching microorganisms

Before attaching microorganisms

Principles and Features

  • DISK has a special network structure made of polyvinylidene chloride with excellent property.
  • With over 96% porosity, it has a large contact area and is easy for sewage and wastewater and air to enter and exit so it can treat stably at an even aerobic condition.
  • DISK is fixed on the rotational axis and contacts raw water flowing in while rotating.
  • It is rotating at 2~6rpm while 40% of DISK is being deposited to culture, grow and proliferate microorganisms.
  • DISK absorbs various pollution sources while rotating inside 40% deposited wastewater and oxidizes pollution sources while passing the air at the upper part of wastewater.

Comparison of treatment efficiency by process

Comparison Item IRBC-BBR Process Conventional Activated Sludge Process A₂/O Process
Treatment Efficiency
BOD:96%~ BOD:90%~ BOD:90%~
T-N:80~95% T-N:20~30% T-N:60~75%
T-P:75~90% T-P:10~20% T-P:50~70%


  • Domestic sewage
  • Livestock wastewater
  • Excreta septic tank
  • Landfill leachate
  • Organic factory wastewater
  • Industrial wastewater
  • Recycled water


Giheung Excreta Treatment System 100 tons/day
Jangseong-gun Excreta Treatment System 60 tons/day
Namhae-gun Excreta Treatment System 50 tons/day
Uiryeong-gun Excreta Treatment System 130 tons/day
Gyeongsan Livestock Excreta Treatment System 150 tons/day
Busan Eomgung Sanitation Office 3500 tons/day

Variable Controlled MLE Process

MLE is an upgraded process of an activation sludge process for filthy water and wastewater treatment. Unlike the existing MLE process, VC-MLE can handle load changes actively and is optimized to remove nitrogen by using core equipment of VC-MLE.


  • Using exclusive core equipment
    It can actively handle future reinforcement of the discharged water quality standard using patented equipment our company has developed
    ① Automatic control system
    ② Variable control aerator
    ③ Microbubble silicone air diffuser
  • Simple process
    The bio reactor is composed in the order of an anoxic tank and an oxic tank, with a compatible tank which can be used as an anoxic tank or an oxic tank depending on situations, in the middle. With a simple process, it is easy to operate and the amount of sludge generated is small.
  • Easy to maintain a sewage/wastewater treatment system
    A high-level process optimized to remove nitrogen. It uses organic matters in an influent as an external carbon source for denitrification. It uses a chemical coagulant to remove phosphorus depending on situations.

MLE/VC-MLE Process Comparison


Busan Riverside Sewage Treatment System 1,400 tons/day
Ulsan Bangeojin Sewage Treatment System 40,000 tons/day
Pyeongtaek Tongbok Sewage Treatment System 75,000 tons/day
Gyeongsan Public Sewage Treatment System 40,000 tons/day
Busan Haeundae Sewage Treatment System 65,000 tons/day
Ulsan Yongyeon Sewage Treatment System 250,000 tons/day

Spring Fiber Filter

The fiber filter that separates particulate in water by filtering using fiberThe technology that filters particulates by pressing fiber filter media covering the inner container when filtering using a spring’s driving power and cleans with air and backwash water by relaxing fiber filter media by a spring’s driving power when blocking up media.



  • Less than 1/5 size compared to sand filters
  • Excellent treated water quality
  • Easy to assemble and expand
  • Convenient to operate and maintain


  • Replacing sand filters
  • Removing turbidity of streams and lake water
  • Removing T-P and SS of sewage and wastewater effluent
  • Pre-process of membranes including RO, UF, etc.
  • Package water-treatment system


Pollution Rate Raw Water Treated Water
SS 10~20mg/L 3~5mg/L 0.5~2mg/L
T-P 1.5~2mg/L 1.5~2mg/L 0.1~0.5mg/L
BOD 7~12mg/L 5~8mg/L 3~6mg/L
Turbidity 5~30NTU 2~8NTU 0.2~0.5NTU
30~100NTU 5~10NTU 0.5~1NTU
100~300NTU 5~20NTU 0.5~2NTU


Model No. Flux (M3/hr) Size (mm) Notes
SFF 300N 4~6 Ø300 X 1500H Non-metal or metal module form
Can secure a stable production quantity
with easy assembly and installation
SFF 350N 7~11 Ø350 X 1800H
SFF 400N 11~16 Ø400 X 2000H
SFF 500N 15~22 Ø500 X 2000H Metal module form Can configure as various forms
using an inner filter unit
Small system
Can secure a stable production quantity.
SFF 630M 23~35 Ø630 X 2400H
SFF 900M 32~48 Ø900 X 2400H
SFF 1100M 41~62 Ø1100 X 2400H
SFF 1300M 50~75 Ø1300 X 2400H
SFF 1500M 59~89 Ø1500 X 2400H
SFF 1800M 73~109 Ø1800 X 2400H
SFF 2000M 82~123 Ø2000 X 2400H

- Each filter capacity is based on SS10→1 and may change depending on the condition of raw water.

- Specifications may change without notice. Therefore, please ask our company when designing.

De-iron & De-manganese Filter

This is a technology that filters and removes iron and manganese in water by granulating with oxidation and adsorption oxidation using high concentration coating of MnO2 (10%) on the zeolite (iron, manganese removal media) and filters particles caught in media after backwashing automatically


Filtering after granulating with oxidation and adsorption oxidation of oxygen in water and coating MnO₂ media

  • Mn²+ + MnO₂ → MnO₂ – Mn²+(Adsorption) + O₂(oxidation) → 2MnO₂(granulation)
  • Fe²+ + O₂(oxidation) → Fe³+ + 3OH- → Fe(OH)₃(granulation)


  • WQA certified product satisfying drinking water standard ANSI/NSF61
  • Very large surface area
  • High concentration MnO2 coating (10%)
  • No need to add chemical products under ORP-170mV
  • Chemical recycling not necessary (potassium permanganate, chlorine or chlorine dioxide)


  • De-iron and de-manganese
  • Industrial wastewater treatment
  • Removal of arsenic: Coprecipitation method
  • RO pre-process: 3~4 times increase of the life of a membrane
  • Cooling tower recycle: Reducing blow down dramatically and using as recycled water


Item Influent Outflow Water Note
Flux 3,150m³/d 3,000m³/d
Turbidity 10NTU 0.5NTU
Fe 10mg/L 0.3mg/L
Mn 2mg/L 0.3mg/L


Model No. Flux (m3/hr) Size (mm) Filter Bed Height (mm) Notes
IMRF 1 0.75 ~ 1.4 Ø300 x 1500H 1000 FRP
IMRF 3 2 ~ 4 Ø500 x 1800H 1200
IMRF 5 3.3 ~ 6.6 Ø650 x 1800H 1200 STS304
IMRF 10 7 ~ 13 Ø920 x 1800H
IMRF 15 10 ~ 20 Ø1130 x 1800H
IMRF 20 13 ~ 26 Ø1300 x 1800H
IMRF 30 20 ~ 40 Ø1600 x 1800H
IMRF 50 33 ~ 66 Ø2060 x 1800H
IMRF 65 43 ~ 86 Ø2350 x 1800H
IMRF 100 66 ~ 132 Ø2900 x 1800H

- Dimensions may change depending on the condition of raw water.

- Specifications may change without notice. Therefore, first ask our company when designing.

BYE SCALE - Hardness Transformer

It is a technology that prevents scales from generating by transforming ions including Ca²+, Mg²+,SO₄²-, SiO₂- , PO₄³-, HCO₃-, which are the main factors causing scales in water, into insoluble nanoparticles by media. Nanoparticles and CO₂ formed in the nanoparticle transformation process can remove the existing scales gradually.



  • Salt not necessary
  • Chemicals not necessary
  • Recycling not necessary
  • Economical compared to water softeners


  • Replacing all water softeners
  • Boilers, coolers, heaters
  • Cooling tower
  • Industrial equipment
  • Saunas, dishwashers, etc.
  • Tubes, pipes


Q (m3/hr) BSHT (mm) MBSHT (mm)
0.5 Ø125 x 1,500H Ø250 x 1,500H
1 Ø150 x 1,500H Ø300 x 1,500H
2 Ø200 x 1,500H Ø450 x 1,800H
3 Ø250 x 1,500H Ø550 x 1,800H
4 Ø300 x 1,500H Ø630 x 1,800H
5 Ø300 x 1,800H Ø660 x 1,800H
7.5 Ø350 x 1,800H Ø790 x 1,800H
10 Ø400 x 2,400H Ø950 x 2,400H
15 Ø450 x 2,400H Ø1,140 x 2,400H
20 Ø500 x 3,000H Ø1,240 x 3,000H
25 Ø570 x 3,000H Ø1,400 x 3,000H
30 Ø630 x 3,000H Ø1,600 x 3,000H
40 Ø760 x 3,000H Ø1,780 x 3,000H
50 Ø760 x 3,000H Ø2,000 x 3,000H
75 Ø950 x 3,000H Ø2,480 x 3,000H
100 Ø1,080 x 3,000H Ø2,860 x 3,000H

Automatic Control System

The measurement method using the previous deposition method has a disadvantage. It results in an error caused by external factors (bubbles, etc.) and is difficult to manage. The automatic control system, developed jointly by Busan Environmental Corporation and researchers of Cheongwoo Ace Co., Ltd., makes up for these disadvantages.
It can control operating parameters including an air flow rate, insertion of a coagulant and a returned amount based on a measured value after measuring numerous factors using various sensors attached to a measurement tank after transferring the water in a reactor to a measurement tank.The DO signal light above enables workers to observe the DO signal light easily while coming and going at a site and identifies the DO concentration.


  • Highly accurate due to low external influences
  • Can check water-quality data in real-time
  • Can manage water-quality stably
  • Economical compared to the previous methods

Automatic Control System Equipment

Comparative Data

- Previous methods
Measurement Method Accuracy Measuring Time Water Quality Management Automation Economic Feasibility
Portable meter Error by influence of bubbles 6h (2h*3 times) Quick response unavailable Unavailable Excessive labor costs
Aeration tank deposition type Error by influence of bubbles Real-time Low utilization (error) Unavailable Excessive installation and maintenance costs
- After improvement
Automatic sampling method Accurate due to low external influences Real-time Real-time, individual management Optimum method Economic


KROFTA TYPE-DAF, the world’s best dissolved-air flotation system, has more than 7,000 sources of demand in the world. Over 20,000 units were sold and it can be operated high-efficiently and stably.


  • HRT 3~5 min
  • Air dissolution rate 27%
  • Surface loading 10~40m3/m2h
  • SS removal rate 90~99.5%
  • COD, color, turbidity and oil removal rate 50~99%
  • Zero speed, Swallow tank technology


  • Tertiary treatment of sewage and wastewater, total phosphorus treatment and reclamation
  • Treatment of algae in streams, lake water and dams
  • Treatment of turbidity of water treatment and industrial water treatment systems
  • Pre-process of BWRO/SWRO
  • Sludge concentration and recycle water treatment
  • Filter and membrane (MF, UF, RO, etc.) backwashing water and concentrated water treatment
  • Improvement of the performance of the previous DAF


It is a process that obtains fresh water with high purity by removing solutes dissolved in seawater using semipermeable membrane and osmotic pressure. A process is designed depending on the TDS concentration and used for seawater desalination and wastewater reuse.

BWRO (TDS≤2,000ppm)

SWRO (TDS≤35,000ppm)


  • Very high efficient
  • Can handle load changes.
  • Low CAPEX and OPEX
  • Very simple treatment process
  • Easy to control and automate

Functional Filter

This is a functional filter that fills in media to remove substances polluting water. It can remove TOC, NO₃-N, NH₄+-N, T-P, Fe, Mn, As, SDI and turbidity.


Filter Media Pollutant
TOC removal filter H₂O₂, O₃ + Catalytic Carbon,Oxydes-P TOC,NBDCOD,PFOS,PFOA
Ammonia nitrogen removal filter Zeosorb,Crystolite with Oxydes-P NH₃-N
Nitrate nitrogen removal filter Trappsorb Filter Nitrotrapp Filter NO₃-N
Total phosphorus removal filter Ferrolox,Trappsorb Filter T-P
Arsenic removal filter Titansorb,Ferrolox Filter As(i), As(ii) 10mg/L↓
SDI removal filter Zeosorb,Crystolite Filter Turbidity,SDI(3.5↓)
Turbidity removal filter Kataloxlight, Zeosorb, Crystolite Filter SS,Turbidity
Fluorine removal filter Catalytic Carbon Filter F,TOC,NBDCOD
Biomembrane filter Ceramic,AC T-N,TOC


Application Pollutant Filters
Agricultural water Turbidity, Fe, Mn, HCO₃ BCRF, IMRF, TURF
Underground water Fe, Mn, As, F ASRF, FLRF, IMRF
Industrial water Turbidity, Fe, Mn, Hardness TURF, IMRF, BSHT, MBSHT
Drinking water Fe, Mn, COD, TOC, PFCs IMRF, TOCR, TURF
Cooling water SS, Hardness, COD BSHT, MBSHT, TOCR
RO concentration water T-N,T-P,COD ANRF,NNRF,TOCR,Oxydes-P
Tertiary sewage treatment SS,T-N,T-P,Colour,COD TURF,ANRF,NNRF,TOCR
Wastewater treatment SS,TOC,COD,Colour,Heavy Metal TURF,TOCR,Oxydes-P


Flux (m³/hr) Size (mm) Flux (m³/hr) Size (mm) Flux (m³/hr) Size (mm) Flux (m³/hr) Size (mm)
0.35 Ø150 x 1500H 2 Ø350 x 1800H 7.5 Ø710 x 1800H 25 Ø1270 x 1800H
0.5 Ø200 x 1500H 2.5 Ø400 x 1800H 10 Ø850 x 1800H 30 Ø1400 x 1800H
1 Ø250 x 1500H 3 Ø450 x 1800H 15 Ø980 x 1800H 40 Ø1600 x 2400H
1.5 Ø300 x 1800H 5 Ø570 x 1800H 20 Ø1140 x 1800H 50 Ø1780 x 2400H

Eco-Friendly Filter Media

Eco-friendly Filter Media

This is a granular filter media product with the best performance that can be applied to all areas including drinking water and wastewater treatment. It can coprecipitate through catalysis, filter and remove various organic and inorganic matters using a special method.

Bio filter

This filter decomposes pollutants biologically. It can also perform some filtering functions. It uses carriers shown below as a bio filter.