2 results about "Backwashing" patented technology

The invention discloses a sequencing batch treatment system and method for inactivating micro organisms in water, wherein the sequencing batch treatment system comprises a modular filtering device; the modular filtering device has an endogenous backwashing function, and backwashing drainage of the filtering device is communicated with a water inlet of an inactivation reaction device; a water inletand a medicament inlet are formed in the top of a cylinder of the inactivation reaction device, and a drainage port is formed in the bottom; a medicament storage barrel of a medicament feeding deviceand an automatic medicament feeding device are connected with a medicament inlet of the inactivation reaction device through pipelines. Medicaments are not added into a water production system; incoming water is filtered; the micro organisms in water are filtered, enriched, backwashed and discharged, and then the micro organisms in backwashed water are subjected to sequencing batch inactivation treatment, so that the problems of large medicament dosage, possible influence on a main production process of a water system, high subsequent treatment cost and the like caused by the fact that medicaments are added into a water production system in a traditional treatment mode are solved.

The invention belongs to the technical field of environmental protection, and particularly relates to a PVC mother liquor recycling treatment device and process. The device comprises a PVC mother liquor pipeline, the PVC mother liquor pipeline is sequentially connected with an advanced oxidation reactor, a buffer sedimentation tank, a ceramic membrane filter, a heat exchanger and a reverse osmosis desalting device, a concentrated water outlet of the reverse osmosis desalting device is connected with the ceramic membrane filter through a backwashing pump, and the ceramic membrane filter and the advanced oxidation reactor are both connected with an ozone generator; the PVC mother liquor directly enters a Fenton + ozone advanced oxidation reactor without cooling, Fenton-ozone advanced oxidation is carried out, then a ceramic membrane filter is adopted for ceramic membrane filtration, after heat exchange, filtered water is directly subjected to reverse osmosis desalting treatment, produced water is recycled, and concentrated water is used for backwashing the ceramic membrane filter. According to the method, high-quality recovery of the PVC mother liquor can be realized, the COD discharge amount and the water taking amount of a factory are reduced to a great extent, and the benefits of PVC production enterprises can be effectively increased.