The petrochemical industry is the pillar of modern industry and also one of the most typical representatives of industrial wastewater pollution. Its wastewater is not only extremely complex in composition, but also contains a large amount of difficult-to-degrade organic matter, oils, volatile compounds and heavy metals. It is one of the industrial sectors recognized to be difficult to manage and has great environmental pressure.
Main characteristics of wastewater:
Complex composition and wide sources: The sources of wastewater cover multiple processes such as crude oil desalination, catalytic cracking, coking, distillation, and chemical synthesis, and contain phenols, sulfides, ammonia nitrogen, hydrocarbons, acids and alkalis and other types of pollutants.
High pollutant concentration: Typical COD concentration is 1,500–8,000mg/L, oil substances reach 200–800mg/L, ammonia nitrogen is often 100–300mg/L, and some special wastewater is even extremely toxic.
Strong biological toxicity and poor biodegradability: Contains BTEX, aromatic hydrocarbons, organophosphorus and other substances, which are highly inhibitory to conventional microbial systems, and the BOD/COD ratio is often lower than 0.3, making it difficult to directly biodegrade.
High volatility and high discharge requirements: Production is highly intermittent, the amount of discharged water and water quality fluctuate violently, and the effluent must meet the national special limit or industry ultra-high standards, which poses huge technical challenges.
For the quality-based treatment of oily wastewater, desalination wastewater, coking wastewater, synthetic wastewater, etc., a combination process of oil separation + flotation + advanced oxidation + physicochemical reaction + multi-stage biochemical (A/O, SBR, MBR) is adopted to accurately adapt to the characteristics of wastewater.
Integrate Fenton, ozone oxidation, catalytic wet oxidation (CWAO), activated carbon adsorption, reverse osmosis membrane system, etc., to ensure that multiple indicators such as COD, ammonia nitrogen, total phosphorus, volatile phenols, etc. are stable and better than industry emission standards.
Select and breed toxic and oil-resistant bacteria to build a highly stable microbial system. The system has strong impact load resistance, long operation cycle and excellent effluent water quality.
Equipped with a cloud data platform, it realizes full-process monitoring, intelligent early warning, and adaptive operation adjustment to ensure continuous and stable operation and data compliance.
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