PROVARKO SYSTEM – SCALABLE TECHNOLOGY

Provarko builds Anaerobic Digester systems to convert animal, organic, trade, and food waste into Biofuel and Biofertiliser. Food waste deposited into Anaerobic Digester systems boosts biogas production and increases electricity revenues.

Provarko’s digester system can be modular, you do not need to start with a full anaerobic digester system, Genset, and heat recovery.  We can build it in an affordable system in stages if required.

One of the many benefits of the Provarko system is, it will be built as part of a complete system, so it can be added onto without re-engineering what has already been built.

THE STORAGE TANK

The storage tank will be constructed the same as the anaerobic digester tank. 75mm laminated timber planks on a 300mm insulated concrete foundation designed on sand to slide in the event of earthquake.

12mm wire ropes and heavy steel angle at the base will anchor the structure down in case of earthquake of flood.

If you need a roof, we can install a long-lasting membrane roof supported by a centre structure and affixed to the tank using the same system as a future bio dome will be.

Central draining sump for cleaning out and wall mounted stirrers can all be fitted; these units will be part of any future anaerobic digester system.

Electrical and fluid conduits will be laid in the concrete foundation for future use if required.

These tanks will be built to very high quality, the laminated timber construction and concrete foundation are class leading and very robust.

THE PROVARKO DIGESTER

The anaerobic digester tank will be constructed from 75mm laminated timber planks on a 300mm insulated concrete foundation designed on sand to slide in the event of earthquake.

12mm wire ropes and heavy steel angle at the base will anchor the structure down in case of earthquake of flood.

A centre structure will support the top shape of the tank as well as support the bio membrane gas dome.

Central draining sump for cleaning out and wall mounted stirrers will all be fitted, a staircase and platform, effluent influent system and digestate outflow system, all electronics and heat transfer systems will be added as required.

THE PROVARKO GENSET

The combined heat and power unit.

This is a complete unit that will turn the methane that comes from the digester tank into heat and electricity.

Depending on the system, an engine of between 15 and 55 litres capacity will run on the methane after it has been cleaned by the gas scrubber. This engine will turn an electrical generator to make electricity.

There is heat a recovery system built in that will collect all possible heat from the engine water jacket and heat from the exhaust system and use to warm the digester tank to the required temperature as well as make a vast amount of hot water if required.

This unit also has an integrated computer control system that will either locally or remotely control the entire digester system.

THE PROVARKO SCREW PRESS

At Provarko we understand that some farmers will want to irrigate the liquid directly to the fields with the current irrigation system.

We can install a screw press that will effectively remove all the solids from the digestate and leave a liquid that can be pumped through an irrigation system. This has many uses to the farmer and other industries and can be sold and as complete manure.

  1. The solid can be bagged and sold to garden centres as a weed seed free compost or manure.
  2. It can be applied to cultivated fields with a muck spreader.
  3. It can be used as an excellent pathogen free bedding for barn cows and goats.
  4. It can be used as a pathogen free litter for chickens to be raised on, which would be put back through the digester once it is collected and re processed.

THE PROVARKO FARM LINK / CO-DIGESTER

We understand that these systems can be a substantial investment and many New Zealand farms will not have enough effluent and other organic matters to sufficiently feed a digester of a reasonable size.

Provarko has a solution for this. We build one system and with the use of a tractor and tanker, specifically built in Canada for our New Zealand transport and heavyweight road limits, we can retrieve the effluent from neighbouring farms and bring it to the digester for processing and return it once it has been processed.  There are many advantages!

  1. Multiple farms can use this environmentally superior natural organic manure.
  2. We can build a digester system big enough to produce electricity in a microgrid to feed several farms.
  3. Different farms that milk at different times will ensure the year-round operation of the digester.
  4. Once the Digestate is taken back to the original farm, it can be applied directly to the field.
  5. There is a larger pool of money available to ensure an effective operation, as several farms will no longer need to purchase electricity from the grid, nor fertilizer from the current suppliers of Petrol-based synthetic fertilizer.

THE PROVARKO POND HEALTH SYSTEM

Provarko understands that the effluent holding pond will need to be kept in good health. Therefore we have partnered with a company in Canada to provide world-leading and highly efficient pond stirring systems.

  1. Provarko can provide powerful 3 phase stationary pond stirring systems
  2. Provarko can provide tractor-mounted hi-flow pumps up to 45,000 litres per minute.
  3. Provarko can supply pond crawlers to creep around the pond and break up all the sludge crust into a smooth effluent that can be pumped into a tanker for transportation to the digestion plant.
  4. Provarko can provide an automated connection system that does not require the tractor driver to leave the cab of the tractor when filling and discharging the tanker at the pond, or at the digester plant.