Table 1.
The substrate composition of the anaerobic monodigestion (AMD) of rice straw (RS) under freshwater (FW) and thalassic (TH) conditions, and anaerobic co-digestion (ACD) of rice straw and Ulva spp. (U) under thalassic (TH) condition.
| Set-ups | Biomass substrates (g, DW) |
Liquid substrates (g, WW) |
Microbial seeds (g, WW) |
|||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Powdered unwashed U | Macerated RS | Distilled water | Seawater | FW |
TH |
|||||
| HB | MF | HB | MF | |||||||
| AMD | FW | BH-P | - | 25 | 225 | - | 125 | 125 | - | - |
| NaOH-P | - | 250 | - | - | ||||||
| TH | BH-P | - | 225 | - | - | 125 | 125 | |||
| NaOH-P | - | - | - | 250 | ||||||
| ACD | TH BH-P | 100:0 | 25 | 0 | - | 225 | - | - | 125 | 125 |
| 75:25 | 18.75 | 6.25 | ||||||||
| 50:50 | 12.5 | 12.5 | ||||||||
| 25:75 | 6.25 | 18.75 | ||||||||
AMD- anaerobic monodigestion; ACD- anaerobic co-digestion; FW- freshwater; TH- thalassic; BH-P- biological hydrolysis pretreatment; NaOH-P- 3% NaOH (w/w) pretreatment; HB- hydrolytic bacteria; MF- methane fermenters; DW- dry weight basis; WW- wet weight basis.