Comparation of HMF technology and MBR for printing and dyeing wastewater treatment

Abstract

In order to meet the influent water quality of reverse osmosis membrane (RO) or nanofiltration membrane (NF) in the water reuse system of printing and dyeing wastewater, and to cope with the impact of actual printing and dyeing wastewater quality and water quantity, a new type was developed and submerged high-strength membrane filtration (HMF) technology for wastewater treatment compared with the traditional membrane bioreactor (MBR) technology. The combined effect of the process was investigated. The results show that compared with the traditional MBR technology, the membrane flux increased from 11~13 L/ (m2·h) to 14~16 L/ (m2·h), and the reflux rate is reduced from 250%~300% to 20%. The water quality of the HMF process is better than that of the MBR process, especially suspend solid, as low as 1 mg/L, which effectively guarantees the influent requirements of the subsequent RO/NF. The pollution level is relatively low, which is conducive to long-term stable operation. At present, the technology has been demonstrated and applied in the advanced treatment of wastewater in the printing and dyeing industry, and has a good promotion prospect.

Keywords

• printing and dyeing wastewater
• submerged high-strength membrane filtration
• hmf
• mbr