Waste liquid treatment method for CMC or sodium sarcosinate or laundry detergent

Abstract

The invention relates to a waste liquid treatment method for CMC or sodium sarcosinate or laundry detergent, the waste liquid is brine waste, the brine waste is evaporated through MVR, 80% of inorganic salt is removed, a solution containing 10% to 15% of salt, 40% to 50% of moisture and 35 to 50% of organic matter is left, the COD (chemical oxygen demand) of the solution which is called as mothersolution for short reaches 0.3 million mg/L, the mother solution is prepared into a solution of which the COD (chemical oxygen demand) is 0.01 million to 0.14 million mg/L in a solution preparation tank, then the prepared waste solution is pumped into USAB tank for treatment, and the waste solution sequentially flows into an anoxic tank, a PACT tank, an intermediate settling tank, a hydrolysis acidification tank, a contact oxidation tank and a secondary settling tank in an overflow way for treatment, detection and discharging is performed after the treatment is finished. The waste liquid treatment method provided by the invention has the advantages that the design is perfect, the convenience in use is realized, the salt in the waste liquid is effectively removed and a number of recycled water up to industrial reuse standards is produced after the treatment, the water quality is further improved by using twice settling through the intermediate settling tank and the secondary settling tank, and no incrustation is produced during use.

Description

technical field [0001] The invention relates to the field of waste water treatment, in particular to a waste liquid treatment method of CMC, creatine sodium or laundry detergent. Background technique [0002] The main pollutant produced by the production of CMC or sodium creatine or laundry detergent is wastewater, which is characterized by high salt and high COD (20000-40000mg / L). For every ton of CMC or creatine sodium or laundry detergent produced, about 2.5 to 3 tons of waste liquid will be produced. Wastewater treatment has always been an important issue worldwide, especially in developed countries. For example, Japan adopts the hydrogen peroxide treatment process, and Germany adopts the resin exchange method, but they still have their own shortcomings and fail to achieve zero discharge of surface water. my country has not yet seen mature technology patents in this regard, and there is still a widening gap compared with developed countries. It is very important to sol...

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Problems solved by technology

[0003] Patent CN201610346447.3, CMC wastewater treatment method, although the regenerated water produced by it has reached the industrial water standard, and it will generate a lot of scale during use, causing problems such as water pipe blockage, which brings troubles for later cleaning treatment

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