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Preliminary Study on the Use of Lactic Acid Fermentation in Terra Preta Sanitation

Research Paper | June 1, 2022

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Horacio Factura

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Int. J. Biosci.20( 6), 216-220, June 2022

DOI: http://dx.doi.org/10.12692/ijb/20.6.216-220


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The acidic state that lactic acid fermentation (LAF) produced has been highly used in many purposes. Terra Preta Sanitation (TPS) applies LAF in the treatment of human excreta. Effective microorganisms (EM) contain lactic acid bacteria. This experiment investigated LAF in stored faecal substrate added with 100 milliliter (ml) of EM. Substrates were analyzed using standard chemical parameters following the German “Methods Book for the Analysis of Compost”. Results showed that pH did not go down to acidic level in all substrates. Without EM, total Nitrogen deceased from 523 milligram per liter (mg/l) to 495mg/l after 1 month but has shown increase from 523mg/l to 547.66 with EM. Total organic carbon (TOC) with EM was higher than without EM after 1 month but opposite results were found in substrates stored for 4 months. Without EM, total Phosphorous increased after 1 month from 282mg/l to 302mg/l but decreased after 4 months from 282mg/l to 257.50mg/l. In conclusion, changes in chemical characteristics of the faecal substrates could be due to EM but the effects could hardly be attributed to LAF.


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Preliminary Study on the Use of Lactic Acid Fermentation in Terra Preta Sanitation

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