Black Liquor from governance, the large and medium-sized pulp factory in China, most have adopted the Recovery method, straw Recovery After years of continuous development of a sound, the technology has become mature, and can generate economic benefits, the researchers Pak Nai issues also actively exploring the resources programs. But Recovery larger investment, small pulp plant by funding constraints, Recovery method can not be used, over the years, scientific research institutes and universities in straw pulp production enterprises, and a variety of experimental methods, and take a lot of detours, we have been unable to find affordable and reliable method of governance.

Jinan mainland Engineering Services Limited the technology research organization, after years of repeated exploration experiment has been successful in one out of the waste control by waste, waste to eradicate the straw-pollution path. So far it has built black liquor handle the volume of 600 m3 / day, COD by 100,000 -- 12 thousand mg / l to 10,000 mg / l around the demonstration projects.

The process is the use of chemical plants producing serious pollution of the environment of waste sulfuric acid, soda straw to deal with the serious production plants pollute the environment but difficult to handle on the canoe, after the lignin acidizing separation can composite a better economic benefits. The method is to the black liquor harmful substances such as lignin acid analysis of flocculation to remove, reduce COD black liquor, black liquor removal of the 80% -90%, and the filtrate Acid Analysis processed COD concentration of 10,000 mg / L of water into the middle, the follow-up to Health after treatment discharge standards.

The method has resolved the plant's waste acid pollution, a soda straw radical black liquor factory pollution, after the lignin acidizing separation as a multi-purpose resources, a good market prospects and economic benefits, the current market demand. While the technology has the investment and operating costs low and stable characteristics, is one worth promoting technology.