From Compliance to Reuse: SINOKLE Oily Wastewater Treatment Case Studies
The value of technology is ultimately demonstrated by solving real problems and creating value for enterprises. With its CDFU + CDOF pure-physical process, SINOKLE has provided oily wastewater treatment solutions to dozens of companies across petrochemical, power generation, shipping and other sectors, earning widespread customer trust through stable treatment performance and significant environmental and economic benefits.
Case 1: Oily produced water treatment at a refining and chemical enterprise (capacity: 1,000 m3/d)
Project background: the enterprise's produced water had a high oil content and was severely emulsified. The conventional "oil separation + flotation + biological treatment" process had low oil removal efficiency and produced large amounts of sludge, the effluent could not reliably meet the standard, and sludge disposal costs were high.
SINOKLE solution: a full-flow pure-physical process combining CDFU cyclonic dissolved-air flotation with CDOF ozone catalytic oxidation.
Treatment performance:
Effluent oil content stable below 5 mg/L, COD below 100 mg/L and SS below 30 mg/L, meeting Grade 1 of the Integrated Wastewater Discharge Standard; part of the effluent was reused in the circulating cooling water system, with a reuse rate of 60%.
No chemical addition and no oily sludge generation throughout the process, completely solving the sludge disposal problem.
Customer benefits:
Annual savings on chemical procurement and sludge disposal were significant, and total operating cost fell by more than 50%.
Circular utilisation of water resources was achieved, with considerable annual savings in fresh water consumption and sound economic returns.
Environmental compliance was met, avoiding the risk of environmental penalties and enhancing the company's green image.
Case 2: Oily wastewater treatment at a thermal power plant (capacity: 500 m3/d)
Project background: the plant's oily wastewater fluctuated widely in oil content and was highly emulsified. The conventional process had weak shock resistance and unstable effluent, and it occupied a large footprint with high operation and maintenance costs.
SINOKLE solution: a combined process of a high-efficiency coalescing de-oiler plus CDFU cyclonic dissolved-air flotation, paired with an intelligent control system.
Treatment performance:
Effluent oil content stable below 3 mg/L, meeting the reuse standard; all of it was reused for plant landscaping and road washing, achieving "zero discharge".
Small equipment footprint and a short installation and commissioning period.
The intelligent control system enables automatic operation and remote monitoring with no dedicated staffing, greatly improving operation and maintenance efficiency.
Customer benefits:
Noticeable annual savings in fresh water and sludge disposal costs.
Lower equipment failure rates and significant annual savings in operation and maintenance labour costs.
"Zero discharge" of wastewater was achieved, helping the company meet its environmental assessment targets and gain recognition from the local environmental authority.
Case 3: Ship bilge water treatment at a shipping company (per-vessel capacity: 30 m3/d)
Project background: the company's ship bilge water was severely emulsified with a high oil content. Conventional treatment equipment was inefficient and complex to maintain, making it hard to meet the IMO discharge standard and exposing the company to voyage restrictions and penalty risks.
SINOKLE solution: a three-stage compact process of CDFU + KFM filtration + CDOF, with skid-mounted equipment design.
Treatment performance:
Effluent oil content stable below 15 mg/L, meeting the IMO MEPC.107(49) standard and suitable for direct discharge or reuse.
Small size and light weight, installed in a corner of the ship's engine room without occupying core space.
A pure-physical process with no chemicals and no sludge and with simple maintenance, well suited to long-term shipboard operation.
Customer benefits:
The problem of meeting discharge standards for shipboard oily water was fully solved, avoiding the risk of international environmental penalties.
Long equipment service life and low annual maintenance cost.
Enhanced environmental credentials for the fleet and greater market competitiveness.
SINOKLE value summary: three core strengths that empower sustainable customer development
1. Technical strength: independently developed CDFU and CDOF core technologies, a pure-physical process with no chemicals and no sludge, high treatment efficiency and stable effluent.
2. Customisation strength: solutions tailored to different industries and water qualities, adaptable to diverse scenarios and meeting both discharge compliance and reuse requirements.
3. Benefit strength: lower operating costs, water resource savings and avoided environmental risk, delivering a win-win outcome for both environmental protection and economic performance.
In the future SINOKLE will continue to deepen innovation in oily wastewater treatment technology and, with more efficient and more environmentally friendly processes, provide quality solutions to more enterprises and help industrial environmental governance reach new heights.
