Struvite production from food processing wastewater and incinerated sewage sludge ash as an alternative N and P source: Optimization of multiple resources recovery by response surface methodology

Zin, Moh Moh; Kim, Dong-Jin

doi:10.1016/j.psep.2019.04.018

Cited by 51 publications

(13 citation statements)

References 37 publications

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“…So, the leaching with an acid that has a high P extraction capacity, which is not preferred in literature for SSA due to metal leaching, 62,63 may be a good solution for P-recovery from RHPLA for fertilizer applications, because the main limitation is only provided by Zn concentration in the solution. The P thus extracted may undergo the same treatments already studied for SSA, 64,65 and recently proposed for poultry manure, 66 to obtain a novel product and a novel eco-material for the fertilizer industry. It is evident that the proposed procedure is suitable to promote P separation before proceeding with silica recovery and the two stages can be studied with a mutual approach as already achieved for SSA.…”

Section: Acid Leachate Characterisationmentioning

confidence: 99%

Simultaneous amorphous silica and phosphorus recovery from rice husk poultry litter ash

et al. 2021

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Section: Acid Leachate Characterisationmentioning

confidence: 99%

Simultaneous amorphous silica and phosphorus recovery from rice husk poultry litter ash

et al. 2021

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Section: Introductionmentioning

confidence: 99%

“…The high amounts of ES produced in wastewater treatment plants poses a problem related with its final disposal. Therefore, it is very important to find out a secure, reasonable and high-efficiency sludge utilization way 3,4 .The most common disposal processes for ES include landfilling, agricultural application, incineration and pyrolysis 5,6 . Most of processes are becoming increasingly difficult to operate, due to land limitations and more restrictive regulations.…”

mentioning

confidence: 99%

Residual and ecological risk assessment of heavy metals in fly ash from co-combustion of excess sludge and coal

Tang

Pan

Li³

et al. 2021

Sci Rep

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Co-combustion of municipal excess sludge (ES) and coal provides an alternative method for disposing ES. The present study aims to investigate the residual and ecological risk of heavy metals in fly ash from co-combustion of ES and coal. The total concentration and speciation distribution of heavy metals, characterization of SEM, EDX, XRD and leaching test were carried out to assess the fly ash in this study. The results showed that the total concentrations of Cu, Zn and Mn were higher than others in fly ash, and most heavy metals were concentrated in fine particles. For Cd, Cr and Pb, the percentages of speciation of F4 and F5 were all over 90%, suggesting the relatively lower leaching toxicity. The leaching percent of all heavy metals was lower than 5% by two diluted HNO3 solutions for fly ash. The potential ecological risks increased with the decrease of particle size of fly ash, and Cd accounted for the main fraction for ecological risk despite of lower concentration in comparison to other measured heavy metals.

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“…The nutrients’ composition in the products was analyzed for the total concentration of elements using a standard method of multi-elements analysis (USEPA method 3051) [ 31 ]. The evaluation of products as fertilizer was assessed by a germination test and nutrient dissolution in citric acid 2% adjusted at pH 6 with NaOH 6N [ 32 , 33 ].…”

Section: Methodsmentioning

confidence: 99%

Nutrients Recovery from Dairy Wastewater by Struvite Precipitation Combined with Ammonium Sorption on Clinoptilolite

et al. 2021

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Struvite precipitation from Wastewater involves an excess of ammonium to create a supersaturated initial solution. The remaining fraction can be a threat to the environment. This work combined struvite precipitation and ammonium sorption using natural zeolite to decrease the ammonium level in the effluent. Two approaches of estimation of feed sample doses were used. One consisted of gradient experiments for ammonium precipitation to the asymptotic level and was combined with clinoptilolite to lower the ammonium level in the effluent. This approach used doses of 0.05:1.51:0.61:1 of Ca:Mg:NH4+:PO43− mole ratios, respectively. In contrast, three level design with narrowed NH4+:PO43− range reached 0.25:1.51:0.8:1 for Ca:Mg:NH4+:PO43− mole ratios. The addition of zeolite decreased effluent ammonium concentration. In both ways, the P and N recoveries were higher than 94% and 72%, respectively. The complexity of the precipitation mixture decreased the ammonium sorption capacity (Qe) of clinoptilolite from Qe of 0.52 to 0.10 meq∙g−1 in single and complex solutions, respectively. Thermodynamically, the addition of 1.5 % of clinoptilolite changed the struvite precipitation spontaneity from ∆G of −5.87 to −5.42 kJ·mol−1 and from 9.66 to 9.56 kJ·mol−1 for gradient and three level experimental procedures, respectively. Thus, clinoptilolite demonstrated a positive effect on the struvite precipitation process and its environmental impact.

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Struvite production from food processing wastewater and incinerated sewage sludge ash as an alternative N and P source: Optimization of multiple resources recovery by response surface methodology

Cited by 51 publications

References 37 publications

Simultaneous amorphous silica and phosphorus recovery from rice husk poultry litter ash

Simultaneous amorphous silica and phosphorus recovery from rice husk poultry litter ash

Residual and ecological risk assessment of heavy metals in fly ash from co-combustion of excess sludge and coal

Nutrients Recovery from Dairy Wastewater by Struvite Precipitation Combined with Ammonium Sorption on Clinoptilolite

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