Method for removing total nitrogen and total phosphorus in multi-raw material alcohol wastewater

Abstract

The invention discloses a method for removing total nitrogen and total phosphorus in multi-raw material alcohol wastewater. The method comprises the following steps: 5.5-6.5 kg / t of a sewage polyferric sulfate adsorbent and 50-60 ppm of a polyacrylamide flocculating agent are sequentially added to a multi-raw material alcohol wastewater clear liquid, solid-liquid separation is carried out by using an inclined plate settler, the obtained solid enters a plate-and-frame filter press and is dehydrated, and the obtained waste liquid enters a clear liquid tank and then enters an alcohol wastewater treatment system. The total nitrogen removal rate of the waste liquid is 47.54-52.84%, and the total phosphorus removal rate of the waste liquid is 44.08-58.02%. The method solves the qualification technical problem of key indexes of total nitrogen and total phosphorus in the waste liquid in the fermented alcohol industry, provides a multi-raw material alcohol wastewater treatment method for large alcohol factories, and has the advantages of small investment and very good application prospect.

Description

technical field [0001] The invention belongs to the technical field of alcohol wastewater treatment, in particular to a method for removing total nitrogen and phosphorus in alcohol wastewater with multiple raw materials. Background technique [0002] The alcohol industry is an important basic raw material industry for the national economy. Alcohol is widely used in chemical industry, food industry, daily chemical industry, medicine and health and other fields. At present, the raw materials for alcohol production in my country are mainly starchy raw materials such as corn, potatoes, and rice. Because the crude protein of corn raw materials is 8-10%, the crude protein of rice is about 7.7%, and the potato is mostly about 3%, so the content of total nitrogen and phosphorus in corn alcohol wastewater and rice alcohol wastewater is more, and the protein feed is generally made of evaporating and concentrating equipment. Products produce low-concentration evaporation condensate wa...

AI Technical Summary

Problems solved by technology

If cassava, corn, rice and other multi-raw material alcohol wastewater treatment is realized on the same production line, effective pretreatment must be carried out on the total nitrogen and total phosphorus in corn and rice wastewater, otherwise it will affect the original subsequent water treatment effect and fail to meet the discharge standards