Sugar Industry Waste Water Case Study
6. TREATMENT METHODS
Screening, grit removal, flow equalization, sedimentation, or dissolved air flotation are used to reduce suspended solids (SS) load from sugar industry wastewater. Biological treatment includes aerobic and anaerobic process. Except biological methods, physico-chemical methods are also used for sugar industry wastewater treatment.
6.1 Biological methods
Since, sugar industry wastewater contains mostly sugars and volatile fatty acids, which are easily biodegradable, therefore all the biological (anaerobic and aerobic) treatment processes are suitable [22]. Table 3 summarizes the reported literature of biological treatment for sugar industry wastewater treatment.
6.1.1 Anaerobic treatment
Treatment method Opportunities Limitations
Anaerobic •Small reactor size
•Less energy required
•Excess sludge low
•Up to 90% of VSS removal
• Energy production
• High COD loading
• Effluent quality good (in terms of COD) •Oil and grease are not easily degraded
• Partly degrades organics
• Post-treatment of effluent is often required
Anaerobic treatment method for concentrated wastewater, in terms of pollutants (as the sugar industry wastewater), is widely used method in the industries. It has several advantages over aerobic processes, which include the lesser energy required; methane production due to the degradation of organic …show more content…
Therefore, an additional biological treatment stage is needed. Hybrid systems of comprising anaerobic and aerobic treatments have been approved capable of giving high COD removal efficiency with smaller required energy [5,10,14]. Yang et al. [48] reported a combined anaerobic (UASB) and aerobic (EAFB) treatment system for effluent from primary treatment of sugarcane mill wastewater for its application for drip irrigation, and P99% organics and solids removal were reported at HRT of 2d. This treated wastewater hold better water quality for drip
Screening, grit removal, flow equalization, sedimentation, or dissolved air flotation are used to reduce suspended solids (SS) load from sugar industry wastewater. Biological treatment includes aerobic and anaerobic process. Except biological methods, physico-chemical methods are also used for sugar industry wastewater treatment.
6.1 Biological methods
Since, sugar industry wastewater contains mostly sugars and volatile fatty acids, which are easily biodegradable, therefore all the biological (anaerobic and aerobic) treatment processes are suitable [22]. Table 3 summarizes the reported literature of biological treatment for sugar industry wastewater treatment.
6.1.1 Anaerobic treatment
Treatment method Opportunities Limitations
Anaerobic •Small reactor size
•Less energy required
•Excess sludge low
•Up to 90% of VSS removal
• Energy production
• High COD loading
• Effluent quality good (in terms of COD) •Oil and grease are not easily degraded
• Partly degrades organics
• Post-treatment of effluent is often required
Anaerobic treatment method for concentrated wastewater, in terms of pollutants (as the sugar industry wastewater), is widely used method in the industries. It has several advantages over aerobic processes, which include the lesser energy required; methane production due to the degradation of organic …show more content…
Therefore, an additional biological treatment stage is needed. Hybrid systems of comprising anaerobic and aerobic treatments have been approved capable of giving high COD removal efficiency with smaller required energy [5,10,14]. Yang et al. [48] reported a combined anaerobic (UASB) and aerobic (EAFB) treatment system for effluent from primary treatment of sugarcane mill wastewater for its application for drip irrigation, and P99% organics and solids removal were reported at HRT of 2d. This treated wastewater hold better water quality for drip