The concentration of COD is relatively high, generally ranging from 5000 to 80000 mg/L, and some newly synthesized antibiotics can reach as high as150000 mg/L..
The concentration of SS in wastewater is very high (500-25000 mg/l). Among them, the residual culture medium and microbial mycelium produced by fermentation are the main ones.
There are toxic substances such as refractory substances and antibacterial antibiotics. The influence of antibiotic residue titer on microorganisms is mainly manifested in the following four aspects:
Inhibit the synthesis of cell wall peptidoglycan and make it lose its protective effect.
Destroy cytoplasm
The concentration of inorganic ions is high, such as SO42- in Qingda wastewater is 4000mg/l, and CL- in rifamycin wastewater is 8400mg/L. ..
The composition of water quality is complex.
To sum up, there are many kinds of antibiotic wastewater and its components are complex, so if a single treatment method is adopted, the effect will be minimal. On the basis of experiment and engineering practice, our company puts forward the following economical, efficient, simple, stable and reliable antibiotic wastewater treatment process.
3. Engineering example and operation effect
A pharmaceutical factory in Nanyang is a pharmaceutical enterprise mainly producing meleumycin and gentamicin. The main sources of sewage are wastewater discharged from fermentation workshop and washing wastewater from workshop.
3. 1 Design water quantity and quality
(1) Gentamicin wastewater 500m3/d
Water quality: COD 20000mg/LBOD58500mg/LSS8000mg/L.
(2) The wastewater of meleumycin is 500m3/d.
Water quality: COD 24000mg/LBO D58500mg/LSS 500mg/L.
Design total water volume: 1000m3/d
3.2 Wastewater treatment process
The process flow of wastewater treatment is as follows:
1, pretreatment
2. Biological treatment
After pretreatment, the two kinds of wastewater are mixed in the regulating tank and then biologically treated.