Solution：Provided year-round Environmental Steward Service tailored to the specific needs of the plant (one strategy per plant), with a focus on cost reduction. MicroMotion®-COD was dosed to resolve insufficient active sludge biomass. Biological enzymes were applied to address nutrient imbalance and mitigate the impact of high concentrations of toxic substances.
Processing Scale：8000m3/d
Treatment Effect：Treatment Effect: Rapid sludge proliferation in the biological treatment tank, fully meeting biochemical process requirements. Achieved 100% compliance throughout the year for discharge indicators including COD, TN, TP, and NH3-N.
Characteristics
(1) Poor biodegradability with low BOD₅
(2) Contains toxic benzene derivatives such as toluene and xylene
(3) Raw water includes carbide slag slurry, with occasional heavy metal contamination
(4) Complex composition with over 20 types of pollutants
(5) Slow growth rate of activated sludge
Description
After on-site communication with production managers, investigation of upstream production units, and evaluation of the operational conditions of each treatment unit, the following issues were identified:
(1) The biological treatment system operated unstably, and effluent failed to meet process standards
(2) The activated sludge in the aerobic tank was severely damaged, resulting in low sludge concentration
(3) The proportion of active biomass in the sludge was low, making it difficult to meet production requirements
(4) Chemical dosing in the pretreatment stage was unreasonable
(5) Some aeration tank equipment was damaged, and the aeration conditions could not meet the process demands
Result
Through the implementation of corresponding solutions, the plant achieved 100% compliance throughout the year for CODcr, ammonia nitrogen, total phosphorus, and total nitrogen. Sludge concentration was maintained above 6.0 g/L, and the MLVSS (Mixed Liquor Volatile Suspended Solids) ratio of activated sludge increased from approximately 30% to around 45%.
With the guidance of our technical personnel, comprehensive operational records and management systems were established, effectively applying scientific, economical, and practical principles. As a result, not only was discharge compliance achieved, but the treatment cost per ton of wastewater was also reduced by 6%.
Periodic Service
