{
  "title": "六方案比价基准（与站内计算器同口径）",
  "updated": "2026-11-10",
  "disclaimer": "价格为用户输入项（按当期询价填写），本文件只提供 COD 当量与密度基准；比价一律用元/kgCOD 与吨氮成本口径，不看吨价。",
  "solution_ids_in_calculator": [
    "naac-l20",
    "naac-l25",
    "naac-l30",
    "naac-stri",
    "naac-sanh",
    "composite-40w"
  ],
  "compare_rules": [
    "元/kgCOD = 吨价 ÷ (COD 当量 × 1000)",
    "吨氮成本（元/kgN）= 日成本 ÷ (Q × ΔTN ÷ 1000)",
    "运费、溶药人工、储罐保温投入需另行摊入吨氮成本"
  ],
  "default_density_t_m3": {
    "naac-l20": 1.11,
    "naac-l25": 1.13,
    "naac-l30": 1.17,
    "composite-40w": 1.15
  },
  "solutions": [
    {
      "id": "naac-l20",
      "sku": "HQ-NaAC-L20",
      "name": "液体乙酸钠 20%",
      "cod_equivalent_kg_per_kg": 0.156,
      "density_t_m3_20c": 1.11,
      "price_yuan_per_ton": null,
      "price_note": "询价填写"
    },
    {
      "id": "naac-l25",
      "sku": "HQ-NaAC-L25",
      "name": "液体乙酸钠 25%",
      "cod_equivalent_kg_per_kg": 0.195,
      "density_t_m3_20c": 1.13,
      "price_yuan_per_ton": null,
      "price_note": "询价填写"
    },
    {
      "id": "naac-l30",
      "sku": "HQ-NaAC-L30",
      "name": "液体乙酸钠 30%",
      "cod_equivalent_kg_per_kg": 0.234,
      "density_t_m3_20c": 1.17,
      "price_yuan_per_ton": null,
      "price_note": "询价填写"
    },
    {
      "id": "naac-stri",
      "sku": "HQ-NaAC-S58",
      "name": "三水乙酸钠",
      "cod_equivalent_kg_per_kg": 0.47,
      "density_t_m3_20c": null,
      "price_yuan_per_ton": null,
      "price_note": "询价填写"
    },
    {
      "id": "naac-sanh",
      "sku": "HQ-NaAC-S99",
      "name": "无水乙酸钠",
      "cod_equivalent_kg_per_kg": 0.78,
      "density_t_m3_20c": null,
      "price_yuan_per_ton": null,
      "price_note": "询价填写"
    },
    {
      "id": "composite-40w",
      "sku": "HQ-CS-40W",
      "name": "复合碳源 40W",
      "cod_equivalent_kg_per_kg": 0.4,
      "density_t_m3_20c": 1.15,
      "price_yuan_per_ton": null,
      "price_note": "询价填写"
    }
  ]
}