TITLE:
Recovery of Biomass Incinerated as Struvite-K Precipitates Followed Aluminium Removal
AUTHORS:
Endar Hidayat, Hadi Imran A. Halem, Yoshiharu Mitoma, Hiroyuki Harada
KEYWORDS:
Struvite-K, Recovery of Biomass Waste, Coffee Husk, Sludge Waste, Precipitates
JOURNAL NAME:
Green and Sustainable Chemistry,
Vol.11 No.3,
August
13,
2021
ABSTRACT: Phosphorus
(P) and potassium (K) are non-renewable materials and widely in many industries such as agricultural sectors. On the other hand, the demand of P and K as fertilizers increases which
following global population. The nutrient source of P and K which get from
biomass waste i.e. incinerated of activated sludge and
coffee husk biochar, respectively. The present study was conducted recovery of
P and K as struvite-K (KMgPO4·6H2O)
precipitates. The results showed that aluminium was released simultaneously with P from incinerated activated
sludge with precipitate of Al:P of 1:1, K:P of 0.5, and Mg:P of 3. However,
aluminium was inhibited to form struvite-K. Then, we examined cation removal
especially for removed Al by dissolved 0.5 M HNO3 and the solution was
mixed with KH2PO4 and MgCl2·6H2O
as source of K and Mg, respectively. The
results showed aluminium (Al) was removed with precipitate K:P of 0.5, and Mg:P of 0.8. This study was
confirmed that recovery of biomass incinerated was successful as struvite-K and can be used as fertilizers.