AST perform in turnkey projects in the area of drinking and industrial water management, headquarters is located in Israel and has a worldwide presence, in selected continents, with projects execution in Europe, China, USA, South America, Africa and elsewhere via a professional distribution network.




Inner Mongolia, China


Produce high purity water from 2 available streams: industrial waste, river water and well water at ultralow energy consumption

Process Capacity:

600m³/h @ 95-98% recovery rate on UF and activated Carbon system @ 0.14kw/m3.


High Purity Industrial and Drinking Water - Coal Mine

The Yellow River AST Water Treatment Plant (YR-AST Plant) has 3 inlet streams:

  • Well Water
  • Industrial Effluent
  • Yellow River Water.

The YR-AST Plant's feed water is supplied via 3 separate 1,500m3 concrete tanks for each stream.
The Plant is designed to produce:

  • 120m3/hr of high quality drinking water
  • 220m3/hr of industrial quality ultra-clean water from raw Yellow River water
  • 260m3/hr of industrial quality ultra-clean water from recycled industrial effluent.

The Yellow River & Industrial Effluent streams for producing industrial standard clean water are completely
separated from the Well Water stream for producing drinking water. The water quality is constantly
monitored and regulated with AST's PLC methods.

The system consists with sedimentation, filter press, media filtration, disk filtration,
ultrafiltration membranes and activated carbon units.  

Plat is equipped with high quality measuring laboratory, control room, chemical storage
and high performance dosage system and etc.

All AST System are fully automated and controlled from a central control room and HMI
which is available at multiple locations worldwide.


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Produce a concentrated stream and high purity desalinated water from the coffee extraction waste water in order to reduce COD levels at the waste pond and recover most of the coffee from the waste

Process Capacity:

5m³/h @ 92-95% recovery (concentration) rate on RO. Brine was reclaimed as coffee product


ZLD Project, COD reduction -
Coffee Producer Extraction Waste Recovery

The AST Coffee waste water reclamation system has a vibratory reverse osmosis system to desalinate the Coffee extraction waste

The facility consists: Pre filtration high level of TSS removal (reduction from 17,500ppm TSS to 2500ppm)
Ultrahigh recovery vibratory shear enhanced reverse osmosis process to concentrate COD
(coffee brix level as EC – from 0.75mS to 14mS)

Below are the three parts of the system:

  1. Pressed media filtration
  2. Dual VSEP skid design with full redundancy
  3. A fully automated CFF and CIP procedure

The outcome of the installation of the system was a total reduction of COD contribution (to 0ppm!)
from the extraction process to the waste stream delivered to municipal WWT and the gain of an additional
coffee that from the extraction process that usually went to the WWT as for an additional RO water to general
usage within the plant.



Inner Mongolia, China


Produce a an ultrahigh concentrated stream and high purity desalinated water from the existing evaporation ponds in order to reduce ponds volume and allow growth of the industrial park without enlarging the brine ponds

Process Capacity:

50 m³/h @ 92-95% recovery rate


Industrial Park open ponds brine reclamation 

The Demo Plant is built from multi station skids. The sand filtration unit, with its associated pump skid and tanks, treats the incoming water from the evaporation pond. A Supplementary Ultrafiltration unit assures a minimum value of suspended solids. A separate reverse osmosis unit produce clean permeate and a brine stream at high recovery rate. A Vibratory Shear Enhanced Processing (A-SEP) Loaded with a Nano filter membrane reduces sulphates from the first reverse osmosis pass. The accumulated permeate from the NF membrane is fed to a second pass of reverse osmosis unit that produce clean permeate. The system is designed to treat 30m3/hr.

Both of the reverse osmosis passes together with clean Ultra filtrated water and with the correct chemical dosage the plant produces water with high quality parameters and yield water that should be suitable for internal usages within the park.

An approximately 4÷6% of the water is being discharged as brine to local evaporation ponds according to local authority regulation.

This Chapter includes the following:

  • Design basis
  • General procedure description
  • Raw Water Analysis



HuiQuan, Fujian, China


Chinese prime beer producer company.

Plant Capacity:

~65 m3/h, product EC < 10 µS.

90% recovery rate

Water source:

Local water supply, typical quality
TDS 350-450 with high carbonate 
and Silica presence.

ROTEC's implementation:

Complete commercial installation
(ROTEC supplying an engineering
package including a control unit).

Status of the project:

Existing system works since July, 2016.

ROTEC LPRO system in beer manufacturing plant

A commercial installation of ROTEC technology in a Low Pressure RO machine (60 m3/h product)
at a Chinese first Class leading beer production factory.

Replace old RO unit kit with similar system capacity . The new design increased recovery rates
from 75% (of old unit) to 90-92%.

A two staged 6:2. ROTEC’s technology reverses the flow between the 2 pressure vessels (PVs) in the 2nd stage to 6 PVs in the 1st stage. By that, every PV which participates in the flow reversal patented process operates only 1/4 of the time as 2nd stage while 3/4 of the time as 1st stage. The flow reversal is necessary to prevent carbonate and silica scaling in the system at ultra-high system recovery.

The increased recovery from 75% to 88-92% ensured by new system leads to decrease of almost 20% in the unit feed demand relative to old system, as a result 62-68% saving in volume of waste brine, lower anti-scalant consumption by 25-50% and smoother operation in terms of lower CIP frequency.  






Santiago, Chile


Produce high purity water from Local Well at ultralow energy consumption and high recovery

Process Capacity:

100m³/h @ overall 90-92.5% recovery rate on UF and RO @ <20kw/m3.

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High Purity Bottling Water - Coca Cola Santiago de Chile

The CCC AST Water Treatment Plant (CCC-AST Plant) has 1 inlet stream:

  • Well Water

The CCC-AST Plant's feed water is supplied via 3 separate 50m3 concrete tanks.  The Plant is designed to produce:

  • 42.4m3/hr of Low TDS bottling water
  • 86.7m3/hr of High purity TDS controlled bottling water

The product for producing low TDS bottling water desalinated in RO unit with ROTEC FR technology  separated from the High purity TDS controlled for producing juice. The water quality is constantly  monitored and regulated with AST's PLC methods.

The system consists with Disk filtration at 50µm, carbon filter, ultrafiltration and a ROTEC unit.  

Plat is equipped with high quality measuring laboratory, control room, chemical storage  and high performance dosage system and etc.

All AST System are fully automated and controlled from a central control room and HMI  which is available at multiple locations worldwide.

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Main Water utilities supplier

Plant Capacity:

11 units of 440-640m³/hr feed

Standard system 75%, upgraded 85% recovery rate

Water source:

Municipal sewage treated effluent

ROTEC's implementation:

Pilot retrofit of 1 operational system (440 m³/hr feed)

Status of the project:

Operational since beginning of 2017

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Improving Process Recovery In main utilities supplier’s water reuse factory via Retrofitting and Integration of ROTEC’s Flow Reversal Technology


The strategic desalination plant in S. Asia operated by countries’ main utility supplier was commissioned at the end of 2002.The latest expansion (2007) gives total capacity of 72,000 m3/d.


Currently, plant operation is restricted to 75% recovery mainly due to scaling limitation posed by the relatively high concentrations of iron, calcium and phosphate in the warm (30 oC) treated feed effluent. In practice, even at 75% recovery, the time intervals between the system downtimes by CIP cleaning (ensued by biofouling or scaling developments), is relatively short (from 2 months to only a few days when there are upsets). Therefore there is a strong incentive for implementation/examination technologies that address scaling problems for achieving more continuous operation (less CIP cleanings- less downtime) and to extraction of more product water from the feed water (i.e. increasing the process recovery).


The current project demonstrates the applicability of ROTEC’s Flow Reversal Technology for scaling suppression in the plant. The demonstration is performed via full-scale industrial retrofit of one of the production trains in the plant. The integration of Flow Reversal Technology via retrofit lead to improvement of the system recovery from 75% to 85 (current)-90(to be tested)%, results in an increase of 13%-20% in the water production capacity of the plant, maintaining similar time intervals between CIP cleanings to current plant.


 The design and operational experience and other practical knowledge that will be gained during the current project can be used as a platfom for further integration of ROTEC’s Flow Reversal proprietary Technology in other similar plants around the country which may have significant positive impact on the water production capacity of the 3rd national tap water source.


A noted feature of the proposed system retrofit is its being 100% reversible, meaning that at any given time the system can simply revert (by opening/closing valves) to operating according to its initial-original configuration before the retrofit. 


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