The wastewater produced during the production process in the chemical industry is complex in composition, has high pollutant concentrations, high salt content, and contains a large amount of difficult-to-degrade substances. Traditional treatment methods are unable to meet the increasingly strict environmental protection requirements. Zero discharge of chemical wastewater has become an inevitable choice for the green development and sustainable development of chemical enterprises. Baohupu Environmental Protection, leveraging its profound technical accumulation and rich project experience in industrial water treatment, provides customized overall solutions for chemical wastewater zero discharge to chemical enterprises.
I. Technical Challenges of Zero Discharge of Chemical Industry Wastewater
Chemical wastewater usually has the following characteristics and is extremely difficult to treat:
The water quality is complex: it contains a variety of toxic and harmful, and difficult-to-degrade organic substances (high COD) as well as heavy metals.
High salt content: The TDS content is high, which imposes a great burden on the biochemical treatment and membrane system.
High volatility: The water volume and quality vary significantly with the production process. Therefore, the treatment system must have a strong ability to withstand shock loads.
II. Core Technology Route for Zero Discharge of Environmental Protection Chemical Wastewater at Baohupu
Given the particularity of chemical wastewater, Baohupu Environmental Protection adopts a combined process of "pre-treatment + membrane concentration + evaporation crystallization", and conducts personalized design:
Strengthen the pre-treatment system
Based on the characteristics of the wastewater, processes such as "advanced oxidation (such as Fenton, ozone catalytic oxidation), micro-electrolysis, and coagulation sedimentation" are adopted to effectively remove COD, toxic substances and improve the biodegradability of the wastewater, thereby reducing the load on the subsequent treatment units.
2. Biological treatment system (if necessary)
For wastewater containing biodegradable organic matter, the improved anaerobic (UASB, IC) and aerobic (MBR, MBBR) processes were adopted to efficiently and stably remove the organic substances.
3. Membrane cascade concentration system
The membrane technology combination of "ultrafiltration (UF) + nanofiltration (NF) + reverse osmosis (RO) / + disc tube reverse osmosis (DTRO)" is adopted. NF can separate monovalent and divalent salts, while RO and DTRO perform high-concentration treatment, maximizing water resource recovery, reducing evaporation, and saving operating costs.
4. Evaporation and Crystallization System
The core adopts MVR mechanical vapor recompression evaporators or multi-effect evaporators to conduct final treatment of the membrane concentration liquid. Combined with the desalination crystallization technology, the salt content in the wastewater is converted into valuable resources (such as sodium sulfate, sodium chloride, potassium chloride, etc.), achieving the reduction and resource utilization of miscellaneous salts and truly achieving zero liquid discharge and solid waste resource utilization.
III. Environmental Protection Advantages of Baohupu
Customized design: Conduct in-depth analysis of water quality, formulate strategies for each factory, and provide the most suitable technical solutions.
Core technology guarantee: Mastering key core technologies such as advanced oxidation, membrane separation and evaporation crystallization to ensure the stable and efficient operation of the system.
Extensive project experience: Has successful cases in multiple chemical sub-sectors such as pesticides, dyes, pharmaceuticals, and fine chemicals.
Life-cycle service: Offers comprehensive services including technical consultation, engineering design, equipment integration, installation and commissioning, as well as operation management.
Facing the strict environmental protection pressure, it is inevitable for chemical enterprises to achieve zero discharge of wastewater. Baohupu Environmental Protection, with advanced technology and rich experience, can provide customers with an economic, reliable and stable overall solution for zero discharge of chemical wastewater, helping chemical enterprises to achieve green transformation and sustainable development.
