AQVA SAFE VISION FAQ's

Water Treament FAQ's?

Human health protection

  • Pathogens
  • Chemicals

Environmental Protection

  • BOD and COD
  • Nutrients (e.g., N and P)
  • Metals
  • Endocrine disrupting compounds (EDCs), pharmaceuticals, and personal care products (PPCP)

Recover useful products

  • Water (grey water, aquifer recharge, potable water)
  • Treatment chemicals (e.g., lime)
  • Energy (e.g., methane and hydrogen)
  • Fertilizer

The removal of dissolved and particulate biological oxygen demand (BOD) and the stabilization of organic matter present in water can be achieved biologically using variety of microorganisms. They are responsible to oxidize the dissolved and particulate carbonaceous organic matter to mineral constituents of CO2 and H2O, and additional biomass.

v1 (organic material) + v2O2 + v3NH3 + v4PO43- → v5 (new cells) + v6CO2 + v7H2O

 Where vi= the stochiometric coefficient

BOD: biological oxygen demand (BOD) is the amount of oxygen required by aerobic biological microorganisms to decompose organic material in a given water at certain temperature over a time period.

COD: chemical oxygen demand (COD) is a measurement of the oxygen required to oxidize soluble and particulate organic matter in water using a strong oxidizing agent.

COD values are always greater than BOD values because COD captures both biodegradable and nonbiodegradable substances, whereas BOD only entails biodegradable ones.

Nitrification: The two-step biological process by which ammonium (NH4+) is converted first to nitrite (NO2-) and then to nitrate (NO3-).

Denitrification: the biological process by which ammonia (NO3-) is converted to nitrogen (N2) and other gaseous end products. 

All the sewage is collected through wastewater collection systems (combined or separate sewer), from which it is transferred to wastewater treatment plants (WWTP).

Nitrification: The two-step biological process by which ammonium (NH4+) is converted first to nitrite (NO2-) and then to nitrate (NO3-).

Denitrification: the biological process by which ammonia (NO3-) is converted to nitrogen (N2) and other gaseous end products. 

The new century presents new technical and economic demands upon water treatment engineers for water treatment, wastewater treatment and water purification. Aqva Safe Vision continuously searches for better answers for its clients. The wide array and complexity of water problems require new skills and multi-discipline expertise to achieve the best results. Aqva Safe Vision serves a variety of clients’ needs with water treatment and water purification equipment, each with specific goals, and Pure Aqua has drawn upon its extensive range application experiences to optimize and innovate design solutions.

Aqva Safe Vision manufactures a full line of seawater desalination systems designed for heavy or continuous duty service in the marine applications where quality and dependable performance are keys. 

Our standard Brackish Water Reverse Osmosis systems are available with capacities ranging from 250 GPD to 600,000 GPD, and our standard Seawater Reverse Osmosis systems or water makers or RO desalination systems are available with capacities ranging from 380 GPD to 264,000 GPD. Aqva Safe Vision is also capable of manufacturing custom built Reverse Osmosis plants

The cleaning skid is designed for manual operation through a local control box located on the skid. A chemical storage tank is mounted on its own stand and connected to the skid with either hard PVC piping or quick disconnect fittings and flexible hoses. This gives the unit the ability to be mounted in a permanent location or totally portable if desired. The piping is schedule 80 PVC that is hydrostatically tested at the factory. The electrical enclosure is NEMA 4X. All skid wiring is completed and tested before shipment

The way water softeners work is by removing hardness causing ions such as calcium and magnesium from the water through an exchange process of sodium ions. After this exchange process is completed, the water softener system goes through a regeneration process that flushes out unneeded ions until they are fully replenished with incoming sodium ions. Since these systems utilize approximately 25 gallons of water each day,

There are mainly two (2) wastewater sources: 1) domestic sewage, and 2) non-sewage. Domestic sewage includes all wastewater generated by residential communities, public restrooms, hotels, golf courses, restaurants, schools, hospitals and other health centers. Non-sewage wastewater entails industrial wastewater, stormwater, runoff, water from swimming pools, car garages, and cleaning centers.

The composition of wastewater is a function of its source. Domestic sewage/municipal wastewater is typically comprised of pathogenic microorganisms, biodegradable organics, nutrients (such as nitrogen and phosphorous), suspended solids, and may contain toxic compounds that may be carcinogenic.Industrial wastewater usually contains higher organic concentrations (e.g., BOD, COD, TOC, etc), heavy metals, and suspended solids. 

The composition of wastewater is a function of its source. Domestic sewage/municipal wastewater is typically comprised of pathogenic microorganisms, biodegradable organics, nutrients (such as nitrogen and phosphorous), suspended solids, and may contain toxic compounds that may be carcinogenic.Industrial wastewater usually contains higher organic concentrations (e.g., BOD, COD, TOC, etc), heavy metals, and suspended solids. 

All the sewage is collected through wastewater collection systems (combined or separate sewer), from which it is transferred to wastewater treatment plants (WWTP).

In suspended-growth processes microorganisms are maintained in suspension within the liquid, whereas is attached-growth processes (i.e., fixed-film processes) microorganisms are attached to some inert medium, such as rocks, slag, or specific ceramic or plastic materials.

Substrate denotes the organic matter (e.g., carbonaceous organic matter) or nutrient that are converted during bio-treatment or that may be limiting biological treatment.

SRT is the average time the activated sludge solids are in the system. The SRT is an important design and operating parameter for the activated sludge processes.

In an MBR system, no solids can pass through the membrane and hence the SRT is defined only by wasted solids. The SRT can be controlled by periodically discharge some of the solids (sludge) from the process.

Fouling propensity of the membranes is evaluated through monitoring pressure drop across the membranes, which is referred to as transmembrane pressure (TMP), and recovery rate. High TMP values and low recovery rate indicate that membranes are fouled and need to undergo cleaning.

Removal of wastewater constituents such as rags, sticks, floatables, grit, and grease that may cause maintenance or operational problems with the treatment operations, processes, and ancillary systems.

Removal of a portion of the suspended solids and organic matter from the wastewater.

What is water treament

The new century presents new technical and economic demands upon water treatment engineers for water treatment, wastewater treatment and water purification. Aqva Safe Vision continuously searches for better answers for its clients. The wide array and complexity of water problems require new skills and multi-discipline expertise to achieve the best results. Aqva Safe Vision serves a variety of clients’ needs with water treatment and water purification equipment, each with specific goals, and Pure Aqua has drawn upon its extensive range application experiences to optimize and innovate design solutions.

What is a typical sludge treatment method?

Typically, anaerobic digestion (methanogenic treatment) is being implemented for sludge treatment. This can be performed under two different temperature conditions:

  • Mesophilic (about 35°C)

  • Thermophilic (50-60°C)

It is critical to control the pH between 6.5 to 7.5 (for methanogens). The purpose of sludge treatment is to reduce the volume of waste activated sludge (WAS) for disposed. The process can generate both desirable gases (e.g., CH4) and undesirable gases (e.g., H2S).

What are anoxic processes?

The process by which the nitrate (NO3-) nitrogen is converted biologically to nitrogen gas in the absence of oxygen (i.e., denitrification).

What does nitrification and denitrification refer to?

Nitrification: The two-step biological process by which ammonium (NH4+) is converted first to nitrite (NO2-) and then to nitrate (NO3-).

Denitrification: the biological process by which ammonia (NO3-) is converted to nitrogen (N2) and other gaseous end products. 

What are anoxic processes?

The process by which the nitrate (NO3-) nitrogen is converted biologically to nitrogen gas in the absence of oxygen (i.e., denitrification).

What is biological wastewater treatment?

The removal of dissolved and particulate biological oxygen demand (BOD) and the stabilization of organic matter present in water can be achieved biologically using variety of microorganisms. They are responsible to oxidize the dissolved and particulate carbonaceous organic matter to mineral constituents of CO2 and H2O, and additional biomass.

v1 (organic material) + v2O2 + v3NH3 + v4PO43- → v5 (new cells) + v6CO2 + v7H2O

 Where vi= the stochiometric coefficient