{"id":5388,"date":"2025-12-11T02:51:09","date_gmt":"2025-12-11T02:51:09","guid":{"rendered":"https:\/\/regenerative-thermal-oxidizers.com\/?p=5388"},"modified":"2025-12-11T02:51:09","modified_gmt":"2025-12-11T02:51:09","slug":"rto-for-soft-capsule-injection-extract-concentration","status":"publish","type":"post","link":"https:\/\/regenerative-thermal-oxidizers.com\/ru\/rto-for-soft-capsule-injection-extract-concentration\/","title":{"rendered":"RTO for Soft Capsule\/Injection Extract Concentration"},"content":{"rendered":"
\n
\n

RTO for Soft Capsule\/Injection Extract Concentration<\/h1>\n

How our regenerative thermal oxidizer system efficiently handles acetone, ethanol, and other VOCs from solvent recovery processes\u2014while achieving >99% DRE and maximizing energy efficiency in real-world pharmaceutical applications.<\/p>\n<\/div>\n

\n

When it comes to softgel and injectable extraction and concentration, you know the drill. Acetone, ethanol, and other solvents are essential for extracting active ingredients and concentrating solutions. But here’s where things get tricky: these solvents off-gas during the process, creating a volatile cocktail of VOCs that need to be captured and destroyed. We’ve seen facilities struggle with peak concentrations ranging from 10\u2013100 g\/Nm\u00b3\u2014levels that can easily exceed safety limits if not properly managed. And let\u2019s not forget about the regulatory pressure. Under US EPA\u2019s NESHAP Subpart GG, emissions from extraction operations must be controlled to meet stringent destruction removal efficiencies (DRE).<\/p>\n

The challenge isn\u2019t just about hitting DRE targets\u2014it\u2019s about doing so while managing concentration spikes and maintaining safety. Most standard RTO systems aren\u2019t equipped to handle these peaks without risking an explosion. The trick? Condensing and recovering solvents before they enter the RTO. In our experience, this approach not only ensures safety but also maximizes thermal efficiency by avoiding unnecessary fuel consumption.<\/p>\n

Understanding Your Process Emissions<\/h2>\n

Each step in the extraction and concentration process emits different compounds:<\/p>\n

\n\n\n\n\n\n\n\n
Process Step<\/th>\nKey VOC Components<\/th>\nTypical Flow & Concentration<\/th>\nUnique Challenge<\/th>\n<\/tr>\n<\/thead>\n
Initial Extraction<\/td>\nAcetone, ethanol<\/td>\n50k\u2013100k Nm\u00b3\/h | 20\u201340 g\/Nm\u00b3<\/td>\nHigh volatility requires efficient capture<\/td>\n<\/tr>\n
Concentration Phase<\/td>\nEthanol, methanol<\/td>\nVariable flow | peaks up to 100 g\/Nm\u00b3<\/td>\nSudden VOC spikes require rapid dilution<\/td>\n<\/tr>\n
Cooling and Storage<\/td>\nLow VOC content<\/td>\nReduced airflow | low concentration<\/td>\nEnergy-efficient operation needed<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

VOC concentrations can vary significantly depending on the phase of the process. During initial extraction, the exhaust stream contains significant amounts of acetone and ethanol. These highly volatile solvents require efficient capture to prevent environmental release. Our solution? Pre-condensation to recover valuable solvents before they reach the RTO. This not only reduces the load on the RTO but also recovers solvents that can be reused, saving costs.<\/p>\n

Navigating Regulatory Compliance Across Continents<\/h2>\n

Compliance isn’t one-size-fits-all. Catalent in the USA has to adhere to strict US EPA guidelines, including a minimum DRE of 99% for all HAPs. Meanwhile, Rottendorf in Germany operates under TA-Luft regulations, which set limits on total organic carbon (TOC) emissions. In Vietnam, DHG Pharma follows local regulations that cap NMHC at 10 mg\/Nm\u00b3 for new installations. And then there’s China, where GB 31572-2015 mandates benzene levels below 1 mg\/Nm\u00b3\u2014a benchmark many plants struggle to meet consistently.<\/p>\n

We worked with a facility in South Africa where local regulations required biannual stack tests. Their previous system barely met standards, leading to constant anxiety about potential fines. By switching to our regenerative thermal oxidizer with integrated LEL monitoring and condenser recovery, they achieved consistent compliance\u2014without sacrificing operational flexibility.<\/p>\n

Why Standard Two-Bed RTOs Fall Short in Pharmaceutical Applications<\/h2>\n

We\u2019ve seen numerous failures firsthand. Common issues?<\/p>\n