[Nitrogen removal in a pilot-scale zeolite reed bed system]

Area of Science:

• Environmental Engineering
• Water Treatment Technologies
• Wastewater Management

Context:

• Agricultural and domestic wastewater pose significant environmental challenges due to high nitrogen content.
• Conventional wastewater treatment methods often struggle with efficient nitrogen removal.
• Reed bed systems offer a sustainable approach to wastewater treatment.

Purpose:

• To evaluate the nitrogen removal efficacy of a pilot-scale zeolite reed bed system for agricultural and domestic wastewater.
• To compare the performance of zeolite reed beds with traditional gravel reed beds.
• To identify the primary mechanisms responsible for nitrogen removal in zeolite reed beds.

Summary:

• The pilot-scale zeolite reed bed system demonstrated significant nitrogen removal, with total nitrogen, ammonia, nitrate, and nitrite reductions varying by season.
• System performance was notably better in spring compared to winter, indicating seasonal influences on treatment efficiency.
• Zeolite reed beds exhibited superior removal rates for total nitrogen, ammonia, and nitrate compared to gravel reed beds.
• Key nitrogen removal mechanisms include ammonia adsorption and ion exchange by zeolite, alongside biological nitrification and denitrification.

Impact:

• Zeolite reed beds represent a promising, enhanced technology for efficient nitrogen removal from wastewater.
• Findings provide valuable data for optimizing reed bed system design and application in wastewater treatment.
• This research contributes to developing more sustainable and effective solutions for managing nitrogen pollution in water bodies.