Predicting the potential of sludge dewatering liquors to recover nutrients as struvite biominerals

Microbial Phosphorus Removal and Recovery by Struvite Biomineralisation in Comparison to Chemical Struvite Precipitation in Municipal Wastewater

“…The bio-struvite obtained in this study was found of similar purity as previously reported bio-struvite (11.9% P) which was recovered from sludge dewatering liquors, but lower of heavy metal contents, especially the Hg, As and Ni [21]. Furthermore, when comparing with the bio-struvite produced from sewage sludge ash (SSA), which was also proposed as a P-fertiliser alternative recovered from WWTPs, it was observed that the previously described SSA bio-struvite contained lower P content (9.4% P, 10.56% P) but higher toxic/heavy metal contents [37,38].…”

“…Different concentrations of PO 4 -P (5.4-62.4 mg/L, 4-levels) and NH 4 -N (35-332 mg/L, 3-levels) were applied to the filter-sterilised wastewater (Table 1) to explore the significance of initial nutrient concentrations on the microbial capability for P removal and recovery. The concentrations of PO 4 -P, NH 4 -N, Mg 2+ , K + and BSA were selected based on properties of wastewater reported suitable for bio-struvite formation and eligible wastewater sources at WWTPs [17,21].…”

Ammonia removal from mixed dewatering liquors by three different deammonification technologies

“…The total suspended solid (TSS) concentration ranged from 50-600 mg L -1 . The mixed dewatering liquors quality compared others reported at UK WWTPs 20,21 .…”

Evaluation of a Full-Scale Suspended Sludge Deammonification Technology Coupled with an Hydrocyclone to Treat Thermal Hydrolysis Dewatering Liquors

“…Candidatus Scalindua has been previously described in nonengineered ecosystems or saltwater deammonification systems [40]. Dewatering liquors from conventional AD and THP/AD have a high salt of content 5000-6000 µS cm −1 [41,42]. Further to this, a recent study shows the relevance of Candidatus Scalindua in freshwater environments too, demonstrating the versatility and potential underestimation of this genus in deammonification systems [43].…”