PACT Engineering Sharjah

PACT® Demineralization  is the process of removing mineral salts from water by using the ion exchange process. Demineralised water is water completely free (or almost) of dissolved minerals as a result of one of the following processes: Distillation Deionization Membrane filtration (reverse osmosis or nano filtration) Electrolysis Or other technologies. Demineralized water also known as Deionized water, water that has had its mineral ions removed. Mineral ions such as cations of sodium, calcium, iron, copper, etc. and anions such as chloride, sulphate, nitrate, etc. are common ions present in water. The progress converts all salts of calcium, magnesium, sodium, and other metal cations to their corresponding acids with cation exchange resin (s), then removes these acids with the appropriate anion exchange resin (s). The demineralization operation can be a sequential cation-anion process (single beds or layered beds) or an intimate mixture of cation and anion. Ion Exchange Resins There are two basic types of resin – cation-exchange and anion-exchange resins. Cation exchange resins will release Hydrogen (H+) ions or other positively charged ions in exchange for impurity cations present in the water. Anion exchange resins will release hydroxyl (OH-) ions or other negatively charged ions in exchange for impurity anions present in the water. There are three ways in which ion-exchange technology can be used in water treatment and purification: first, cation-exchange resins alone can be employed to soften water by base exchange; secondly, anion-exchange resins alone can be used for organic scavenging or nitrate removal; and thirdly, combinations of cation-exchange and anion-exchange resins can be used to remove virtually all the ionic impurities present in the feed water, a process known as deionization. Water deionization purification process results in water of exceptionally high quality. Deionization For many laboratory and industrial applications, high-purity water which is essentially free from ionic contaminants is required. Water of this quality can be produced by deionization. The two most common types of deionization are: two-bed deionization and mixed-bed deionization. Two-bed deionization The two-bed deionizer consists of two vessels – one containing a cation-exchange resin in the hydrogen (H+) form and the other containing an anion resin in the hydroxyl (OH-) form. Water flows through the cation column, whereupon all the cations are exchanged for hydrogen ions. To keep the water electrically balanced, for every monovalent cation, e.g. Na+, one hydrogen ion is exchanged and for every divalent cation, e.g. Ca2+, or Mg2+, two hydrogen ions are exchanged. The same principle applies when considering anion-exchange. The decationised water then flows through the anion column. This time, all the negatively charged ions are exchanged for hydroxide ions which then combine with the hydrogen ions to form water (H2O). Mixed-bed deionization In mixed-bed deionizers the cation-exchange and anion-exchange resins are intimately mixed and contained in a single pressure vessel. The thorough mixture of cation-exchangers and anion-exchangers in a single column makes a mixed-bed deionizer equivalent to a lengthy series of two-bed plants. As a result, the water quality obtained from a mixed-bed deionizer is appreciably higher than that produced by a two-bed plant. Although more efficient in purifying the incoming feed-water, mixed-bed plants are more sensitive to impurities in the water supply and involve a more complicated regeneration process. Mixed-bed deionizers are normally used to ‘polish’ the water to higher levels of purity after it has been initially treated by either a two-bed deionizer or a reverse osmosis unit. Electrodeionization EDI Electrodeionization Systems remove ions from aqueous streams, typically in conjunction with reverse osmosis (RO) and other purification devices. Major Applications: Ion Exchange Plants Softener Industrial DM Plant Two Stage & Multi Stage DM Plants Mix Bed Demineraliser De-Gasifiers Cation Polisher Pharmaceutical Industry Power Plant Oil & Gas sector Chemical Industries Textile Industries Boilers feed water, Textiles, Pharmaceuticals, Chemicals, Breweries, Swimming pools, Potable Water, Hospitals, Automobile, and Battery    Advantages: Variety of cost effective standard models. Improved aesthetics and rugged design. User friendly, low maintenance and easy to install. Simpler distribution and collection systems. Quick availability. Pre-dispatch assembly check. The multi-port valves are top mounted as well as side mounted with the necessary high pressure rating PVC piping. Single valve operation as compared to the six valves in conventional filters Each operating step is clearly marked on the valve, thereby eliminating chances of error in the operating sequence. Single valve assembly, with its simplified frontal Piping, simpler distribution collecting systems is Very easy to install. Rust free Less power consumption Durable Economical    

state-of-the-art pre-engineered water treatment system, benefiting from decades of hands-on experience in clarification, filtration and disinfection hardware and software. The PACT ®  CWTP utilises high efficiency chemical and physical processes to achieve portable water standard TSS in a very compact foot-print. NOTE: Ranging from 10 to 300 cum/hr serving populations of 1200 to 36, 000 and multiplies with additional modules. COPE OF SUPPLY: Lift station (Option) Flocculation system either with motorised flash mix or static mixers and buffer plate. Lamella clarifiers includes weir plate, de-slugging system (manual or automatic) back-washing or cleaning system (manual or automatic) Media filtration with manual or automatic backwash system Vertical (FRP or MS) Horizontal (FRP or MS) Chemical Dosing System Pre-chlorination (Gas or NaOCI) Post- chlorination (Gas or NaOCI) Coagulant Dosing System Polymer Dosing System (Option) Buffer Cleared Water tank Pumping Station Filter feed Pump (1450/2900 RPM) S Body & impeller S Body with bronze impeller SS Body & impeller Backwash Pump (1450/2900 RPM) High Lift Pumps (1450/2900 RPM) S Body & impeller S Body with bronze impeller SS Body & impeller Air Scouring Air Blower MCC & PLC with HMI (Option) PACT CWTP ADVANTAGES: A modular concept allows for phased construction of water treatment plants and makes it adaptable to a wide range of sizes and flow rates Compact can be delivered as a containerised unit. This solution has such advantages as: factory installed and tested, no construction works on-site, short delivery period, easy to relocate. Lamella type setting media tested in hundreds of installation for setting efficiently and durability. Compact in size for minimum space required. Designed for minimum footprint Tested and perfected through dozens of installations worldwide

PACT® extended aeration  process offers certain benefits that can be combined with conventional processes to obtain a high quality effluent. Extended aeration agitates all incoming waste in the sludge from a single classifier. The combined sludge starts with a higher concentration of inert solids than typical secondary sludge and the longer mixing time required for digestion of primary solids in addition to dissolved organics produces aged sludge requiring greater mixing energy input per unit of waste oxidised. Sludge may be periodically removed by septic tank pumping trucks as sludge volume approaches storage capacity. PACT ®  EXTENDED AERATION ADVANTAGES: Extended Aeration process proves reliable under sufficient supervision. The end result effluent is of a higher quality than many other processes. Extended aeration processes are often better at handling organic loading and flow fluctuations, as there is a greater detention time for the nutrients to be assimilated by microbes. Extended aeration systems have a relatively low sludge yield due to long sludge ages, can be designed to provide nitrification. PACT ®  EXTENDED AERATION APPLICATIONS: Communities Schools Tourist facilities SAFF (THE SUBMERGED AEROBIC FIXED FILM) PACT® Submerged Aerobic Fixed Film (SAFF) process uses support media to retain an active biomass to reduce the in-fluent BOD Levels. Tubular diffusers are used with the SAFF media giving a good air dispersal and low level of blockage due to growth of biological film. SAFF reactor is a type of aerobic attached growth treatment process. Small foot print area, stable process, lesser sludge production and modular installations are the key features of SAFF process. Essentially SAFF system is a hybrid reactor where attached growth and suspended growth activity takes place simultaneously. PACT ®  SAFF ADVANTAGES: Can be designed to any size to deal with larger flow and loads. Modular design allows easy installation. The tank does not need to be drained for access to the diffusers or media. SAFF system takes higher shock loads without reducing the plant performance because of large quantity of Bio mass Available inside the reactor. SAFF supports low sludge generation, low Odour and low visual impact. Modular expandability & simple maintenance PACT ®  SAFF APPLICATIONS: Commercial Complex Residential Colonies Institutes

Grey water  is defined as waste water, collected separately from sewage flow that originates from clothes washer, bathtub, shower or sink, but not from a kitchen sink, dishwasher or toilet. Grey water is distinguished from “black water, ” which is waste water from toilets, kitchen sinks and dishwashers. Black water should not be reused in the home because of high risk of contamination by bacteria, viruses and pathogens.  As water is precious and a lot of water is wasted during flushing of toilets it is a waste to use drinking quality water for the same. This can be achieved by treating grey water. Also this treated water can be used for irrigation in some cases.  Grey water treatment is removal of unwanted suspended material from the grey water collected and disinfecting the same to make it useful for toilet flushing or irrigation or discharging to sewer lines according to the local laws applicable. PACT GWT ADVANTAGES: Lower fresh water use Less strain on failing septic tank or treatment plant Grey water treatment in topsoil is highly effective Ability to build in areas unsuitable for conventional treatment (compact) Less energy and chemical use Groundwater recharge Plant growth Reclamation of otherwise wasted nutrient WHY PACT® GREY WATER TREATMENT It is a compact treatment plant Occupies less space Most of the equipment are skid mounted Simple operation Aeration of raw water tank to avoid foul smell Customised design can be provided as per client’s requirement. PACT® GWT CAPACITIES: Grey Water system capacity can be of 5m3 to 150m3/days Customised designs can be provided as per client’s requirement It can cater to a variable range of population

PACT® Sequencing Batch Reactor  is a modification of activated sludge process which has been successfully used to treat municipal and industrial wastewater. The difference between a conventional technology and SBR is that the SBR performs equalisation, biological treatment and secondary clarification in a single tank using a times control sequence. It has been very useful in the areas where there is limited amount of space. PACT Sequencing Batch Reactor is a fill and draw activated sludge system. In this system, the waste water is added to a single batch reactor, treated to remove undesirable components and then discharged. There are five stages in the treatment process: fill, react, settle, decant, idle.  The inlet valve opens and the tank is being filled in, while mixing is provided by mechanical means (no air). This stage is also called the anoxic stage. Aeration of the mixed liquor is performed during the second stage by the use of fixed or floating mechanical pumps or by transferring air into fine bubble diffusers fixed to the floor of the tank. No aeration or mixing is provided in the third stage and the settling of suspended solids starts. During the fourth stage the outlet valve opens and the “clean” supernatant liquor exits the tank. The separate treatment of the nitrogen-rich return liquors from sludge treatment represents a special application, which allows increased overall nitrogen removal and a reduction in biological treatment stage loads. Nitrogen removal can be achieved either conventionally with an external substrate for denitrification or using the innovative Anammox process. ADVANTAGES OF PACT® SBR: Equalisation, primary clarification, biological treatment and secondary clarification can be achieved in a single reactor vessel. SBR requires small space. SBR has controllable react time and quiescent settling. Minimal footprint. High nutrient removal capabilities. The BOD removal efficiency is generally between 85- 90%. Filamentous growth elimination. A higher degree of operational flexibility with respect to effluent quality and dissolved oxygen (DO) controlled aeration system Proven treatment process capacity upgrades and phasing do not require modification or interruption of current treatment process Power consumption is typically less than that of a conventional plant with substantial power savings at lower flows PACT® SBR APPLICATIONS: Municipal wastewater including Biological Nutrient Removal Water recycle & reuse BOD & COD reduction Industrial Wastewater Food & Beverage Pulp & Paper Petrochemical & Oil refining Chemical/ CPI Landfill/ Leachate applications Textile Industry

PACT® Ultra Filtration (UF)  involves pressure-driven separation of materials from a feed solution.  Ultra filtration membrane productivity is high, while pressure differences remain low. Ultra filtration can be applied in cross-flow or dead-end mode and are commercially available in tubular, hollow-fiber, plate and frame, and spiral wound configurations. PACT® Ultra filtration (UF) utilises a semi-permeable membrane to physically remove suspended particles from water based on particle size and the pore size rating of the UF membrane. Suspended solids and solutes of high molecular weight are retained in the so-called retentate, while water and low molecular weight solutes pass through the membrane in the permeate (filtrate). Among membrane technologies commonly used, UF is typically one step tighter with smaller pore size than micro filtration. Ultra filtration is not fundamentally different from micro-filtration, both of them separate based on size exclusion or particle capture. Membranes tighter than UF are Nano-filters and reverse osmosis.  UF membranes have pore sizes of approx. 0.005-0.05 micron. They facilitate the removal of molecules with higher molecular weights (e.g. proteins), while allowing dissolved ions and molecules with low molecular weights to pass which means that UF membranes can capture all microbes and bacteria, and also viruses. Due to difficulty in removing very small particles using conventional water treatment, and increased concerns about chlorine-resistant organisms, ultra filtration is increasingly becoming the method of choice for municipal water treatment plants. Ultra filtration is achieving importance in the wastewater treatment sector. Ultra filtration is also used as a safe pre-treatment prior to reverse osmosis. PACT® Ultra filtration is very effective at removing tiny particles which can quickly foul reverse osmosis membranes, thus reducing the silt density index of the water. For this reason, it is frequently used as pre-treatment for surface water, seawater, and treated waste water upstream of RO. Ultra filtration eliminates the extreme sensitivity of conventional plant treatment steps of coagulation, sedimentation and filtration to variable in fluent turbidities and particle charges. UF is also used in industry to separate suspended solids from solution. Industrial applications include power plants, petrochemical and chemical plants, Oil and Gas, pharmaceutical.