{
  "dataset_id": "DS-05",
  "title": "A longitudinal dataset of reactor adaptation and operation during semicontinuous anaerobic digestion of black liquor",
  "doi": "10.17632/jpnjmzp6bj.1",
  "licence": "CC BY 4.0",
  "source_sha256": "fa06d79746886eb3c55cacc335ad98551c89e346e6a6ac5672d01fcc974eb49b",
  "conversion_input_sha256": "ad2c39304d98d689b835f3dba2c4b48e690fd77163730fc8345d3dccef1d96e3",
  "processed_sha256": "adbe731a0dbf6f37e0df6ca44ac5d5c8c742b40ac35bbcc20b4c39beb0bd589d",
  "rows": 138,
  "reactors": [
    "RBL",
    "SBL"
  ],
  "time_start": "2025-03-04",
  "time_end": "2025-07-07",
  "missingness": {
    "total_biogas_ml": {
      "present": 120,
      "missing": 18
    },
    "methane_fraction_percent": {
      "present": 86,
      "missing": 52
    },
    "measured_methane_ml": {
      "present": 86,
      "missing": 52
    },
    "temperature_c": {
      "present": 138,
      "missing": 0
    },
    "ph": {
      "present": 72,
      "missing": 66
    },
    "total_vfa_mg_l": {
      "present": 39,
      "missing": 99
    },
    "alkalinity_mg_caco3_l": {
      "present": 4,
      "missing": 134
    },
    "vfa_alk_ratio": {
      "present": 2,
      "missing": 136
    }
  },
  "rules": [
    "No missing measurement was imputed.",
    "Measured methane volume is derived only when total biogas and methane fraction coexist.",
    "VFA/ALK is derived only when both source measurements exist and alkalinity is positive.",
    "RBL and SBL reactor identities remain separate.",
    "This is research-reactor evidence, not full-scale industrial SCADA."
  ]
}