| Membrane technology is widely used, and biofouling and concentration polarization are still the two main problems. Membrane prepared with antibacterial surface is the only way to solve biofouling. Concentration will become more obvious in thick membranes. Thus, antibacterial membrane and ultra-thin membrane is prepared in the experiment. Renewable energy and energy recovery play an important role because of the looming energy crisis, and a combination between osmotic power and membrane technology will benefit more. It can not only recover energy when use forward osmosis technology to treat electrodialytic hyperhaline wastewater, but also reduce pollution.The paper studied the method to prepare UV-triggered surface grafting antibacterial membrane and the effect of membrane performance under different irradiation time. The study firstly make evaluated conditions tested, and do the following experiment with optimum condition. The results showed that the use of N-(4-hydroxyl-3-methoxyl-benzyl)-acrylamide (HMBA) as a modifier, with the extension of the irradiation time, the hydrophilic of the membrane get better. The contact angle drops from 70° to 40 °. The water flux sharply increased from 17 LMH to 36 LMH, while salt flux slightly increased from 28 LMH to 32 LMH. Antibacterial efficiency is gradually increased, it was close to 100% when the irradiation time was 10 min.In this experiment a novel no-support layer interfacial polymerization membrane was prepared and characterized. This film does not have a dense skin in the traditional sense, but fill the hole of the polyester screen mesh with an interfacial polymerization reaction. A 60 μm membrane will be formed on the surface. It can reduce the concentration polarization effectively, and the production process is simple. The results showed that the addition of interfacial polymerization layer effectively improves the hydrophilic and permeability properties of the membrane, and the contact angle decreased from 110 ° to 70°elow.The paper studied about forward osmosis technology used in osmotic power generation. Carried out the data based on experiment in the laboratory, a FO unit for one membrane was build. It’s used for testing the feasibility and rationality of the experimental pipeline to osmotic power generation, and then design osmotic power generation prototype. The results showed that the unit for single membrane test is stable, and pipeline is reasonable. The osmotic power generation is stable when simulated in the software. The results shows, the water flux is 3.14 LMH, and salt flux is 3.58 gMH. The theoretical energy density is 1.13 W/m2, that means at least nine membranes were need to be able to reach the goal.This paper combined forward osmosis and electrodialytic technology to treat amino acid mother liquor. It first examine the effects of current density and flow rate, and feasibility of recovery osmotic power from electrodialysis hyperhaline wastewater. The results showed that the higher current density is, the lower the recovery of amino acids is, and the higher the rejection rate is. Flow rate increased, the amino acid recovery and desalination rate changed little. Water flux of the experiments for recycling is 25 LMH. What’s more, the liquid volume was reduced to half after a 6 h’s running and it offers a good result. |
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