This paper presents a unique approach for magnesium dosage in struvite precipitation by Mg metal corrosion. The experimental results showed that using an air bubbling column filled with Mg metal and graphite pellets for the magnesium dosage was the optimal operation mode, which could significantly accelerate the corrosion of the Mg metal pellets due to the presence of graphite granules. The rea...

This paper aimed to process phosphate from laundry waste be struvite crystal by precipitation and crystallization methods. In general, phosphates are difficult remove conventional treatment technologies. Therefore, methods can an alternative choice for recovery. Precipitation adding KOH serve dissolved content in wastewater, as well convert it into a solid form that reused industrial raw materi...

Struvite formed from digested poultry slurries can serve as an alternative to chemical fertilizers; however, the biological safety of such products is questionable. Therefore, quantification and inactivation foodborne pathogens existing in struvite are important. Herein, dynamics pathogens' (Streptococcus faecalis, S. typhimurium, Clostridium perfringens, Escherichia coli) living status, whethe...

The removal and the recovery of nutrients, namely nitrogen (N) and phosphorus (P) from anaerobically digested and solid-liquid separated manure effluents via struvite precipitation were investigated. Both the liquid and the solid phases of the poultry manure digester effluent were subjected to struvite precipitation experiments. The Mg:N:P molar ratio of 1:1:1 in the liquid phase resulted in an...

Hydroponic systems are an attractive form of urban agriculture due to their low weight load, inert substrate conditions, and overall better control plant nutrition growth. However, gaining food sovereignty cannot be at the cost increasing environmental impacts, such as eutrophication nonrenewable resource depletion, associated with phosphorus fertilizer use. Struvite, a wastewater byproduct, is...

Some treatment plants in operation have not been designed to fulfill the required standards of phosphorus removal. A possibility to upgrade the efficiency of phosphorus removal could be elimination of the phosphorus returned with sludge processing liquors by releasing and recovering from sewage sludge. The phosphorus recovery can occur from sewage sludge by chemical methods or from supernatant ...

One of the main challenges for one phase anaerobic digestion processes is the high concentration of NH4 and PO4 ions in the digested sludge supernatant. This project focuses on enhancing the removal of nutrients during the anaerobic digestion process through fixing both NH4 and PO4 ions in the form of struvite (magnesium ammonium phosphate, MAP, MgNH4PO4.6H2O) within the anaerobic sludge. Batch...