1. Ammonia removal from hydrometallurgical wastewater

The industries covered by this application include non-ferrous metallurgy, new materials (lithium batteries, microelectronics, etc.), rare earth, PCB, catalysts, inorganic chemical industry, desulfurization wastewater, etc.

Water quality characteristics: ammonia nitrogen content in raw water is different (50-10 000 ppm), COD content is very low (generally only 30-50 ppm), PH value is widely distributed (1-13), and suspended solids are few.

Applicability of membrane ammonia removal: excellent

Bah, the economy is very good. Compared with the traditional ammonia distillation process, in some cases, the investment is only 15% of the ammonia distillation process, and the operation cost is only 20% of the ammonia distillation process. Especially when the water volume is less than 5 t/h or the imported ammonia nitrogen is less than 3 000 ppm, the economic customers of membrane ammonia removal can not resist.

The pretreatment is simple, such as filter press, bag filter, sand filter, etc. Simple pretreatment further improves the economy of membrane deamination.

Balance of material is simple. Because most of the wastewater is clean water and the pollutants are single, the membrane ammonia removal process has little effect on the existing material balance, and the system design is convenient.

The system has high performance. Because there are few factors affecting membrane failure and membrane life, the performance of membrane deamination system is very high, so customers can use it safely.

2. Ammonia removal from evaporative condensate wastewater

This application covers the following industries: chemical fertilizer, pesticide, petrochemical industry, printing and dyeing, biochemical industry, fine chemical industry, zero emission and other evaporative concentration, evaporative crystallization process condensate.

Water quality characteristics: moderate ammonia nitrogen content (800-2000 ppm), wide distribution of COD content (200-10000 ppm), alkaline PH, less suspended solids, high temperature

Membrane ammonia removal adaptability: excellent

Bah, the economy is very good. Without proper traditional process, it is usually treated in other wastewater, which becomes a biochemical problem for customers. Because of the low amount of alkali and no heating, the economy of membrane ammonia removal is very good.

Save investment. Membrane deamination cost is low, and the front evaporator can be made of low-cost stainless steel, much cheaper than titanium evaporator.

The effect of COD on membrane life needs special evaluation. Ejik's engineers have a standard method for evaluating the conditions of membrane ingestion, which can clearly inform customers whether the water quality is suitable for the use of membrane ammonia removal.

Balance of material is simple. The water quality of membrane ammonia removal is simple and there are many ways out. The mother liquor of ammonium salt can be used in the evaporator.

The system has high performance. The water quality is simple and the system design is easy.

3. Ammonia Removal from Coal Chemical Wastewater

This application covers the following industries: coking, new coal chemical industry, chemical fertilizer (nitrogen fertilizer), etc.

Water quality characteristics: high ammonia nitrogen content (600-3000ppm), high COD content (1000-6000ppm), alkaline PH, suspended solids

Membrane ammonia removal adaptability: to be evaluated

Effectiveness needs assessment. The traditional process is ammonia evaporation. Membrane life is affected by other pollutants in raw water. The pretreatment of membrane ammonia removal is more stringent, and the economy of membrane ammonia removal needs to be evaluated. Ultrafiltration is generally used as pretreatment. If the membrane life can reach 2 years, the economy will be very good.

Balance of materials is complex. Coal chemical wastewater treatment process is complex, wastewater pollutants, long treatment process. How to replace ammonia evaporation by membrane deamination, how to treat the mother liquor of ammonium salt produced, and how to link up with other processes need to be reconsidered in plant design. The active participation of the owner is the key to the success of the project.

Uh-huh, we need superb performance design technology. Coal chemical industry is generally large-scale industrial production, which requires high performance. There are many factors affecting the performance and life of membrane in wastewater, so rich engineering experience and superb failure prevention design technology are needed. Ejik can provide strong technical support for large chemical design institutes.

4. Ammonia removal from high COD wastewater

This application covers a wide range of industries, such as fine chemicals, pharmaceuticals, landfill leachate, etc.

Water quality characteristics: high ammonia nitrogen content (1000-20000 ppm), high COD content (20000-30000 ppm)

Membrane ammonia removal adaptability: to be evaluated

The economy needs to be evaluated. At present, in practical engineering cases, Ejik membrane can still maintain a lasting hydrophobicity and removal effect in 80,000 ppm biochemical wastewater. However, it does not mean that Ejik membrane can tolerate COD indefinitely. We have refused to allow 1600 ppm of raw water to enter the membrane. Therefore, the specific evaluation results of Ejik engineers are needed to determine whether the membrane can be injected or not.

The technical feasibility needs to be assessed. Generally speaking, it is not only ammonia removal but also the overall solution. Ajik usually works with the overall solution provider to provide the overall solution.