1. Compliance Disposal / Utilization Methods for Concentrate

Due to its high pollutant concentration, the concentrated liquid must be prioritized for disposal in compliance with environmental discharge standards, primarily through two methods: direct disposal and resource recovery.

Entrust a professional agency for disposal: If the concentrate has no recycling value and complex composition, it must be handed over to a third-party company with hazardous waste treatment qualifications for disposal through methods such as incineration or solidification landfilling, with the transfer manifest retained for record-keeping.

Reuse in production processes: For concentrated solutions in certain industries (such as electroplating and chemical manufacturing), if the contaminant composition is relatively simple (e.g., containing only salts), they can be returned to the front-end production stages (e.g., replenishing electroplating bath solutions). Prior water quality testing is required to ensure no impact on product quality.

Further reduction treatment: If the volume of the concentrated liquid remains large, it can be further reduced through high-temperature incineration or MVR evaporation equipment to minimize solid waste/hazardous waste quantities and lower final disposal costs.

Compliant Discharge (Specific Scenarios): The concentrated liquid may be directly discharged into municipal sewage treatment plants or natural water bodies only when it is fully compliant with the "Integrated Wastewater Discharge Standard" or industry-specific emission standards, with regular monitoring and retention of test reports required.

II. Compliant Disposal / Reuse Methods for Distilled Water

Distilled water typically has a quality close to pure water and is prioritized for reuse to conserve water resources. If reuse is not feasible, it must be verified whether it meets discharge requirements.

Process Recycling: Can be directly utilized for equipment cooling, product cleaning, and feedwater replenishment (e.g., cleaning water in the electronics industry and auxiliary water in the food industry). It is necessary to monitor indicators such as conductivity and suspended solids based on process requirements.

Auxiliary water usage in the factory area: Used for non-production purposes such as workshop floor cleaning, greenery irrigation, and cooling tower water replenishment, which do not require drinking water standards, thereby reducing treatment costs.

Municipal drainage: If reuse is not required, distilled water, due to its clean quality, can typically be discharged directly into the municipal stormwater or sewage drainage network (local acceptance standards must be confirmed, as some areas require discharge into the sewage network).

Reuse after advanced treatment: If the distilled water still contains trace pollutants (such as volatile organic compounds), it can be purified through advanced treatment processes like activated carbon adsorption and ion exchange to meet higher water quality standards (e.g., drinking water or high-purity production water) for reuse.

III. Core Compliance Highlights

Regardless of the chosen method, the following principles must be adhered to in order to avoid violations:

Water Quality Testing First: Before disposal or reuse, a qualified testing agency must be commissioned to analyze the types and concentrations of pollutants in the concentrated liquid, as well as the purity of distilled water and the residual pollutant levels.

Retention of supporting documents: For entrusted disposal, hazardous waste transfer manifests must be retained; for reuse, water quality test reports and reuse records must be retained; for discharge, compliance with local environmental protection authorities' discharge permit requirements is mandatory.

Comply with industry standards: Different industries have specific requirements (e.g., the food industry must adhere to the "General Standard for Food Production Safety," while the pharmaceutical industry must comply with GMP standards), and disposal plans should be adjusted in accordance with industry regulations.