Bio-wastewater Processing .

Removal of BOD, COD and TOC


The process is based on the following three stages:

-       1st Stage using Nano Membrane Technology (NMT) producing 75 % permeate (cleaned water) and 25 % rejected concentrate. (Please see the below brochure)

-       2nd Stage is a more Efficient Nano Membrane Technology (ENMT) for treating the rejected concentrate from 1st Stage containing high amount (up to 200,000 ppm) of honey/sugar etc.  This stage produces >85 % reusable permeate and 15 % rejected concentrate. The process procedure and operating costs are about the same as the 1st Stage operation but its elements, membrane housings, design and construction are quite different.

-       3rd Stage is for processing the concentrate from the 2nd Stage, containing higher concentration and all the solids. This stage separates the solids and produces a kind of syrup containing the remaining sugar/honey, etc.

Depending on each specific case, a combination of  Stages will be selected i.e. 1st Stage or (1st  and 2nd Stages) or (1st , 2nd and 3rd Stages).

Note:  Using ENMT systems for processing the entire wastewater, the cost of the systems per m3 wastewater ($/m3) would be too expensive and not economical if the produced reusable water is not needed. The benefit of using ENMT is for saving the cost of concentrate disposal and disposal tank and also producing reusable water. 


​Removal of BOD, COD and TOC

​​Conventional Processes:​ Removal of Biological Oxygen Demand (BOD), Carbon Oxygen Demand (COD) and Total Organic Carbon (TOC) using a biological treatment process - such as Moving Bed Bioreactor (MBBR) or Membrane Bioreactor (MBR) - would be likely to substantially reduce the BOD present in the wastewater. Considering that the capital and operational costs of biological treatment is quite high has led to another option of a membrane filtration process.​
Membrane Filtration Process:  An initial step with a pilot system, using a specialized membrane, indicated the possibility of recovery of a large portion of clean water. This resulted in special membranes to be developed for this process, effective for removal of 95% of the organic compounds present in such wastewater. Greater than 90% recovery of permeate (clean water) with greater than 94% organics removal (i.e. sugars and other organics) can be achieved with relatively low pressure (i.e. 150 psi- 1034 kPa).
The newly developed process systems for removal of BOD, COD, and TOC of biological wastewaters is based on specialized membrane filtration at various pressures and concentrations.
The outline below relates to honey wastewater produced from washing storage tanks, containing sugar and other organic residues. The water exhibited a strong odor characteristic of bacterial action, in particular a significant percentage of anaerobic bacterial action.
The membranes selected for such treatment are specialized effective membranes which provide around 95% rejection of the organics in the wastewater, and greater than 80% of a minimal quantity of salts ( i.e. NaCl, CaCl2). The recovery rate of clean water can be expected to reach at least 90%.
Operating costs consist of electrical power cost of about 0.8 kwh/m3 of influent wastewater, and an additional power cost of a lesser amount than that for the other pumps and equipment in the system. The total operating cost will also include a small portion for membrane cleaning chemicals and associated labor costs.
The measurement of the TOC of the influent for this process, indicated at least a factor of 3 lower organics (i.e. 1970 mg/L instead 7300 mg/L). By processing the wastewater from the second trail, the conductivity of permeate and concentrate demonstrated a further improvement in the percentage  recovery and reduction in permeate contaminant concentration
TOC measurements on the permeate produced from the two most effective membranes  demonstrate that the  rejection efficiency  was between 85 %  and 95% for a single pass through a single membrane. Even a single pass through a single membrane provides a ~95% rejection efficiency. This is less than 5% of the concentration of organics present in the influent.  At 196 psi (1350 kPa) inlet pressure, with multiple membranes to further purify the concentrate, the actual average rejection efficiency is expected to be close to 98% for permeate. This can be further improved if a higher pressure than the 196 psi  is used. With slightly higher power cost for the use of higher pressure (inlet pressure of 225-250 psi) will result in a higher rejection efficiency. Therefore, when employing such a treatment system is operated in the range of 225-250 psi,to provide superior recovery and rejection of contaminants.
​The above special membrane filtration process can be effectively applied for wastewater streams from manufacturing processes that contain predominantly sugar and related organics. such a separation process will significantly reduce the overal BOD load rate. Depending on the regulatory requirements, in some cases, two pass membrane filtration may be necessary. In more complicated complex wastewater, after membrane separation, permeate will be treated further together with other wastewater streams using the processes verified by pilot testing to meet and exceed the required standards. 
For verification of feasibility and capital cost of the treatment processes and related systems, please send us more information about the source of produced bio-wastewater and the chracteristics of each wastewater srteam preferably the laboratory analysis. 

 For more complicated complex wastewater a pilot testing is recommended 


Example of Water Treatment System

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Example of Membrane Systems

Example of Wastewater Treatment System

Nano Technology for SAGD + Blowdown Water & Process Water

  • Low Capital Expenditure (CAPEX) 
  • Low Operating Cost (OPEX)
  • Increased/Enhanced Flow Rate
  • Specializing in Custom Built Design Systems

Potable Water Production, Wastewater Treatment, Bio-wastewater processing

Steam Assisted Gravity Drainage (SAGD)   

  • Recycle, Reuse
  • Low CAPEX
  • Elminate lime softener
  • Eliminate WLS or HLS/ evaporators


Frac Flow Back

  • Recycle, Reuse
  • Easily moved
  • Simple setup and tear down
  • Low power consumption


Process Water

  • Recycle, Reuse
  • Low OPEX
  • Small footprint
  • Reliable, easy to maintain


                                       

                                               

Water processing Division has the task of supply of systems and facilities for potable water production and wastewater treatment. The Technologies used with their systems, include different kinds and types of membranes for case specific applications.


The membrane systems are designed to use water from different common sources for production of potable water.


The major sources for producing potable water are:

  • Sea water;
  • River water;
  • Brackish water;
  • Etc.


​Wastewater Treatment

 Some of the major wastewater sources are:

  • Oil production facilities;
  • Steam Assisted Gravity Drainage (SAGD);
  • Natural gas wells Frac Flow back water;
  • Disposal wastewater ponds/tanks;
  • Blowdown water;
  • Industrial wastewater;
  • Honey & Syrup wastewater 
  • Etc.


The treated Wastewater then meets and exceeds the standards for Alberta, Canada and internationally. The treated wastewater thereby becomes a reusable resource for operators.

The provided water treatment systems and facilities are effective and proven for different small to large scale capacities of oil & gas exploration and production (E&P) companies.


The significant advantages of the technology, its systems, facilities and operations are:

  • Low Capital Expenditure (CAPEX)
  • The low Operating Expense (OPEX)


Other current Industry technologies (i.e. electro coagulation, thermal distillation, crystallization), result in higher energy consumption and are more expensive in both CAPEX and OPEX .

Industrial Systems & Innovative Technologieschnologies