Digestion of bio-waste - GHG emissions and mitigation potential

Table 1 Characteristics of investigated AD plants based on bio-waste

Plant no.	Installed electrical capacity kW _el	Kind of fermentation ^a	Temperature ^b	Range of temp. in °C ^c	Mode of operation	HRT in days ^d	Residues storage tank	Post-composting ^e	Type of aeration (post-composting)	External heat utilization ^f
1	630	Wet	M		Multi-stage	8	Covered	x	Open, unaerated
2	536	Wet	T		Multi-stage	20	Covered	x	Open, unaerated	x
3	986	Wet	M		Single-stage	17	Open
4	1200	Wet	M	37-40	Multi-stage	25	Open, covered
5	1790	Dry	T		Single-stage	25	Gas-proof covered
6	1413	Dry	T	55	Single-stage	21	Covered	x	Open, unaerated
7	816	Dry	T		Single-stage	28		x	Enclosed, aerated (pressure ventilation)
8	625	Dry	T	55	Single-stage	14	Gas-proof covered	x	Enclosed, aerated and unaerated (pressure ventilation)	x
9	640	Dry	T		Single-stage	21	Covered	x	Enclosed, aerated (pressure ventilation)
10	625	Batch	M	37-39	Single-stage	28		x	Enclosed, aerated (pressure ventilation)	x
11	680	Batch	M	40-42	Single-stage	21		x	Open, aerated, enclosed	x
12	370	Batch	M	40-42	Single-stage	21		x	Open, unaerated	x

^aWet = wet fermentation, dry = dry fermentation, batch = batch system (discontinuous). ^bM = mesophilic, T = thermophilic. ^cAccording to the information of plant operators (if available). ^dHydraulic retention time. ^ex = post-composting process. ^fx = external heat utilization.

ISSN: 2192-0567