Production of fertilizers and other recoverable products

Fertilizers are substances added to soil to improve arable products production. Natural fertilizers such as animal manure have been used for centuries to assist cultivation. Synthetic fertilizers are normally combinations of Nitrogen, Potassium and Phosphorous, normally abbreviated to N, K & P. However, the sources of these rare materials, particularly Phosphorus, continues to diminish. Therefore, companies are looking to areas such as industrial fertilizers as viable alternatives.

Industrial Fertilizers come from a variety of sources, examples where Condorchem Envitech have provided solutions include:

  • Livestock waste – As restrictions increase due to potential leachate and the amount of land available for land-spreading diminishes, an increasing number of sites now control the amount of waste such as poultry manure or livestock slurry, it is becoming more common to see Bio-Digestors on sites these utilize the initial waste to produce a Bio-gas, they then also discharge a nutrient rich liquid fraction.
  • Sewage Sludge – It has been found that sewage sludges contain many of the nutrients that are needed for a good fertilizer. However, it is also known that many sludges from this sources can contain unwanted contaminant’s such as lead, cadmium and even mercury.

As in all our work, Condorchem Envitech works with the client to initially assess the identified waste-stream to evaluate the potential of the industrial fertilizer. Samples can be sent to our laboratory for a full analytical assessment, from this our technical team will work with the client to put together a cost effective programme to gain the maximum potential from the fertilizer produced.

To obtain a viable fertilizer, Condorchem Envitech take each project on a case by case basis, generally the technologies involve include separation and concentration, these include:

  • Membrane Concentration – Membrane Concentration is a thermal process in which only vapour molecules can pass through a hydrophobic membrane. The driving force for the separation is the vapour pressure and not the total pressure, as with reverse osmosis. Increasing the temperature of the feed increases the vapour pressure and therefore the vapour pressure gradient, which is the driving force. Whilst a concentrated liquid is produced from this process which might be suitable as a Fertilizer, the Membrane might also be the first stage in the treatment process.
  • Vacuum Evaporation – Vacuum Evaporators are one of the most innovative and efficient technologies for industrial water-based liquid waste minimization and treatment. This is a clean, safe and very versatile technology with low management costs, and in most cases, also serves as a zero liquid discharge treatment system. As with the Membrane systems, the Evaporator whilst producing a concentrated liquid can be further processed to a powder with crystallization.
  • Thermal Energy Production – Thermal Energy Production use to be seen as demanding high feed input to substance a system. Condorchem Envitech have successfully worked on systems where even with low feed-stock, if the calorific value of the material is sufficient then a cost effective solution can be provided, usually providing enough energy generation to supply in-house low cost energy.

For further information on how Condorchem Envitech can work with you to provide a cost-effective solution, please complete the enquiry form below and we will be in touch shortly.