8. Conclusion

Wood vinegar is prepared from pyrolysis of lignocellulose waste and biomass by fast and slow pyrolysis. The characteristics and properties of obtained wood vinegar are influenced by the type of feedstocks and production techniques. The vinegar is a complex mixture of polar and non-polar chemicals compositions, in which water, acetic acid and phenols are main proportions. Some physical properties such as pH (2–4), specific gravity within (1.005–1.016 g/mL), color, odor, dissolved tar content (0.23–0.89% wt.), and transparency have been evaluated as quality index of wood vinegar product. Wood vinegar, as a natural product, has beneficial applications in wildly fields; including agriculture, pharmacy and biomedicine, veterinary and animal production, food processing and wood preservative.
