About Aquatech
A group of environmental engineers and pollution control consultants working dedicatedly to support green and sustainable industrial growth.
Environmental Pioneers
Aquatech Engineers started its journey in 2001 with various products to handle water for industrial applications. Due to increasing national awareness for protecting the environment, the company shifted emphasis to industrial water pollution prevention and control.
In 2011, the firm took the shape of a private limited company, becoming **Aquatech Engineers Ltd**. Today, we cover the entire spectrum of industrial units, providing case-specific turnkey solutions for effluent treatment plants, water treatment, salt recovery, and air ventilation.
The Water Cycle We Engineer
Click or tap on any equipment block in the flowchart below to inspect flow meters, sensor outputs, and detailed engineering processes.
Raw Intake Basin
Surface & Process Water IntakeMulti-Media Filter
Coarse & Fine Filtration bedsReverse Osmosis Membrane
High-Pressure Membrane DesalinationPure Storage Dome
Ultra-pure Reservoir & BalancingSCADA Telemetry Monitor
Online QA & Discharge complianceRaw Intake Basin
Surface & Process Water IntakeCapturing wastewater, ground water, or industrial chemical effluents. Features automated screen grids to filter out debris and initial pH buffering channels.
Filtration and Processing Protocols
Coarse screen filtering
Turbidity monitoring
pH pre-balancing
Industrial Water Loop: Engineering Process Breakdown
01Raw Influent Intake & Coarse Screening
The purification circuit initiates at the raw wastewater or groundwater influent headers. Submersible raw lift pumps extract feed fluid through mechanical screening racks, intercepting macro-particulates (diameter > 10mm) to prevent downstream pump impeller abrasion.
To optimize downstream coagulation/flocculation kinetics, high-precision chemical metering skids inject buffering solutions (such as Sodium Carbonate) and inorganic coagulants (like Polyaluminum Chloride). The blended liquor is then fed into hydraulic equalization basins, neutralizing peak Chemical Oxygen Demand (COD) surges and establishing uniform volumetric flow rates.
02Pressurized Multi-Media Depth Filtration
Buffered liquor is pumped under positive pressure into specialized vertical steel filter columns. The process utilizes depth filtration beds containing gradated media layers: high-density anthracite coal caps trap larger biological flocs, while fine silica sand and gravel support beds remove fine microscopic turbidities and suspended solids.
The water then enters high-capacity Granular Activated Carbon (GAC) adsorber columns, where dissolved toxic organic micropollutants, heavy dyestuff residuals, and chlorine compounds are trapped on the porous carbon surface area via physical adsorption.
03High-Pressure Reverse Osmosis Desalination
De-chlorinated permeate is pumped through a 5-micron absolute cartridge safety pre-filter to catch any escaping carbon fines. Next, multi-stage high-pressure centrifugal pumps force the feed water (operating at pressures of 15 to 20 Bar) into spiral-wound thin-film composite (TFC) polyamide membrane elements.
Under cross-flow hydraulic pressure, pure water molecules pass through the sub-nanometer semi-permeable membrane pores to form the high-purity permeate stream, while 99.2%+ of multivalent ions, heavy metals, and refractory compounds are rejected into the concentrated reject brine stream.
04Buffer Storage & Germicidal UV Sterilization
Treated high-purity permeate is gravity-drained into food-grade stainless steel dome-topped buffer storage reservoirs, neutralizing volumetric fluctuations between generation and industrial process demand.
Prior to discharge or loop distribution, the water is pumped through closed-vessel ultraviolet (UV) disinfection chambers. Delivering electromagnetic germicidal irradiation at 254 nm wavelength, the UV photons disintegrate the DNA/RNA structures of pathogens, ensuring microbiological sterility without introducing chemical biocides.
05Continuous Telemetry & SCADA Quality Assurance
System verification and environmental compliance monitoring occur at the final discharge weir. A series of online analytical sensors continuously measure critical effluent parameters: Chemical Oxygen Demand (COD), pH, Total Dissolved Solids (TDS), and temperature.
Sensor signals are integrated into a central Programmable Logic Controller (PLC) and transmitted via cellular telemetry to state Department of Environment (DoE) servers. Automated pneumatic bypass valves instantly redirect off-spec effluent back to the raw equalization basin if discharge parameters exceed regulatory thresholds.
Our Journey
The Foundation
Started as “AQUATECH ENGINEERS” with a vision to support clean and green environment by delivering specialized water treatment chemicals and minor filtration units.
Incorporation
Officially incorporated as a private limited company: “Aquatech Engineers Ltd”. Shifted operational focus entirely towards heavy-duty industrial turnkey ETP designs and mechanical installations.
Future-Ready Sustainability
Pioneering Zero Liquid Discharge (ZLD) systems, smart IoT telemetry monitoring, and advanced Salt Recovery Plants (SRP) in heavy industrial parks across Bangladesh.
Quality Policy
It is our endeavor to provide technically feasible and economically viable solutions in environmental engineering, pollution control, and other engineering disciplines which satisfy customers' requirements as well as statutory and regulatory regulations. We continually improve all processes by providing ongoing training and technology upgrades to all employees.