Саноатда рақамли технологиялар 4-том 1-нөмір (2026) · 197-202-беттер
PRODUCTION OF ORGANO-MINERAL FERTILIZERS BASED ON OFF-GRADE PHOSPHORITES AND SEWAGE SLUDGE
Mukhammatova, Umida Khusankizi, Temirov, Uktam Shavkatovich, Sharipov, Sanat Shuhratugli, Takhirova, Nargiza Bakhiddinovna, Мухамматова, Умида Хусанкизи, Темиров, Уктам Шавкатович, Шарипов, Санат Шухратугли, Тахирова, Наргиса Бахиддиновна, Muxammatova, Umida Xusanqizi, Temirov, O‘ktam Shavkatovich, Sharipov, San’at Shuxrat o‘g‘li, Taxirova, Nargisa Baxriddinovna
Аңдатпа
This study investigates the feasibility of producing organo-mineral fertilizers based on off-grade phosphorite mineralized mass and sewage sludge generated at biochemical municipal wastewater treatment facilities. Phosphorite–sludge mixtures were prepared at mass ratios ranging from 90:10 to 30:70 and chemically treated with 30% sulfuric acid at 50–90% of the stoichiometric requirement relative to calcium oxide. The resulting slurries were separated into liquid and solid phases, and the contents of total P₂O₅, organic matter, humic acids, and fulvic acids were determined. The results showed that increasing the phosphorite fraction led to higher phosphorus levels, whereas increasing the sludge fraction caused a pronounced rise in organic matter, particularly fulvic acids in the liquid phase. A higher sulfuric acid dosage enhanced phosphorus transfer to the liquid phase and promoted the formation of stable complexes with organic components. The study provides scientific justification for producing a fast-acting liquid fertilizer enriched with fulvic acids, as well as a slow-release solid organo-mineral fertilizer dominated by humic acids.
phosphoritesewage sludgeorgano-mineral fertilizerssulfuric acidhumic acidsfulvic acidsфосфоритосадки сточных водорганоминеральные удобрениясерная кислота
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