The main non-wood lignocellulose resource, wheat straw, has been utilized in bio-mechanical pulping process for paper industry to alleviate feedstock shortages, reduce environmental pollution, and lower carbon emissions as well. However, the wheat straw-based bio-mechanical pulping effluent (BMPE) could cause water pollution and resource waste if not properly handled. The efficient extraction of lignin biomass from BMPE is still a great challenge. The novelty of this study is to propose a facile process for efficient extraction of lignin with high yield, high purity and controllable morphology from wheat straw based BMPE via a commercialized technique, LignoForce™ process, which has been industrially applied in lignin extraction from wood based Kraft pulping black liquor. Considering the unique attributes of wheat straw (non-wood) based BMPE, we successfully improved the LignoForce™ technology for high efficient lignin extraction. The extracted lignin from BMPE was characterized for its chemical properties, ash content, monosaccharide composition, controllable morphology, particle size/distribution, and molecule weight/distribution at varying oxygen dosages and oxidation temperatures. The resultant lignin particles possess comparable regular spherical morphology with controllable particle size/ distribution. Additionally, the yield and ash content of the lignin extracted from BMPE and chemical-mechanical pulping effluent (CMPE) of wheat straw were compared and analyzed to evaluate the feasibility of the improved LignoForce™ technology utilized in non-wood BMPE with high extraction efficiency. The study found that the practical successive LignoForce™ treatments, including oxidation process (O₂), CO₂, and H₂SO₄ acidification procedures, showed great potential in obtaining high-yield and high-quality acid-precipitated lignin with controllable morphology from the non-wood (wheat straw) based BMPE.

主要的非木材木质纤维素资源麦秸已被用于造纸工业的生物机械制浆工艺，以缓解原料短缺，减少环境污染，并降低碳排放。然而，麦秸基生物机械制浆废水（BMPE）如果处理不当，可能会造成水污染和资源浪费。从 BMPE 中高效提取木质素生物质仍然是一个巨大的挑战。本研究的新颖之处在于提出了一种通过商业化技术 LignoForce™ 工艺从小麦秸秆基 BMPE 中高产率、高纯度和可控形态高效提取木质素的简便工艺，该工艺已在工业上应用于从木材中提取木质素硫酸盐法制浆黑液。考虑到麦秸（非木材）基BMPE的独特属性，我们成功改进了 LignoForce™ 高效木质素提取技术。从 BMPE 中提取的木质素的特征在于其在不同氧气剂量和氧化温度下的化学性质、灰分含量、单糖组成、可控形态、粒径/分布和分子量/分布。所得木质素颗粒具有相当的规则球形形态和可控的粒度/分布。此外，对比分析了BMPE和麦秸化学机械制浆废液（CMPE）提取的木质素的得率和灰分含量，以评估改进的LignoForce™技术用于非木BMPE高提取效率的可行性。研究发现，实用的连续 LignoForce™ 处理，₂ )、CO ₂和H ₂ SO ₄酸化程序显示出从非木材（麦秸）基BMPE中获得高产、高质量、形态可控的酸沉淀木质素的巨大潜力。