The present research work aims to develop the screw press-dewatering unit of 50 kg per hour capacity for biogas slurry as waste and produces organic solid–liquid fertilizers. The performance effect on moisture content in biogas slurry and shaft speed of developed unit in terms of dewatering efficiency and dewatering rate was evaluated. The result showed the higher dewatering efficiency of 81.82% and dewatering rate of 49.38 kg per hour. The properties of separated solid fertilizer from raw biogas slurry were determined such as total solids content of 10.7%, ammoniacal nitrogen of 2.6 g per kg, total nitrogen content of 4.9 g per kg, phosphate content of 5.0 g per kg, and potassium content of 3.0 g per kg, respectively. In liquid, fertilizers were obtained such as total solids content of 4.07%, ammoniacal nitrogen of 3.1 g per kg, total nitrogen content of 5.8 g per kg, phosphate content of 2.2 g per kg, and potassium content of 5.8 g per kg, respectively. The organic solid fertilizer can be used as phosphorous-rich fertilizer for improving soil characteristics, and liquid fertilizers can be used as pesticide and fungicide to control pests on crop. The economic analysis shows that the manufacturing cost of whole process was 2325.35 US$ and the payback period was 0.88 years.
Development of Screw Press-Dewatering Unit for Biogas Slurry
Lect. Notes Electrical Eng.
2023-03-12
20 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
A new dewatering system for slurry using planetary rotation chambers
British Library Conference Proceedings | 1998
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