Lanlv's in situ oxidation technology reduces a lot of deficiencies, which determines that our device first continuous and stable operation, followed by a large scale of disposal, and again the removal rate of organic matter is more than 99%, after disposal TOC drops to 10 ~ 30PPM, or even lower. The salt after in situ oxidation is purified by water solution filtration to remove carbon residue, and MVR desalination or salt separation treatment. The purified salt is recycled as an industrial by-product.