Multiple combined technique for high concentration hard-degraded organic waste water treatment
A technology of organic wastewater treatment and combined process, applied in water/sewage treatment, water/sewage multi-stage treatment, oxidized water/sewage treatment, etc. Reduce basic investment and operating costs, improve biodegradability, and enhance the effect of stability
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Embodiment 1
[0027] Zhuji Tangjiang Bleaching and Dyeing Factory is a medium-sized printing and dyeing processing enterprise. It has a variety of bleaching and dyeing production equipment for dyeing cloth, yarn, and socks. The daily sewage discharge is 1,000 tons, which contains a large amount of PVA slurry wastewater. Changes in water quality and quantity are complex. COD change range: 600-3000mg / l, PH: 6-12, chroma: greater than 300. Using this process, ferrous sulfate is used for coagulation and sedimentation, and it is only added when the main body of the sewage is desizing wastewater, the pH is adjusted to 8-9, and then aerated for 2 hours, and PAM (polyacrylamide, system Water-soluble high molecular polymer), after sedimentation in the inclined tube sedimentation tank, it enters the pre-exposure adjustment tank and mixes with other dyeing wastewater. At this time, the pH value is just between 6-9. , the effluent is discharged after sand filtration. The test results by the local env...
Embodiment 2
[0029] The sewage of a socks factory in Zhongshan is mainly dyeing wastewater and a small amount of bleaching wastewater. The COD range is 400-1000, the water volume is 400 tons, and the chromaticity is greater than 200. During the pilot test on site, different combinations of processes were implemented. A) Aeration Coagulation pretreatment + aerobic biochemical treatment, B) direct adjustment of acidity (no physical and chemical treatment) + hydrolytic acidification + aerobic biochemical treatment. Both treatment processes can achieve good treatment effects: the COD is stable below 80mg / l, and the chromaticity is less than 15.
Embodiment 3
[0031]Zhongshan Fumei Printing and Dyeing Factory is an enterprise that produces woolen dyeing products. The sewage discharge volume is 4,000 tons per day. The original sewage treatment facilities of this enterprise are in stable operation. A lot of resources were wasted, which also caused cost pressures on enterprises. Its original sewage treatment process is coagulation sedimentation + activated sludge method. Coagulation sedimentation adopts ferrous sulfate + quicklime + PAM. The activated sludge method includes two sections of hydrolytic acidification and aerobic biochemistry. The time is long and the effluent can Up to standard. Due to the introduction of more iron ions during the coagulation and sedimentation process, the effluent has the color of iron ions. In the test, the active oxygen system was used to further treat the effluent. The strong oxidizing new ecological oxygen atoms, ozone molecules and hydroxyl radicals can not only destroy the organic chromogenic subs...
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