Solution Cases: Textile Dyeing Wastewater Solution 9,600 m³/d Capacity
Solution Case: Textile Dyeing Wastewater
Start Up: January 2016
Capacity: 9,600 m³/d
Project Overview
Toray Industries, Inc. is an integrated chemical industry group developing its business in 26 countries and regions worldwide.
Toray develops the Foundation Businesses of fibers & textiles and plastics & chemicals as well as businesses such as IT-related products, carbon fiber composite materials, pharmaceuticals & medical products, environment & engineering including water
treatment.
LTX MILL 2 is a TORAY factory which is located in Bangkok Thailand, this factory's main products are synthetic textiles, and the amount of daily discharge is about 9600m3, The main component of the wastewater is Textile dyeing Wastewater, the characteristics as below:
The high content of the organic pollutants, and the organic matter is difficult to degrade. The B/C ratio is lower, only about 0.3, and biodegradability is poor.
These high chroma, sometimes as high as 4000 or more.
The alkalinity and PH value changed varied, and the water quality changed violently.
Challenge
The existing plant's major process is Anaerobic+Aerobic(Active Sludge) biological treatment technology, after more than ten years of operation, equipment obsolescence, and unstable operation, it is difficult to promote the local discharge criteria.
According to the owner's requirements, upgrade the existing plant and improve the stability of effluent quality. To solve the problem of activated sludge bulking.
The Inlet and outlet values of the biological treatment system are as follows :
| Project | Unit | Influent | Effluent |
| COD | mg/L | 2500 | 200 |
| BOD | mg/L | 800 | 30 |
Upgraded the existing front active sludge tank to MBBR process, adding a certain number of BioCell media to the reactor, increasing the capacity and reinforcing of impact for the system.
Effluent COD was well removed, and the settling performance of activated sludge was greatly improved.
