Company Solutions

SECONDARY WASTEWATER TREATMENT

TERTIARY WASTEWATER TREATMENT

GASES AND ODOR CONTROL

SLUDGE & SOLID WASTE TREATMENT AND DISPOSAL

  • AG-BAG
  • COMPOSTER

CARBON CAPTURE AND CDM PROGRAMS

BIOGAS & ANAEROBIC SYSTEMS

ENVIRONMENTAL MANAGEMENT & HABITATS SUSTAINABILITY
  • PROECO
  • BIO-BARRIERS

RENEWABLE ENERGIES & BIOFUELS

  • FERMATEC
  • MWG
  • BD-FLASH
  • BIFLUX
  • CONTIZYM
  • TRIVAC

Greenline

TECHNICAL DESCRIPTION INCLUDING THE STATE OF DEVELOPMENT.

GREENLINE DESCRIPTION OF THE TECHNOLOGY/ SOLUTION INCLUDING ITS INNOVATION ASPECTS:

 

Valorsabio
Valorsabio
Valorsabio
Valorsabio  
Valorsabio  
Valorsabio  
Valorsabio  
     
GREENLINE - Chinese: Mandarin translation  
     
 

The GREENLINE is a photoreactor based on the author (1) acronym LMMP (Linear Matrix Multicellular Photoreactor), now a widely used terminology among scientific community.

Valorsabio

 

The actual process/ technology was under WIPO patent pending nº : WO2008010737A1, and the inventor is Antonio Manuel Cardoso Marques Ferreira, the actual owner and CEO of VALORSABIO, Lda.

The GREENLINE is a solution to grow microalgae and uses for the case transparent and vertical tubes. The tubes are set in rows and interconnected by collectors at the ends (top and bottom collectors). The solution uses several rows in series in order to achieve: 1) the required efficiency for a specific microalgae growing and corresponding effect; 2) for collecting as must light as possible using the less possible optimized foot print.

The GREENLINE best application is at wastewater treatment combined with CO2 capture / emissions reduction. The invention was designed from 1998, and the innovation final prototype was tested during several consecutive months (from May 2006, until January 07 and from March 07, until December 07) , in an almost non-stop testing, to test and certify is behavior and respective stress results, even in the winter time, with lower temperatures and less light.

Valorsabio  
valorsabio
Fig1 & 2 . GREENLINE Model and LMMP demonstration pilot for 5 m3/day raw wastewater.

The GREENLINE include also a feeding pump for raw wastewater feed and a centrifugal recirculation pump that returns the final treated wastewater with the microalgae culture, to the initial point of feeding. The objective for this recirculation action is to: 1) lower the inlet wastewater NTU (turbidity) , and 2) allow for a more complete mixture / turbulence in the circulation wastewater.
The system includes sensors for light detection, pH, temperature and Oxygen contents in the water.

The GREENLINE includes also a tank for mixing the return water with the raw wastewater and also a final pre-clarification tank for the microalgae recovery.
On the top of the collectors, are installed valves for oxygen purge/ release as gas.
The transparent tubes in the demonstration solution were produces in PET (Poly Ethyl Terephthalate), the same grade PET used in water bottling.
The PET proves to be a very good resistant plastic, able to resist both the UV long term exposition and to handle the changes in pH, from the collectors were made in stainless steel (SS AISI 304) and the gaskets / flanges that connect the tubes to the collectors were built in Butadiene Rubber.

The GREENLINE combines several very advanced parts:

  • A) The microbiological understanding related with the microalgae growing process is on the center of the innovation. The GREENLINE can grow microalgae, at a fast rate and great efficiency, using a combination of turbulent flow, vertical path and transient light/ shade. This unique process demonstrated that it is possible to lower the wastewater hydraulic retention time to a low level as only 3 hours, without compromising the treated water parameters.
  • B) The correct dimensioning for the specs and detailed engineering for the GREENLINE are now at our competence, as a result of the long term evolution and demonstration tests. From the materials used up to the kinetics, the process in now understood up to a level that is well above the competitors.
  • C) The use of recycled materials such as PET from water bottles and rubber from used tires, inscribes the GREENLINE in the sustainable and environmental friendly economy.
  • D) The configuration in vertical path demonstrates to be at once simple but unbeatable. Together with the low foot print involved, it becomes demonstrated that this innovative solution achieves the very best CO2 and organic loads handling capacities.

GREENLINE PREPARATORY RESEARCH & PREVIOUS TESTS IN REAL APPLICATIONS AND RESPECTIVE RESULTS.

The backgound GREENLINE was the launching of the EC project INCO-MED 2: MEDUSA WATER: ICA3- CT-1999- 00010, started in March 2000. CORDIS information

At that stage, the LMMP new concept was to develop “A new system of Linear Matrix Multicellular Photo reactors (LMMP) using micro algae cultures for the treatment of the final effluent .......... to be designed, constructed and tested in site. This innovative process intend to achieve an adaptation of the technology to the specific environmental conditions of the regions involved, which will be very low energy consuming and consequently with high economic benefits"

valorsabio  
valorsabio
Fig. 3– LMMP – 7L Prototypes installed at INETI laboratories, during INCO-2 Medusa Water Project. Table annex: the very first LMMP results

The LMMP very first tests in 2000-2004, confirmed the unique capacity for the solution to combine the secondary and tertiary treatments. The experiments were conducted in very small prototypes, and the used path was the horizontal type. In any case, it was immediately demonstrated that the solution was able to reduce simultaneously the COD and N & P, using only the natural sun light, instead of the conventional bacteria solutions using aeration devices.

 

valorsabio   valorsabio
     
     
valorsabio
 
valorsabio
Fig 4: Graphics: the COD, BOD, N and P in effluents and output from the system.

From the very first days, the results observed were well above the expected. The LMMP conceptual design was a winning solution, top race equipment for the demanding wastewater market and the new CO2 capture business. The long way, since 2000, was finally at the most expected and desired point. Some of the data recovered in the tests performed during 2006/ 2007 is resumed in the graphics shown.

The actual state of art of the GREENLINE is the uniqueness simple design. It includes now a storage flexible tank for the night hours (optional) and a final sand filter after a lamellar decanter, for total suspended solid reduction.

These improvements will target zero untreated discharge, zero VOC / CO2 emissions and total recovery of microalgae.
The treated wastewater will have the same quality as river water, thus, it is under the limits for reuse in many situations, from agriculture, washing uses, nap groundwater recharge, water for sanitary purposes, industrial cooling water, etc.
With further filtrations / disinfection, the water can be reused in general applications.

GREENLINE PREPARATORY RESEARCH & PREVIOUS TESTS IN REAL APPLICATIONS AND RESPECTIVE RESULTS.

The actual market has no competitor for GREENLINE.

The first really similar photoreactor found in the web search is http://www.hugg.com/taxonomy/term/1070 referring Tecnia's publications in 2007. In the University sector was found also: http://www.egr.uri.edu/research/Expertise-Index/PhotoreactorsBarnett.htm

In general, no LMMP solution is in commercial market for application to wastewater treatment and CO2 combined sequestration.
The web publications are all about or related with academic research and thus are in the initial stages of development, thus very far from market access.

GREENLINE FIELDS OF APPLICATIONS.

The solution can be applied for general Tertiary wastewater treatment, where Nitrogen and Phosphorous removal are essential.
In addition to nutrients removal, the reducing and elimination of residual COD and BOD5 are in the capacities of the solution.
The GREENLINE can also be applied for specific cases, such as heavy metals removal and recalcitrant chemicals removal.
Several sectors are under the GREENLINE best application, such as the fish and shrimp ponds production, agro-industry wastewater treatment polishing, microalgae production, etc.
The GREENLINE can be used for carbon dioxide sequestration and for microalgae production for biodiesel.