Fermentation Broth Clarification, Purification, Desalination, Concentration
1. The Fermentation Broth
The fermentation broth’s pH is about 3.5-4.0; the concentration of product is about 8-12g/L. It is used in clarification, purification, desalination, concentration.
2. Process Principle
After the ceramic membrane treatment, the fermentation broth gets rid of macromolecular suspended solids and gains clarified dialysate, to fulfill the feed clarification requirements of the subsequent ultrafiltration system. After entering into the ultrafiltration system, ceramic membrane dialysis fluid is decolorized and removes small molecular protein, thus improving the product purity. The ultrafiltration dialysis fluid first enters the system equipped with cation exchange resin. The intermediate material is obtained after exchange and then it is re-loaded into the system equipped with anion exchange resin, thus ultimately achieving the effect of desalination and purification. After regeneration, resin with saturated exchange re-enters the exchange area to desalinate the feed solution. Product obtained from continuous ion exchange enters the reverse osmosis system for concentration, which can reduce the energy consumption and costs of subsequent triple effect evaporation.
Moreover, the data for desalination and purification after the continuous ion exchange system are as follows:
Basic data | Feed | 18m3/hour |
Feed conductivity | ～5ms/cm | |
Feed pH4 | ～5 | |
Technical indicators | Consumption of cation resin | 28m3 |
Consumption of anion resin | 28m3 | |
Amount of acid | 0.58m3/hour (concentrated hydrochloric acid) | |
Amount of alkaline | 0.44 m3/hour (concentrated alkaline) | |
System water consumption | 26 m3/hour (containing acid and alkali water) | |
Product yield | 98.5% | |
Product conductivity | ≤100us/cm |
3、Operating Cost
●Ceramic Membrane System：
Annual output: 160 ton /day
Working hours: 16 hours/day; 330 days/year
Direct operating cost: 1,660,000 yuan/year
Unit processing costs: 31.4 yuan/ ton
●Ultrafiltration Membrane System：
Annual output: 360 ton /day
Working hours: 16 hours/day; 330 days/ year
Direct operating cost: 1,072,000 yuan/year
Unit processing costs: 9 yuan/ ton
●The Continuous Ion Exchange System:
The total annual operating cost of equipment | 1030 | 10,000 yuan |
Annual output | 132,000 | ton/year |
Unit processing cost | 78.42 | yuan/ton |
unit consumption of electricity capacity | 33.2 | yuan/ton |
Amount of processing pure water unit consumption | 4.32 | yuan/ton |
Amount of unit acid consumption | 16.1 | yuan/ton |
Amount of unit alkali consumption | 24.4 | yuan/ton |
Amount of processing resin unit consumption | 0.4 | yuan/ton |
●Reverse Osmosis Membrane System
Annual output: 560 ton /day
Working hours: 168hours/day; 330 days/ year
Direct operating cost: 360,000 yuan/year
Unit processing costs: 1.95yuan/ ton
