Fructose Wastewater Project Summary:
Wastewater type: Fructose-containing wastewater
Technology: Electrochemical oxidation
Electrode/module: Electro oxidation trial module
Test duration: 1.5 hours
Primary target: Chemical Oxygen Demand (COD)
1. TREATMENT CHALLENGE
Fructose-rich wastewater can contain a high concentration of readily oxidizable organic matter, producing a significant COD load. The supplied test data evaluate whether an electro-oxidation module can reduce this organic load within a short batch-treatment period.
Two separate wastewater samples, Sample A and Sample B, were tested for 1.5 hours. The data show that the two samples responded differently, which is important when assessing performance of electrochemical oxidation technology across variable wastewater matrices.
2. Electro Oxidation Treatment Approach
An electro oxidation trial module was used for electrochemical oxidation treatment of Fructose-rich wastewater with high organic loads. COD and cumulative electricity consumption per ton of wastewater were recorded at 0, 0.5, 1.0 and 1.5 hours.
Operating parameters such as pH, current density, electrode area, temperature, conductivity, chloride concentration and hydraulic conditions were not stated in the source worksheet.
3. REPORTED RESULTS
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Sample A
Time COD (mg/L) Reported COD Removal Energy (kWh/t water)
0 h 1,996 0% 0
0.5 h 1,026 49% 4.8
1.0 h 1,138 43% 9.6
1.5 h 659 67% 14.4
Sample B
Time COD (mg/L) Reported COD Removal Energy (kWh/t water)
0 h 617 0% 0
0.5 h 571 8% 4.8
1.0 h 359 42% 9.6
1.5 h 172 72% 14.4
4. PERFORMANCE INTERPRETATION
The electro oxidation process achieved substantial COD reduction in both wastewater samples after 1.5 hours.
For Sample A, COD decreased from 1,996 mg/L to 659 mg/L, corresponding to approximately 67% removal. The COD value at 1.0 hour was higher than at 0.5 hour (1,138 vs. 1,026 mg/L), indicating non-monotonic analytical behavior during the test. This may reflect sampling variation, intermediate oxidation products, analytical variability, or wastewater heterogeneity; the source data alone do not establish the cause.
For Sample B, COD decreased from 617 mg/L to 172 mg/L, reaching the worksheet’s headline performance of 72% COD removal after 1.5 hours.
Both tests reported the same cumulative electricity use of 14.4 kWh per ton of wastewater at 1.5 hours.
5. INDUSTRIAL RELEVANCE
This case demonstrates that electro oxidation can rapidly reduce COD in fructose-containing wastewater without the addition of a chemical oxidant being reported in the test sheet. The different removal profiles of Samples A and B also show why treat-ability testing on the actual industrial wastewater is important before full-scale design.
Potential applications include:
– Pre-treatment before biological treatment.
– Final COD polishing where conventional treatment is insufficient.
– Treatment of concentrated side streams with soluble organic content.
– Use as part of a hybrid process where electro-oxidation is applied only to the most difficult fraction.
6. ENGINEERING NOTES AND DATA LIMITATIONS
The source worksheet does not specify reactor volume, pH, current/current density, electrode area, flow rate, temperature, conductivity, salinity or detailed wastewater composition. Therefore, the test should be treated as a performance case rather than a complete scale-up design basis.
The 72% headline result applies to Sample B. Sample A achieved 67% COD removal at the same 1.5-hour treatment time and reported energy input.
7. KEY TAKEAWAY
An electro oxidation module reduced COD by 67% in one fructose wastewater sample and 72% in another within 1.5 hours, at a reported cumulative electricity consumption of 14.4 kWh per ton of wastewater.