Industrial Technology Research Institute

Sheng-Hsin Chang

Huey-Song You

Kuan-Foo Chang

Shan-Shan Chou

Shwu-Huey Perng

Wang-Kuan Chang

A system for treating ammonia-based wastewater is provided. The system includes a first reactor, including: denitrification bacteria for denitrification; a second reactor disposed on the back of the first reactor, wherein the second reactor includes an aerator and aerobic heterotrophic bacteria, and has an HRT of less than 6 hours; a third reactor disposed on the back of the first reactor, wherein the third reactor contains nitrification bacteria carried on the carriers for improving nitrification; and a solid-liquid-separating reactor disposed on the back of the third for separating the solids and liquids in the effluent of the third reactor.

System and method for treating ammonia-based wastewater

Treatment system for wastewater containing ammonium is provided. The treatment system of the present invention includes an ammonia oxidation reactor and a membrane reactor disposed on the back of the ammonia oxidation reactor. The ammonia oxidation reactor includes biological carriers for carrying the ammonium oxidation bacteria and nitrite oxidation bacteria, a pH level controller for increasing the pH level to above 7.5, and a DO (dissolved oxygen) controller for reducing the DO content to less than 1.0 mg/L. The membrane reactor composed of a membrane and an aerator is used to separate the solids and liquids of the effluent of the ammonia oxidation reactor. In addition, a method for treating wastewater containing ammonium is also provided.

System and method for treating wastewater containing ammonia

The present invention disclose a process for treating a wastewater from a foodstuff factory, wherein the pipelines are cleaned and the containers are sterilized by using a water containing peracetic acid as an disinfection agent. The process of the present invention includes aerating or stirring the wastewater to decompose the peracetic acid contained therein, and carrying out an aerobic treatment to decompose the organic compounds in the wastewater. Peracetic acid is in the unstable peroxidation state, and can be decomposed into acetic acid by self-oxidation-reduction. The process of the present invention uses aeration or stirring to trigger the decomposition of the peracetic acid, so that the disinfection function thereof is reduced, and thus the aerobic treatment can be conducted to decompose the organic compounds in the wastewater.

Growing community of inventors

Miaoli County, Taiwan

Sheng-Hsin Chang