Sewage Treatment Packaged Plants
Due to consistent effluent complaints
there is a legal responsibility to undertake Sewage Treatment: Comply to RSA general / special standard, EPA or local regulations.
To re-use with the possibility of saving money
Use for irrigation, dust suppression, or industrial process water.
For aesthetic purposes
To prevent bad smells, odours, and related disease outbreaks.
Clients Require Systems That
- Provide consistent effluent compliance – with our products, results can be monitored onsite. Our SAFF unit achieves consistent compliance to effluent specifications.
- Is easy to operate – our SAFF sewage units do not require skilled personnel. Typically, only one operator is required to do checks during the day.
- Is easy to maintain – typical equipment include pumps, blowers, and dosing pumps.
- Offers reduced chemical consumption – only ferric chloride and sodium hypochlorite is required and typical dose rates are very low.
- Has low electrical consumption – less than 0.8 kWh/m3.
- Has low operational costs.
- Is easy to install – our system is designed and fabricated to reduce labour requirements onsite.
Submerged Aerated Fixed Film (SAFF) Configuration, Using Attached Growth Technology
60% energy saving over activated sludge plants
95% BOD/COD
removal
Nutrient removal: ammonia, nitrates, phosphates
Minimal sludge
produced
100% consistent effluence compliant
We have worked on many remote sites with clients facing challenges due to selecting unreliable systems for treating sewage. From our years of experience, we have noted that attached growth technology, utilising the Submerged Aerated Fixed Film (SAFF) configuration, provides reliable operation, and consistent effluence compliance.
SAFF units are ideal for: mining camps, hospitals, shopping centres, schools, holiday resorts and hostels.
Everything You Need To Know To Make An Informed Decision
- Easy to operate, requiring little operator intervention.
- Reduced electrical consumption.
- Consistently compliant effluent quality.
- Very little sludge produced.
- Extremely well suited to remote operations.
- Can handle shock loads.
- Recovers quickly after power outages.
Downstream unit failing due to solids
- Install screen, ensure screen kept clean
Ammonia out of specification: (requires aerobic condition)
- Check system is nitrifying ammonia to nitrates – requires aerobic conditions at DO > 1.0 mg/L
- Nitrification requires adequate retention time and sufficient food. Adequate pH buffering (alkalinity)
Nitrate out of specification: (requires Anoxic condition)
- Biological reduction of nitrate to nitrogen gas is performed by bacteria that live in a low oxygen environment
- Ensure adequate carbon source. Denitrifying bacteria requires a considerable amount of soluble BOD
- Ensure that the nitrification process is working as bacteria cannot denitrify unless first nitrified
- Ensure that the anoxic tank has a DO = 0.0mg/l
Phosphates out of specification:
- Check that Ferric/alum dosing is set up and operating correctly
Biological oxygen demand (BOD) out of specification
- Biochemical Oxygen Demand (BOD) is a measure of how much oxygen is required to biologically decompose organic matter in the water
- Low oxygen concentration
- Low hydraulic retention time
- Physical short circuiting
- Sludge accumulation
- Chemical oxygen demand (COD)
- Biological oxygen demand (BOD)
- Ammonia-Nitrogen (NH4-N)
- Nitrites/Nitrates (NO2/NO3)
- Ortho-phosphate as phosphorus (PO4-P)
- Suspended solids (TSS)
- Microbiological contaminants
- Removes micro-organisms attached to the surface of media (fixed packing, similar to cooling tower media). Ideal for packaged plants.
- A robust operation that can handle shock loads and power outages very well.
- The high-rate biological oxidation process is performed using an extremely efficient SAFF with a very high specific surface area.
- The SAFF sewage treatment plant can deliver a final effluent that is low in COD/BOD, total suspended solids, ammonia, nitrogen, and phosphates.
