Home Application Cases Engineering and Process Package Cases Retrofit and Reuse Project for a Chemical Company in Anhui Province
Retrofit and Reuse Project for a Chemical Company in Anhui Province

Solution:Bio More®JunoCatalyst Bioreactor package was selected to treat wastewater with high levels of concentration, toxicity, and salinity, and complex composition. It could effectively address influent fluctuations and ensure stable system performance under challenging conditions.

Processing Scale:30m3/d

Treatment Effect:The solution achieved low-carbon emission, rapid retrofit, and stable operational performance. Compared to traditional advanced oxidation technologies such as the Fenton process, it reduced capital investment by 450,000 CNY and cut per-ton operating costs by 80%.

Characteristics

This chemical enterprise primarily produces active pesticide ingredients, formulations, intermediates, and fine chemicals. Its pesticide products include herbicides, fungicides, insecticides, and seed treatments. Key active ingredients include oxyfluorfen, butachlor, quizalofop-P-ethyl, clodinafop-propargyl, fomesafen, pyriminobac-methyl, fluthiacet-methyl, nicosulfuron, paraquat, cyhalofop-butyl, fluoroglycofen-ethyl, fenoxaprop-P-ethyl, etc.

The nature of these products made effluent is highly complex, containing heterocyclic nitrogen compounds, esters, ketones, pyridines, and other large-molecule, poorly biodegradable substances. The wastewater exhibits a certain level of toxicity and is considered a typical kind of wastewater with high concentration, high toxicity, high salinity, and complex composition.


Description

Through an on-site investigation conducted by our technical team, the following issues were identified:

(1) The influent composition was highly complex, and the wastewater exhibited poor biodegradability. Moreover, the pretreatment stage lacked advanced oxidation processes.

(2) Toxic substances posed a risk to the biological treatment system, and high levels of organic nitrogen might lead to ammonia nitrogen exceedances.

(3) Influent pollutant concentrations fluctuated considerably.

(4) The existing treatment process demonstrated limited resilience to shock loads.


Option

Corresponding to the problems observed above, and based on water quality analysis and pilot testing, we recommended that the client adopt our Bio More® JunoCatalyst Bioreactor to specifically treat the high-concentration wastewater discharged from the workshop, instead of constructing new iron-carbon or Fenton-based pretreatment systems.


Result

Bio More®JunoCatalyst Bioreactor COD Performance Data

Date

进水COD(mg/L)

出水COD(mg/L)

COD去除率(%)

5月6日

12536

3492

72.14%

5月7日

13453

4101

69.52%

5月8日

13234

3453

73.91%

5月9日

13285

4918

62.98%

5月10日

15433

3847

75.07%

5月11日

14384

3723

74.12%

5月12日

13847

4123

70.22%

5月13日

14223

3132

77.98%


Conclusion:

Bio More® JunoCatalyst Bioreactor was successfully retrofitted using existing infrastructure, with installation completed in just one week, saving approximately 450,000 CNY. Once the system was in place, only halotolerant bacteria were inoculated without additional chemical reagents. The operational data showed that the pretreatment stage alone achieved a COD removal rate of 62% to 78%, significantly easing the burden on the downstream biological treatment system and ensuring stable compliance at the final discharge outlet. Compared to traditional advanced oxidation processes, the per-ton treatment cost was reduced by at least 80%.

In contrast, traditional iron-carbon and Fenton-based advanced oxidation systems require new construction, entail high upfront capital costs, and rely on carbon plate media that is prone to hardening and costly to replace. Moreover, the Fenton process consumes large quantities of chemicals, produces substantial sludge, and involves high operational costs, posing additional environmental concerns.


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