Product Overview

Ammonium-nitrogen wastewater primarily originates from industrial effluents in sectors such as chemicals, metallurgy, coal gasification, coking, tanning, monosodium glutamate, meat processing, and animal husbandry, as well as from leachate from waste. Ammonium-nitrogen wastewater is also toxic to fish and certain organisms. Additionally, when wastewater containing a small amount of amonium-nitrogen is reused in industrial processes, it can corrode certain metals, particularly copper, and can promote the growth of microorganisms in water conveyance pipelines and equipment, leading to the formation of biological scale and clogging of pipes and devices.

Domestic ammonia-nitrogen treatment methods include blowing off, chemical precipitation, breakpoint chlorination, ion exchange, biological treatment, and membrane treatment. The techniques for ammonia-nitrogen treatment are diverse, yet they all have their own issues, such as high investment costs, pollutants requiring secondary treatment, excessive land use, or sensitivity to environmental factors. This affects the application and promotion of ammonia-nitrogen treatment technologies in production.

In response to the aforementioned issues, Hunan Zhongxiang Chun Tian Environmental Protection Technology Co., Ltd., in collaboration with Central South University, independently developed a short-range, high-efficiency catalytic oxidation process for ammonia nitrogen wastewater treatment. This technology avoids the aforementioned problems, effectively oxidizing and decomposing ammonia nitrogen in wastewater into nitrogen gas while significantly degrading the COD and total phosphorus content.

·Mechanism of Action

The ammonia-nitrogen wastewater treatment technology developed by Zhongxiang Spring Environmental Protection Co., Ltd. operates on the principle that, under the catalysis of metal catalysts and the combined action of photocatalysis and chemical catalysis, NH3 and NH4+ in the wastewater can be rapidly and progressively oxidized and decomposed into N2 and H2O. The technology can control the ammonia-nitrogen content of the effluent according to the specific requirements, ensuring compliance with discharge standards and reducing energy consumption. Additionally, the active oxidative molecules can catalytically oxidize and degrade COD in the water, effectively lowering the COD content in the wastewater.

The activation oxidation mechanism is as follows:

1. In the activation catalytic stage, under the action of an efficient catalyst, water molecules in the wastewater are activated and oxidized to generate hydroxyl radical groups and O3+ molecules.

2. In the reaction phase, under the catalysis of a metal catalyst, NH3 and NH4+ react with the free radicals produced by the catalytic oxidation in the first stage, which are easily oxidized and decomposed into N2 and H2O, thereby meeting the emission standards.

· Product Features

1. Initial investment costs are low.

2. New integrated energy-saving and environmentally friendly technology, with minimal space required for equipment.

3. The operation is stable and reliable, unaffected by environmental temperature, with consistent treatment effects, capable of running automatically 24/7.

4. Treats wastewater solely, without introducing new substances, and does not produce sludge or other solid waste.

5. For ammonia-nitrogen wastewater with high concentration, it shows the same significant effect and has an oxidizing effect on COD as well, achieving the purpose of simultaneous treatment.

Comparison of Our Company's New Ammonia Nitrogen Treatment Technology with Traditional Methods

· Process drawings

· Engineering Case Studies

Project Name: Industrial Ammonia Nitrogen Wastewater Treatment Project

Location: Ningxiang City, Hunan Province

Project Overview: 200 m³/day Ammonia Nitrogen Wastewater Treatment Plant

Water Treatment Capacity: 200 m³/day

Inflow NH3-N: 500 mg/L

Inflow pH Value: 7-9

NH3-N Emission Standard: ≤25 mg/L

Treated NH3-N water quality: 0-15 mg/L

Discharge pH Level: 7-9

This project treats ammonia-nitrogen at an intake of 500 mg/L and an effluent of less than 15 mg/L, with a daily ammonia-nitrogen wastewater treatment capacity of 200 m³/day, making it a typical case study of a medium-to-small-scale industrial ammonia-nitrogen wastewater treatment project for our company.

Our company utilizes a metal catalytic and photocatalytic catalytic oxidation method to directly activate and decompose ammonia nitrogen in wastewater under certain conditions, converting it into non-hazardous N2, which can be directly released into the air without generating solid waste. After wastewater treatment, the ammonia nitrogen content can be reduced to the lower limit of the discharge standard or theoretically to zero. The core advantage of this solution is its short-term, stable, and efficient operation, with minimal land usage and a noticeable stable treatment effect. Therefore, it can effectively address issues for specific wastewater with high ammonia nitrogen content, exceeding total phosphorus, total nitrogen, COD, colony count, and complex composition, especially in medium and small-scale water volumes.