The invention relates to a
combined technique of treating and reusing the organic
sewage which is rich in
cyanogen,
ammonia and salt, and adopts the combined techniques of acidified decyanation (with the
sodium cyanide recollected), basified
ammonia blowing (with
ammonium salt recollected), oxidation by adding
chlorine, biological treatment,
precipitation and clarification, deep oxidation, biological
active carbon filtering, one-time brine refining, microstraining film, and other combined techniques, and then the
chlorine alkali is produced after the secondary brine refining in the
chlorine alkali industry and the entrance into the ionic membrane electrobath. The
combined technique can be used for treating the industrial
sewage in the tricyanogen
chloride, chlorine alkali, gold mine,
galvanization and other industries and conduct
recovery of the resources, thereby overcoming the disadvantages that the prior art has narrow applicability and treatment function and disappointing treatment result, cannot recollect the resources, and has high treatment cost and unobvious economical benefit. The combination of the technique is scientific and reasonable, the technique is novel, unique and mature, the treatment is good, and the
combined technique has a plurality of functions, strong applicability, wide use range and remarkable environmental and economical benefit.