Method for treating wastewater from shale gas drilling and production based on anaerobic granular sludge biological process
By employing a biological method based on anaerobic granular sludge and utilizing a strategy of adding composite nutrients and osmotic pressure protectants, the problem of microbial activity inhibition in the treatment of high-salinity wastewater was solved, achieving efficient and stable treatment of shale gas drilling wastewater and reducing costs and environmental risks.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- PUYANG TIANDIREN ENVIRONMENTAL PROTECTION TECH CO LTD
- Filing Date
- 2026-03-05
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional biodegradation methods for treating shale gas drilling wastewater suffer from low efficiency due to the inhibition of microbial activity caused by high salinity. Furthermore, physicochemical methods are characterized by high energy consumption, high operating costs, and secondary pollution. Therefore, a new biological treatment strategy is needed to enhance the degradation of wastewater.
A biological process based on anaerobic granular sludge was adopted. By optimizing the addition strategy of compound nutrients, fixatives and osmotic pressure protectants, including gradient salinity acclimatization and nutrient supplementation, the salt resistance and activity of anaerobic granular sludge were improved, and its treatment capacity was enhanced.
It effectively alleviates the inhibitory effect of high-salt environment on anaerobic granular sludge, improves treatment efficiency and stability, reduces the accumulation of volatile acids, achieves simultaneous deep removal of organic matter and nitrogen, reduces nutrient costs, and avoids secondary pollution.
Smart Images
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