Low-strength wastewater

Table 12.2 Summary of AnMBR performance for low-strength wastewater treatment... 

Rabaey et al. produced caustic soda from brewery wastewater while producing currents up to 1015 A m [150]. The lamellar-type reactor with a total liquid volume of 1.631 (66% anodic) produced caustic soda in the cathodic compartment taking advantage of the sodium diffusion from the anode and the proton consumption in the cathode compartments. The energy input as the ratio of electricity to caustic soda produced was 1.6 kWh kg NaOH, which corresponds to an operational cost of around 0.1 kg low-strength caustic soda. This price is lower than the market price of above 0.5 kg [150]. This impressive result should be confirmed after long-term performance to assess future applications. 

Berube, P.R., HaU, E.R., Sutton, P.M., 2006. Parameters governing permeate flux in an anaerobic membrane bioreactor treating low-strength municipal wastewaters a literature review. Water Environment Research 78 (8), 887—896. 

Cationic coagulants. Also generally supplied as solution liquids in ranges from 40 to 70% active strength. Low MW of 0.25 to 0.75 M. Useful for reclaiming oily wastewaters use at 150 to 300 ppm typically. 

---