Compact Water Treatment Plants
Water Turbidity>100
At glance: The Water Turbidity>100-treatment plant is: A
compact unit
No structure is needed
Easy to operate
Low operational cost
The plant treating and purifying water for drinking purposes
Source of row water can be river water or borehole water
The plant does not treat salty water
The plant can treat 15 M3 of water per hour equal to 360 M3 in 24 Hours
The Company Compact Water Package Treatment Plants are designed to supply high quality and safe water for small and medium communities. The Company compact and modular concept ensures to meet water quality requirements and potable water production. (According to the water specifications). The Company Compact Water Package Treatment Plant is completely factory built and delivered in steel shell package (containers), convenient for transportation and requiring minimal on–site assembly and installation work. This prefabricated construction and ODIS manufacturing capacity offer a speedy delivery and installation of plants with different capacities and lot of varieties for flocculation, filtration and disinfections. The Company package plant is based on standard and customized improved design criteria. Cost saving technology, simplicity and reliability of performances are its main characteristics. The Company integrates conventional physico-chemical treatment of the raw water by coagulation-flocculation, solids removal by settling, filtration and disinfecting. The Company is able to treat water with a variable and broad range of suspended solids and turbidity. Technological advances are utilized both in clarifier and filtration units and low detention times and high efficiencies are obtained. The Company produces safe, quality water having an effluent quality assurance that meets international and local drinking water standards. The Company Compact Water Package Treatment Plants are fully automatic and all operating modes controlled by Programmable Logic Controller (PLC).
Compact Water Treatment Plants The Company series is produced by factory in respect with the rules of ISO. The plants are based on chemical treatment, settling, filtration and disinfections. The systems are delivered in steel shell package (containers) and are ready for on-site installation. The installation required: Connection of power (electrical energy supply); Connection of piping system (for raw water supply, for filtered water distribution and for drainage); Placement of the filter media. •
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The plants ensure a reliable approach for standard processes and customized needs. The typical flow configuration consists of coarse solids separation, chemical addition, prior to clarification, enhanced clarification in DECA (developed in Israel) and fines filtration of the water in deep bed multi media filters. The filtered water is disinfected using Hypochlorite solution. solution. Provision for the feed of special chemical may be ordered. Raw water: Source water –
surface water approved by local rules for drinking water.
Raw water quality -
water with high turbidity from surface sources like rivers, lakes etc., free from heavy metals or toxic substances.
Guaranteed quality of the treated water: Turbidity -
less than 1 NTU (in compliance with WHO drinking water standards). Residual chlorine concentration - 0.2 PPM.
Hours of operation:
Up to 24 h/day
Chemicals – Chemicals – according to FDA regulations for drinking water.
Disinfections – Disinfections – Hypochlorite solution Modularity – The treatment plants are modular and easy expandable. Installation – The treatment plants are packed in steel shell containers, which allow convenient transportation, simple on-site installation, and mobility. Operation – Operation – Reliable functioning and low operating cost.
System Description •
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Primary Separation: takes place in cyclonic separators (hydrocyclones) of 5000 series and a clarifier/flocculator tanks. The sand and coarse solids separated by hydrocyclones are drained through an automatic valve. Coagulation: Coagulant is injected ahead of the cyclonic separator in order to destabilize the colloidal particles in suspension and to bring about agglomeration. Clarification (Coagulation and Settling): takes place in the DECA Clarifier. The purpose of the DECA clarifier is to separate the heavy loads of suspended solids and colloidal matter from the raw water. In this unit the sludge is separated from the clarified water in a settling zone then recycled to a mixing zone. Coagulation is injected to bring about bridging between the particles and to further improve the separation. The effluent from the DECA Clarifier is pumped through a booster pump to the filtration stage. Multimedia Depth Filtration: performed by an array of multimedia filters with high depth media bed for final effluent polish at relatively low filtration rate. Effluent water quality less than 1 NTU. Disinfection: injects Hypochlorite to remove all pathogenic microorganisms from the treated water. The disinfecting unit is fully automatic and controlled by residual chlorine controller. Automation and Control: the systems are equipped with PLC (Programmable Logic Controller), which supervises the entire automatic functioning of the separation and filtration process. The systems backwash automatically by OP or when a preset time interval elapses.
Main Elements of the System Self-Cleaning Suction Strainer (optional) The Company self-cleaning suction strainer is designed to protect the pump clogging by debris, trash and solids dirt. It is connected to the pump inlet and submerged in the water source (river, lake, reservoir etc.). All the pumped water flows through the strainer and the debris are stopped on the screen, protecting the pump from clogging or getting damages by the debris resulting in increased pump efficiency and reducing maintenance costs. The screen is kept clean by the continuously rotating jets (using pump pressure through the return line) blowing away the debris from the screen.
Hydro cyclone Separator The ODIS Hydro cyclone separator is a simple device, easy to operate and maintain. It has no moving parts or screens. The hydro cyclone separates sand and other solids matter with very little head loss and 90% or better efficiency no head loss build up and no clogging by solids being separated. The Hydro cyclone use tangential injection flow process, enhancing the centrifugal forces and moving solid particles outwards. The dispersed particles move downwards in a spiral path into the underflow chamber, while clean liquid moves upward to the center of the spiral, towards the top outlet.
“DECA” Clarifier (optional) The Company “DECA” Clarifier is an automatic hydraulic device, pecially designed to accelerate reactions through methodical recirculation of the precipitates formed by the flocculent and influent water. The “DECA” Clarifier operates continuously, to provide required effluent water quality. The Clarifier consists of three chambers:
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Flocculation (reaction) chamber is a central conical chamber, where influent water ejected through special nozzle.
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Intermediate cylinder, to reach a good growth of the flock.
Settling chamber, where a separation between sludge and the effluent water is achieved.
The water to be treated, mixed with flocculent, enter the DECA Clarifier through a venturi type online flocculator placed in the bottom of internal (reaction) chamber. The up-stream flow of flocculated particles over close to the top to the intermediate cylinder chamber. This way the liquid is forced to flow downward precipitating heavier particles. The sludge deposited in the settling chamber returns to the reaction chamber by induced flow. The resulting sludge “enrichment” allows rapid flocculation and formation of the dense precipitate. The conical floor of the unit help the sludge slide toward the ejector for re-circulation. Concentrated sludge is collected at the bottom hopper and periodically released to drain. The effluent flows over the truncated conical collector into the intermediate tank for further treatment. The “DECA” Clarifier has no moving parts.
Multi Media Filters The Company Multi media filters use combination of media layers as gravel, sand and anthracite as a bed that captures the suspended matter in the water flowing through. Multi media filters (DW series with total media height 1000 mm) use a unique design of a double bottom chamber divided by a welded reinforced steel plate. The upper chamber contains the multi media and the lower chamber is empty and collects the filtered water. The plate is covered by “mushroom” diffusers, which are plastic, slotted conical units. The disperse of water uniformly, using effectively the whole media volume avoiding the occurrence of channeling caking when operated correctly. The filter particularly suitable for back flushing – a process involving reversal of the water flow, causing a turbulent expansion of the media as a fluidized bed. The flushes out the entrapped debris effectively. After the back flushing is completed, the filter resumes its normal filtering mode as clean as a new filter. The back flush process activated automatically by controller or manually according to manufacturer instructions.
Double Bottom Chamber ODIS DW series filters employ a unique design of a double bottom chamber, divided by a welded reinforced steel plate. The upper chamber contains the media; the lower chamber is empty and collects the filtered water. The plate is covered by “mushroom” filtration nozzles, which are plastic slotted conical units. The nozzles disperse the water uniformly, effectively fluidizing the entire media volume during backwash. The Company filtration nozzles model E400-720
Type L prevent the occurrence of channeling or caking thus ensuring long service life and less frequent media replacement. The Company filtration nozzles model E400-720
Media Chart
Media Type Basalt Quartz
Anthracite
Media Particle Size
Media Height (mm)
1.2-1.8 mm 0.8-1.2 mm 1.2-1.6 mm
100 550 350
Chemical Treatment The water treatment plant integrates three types of chemical treatment: •
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Coagulant: Alum Coagulant: Alum (a coagulant) is injected into the raw water in order to destabilize the colloidal matter and into flock. Flocculent (optional): Anionic (optional): Anionic polymer is injected into the mixing zone of the clarifier/flocculator to create the bridging mechanism and to further improve the separation of suspended solids. Disinfection: Chlorine (a disinfectant) is injected at the end of the process in order to kill harmful pathogenic microorganisms and supply disinfected drinking water.
Diesel Generator The Company system includes Diesel Generator as a backup system in cases of electricity failure (in this case the Diesel system will start working automatically) or in cases of no available electricity power on site. The Diesel Generator system includes a fuel tank that is stored inside an attached shade to prevent any damage to the system.
Capacity: 50 KVA Motor: Diesel
Automation and Control The water treatment plant is fully automatic and all operating modes are controlled by a PLC (Programmable Logic Controller). Controller). The PLC receives signals from the floating levels, the electric valves (with solenoids) and different controllers, thus controlling the start and stop of the filtration pump, other pumps, chemicals dosing pumps, sludge withdrawal, filtration mode and backwash mode. Electrical Connection: Three Phases 3X400V (3X440V 60Hz may be ordered)
Reservoir Volume Chart In order to ensure effective disinfections, retention time of 30 minutes is required after the chlorine injection. System flow rate ( l/sec ) 4 10 15 20 25 30 50
Minimum Required Tank Volume 7.5 m3 18 m3 27 m3 36 m3 45 m3 54 m3 90 m3
Connecting Accessories The water treatment plant elements are connected with manifolds and couplers, which are shot blast cleaned, phosphatized and lined with extremely corrosion proof polyester electrostatic spay. The connecting accessories employed by ODIS produce user-friendly system which requires minimal maintenance, are easily disassembled / reassembled and are designed for long lasting operating life.
View inside the Plant
Manifolds All manifolds including bolts, nuts, washers and jointing materials is supplied and installed as part of the Company Compact Water Treatment Plants. The manifolds, couplers and connection elements conform to ASA, British Standard or ISO or other equivalent Standard approved by client. The manifolds are made of plated carbon steel and have a 100-micron protective coating of extra durable polyester applied electro-statically and oven cured on a zinc-phosphate layer for maximal anti-corrosion protection. The internal and external coating of manifolds and accessories is suitable for withstanding the effects of local climatic conditions, the quality of the water and other corrosive factors.
Valves and Other Accessories All valves and accessories are used in the WaterPoint ® Compact Water Treatment Plants - the high quality, fully tested equipment.
Structure Materials The water treatment plant filters and separators are manufactured from robust first use carbon steel ST 37 ensuring long lasting system operating life.
Lining Process The water treatment plant filters and separators lining employs maximum anti-corrosion protection safeguarding the parts from weather, rust and chemicals. The lining process is performed in seven stages as follows: •
Stage 1: 1: automated shot shot blast cleaning to a level of of SA 2 ½ as per ISO 8501 8501
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Stage 2: 2: phosphatization phosphatization – adds a protective layer of zinc-phosphate
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Stage 3: 3: rinsing
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Stage 4: 4: sealing
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Stage 5: 5: drying
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Stage 6: 6: electrostatic polyester spraying
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Stage 7: 7: oven curing
This lining process creates a perfectly coated product with a protective layer of 150 micron.
Electrical Equipment All the electrical and electromechanical equipment including the required switchboards, sub-boards, sub-boards, control and indicating panels, electric motors, starters, cables, etc., are supplied ready for operation. The electrical and electromechanical equipment incorporated in The Company Compact Water Treatment Plants is manufactured in accordance with the standards and codes of IEC or VDE and with the other relevant standards and codes. The electrical equipment is of standard heavy design, suitable for operation under the existing climatic conditions and the duties set out in this specification.
Indicating Instruments The indicating Instruments comply with IEC specifications. The Company provide all indicating lights with colored, transparent caps. The colors of the caps indicate the function of the light as follows: Green: For normal operation of unit Red:
For malfunction or alarm light
Blue and Yellow and Yellow:: For other functions
Scope of Supply: Description • • • • • • • • • • • • • • • • • •
Feeding pump Cyclone mixer DECA Clarifier/Se Clarifier/Separato paratorr unit - stag Multi media filters - stage 2 Coagulation unit Connecting manifolds Hydraulic valves Flow limiting valves Water meter Pneumatic valves Control panel with PLC controller Control accessories Chlorinating unit Eye wash safety device Compressor Diesel Generator Air blower 40’ mobile steel structure
