Advanced Treatment of Dyeing Wastewater by Biological Aerated Filter-Ozonizing-Biological Aerated Filter Processes

2009 ◽  
Author(s):  
Daning Li ◽  
Xiaojun Wang
Keyword(s):  
Advanced Treatment ◽  
Biological Aerated Filter ◽  
Dyeing Wastewater ◽  
Aerated Filter

A Novel Application of Combined Bio-Technologies on Chemical Synthesis-Based Pharmaceutical Wastewater

2012 ◽  
Vol 455-456 ◽  
pp. 1261-1266
Author(s):  
Zhan Li Chen ◽  
Xiao Hua Huang ◽  
Zhen Zhong Liu ◽  
Xian Rong Sun
Keyword(s):  
Wastewater Treatment ◽  
Chemical Synthesis ◽  
First Grade ◽  
Advanced Treatment ◽  
Biological Aerated Filter ◽  
Pharmaceutical Wastewater ◽  
Hydrolysis Acidification ◽  
Aerated Filter ◽  
Low Do ◽  
Organic Wastewater

This chemical synthesis-based pharmaceutical wastewater is treated by the process of hybrid hydrolysis acidification technique (HHAT) with anaerobic-low DO condition and the hybrid aerobic bio-technology consisted of alternate-flow biological reactor (ABR) and two-way-flow biological aerated filter (TBAF). The micro aerobic technology was employed in the HHAT and showed its advantages in refractory organic wastewater treatment. The largest plant in pharmaceutical wastewater treatment at home was built. The practice shows that the organics can be greatly removed and the effluent can reach the First Grade Discharge Standard which can be reclaimed with advanced treatment. The performance indicates that the combined bio-technologies are stable in pharmaceutical wastewater treatment.

Advanced Treatment of Wastewater from an Ethylene Chemical Enterprise by a Biological Aerated Filter-Ultrafiltration-Reverse Osmosis Process

2013 ◽  
Vol 726-731 ◽  
pp. 1673-1678
Author(s):  
Li Hua Li ◽  
Xiu Lan Dai ◽  
Fang Ma
Keyword(s):  
Reverse Osmosis ◽  
Continuous Operation ◽  
Advanced Treatment ◽  
Operating Pressure ◽  
Biological Aerated Filter ◽  
Chemical Cleaning ◽  
Operation Stability ◽  
Ro Membrane ◽  
Aerated Filter ◽  
The Cost

This work focused on the advanced treatment of the secondary treated ethylene chemical plant effluent, which contained high conductivity and high organic concentration. To reduce the cost and improve operation stability, a biological aerated filter-ultrafiltration-reverse osmosis (BAF-UF-RO) process was proposed. The feasibility and effectiveness of the BAF loaded with a novel non-sintered fly-ash ceramsite (NSFC) as pretreatment method were investigated in detail. The results showed that the COD, turbidity, NH3-N and SDI15in the effluent from the BAF were reduced largely. The BAF-UF-RO process was stable with the recovery rate of 75%, and the desalination rate was up to about 97.5%. Moreover, the operating pressure and backwash frequency of RO maintained 0.94-0.98 MPa and 2 times/d, respectively. After continuous operation for four months, there appeared to be no need for chemical cleaning of the RO membrane.

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