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Biological installations for Industrial plants
Arrow Ecology builds and operates installations for industries like: Food industries, Petro-chemical industries and others, with unique technologies (anaerobic &aerobic treatment). Biological installations for industrial plantsAnaerobic & aerobic treatment of industrial wastewater. Arrow Ecology’s treatment can be used to treat nearly every type of wastewater that contains biodegradable organic matter.  Anaerobic:For highly concentrated organic wastewater. Less accumulation of sludge. Less energy consumption and lower land requirements. Environmental friendly installation and energy production. Aerobic (activated-sludge)Treatment of hard type organic matter and wide range of organic concentrations. Biodegradable COD concentrations ranging from about 50 to 10,000 mg/l. Slow biodegradable, xenobiotic, and inhibitory materials.  
Biological installations for the Agriculture
Arrow Ecology builds and operates installations for the treatment of wastewater and sludge from Agricultural entities like: cowsheds, olive plants etc Agricultural Waste Treatment - System characteristics The main technical components of the treatment system are:Screw press type separators – The screw press is designed specifically for pig waste applications. Each separator unit has a capacity range of 1-2 m3/h and a yield of 30-35% dry material .Anaerobic biological reactor – Computer controlled reactor made with corrosion resistant materials. The reactor is equipped with temperature, pH and level sensors in the basic system and can be upgraded to include other sensors such as on-line gas monitor, sludge height and TSS level sensors. The reactor is of mesothermic type, operated at ~ 40°C. Heating coils based on hot water or steam are installed in the reactor.Clarifier – Conical clarifier equipped with sedimentation enhancing plates. The clarifier is designed to allow a sufficient hydraulic retention time for optimal separation of biological particles.Sludge circulation pumps – Circulation pumps are of positive displacement screw type pumps. These pumps do not require priming and can handle sludge solids without damage to the microscopic structure of the sludge particle.Concrete slabs for compost curingBiogas operated steam and/or electricity generator (Optional) 
Mobile Thermal treatment installation
Technology | From Israel 
Thermal Treatment of Hazardous Waste - Mobile IncineratorsThe transportable Waste Incineration System (TWIS) is designed to be transported to sites requiring soil remediation, destruction of hydrocarbon sludge and hazardous waste incineration. For example, it was set up on a barge and transported by it to the site in Alaska where the Exxon-Valdez oil tanker had run aground and released its oil cargo into the environment. The TWIS is carrying valid operational permits in the USA.  The TWIS consists of the following essential elements: Solid waste feed hopperVariable-speed feed screw delivering the wastes into the rotary kilnCombination oil/gas burner, with dedicated combustion air blower, and air-atomized fuel oil burner which provides the heat needed to maintain a kiln exit gas temperature of approximately 1500°F while feeding solid wastes or liquid wastes.Air-atomized nozzle which can be used for injection of suitably-prepared wastes or fuels into the burner end of the kiln.Variable-speed drive which rotates the kiln, used to control the "burnout" of the solids.Screw take-away conveyor which collects the processed solids from the end of the kiln and delivers them to the processed solids storage hopper.Refractory -lined cyclone which separates the air-borne fine solids from the gases leaving the kiln, returning them through a pair of flap-discharge valves to the processed-soil conveyor.Refractory blanket-lined secondary chamber serving as an after-burner, which raises the temperature of the gases leaving the cyclone to 1800°-2000°F, employing a gas/oil-fired burner to achieve and automatically maintain this temperature. The secondary burner oil-atomizing gun can be used to burn selected liquid wastes in the secondary chamber .A Fisher-Klosterman (F-K) emission control system uses water to quench the gases leaving the secondary chamber from 1800°-2000°F to about 190°F, while they pass through a “flooded elbow” venturi scrubber to absorb and remove particulate matter, and then through a packed bed scrubbing tower.The acid gases absorbed by the scrubber water are neutralized by injection of sodium hydroxide, which is added to maintain the pH at about 7. The circulating water, containing particulate matter and salts is blown down as needed to keep the total solids at an acceptable level. Makeup water is added to compensate for the water evaporated as the gases are cooled, and the blow-down need to control the solids content.A demister unit is installed at the end of the flue gas treatment train. This demister acts as a mist eliminator, thus reducing mist and particulate matter which escapes the scrubber. This unit provides the final “safety guard” for keeping emissions of heavy metals and particulates below required levels.The induced-draft (induction) fan pulls the gases through the entire system and discharges them through the stack to the atmosphere. Atmospheric air is drawn in through clearances in the front seal of the kiln, providing combustion air for fuel and organic wastes in excess of that provided by the oil/gas burner blower. Oxygen monitors located at the exit of the kiln and the secondary chamber are used to assure sufficient excess oxygen. Treatment Capacity:Waste intake:Up to 10 ton/hourTypes of Waste:Soils polluted with hydrocarbonsOily sludgeOrganic residues as distillation bottoms or process sludgeSpent organics as used solvents and oilsInfectious and/or bio-hazardous medicalMunicipal waste Emission Control System:The emission control system of the TWIS is described below. The cyclone removes all of the coarse and most of the fine particles from the gases leaving the rotary kiln. The secondary chamber serves as an after-burner in order to destroy organic matter contained in the gases leaving the cyclone. Temperatures above 1600°F along with a retention time of two seconds are found to be sufficient for destruction of essentially all organic matter. However, to assure destruction of more refractory organics, such as PCB’s, or when the chlorine content of the waste exceeds 1%, regulatory agencies have recommended that 2000°F be maintained at the exit of the secondary chamber. The TWIS has the capability of maintaining this temperature when or if needed. Gases leaving the secondary chamber are quenched with water sprays before entering the venturi section of the scrubber. The venturi causes agglomeration of particulate matter, and absorption of particulate into the water. The gas temperature is reduced, approaching 180°F before entering the packed tower. The packed tower is effective in removing remaining particulate, but is specifically provided in order to absorb acid gases, including sulfur dioxide, hydrogen chloride and hydrogen fluoride. Water is sprayed over the packed bed. As it falls, it absorbs the acids, reducing its pH. In order to maintain stable pH values, caustic soda (NaOH) is added, controlled by a pH meter. The pH of blow-down is conventionally maintained at roughly 7.0 in order to meet regulatory discharge requirements to sewers. A demister unit is installed at the end of the flue gas treatment train. This demister acts as a mist eliminator, thus reducing mist and particulate matter which escapes the scrubber. This unit provides the final “safety guard” for keeping emissions of heavy metals and particulates below required levels. This unit is considered as Best Available Technology for pollution control is wet scrubbing systems as employed in the TWIS. The TWIS in equipped with a state-of-the-art continuous on-line emission monitoring system (OEM). The system is computer-controlled and interacts with important unit features as burner control following the reading obtained by the system. The continuous emission monitoring system samples and records levels of:COCO2THC - Total HydrocarbonsOpacity & Particulate matter  
Mobile unit for treating wastewater – “HANAH”
Arrow Ecology developed a unique mobile system for the treatment of inorganic wastewater. It can be positioned at the site within one hour and treat about 240 cubic meters per day. It is based on Physico-Chemical methods and can handle effectively ecological disasters and the results of industrial chemical processes
Physico-chemical installations
Technology | From Israel 
Arrow Ecology builds and operates installations for industries that produce wastewater and sludge with heavy metals. This includes Hi-tech industries, Metal industries and others. Regional treatment center for industrial waste-water Arrow Ecology is implementing in Israel the principal of treating industrial wastewater close to their origin, as being applied in modern countries. Arrow has erected a regional treatment center for industrial wastewater, which receives water from various plants and treats them according to state and local regulations. Many industrial wastewater generators do not produce sufficient volumes of wastewater to justify the installation and operation of in-house treatment unit. The regional center serves a large number of wastewater generators, a fact which enables the economical and efficient operation of a treatment center. The services provided by the treatment center are based on treated volume and wastewater characteristics. The cost of treatment enables the client to solve its wastewater problems without massive investments or employment of excessive manpower. The treatment center includes physico-chemical treatment units that provide safe and efficient neutralization of acids and bases, cyanides and chromate, sludge treatment and oily wastewater. The toxic fraction of the wastewater, like heavy metals, is greatly reduced and is sent for burial in a special depository. The volume reduction of hazardous waste by the regional treatment center has an added value – the prevention of conveying hazardous and toxic volumes of wastewater to distant treatment centers. 
Recovering crude oil tanks
Service | From Israel 
Recovering crude oil tanks through hydrothermal techniques by connecting to the existing pipes with no need for changes. This treatment will enlarge the operating volumes in a very short period (about 14 days). It is possible to achieve “gas free” conditions.
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