Laboratory testing of the microbiological product

Abstract

The aim of the Thesis work was to test in laboratory microbiological product developed by the contractor Kopli Oy. For the test, two different products were prepared by the contractor Kopli Oy, applying contractor’s recipe. This recipe is developed by contractor and not to be described in this work. The products are named in the study as “solid product” and “liquid product”

According to Kopli Oy, both products are developed for production of liquid fertilizer from biowaste on household level. Biowaste is treated applying the product and after several weeks rich on nutrients liquid is produced. The liquid can be diluted and used as a fertilizer for food production or for watering the garden plants.

The laboratory experiment was done in TAMK’s laboratory to test product’s ability to produce fertilizer in liquid form. Biowaste from TAMK’s kitchen were treated with tested products in custom reactors. Duration of the treatment was five weeks, during this period, liquid samples from the reactors were taken, as well as sensory observations and temperature measurements were done. Liquid from the reactors was analysed to determine tot N, P, K concentrations, pH and conductivity. When samples were analysed, it was found that total nitrogen content of the liquid from reactor with tested solid product fluctuated over testing period and was 2.8 g/L – 3.5 g/L; total phosphorus fluctuation was 1,3 g/L - 1,7 g/L; total potassium fluctuation was 2,8 g/L - 3,8 g/L.