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Hanna 2 is a mobile liquid waste treatment unit. The unit is capable of performing programmed or manual treatment steps of liquid waste as acidification, reduction, chemical oxidation, coagulation/flocculation & filtration. The unit is based on a Ro-Ro platform, sized as a 20’ container. This feature facilitates ease of transportation of the unit to any site in the world. The unit is operational within 3-6 hours from arrival to site.
Waste pumping stations
Treatment reactors
Treated liquid waste holding tanks
Chemical mixing & dosing units
Control buffer
Control room
Sand and activated carbon filtration for effluent polishing (Optional)
Project #1
Client: Israeli Electrical Company ltd. (IEC)
Problem :
IEC performs chemical cleaning of piping and boilers at its power stations on regular basis. For this purpose the IEC uses both inorganic and organic acids and bases mixed with various chemicals as corrosion inhibitors.
As all IEC’s main station are located on the sea shore and are not connected to sewer systems, the effluents from the chemical cleaning operations have to be purified to a degree which enables discharge to the sea.
Generally, between 2000-6000 m3 (500,000-1,500,000 gal.) of effluents are produced during a chemical cleaning operation. Due to limited storage capacity at the power stations, the effluents need to be evacuated from the holding ponds at a very tight schedule in order to enable the proper progression of the chemical cleaning process. The IEC, lacking proper treatment facilities, had to haul the effluents to a remote industrial waste disposal site with great expense, causing environmental nuisance.
An Arrow Solution:
Arrow Operations and Technologies (from the founders of Arrow Ecology Ltd) had been asked by the IEC to provide an Environmentally safe and cost effective solution for the problem of purifying the effluents from IEC’s chemical cleaning
operations.
The IEC’s main requirements were:
To provide effluent quality sufficient for marine discharge. )
To provide a response time of days for the setting up of a functional field treatment unit.
To provide treatment capacity sufficient for the requirements of the chemical cleaning schedule. In 1994, after proving both treatment quality and engineering excellence in designing and manufacturing the mobile liquid waste treatment unit, Arrow was awarded a contract from the IEC for the treatment and marine discharge of more then 12,000 m3 (3,000,000 gal.) of waste water. Since then, Arrow’s mobile units are serving the IEC in liquid waste treatment at 4 major power stations. The treated effluents are being monitored continuously and discharged to the sea under the approval of the Israeli Ministry of the Environment. The treatment units, operating at a maximal capacity of 240 m3/day, are providing the IEC with a cost effective and reliable solution, enabling the IEC to keep its tight schedule of shutting down production units for cleaning.
Project #2 :
Client : BEST Co. (USA) acting for the Israeli Electrical Company ltd. (IEC)
Problem :
A large fire took place at a southern Israeli power station. As a result, transformer oil containing Polychlorinated Biphenyls (PCB’s) was accidentally released into the station’s drainage system and found its way to the station’s cooling water
channels. Part of the water was contained due to emergency shut-off of the channels. These water were highly polluted with oil, heavy metals as Chromium and PCB’s. Levels of PCB’s in the polluted water reached 100 ppm, 100,000 times more then the allowed level of discharge of PCB’s to the environment – 1 ppb.
BEST Co. of Atlanta USA was selected as main supervising contractor for the remediation activities at the power station. In order for the station to resume its activities, its cooling water channels, carrying ~ 10,000 m3 (2,500,00 gal.) of PCB-polluted water had to be cleaned. At that time it seemed that the only solution was to transport these massive volumes of liquid waste to a remote industrial waste disposal site with great expense, causing environmental nuisance.
An Arrow Solution:
The IEC, who recognized Arrow’s capabilities in the field of mobile liquid waste treatment, has recommended that BEST Co. would undersign Arrow to provide an alternative for the costly and environmentally hazardous transportation of the waste to the remote disposal site. Arrow had accepted the challenge and placed a mobile liquid waste treatment unit at the power station. The effluents had to be discharged to the sea, hence, a purity level of less than 1 ppb was pre-set by the Israeli Ministry of the Environment. Arrow’s scientists and engineers have designed a custom-made physico-chemical treatment process, employing the mobile unit’s versatile functions. The result was clear effluents with less than 1 ppb of PCB. The water was tested daily using GC-MS by an USEPA-approved laboratory prior to discharging it to the sea. Treatment capacity reached 240 m3/day, operating for 24 hours.
Arrow’s mobile unit had treated all the contaminated water, facilitating the rapid renovation of the cooling water channels. The PCB’s were stabilized in semi-solid sediments having 1000 times less volume then the treated water. This inert sediment was safely transported to an approved hazardous waste landfill.
Industrie du pétrole et du gaz
Minière et Carrière
Chimique
Métaux et davantage
