Future nutrient recovery from sewage sludge regarding three different scenarios - German case study

Sichler, Theresa Constanze; Adam, Christian; Montag, David; Barjenbruch, Matthias

doi:10.1016/j.jclepro.2021.130130

Cited by 26 publications

(7 citation statements)

References 35 publications

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“…As phosphorus limits in the wastewater e uent are signi cantly stricter for WWTPs > 10,000 P.E. (AbwV, 1997), these sludges tend to higher phosphorus loads than those of smaller WWTPs (Sichler et al, 2022). However, for the regarded WWTPs in this study, there are two main reasons for the low phosphorus contents in the sewage sludge.…”

Section: Discussion Of Elemental Contentsmentioning

confidence: 79%

Variation of the element composition of municipal sewage sludges in the context of new regulations on phosphorus recovery in Germany

Sichler

Montag

Barjenbruch

et al. 2022

Preprint

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Phosphorus recovery is obligatory for all sewage sludges with more than 20 g P/kg dry matter (DM) from 2029 in Germany. Nine wastewater treatment plants (WWTPs) were chosen to investigate variations of phosphorus contents and other parameters in sewage sludge over the year. Monthly sewage sludge samples from each WWTP were analyzed for phosphorus and other matrix elements (C, N, H, Ca, Fe, Al, etc.), for several trace elements (As, Cr, Mo, Ni, Pb, Sn) and loss of ignition. Among the nine WWTPs, there are four which have phosphorus contents both above and below the recovery limit of 20 g/kg DM along the year. Considering the average phosphorus content over the year, only one of them is below the limit. Compared to other matrix elements and parameters, phosphorus fluctuations are low with an average of 7% over all nine WWTPs. In total, only hydrogen and carbon are more constant in the sludge. In several WWTPs with chemical phosphorus elimination, phosphorus fluctuations showed similar courses like iron and/or aluminum. WWTPs with chamber filter presses rather showed dilution effects of calcium dosage. As result of this study, monthly phosphorus measurement is highly recommended to determine whether a WWTP is below the 20 g/kg DM limit.

show abstract

Section: Discussion Of Elemental Contentsmentioning

confidence: 79%

Variation of the element composition of municipal sewage sludges in the context of new regulations on phosphorus recovery in Germany

Sichler

Montag

Barjenbruch

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…As phosphorus limits in the wastewater effluent are significantly stricter for WWTPs > 10,000 P.E. [ 5 ], these sludges tend to higher phosphorus loads than those of smaller WWTPs [ 30 ]. However, for the regarded WWTPs in this study, there are two main reasons for the low phosphorus contents in the sewage sludge.…”

Section: Discussionmentioning

confidence: 99%

“…It is therefore for several WWTPs unclear whether they are affected by the recovery obligation or not. An evaluation of sewage sludge data from 1478 German WWTPs showed that 40% of the WWTPs have sewage sludges with phosphorus contents below 20 g/kg DM which is equal to 30% of the sludge [ 30 ]. However, phosphorus values per plant were single annual values to maximum four values per year.…”

Section: Introductionmentioning

confidence: 99%

Variation of the element composition of municipal sewage sludges in the context of new regulations on phosphorus recovery in Germany

et al. 2022

Self Cite

View full text Add to dashboard Cite

Phosphorus (P) recovery is obligatory for all sewage sludges with more than 20 g P/kg dry matter (DM) from 2029 in Germany. Nine wastewater treatment plants (WWTPs) were chosen to investigate variations of phosphorus contents and other parameters in sewage sludge over the year. Monthly sewage sludge samples from each WWTP were analyzed for phosphorus and other matrix elements (C, N, H, Ca, Fe, Al, etc.), for several trace elements (As, Cr, Mo, Ni, Pb, Sn) and loss of ignition. Among the nine WWTPs, there are four which have phosphorus contents both above and below the recovery limit of 20 g/kg DM along the year. Considering the average phosphorus content over the year, only one of them is below the limit. Compared to other matrix elements and parameters, phosphorus fluctuations are low with an average of 7% over all nine WWTPs. In total, only hydrogen and carbon are more constant in the sludge. In several WWTPs with chemical phosphorus elimination, phosphorus fluctuations showed similar courses like iron and/or aluminum. WWTPs with chamber filter presses rather showed dilution effects of calcium dosage. As result of this study, monthly phosphorus measurement is highly recommended to determine whether a WWTP is below the 20 g/kg DM limit. Graphical Abstract

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“…Various novel technologies of sludge resource recovery are available yet they have not been widely implemented at wastewater treatment plants (WWTPs), such as cellulose, heavy metal, polyhydroxyalkanoate and protein recovery [ [8] , [9] , [10] ]. A typical European WWTP may currently practice energy recovery (through anaerobic digestion) and, increasingly, phosphorus recovery [ 11 ]. In the future, WWTPs are expected to become water resource recovery facilities as part of their efforts to implement circular economy [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Opportunities for resource recovery from Latvian municipal sewage sludge

Zarina,

Mezule

2023

Heliyon

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Future nutrient recovery from sewage sludge regarding three different scenarios - German case study

Cited by 26 publications

References 35 publications

Variation of the element composition of municipal sewage sludges in the context of new regulations on phosphorus recovery in Germany

Variation of the element composition of municipal sewage sludges in the context of new regulations on phosphorus recovery in Germany

Variation of the element composition of municipal sewage sludges in the context of new regulations on phosphorus recovery in Germany

Opportunities for resource recovery from Latvian municipal sewage sludge

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