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PUC engineers outline biosolids, drying and disinfection technologies under SSIP study
Summary
At the July 27 SSIP workshops, PUC engineers summarized technologies under consideration for biosolids handling and treatment—thermal hydrolysis (CAMBI), solar/thermal drying, co‑digestion of fats/oils/grease, biosolids‑to‑fuel, UV disinfection and nutrient recovery—and recommended pilots and strict proof‑of‑operation before large investments.
San Francisco wastewater engineers presented a technology review on July 27 that cataloged alternatives staff and consultants have pilot‑tested or evaluated for inclusion in the Sewer System Improvement Program.
Humphrey Ho, sanitary engineer, reviewed a menu of technologies: thermal hydrolysis pretreatment (CAMBI) for improved digestion and pathogen reduction; novel low‑temperature drying and solar thermal panels; deep‑well injection…
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