Ceramic Membranes In Wastewater Distillation

With increasing concerns about the energy crisis and clean water shortage anaerobic membrane bioreactor anmbr treating wastewater is one of the promising technologies on account of energy production nutrients recovery potential and good quality of effluent even under unfavorable condition full scale 4 5 and pilot scale anmbrs 6 7 are already used in high.

Ceramic membranes in wastewater distillation.

In this review article the key types of ceramic membranes that are applied in water and wastewater treatment are described and analysed. To reduce the emission of radioactive waste water and reuse high value 10 b rich nuclear grade boric acid from a nuclear power plant a two step membrane process was proposed based on the combination of two types of ceramic membranes. First a ceramic nanofiltration membrane was used to purify the boric acid by removing the nuclide. Nowadays integrated microfiltration mf membrane systems treatment is becoming widely popular due to its feasibility process reliability commercial availability modularity relative insensitivity in case of wastewater of various industrial sources as well as raw water treatment and lower operating costs.

Common ceramic membranes including those made of alumina zirconia titania silica and zeolite are presented first where their advantages and disadvantages are compared and discussed. Its application in wastewater treatment is emerging more and more but despite its great potential for the realization of zero liquid discharge systems many advances are still needed for its acceptance by industrial operators. The presence of organic hydrophilic materials in the wastewater leads to the blockage of large pores in membranes and fouling but ceramic membranes with good resistance during cleaning with chemical agents yue et al 2015 allow the membranes to recycle during first stage and result in good performance mei et al 2017 yue et al 2018. The well thought out designed and implemented use of membranes can decrease capital.

Membrane distillation md is a thermally driven membranous process and in the recent years it has received increasing attention in desalination. Wastewater and water treatment methods include both physical methods such as sedimentation and filtration membranes media filtration and chemical methods such as coagulation ph adjustments addition of anti scalants and acids 4 5 regardless of its domestic municipal or industrial origin wastewater is a serious environmental constraint that dictates effective treatment for its safe. Hydrophobic titania ceramic membranes 300 kd were prepared by grafting of c6f13c2h4si oc2h5 3 and c12f25c2h4si oc2h5 3 molecules and thus applied in membrane distillation md process of nacl solutions. Grafting efficiency and hydrophobicity were evaluated by contact angle measurement atomic force microscopy scanning electron microscopy nitrogen adsorption desorption and liquid entry.