Optimising pyrolysis conditions for high-quality biochar production using black soldier fly larvae faecal-derived residue as feedstock.

Heliyon
Nqobile NkomoRoland Missengue

Abstract

The disposal of feacal matter from Urine Diversion Dry Toilets is a significant challenge due to limited land availability, possible underground water contamination, and the risk of spreading diseases. The collected faecal matter can be fed to Black Soldier Fly Larvae to produce protein-rich larvae used as animal feed. The disposal of the leftover waste (BSFL residue) is still a problem due to the risk of residual pathogen contamination. The BSFL residue contains residual plant nutrients and can be further processed into biochar. Faecal matter biochar offers an exciting value proposition where the pyrolysis process guarantees a 100% pathogen elimination. It also results in significant waste reduction in transport, storage weight, and volume. A preliminary study was conducted to (i) optimise pyrolysis conditions (optimal temperature treatment and residence time) for biochar production using residue obtained after faecal matter from urine diversion dry toilets was fed to black soldier fly larvae as feedstock; and (ii) determine the physicochemical and morphological characteristics of biochar produced. The residue was pyrolysed at 300, 400, and 500 °C and characterised for chemical, biological and physical characteristics. Surface...Continue Reading

References

Mar 9, 2010·Bioresource Technology·Xinde Cao, Willie Harris
Nov 30, 2010·Bioresource Technology·Jin-Hua YuanHong Zhang
Nov 23, 2013·Tropical Medicine & International Health : TM & IH·Ian J BanksMary M Cameron
May 6, 2014·Journal of Hazardous Materials·Taina TervahautaGrietje Zeeman
Jan 18, 2015·Waste Management & Research : the Journal of the International Solid Wastes and Public Cleansing Association, ISWA·Zahra KhanmohammadiMohammad Reza Mosaddeghi
Jun 13, 2018·The Science of the Total Environment·J L Munera-EcheverriJ Mulder
Aug 6, 2018·The Science of the Total Environment·Lijian LengWenguang Zhou

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