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Overview of Industrial Wastewater Treatment
Introduction
What is industry wastewater？Industry wastewater is generated from one or more indutrial processes. It has to be pretreated and / or ultimate treated to meet the required quality stipulated pertinent licenses befor being discharged into receiving water body.
Main features of industral wastewater
- Highly industry and site-specific
- Great variation in both quantity and quality
- Containing various toxic pollutants at high levels
- Limited financial resources
Main pollutants in industrial wastewater
- Soluble organic matters—biodegradale(biological treatment) and non-biodegradale(physical/chemical treatment)
- Total suspended solids (TSS)
- Priority organic pollutants
- Priority heavy metal
- Volatile organic compounds (VOCs)
- Nitrogen(Org-N,NH4+ or NO3–)
- Phosphorus (Total Phosphorus )
- Oil & Grease
- Color & Odor
- Recalcitrant compound
- Coliforms
Recommended processing method for food industry
conversion of ppm to mg/L, ckck here!
| FOOD INDUSTRIES | STRARCH | BACKERY | SOYBEAN SAUCE | CANNERY | |
| Main Features | FLOW RATE (m3/day) | 100-1000 | 10-200 | 50-500 | 10-200 |
| pH | 6-9 | 6-8 | 6-8 | 6-8.5 | |
| BOD(mg/L) | 500-5000 | 100-500 | 40-400 | 200-600 | |
| SS(mg/L) | 1000-3000 | 100-200 | 200-400 | 100-200 | |
| RECOMMENDED TREATMENT | SBR/MBR | contact areation/SBR/MBR | coagulation/SBR +post-treatment | Dissolved air flotation/ coagulation/UASB | |
Recommended treatment for other industry
| INDUSTRIES | Oil refinery | Pharmaceutical | Pulp & Paper | Textile Dye | |
| Main features | Major pollutants | VOC,O&G | toxic organic compounds | SS | Refractory organic matter,color |
| FLOW RATE (m3/day) | 1000-10000 | 500-5000 | 100-5000 | 1000-10000 | |
| pH | 2-11 | 2-11 | 1-12 | 3-12 | |
| BOD(mg/L) | 200-2000 | 50-2500 | 500-1200 | 10-600 | |
| SS(mg/L) | 300-500 | 200-800 | 50-1000 | 20-200 | |
| RECOMMENDED TREATMENT | air flotation/ air stripping/ ASP,MBR | chemical pretreatment+ biotreatment+ post-treatment | sedimentation/ neutralization/ ASP | neutralization/ chemical treatment/ adsorption/ ASP | |
