Chemical fiber wastewater refers to all kinds of wastewater produced in chemical fiber production, such as PET wastewater, PTA wastewater, cotton pulp black liquor, viscose wastewater and so on. The composition of its wastewater is complex, often containing strong acid, strong alkali, cellulose and hemicellulose, alcohols, pectin and so on. And all kinds of toxic substances. For example, the main pollutants in PET wastewater are ethylene glycol, ethylene glycol, ethylene glycol acetate, terephthalic acid and its intermediates and oligomers; PTA wastewater mainly contains phthalic acid, p-xylene, benzoic acid, methyl acetate, acetic acid and other pollutants. Polyacetate wastewater contains pollutants such as PTA, acetaldehyde, EG, diethylene glycol, triethylene glycol and spinning oil.
Table 1 Production Wastewater Quality and Effluent Index
project
pH value
cash on delivery
(mg/L)
human body
(mg/L)
sage
(mg/L)
petroleum
(mg/L)
ammonia nitrogen
(mg/L)
sulfuret
(mg/L)
Wastewater quality
4.5~9.5
3000~6000
2000~3300
20~35
140~500
Emission index
6~9
≤200
≤60
≤200
≤ 10
≤50
≤ 1.0
cash on delivery
Biochemical oxygen demand (mg/L)
(mg/L) Ammonia nitrogen
Chromaticity (mg/L)
(Time) SS
PH value (mg/l)
8500 435 1 100 800 12 10.6
This is the wastewater index of two companies. What else do you need? Are you writing a paper or therapy? It's different.