Shanxi Jun'an Louw Dong Energy Technology Co., Ltd.

This project has a treatment capacity of 2,400 m3/d and is a wastewater treatment project for a key coal chemical enterprise located in the Wutong Industrial Park, Wutong Town, Xiaoyi City, Lvliang, Shanxi Province.
Longantai Company applies its self-developed oil separation and air flotation technology + LCO ozone catalytic oxidation technology + high-efficiency AO biochemical process. This combination effectively removes dozens of inorganic and organic compounds from the coal chemical wastewater. Inorganic compounds mainly include large amounts of ammonium salts, thiocyanates, sulfides, and cyanides; organic compounds include phenols, mono- and polycyclic aromatic compounds, and nitrogen, oxygen, and sulfur-containing heterocyclic compounds that are difficult to degrade.
The treatment ensures that the wastewater meets the "indirect discharge" parameters specified in Table 3 of GB16171-2012 "Pollutant Discharge Standards for Coking Chemical Industry," with the following standards: COD < 80 mg/L, ammonia nitrogen < 10 mg/L, and total nitrogen < 25 mg/L.

Wastewater Quality:

Design influent: 

pH: 8-9.5
COD_cr: 5,000-6,000 mg/L
NH₃-N: 200-300 mg/L
Volatile phenols: 800-1,100 mg/L
Oil content: 100-250 mg/L
Sulfur compounds: 40-150 mg/L
Cyanides: 13-20 mg/L
Thiocyanates: 400-1,000 mg/L

The design effluent standards are:

COD: < 80 mg/L
Ammonia nitrogen: < 10 mg/L
Total nitrogen (TN): < 25 mg/L    

Influent Water Volume: 2400 m3/d

Process Description: Raw water regulation tank + oil separation tank + air flotation unit + ozone pre-oxidation tank + AO biochemical process + ozone catalytic oxidation tank + BAF (biological aerated filter)