Abstract

A Comparative Study on Human Urine and Anaerobic Septage Supernatant by Struvite Precipitation

Highlights

  • In the past decade, the focus of wastewater engineering has shifted from protecting human health and pollution control to sustainability and resource recovery

  • The results suggest that struvite precipitation is a highly efficient method for removing phosphorus

  • Phosphorus recovery was most efficient with urine because larger amounts of particles were generated with each treatment cycle, and the amount of material remaining trapped in the filter material was negligible

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Summary

Introduction

The focus of wastewater engineering has shifted from protecting human health and pollution control to sustainability and resource recovery. Resources such as ammonia and phosphate are essential for human food supply. Struvite crystallizes in the orthorhombic system as white to yellowish or brownish-white pyramidal crystals in platey mica-like forms. It is a soft mineral with Mohs hardness of 1.5 to 2 and has a low specific gravity of 1.7. Struvite urinary stones and crystal form readily in the urine of humans

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