Overview

Industrial ammonia-nitrogen wastewater primarily comes from fertilizer production, coking, petrochemicals, pharmaceuticals, food processing, and landfills. This wastewater poses significant risks to human health and ecosystems. The project treats and recovers 1,200m³/day of high-hardness manganese-containing wastewater with ammonia-nitrogen, aiming for regulatory-compliant discharge while maximizing resource recovery and water reuse.

Pre-Treatment + Membrane Filtration System To address this challenge, Huachuang Group has developed and implemented an advanced “Pre-Treatment + Membrane Filtration System”with flexible operation, mild reaction conditions, and a compact design that minimizes space requirements. With high automation enhancing efficiency and rapid deployment ensuring quick production and installation, the system delivers a cost-effective and sustainable solution for wastewater treatment.

Process Description Filtration & Reuse System：The “Self-cleaning filter + UF1 + RO1 + RO2” process is applied to treat manganese-containing wastewater, ensuring high-quality purification. The RO2 membrane permeate meets reuse water quality standards, allowing for either discharge or reuse. Recovery & Treatment of Metallic Manganese: The RO1 membrane concentrate undergoes a pre-treatment and multi-stage filtration process, including hardness removal pre-treatment, flotation, microfiltration, UF2, NFR, and RON. The RON-treated effluent is recirculated into the RO2 membrane system for further purification, while the NFR concentrate, with a manganese concentration of approximately 8g/L, is returned to the electrolytic manganese production system for metal recovery.

Technical Features

•  Simple & Continuous Pre-Treatment – Low chemical consumption, cost-efficient operation, and minimal sludge generation.

•  Stable System Performance – High anti-fouling capability, stable water quality, and strong resistance to external fluctuations.

•  Sustainable & Emission-Free – Operates at pH 5-7, preventing ammonia odors and secondary air pollution.

•  Compact, Modular & Scalable Design – Fully integrated, mobile, and easily replicable, allowing for quick production and installation.

•  High Automation & Easy Maintenance – Ensuring efficient operation with minimal maintenance requirements.

•  Resource Recovery & Utilization – Enables efficient recovery of manganese, ammonia nitrogen, and water, maximizing resource reutilization.

Technical Advantages

•  Closed-Loop Water Recycling – Permeate and concentrate are maximize reused in production processes.

•  Resource Recovery – High-concentration manganese and ammonia nitrogen are reclaimed and reintegrated into production, preventing resource wastage.

•  Low Operational Costs – Minimal chemical use, low sludge generation, and savings from recovered manganese and ammonia nitrogen.

*Analysis of Inlet & Outlet Flow, Conductivity, Water Recovery Rate, Effluent Ammonia Nitrogen, and Operating Costs