Process

Membrane Bio Reactor

About

Membrane system consists of two sections: Membrane case in which membrane cartridges are installed, and Diffuser Case equipped with diffuser pipes. Designed to be a base of membrane case, Diffuser case is installed to the bottom. One membrane (single deck) or two membrane (double deck) will be installed on it.
Two pieces of membrane sheet, made of chlorinated polyethylene(C-PW) with an average pore size of 0.2 micro meter, are welded on the two sides of supporting plate respectively.
Driven by pump suction or gravity, treated water permeates through membrane sheets, comes out via nozzle and tube, and then converges to the manifold, while the mixed liquor suspended solids remains in the biological treatment process.
Flow from outside to inside the panel is either by suction or under gravity, routinely between 0.5 and 1.3 m hydrostatic head for gravity- fed operation. Permeate is extracted from a single point at the top of each membrane panel via a polyurethane tube. Aeration via coarse bubble aerators is applied at the base of the tank so as to provide some oxygenation of the biomass, in addition to aerating the membrane stack.


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Quartz Filter

About

A very first stage of water filtration system through the sand bed for the removal of Suspended solids from the biological treatment. Designed with multi-layer filters with granulometry range from 1.5 mm to 3 mm to reduce the backwashing in numbers and increase quality of the outlet water. Double bottom plates divide the best distribution and best drainage of the system. 0.25 mm Polypropylene nozzles designed with advantage of uniform air and water distribution on the filter and backwashing process.


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Ultra Filtration

About

Ultra filtration plant is made of capillary membranes for the treatment of water coming from the biological process. The process of the ultrafiltration unit is divided in different operating modes. These are defined by a specific valve status. A defined sequence of different operating modes is characterized as filtration cycle. After a specified number of filtration cycles, a chemical enhanced backwash occurs Depending on different conditions, it can be advantageous to conduct the chemical enhanced backwash with two different chemicals. Thereby, an optimum adaptation of the plant operation to the water quality is provided. The operating modes are defined by specific valve status (open/close) and pump status. During the operating mode "Filtration" the principal filtration occurs. The water is pressed from the feed side through the membrane capillaries to the filtrate side the backwashing of the membrane is called "Backwash". In contrast to the "Filtration", clean water is pressed from the filtrate side through the membrane to feed side into the drain. The plant is completely automatic, pre-assembled on AISI 304 stainless steel skid and it is controlled by a PLC unit equipped with operator interface.


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Micro Filtration

About

One of the fundamental parameters for the industrial use is related to the hardness, defined as the sum of the ion’s Ca++ and Mg++, present in it. The sum of Ca++ and Mg++ ions exchanged by the ion exchange resin media which is designed with 90 GPL hardness absorbance through the exchange process. A defined sequence of different operating modes is characterized as filtration cycle. After a specified number of filtration cycles, a chemical enhanced backwash occurs Depending on different conditions, it can be advantageous to conduct the chemical enhanced backwash with two different chemicals.


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Softner Filter

About

One of the fundamental parameters for the industrial use is related to the hardness, defined as the sum of the ion’s Ca++ and Mg++, present in it. The sum of Ca++ and Mg++ ions exchanged by the ion exchange resin media which is designed with 90 GPL hardness absorbance through the exchange process. Perform as Scale and pressure reducer to the membrane filters. At specified stage, required regeneration with the HCL to regenerate the resin by releasing the absorbed hardness as a reject. The softening is normally made by a strong cationic resin, regenerated with Hydrochloric acid. The active groups of the regenerated resin are saturated with H++ ions, which are exchanged with Ca++ and Mg++ ions of the water to be treated.


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De-carbonating Tower

About

A process which elimination of Carbonaceous gases from the effluent water by means of degassed tower realized in polypropylene rashing type ring with polypropylene filling materials. Aeration applied on the bottom of tower by blowing a centrifugal fan to breakdown the carbonate from the hydrocarbons and bicarbonates. Through the De-carbonating tower, the yield of CO2 removal varies between 85-90%, with the consequent reduction of TDS in the treated effluent, this involves a further advantage in the next treatment of Reverse Osmosis. PLC automatic controller designed for the acid/alkali dosage depends on pH and gaseous removal.


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Reverse Osmosis

About

Reverse Osmosis Process is the forced passage of water through a membrane against the natural osmotic pressure to accomplish separation of ions and water. In the process of Osmosis, a thin membrane of suitable material (Cellulose Acetate Polyamide) (0.10 to 0.15 mm thick) separates two salt solutions. Water from the side of lower salt concentration flows through the membrane to the solution of high concentration, attempting to equalize the salt content, while the membrane allowing water flow blocks passage of salt ions. If pressure is applied to the side of higher salt content, flow of water can be prevented. This pressure at no net flow is called osmotic pressure. The osmotic pressure of sea water is about 350 psi; brackish ground water pressure, having a lower salt concentration, is significantly less. If pressure is increased, the water flow is reversed and passes from salt water to fresh water. In this manner the salts are separated from the solution. The rate of water transfer depends primarily on the difference in salt concentration between the solutions, characteristics of the membrane and magnitude of the applied pressure. Spiral wound module, is constructed of large membrane sheets covering both sides of a porous packing material that collect permeate. The membranes are sea pairs on the two long edges and one end to form an envelope enclosing the permeate collector. The other end of the membrane envelope is connected to a central perforated tube, which receives and carries away permeate from the collectors. Several of these membrane envelopes with mesh spacers between them for brine flow are rolled up to form a spiral wound module.


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Nano Filtration

About

Nano filtration process using relatively open RO membranes, allowing water and small monovalent ions (Na+, K+, and Cl-) to pass. A membrane with low permeability, the difference in osmotic pressure between the two compartments can become high as for a RO system, while with a membrane with high permeability, the osmotic pressure is drastically reduced. The system works automatically, modulating the pressure and the flow rate in inlet, using inverters, analogic instruments and a PLC system. Instruments such as pressure transmitters, flow meters, pH-meters and conductivity, control strictly the process and optimize the system, improving energetic efficiency.


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Multiple Effect Evaporator

About

The circulation of liquids from one unit to another one can take place in the same direction of the circulation of steam (co-current) or in opposite directions (counter current). The optimal number of evaporators in series (effects, n) to be used in a plant of this type results from an economic balance between the cost due to consumption of energy (which decreases if n increases) and the investment cost (which increases if in increases). To accelerate and recover the GLAUBER Salt the efficient system is Crystallizer and for the mixed salt’s crystals contained in the mother water, one of the most efficient systems is the Agitated Thin Film dryer.


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