Product Overview

Ammonia-nitrogen wastewater primarily originates from the discharge of industries such as chemical, metallurgical, coal gasification, coking, tanning, monosodium glutamate, meat processing, and breeding, as well as from leachate from garbage. Ammonia-nitrogen wastewater is also toxic to fish and certain organisms. Additionally, when wastewater containing a small amount of ammonia-nitrogen is recycled in industrial applications, it can corrode certain metals, particularly copper, and promote the growth of microorganisms in water supply pipelines and equipment, leading to the formation of biological scale that can block pipelines and devices.

Domestic ammonia-nitrogen treatment methods include blowing off, chemical precipitation, breakpoint chlorination, ion exchange, biological treatment, and membrane treatment, among others. The ammonia-nitrogen treatment technologies are diverse, but they all have certain issues to varying degrees, such as high investment costs, pollutants requiring secondary treatment, excessive land usage, or susceptibility to environmental factors. These issues affect the application and promotion of ammonia-nitrogen treatment technologies in production.

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

·Mechanism of Action

The principle of the ammonia-nitrogen wastewater treatment technology developed by Zhongxiang Spring Environmental Protection Co., Ltd.: Under the catalysis of a metal catalyst, along with the combined action of photocatalysis technology and chemical catalysis, the NH3 and NH4+ in the wastewater can be effectively oxidized and gradually decomposed into N2 and H2O. The ammonia-nitrogen content in the effluent can be controlled according to the requirements, ensuring compliance with discharge standards and reducing energy consumption. Additionally, the active oxidative molecules can also catalyze the oxidation and degradation of COD in the water, thereby effectively lowering the COD content in the wastewater.

The activation and 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

The initial investment cost is relatively low.

2. New integrated environmental protection and energy-saving technology; small equipment footprint.

3. The operation is stable and reliable, unaffected by environmental temperature, with consistent processing effects, capable of running automatically around the clock for 24 hours.

4. Treat the wastewater itself without introducing new substances, and do not produce sludge or other solid waste.

5. For high-concentration ammonia nitrogen wastewater, the effect is equally significant, and it also has an oxidizing effect on COD, 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 Ammonium Nitrogen Wastewater Treatment Project

Location: Ningxiang City, Hunan Province

Engineering Overview: 200m³/day Ammonium Nitrogen Wastewater Treatment Project

Water Treatment Capacity: 200 m³/day

Inflow NH3-N: 500 mg/L

Inflow pH Value: 7-9

NH3-N Emission Standards: ≤25 mg/L

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

Effluent pH: 7-9

The project treats ammonia nitrogen at an input of 500 mg/L and an output below 15 mg/L, with a daily ammonia nitrogen wastewater treatment capacity of 200 m³/day, making it a typical case study for our company's small to medium-scale industrial ammonia nitrogen wastewater treatment projects.

Our company utilizes a method of metal catalysis and photocatalytic catalytic oxidation to directly activate and decompose ammonia nitrogen in wastewater under certain conditions. This converts ammonia nitrogen in the wastewater 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 area required and a clearly stable treatment effect. Therefore, it can effectively address issues with special wastewater, such as those with high ammonia nitrogen content, exceeding total phosphorus, total nitrogen, COD, colony counts, and complex compositions, in medium and small-scale water volumes.