Biogas and nutrients from blackwater, lawn cuttings and grease trap residues—experiments for Hamburg’s Jenfelder Au district

Table 2 Methods for substrate pre-treatment and anaerobic digestion

	Guideline/equipment
Technique for substrate pre-treatment
Maceration of lawn cuttings	Knife mill GRINDOMIX GM 300 by Retsch, Germany
Preparation of lawn juice	Screw press-type CV by Anhydro, Germany^a, slab press LA 180 by Bürkle, Germany^b
Storage of lawn cuttings	Vacuum bags and store in a cooling chamber (8 °C) until utilization
Technique for anaerobic digestion
Batch tests for biogas potential	VDI 4630 [35]
Semi-continuously fed biogas experiments	Continuous stirred tank reactors (CSTR) with a volume of 10 l, mesophilic conditions about 37 °C ("Semi-continuous biogas production")

^aUsed at the Leibniz Institute for Agricultural Engineering Potsdam-Bornim (ATB), Germany
^bUsed at the Thünen Institute Hamburg-Bergedorf, Germany

ISSN: 2192-0567