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Photovoltaic semiconductor
Both the photovoltaic and semiconductor industries are manufacturing sectors that are highly water-intensive and have extremely stringent requirements for water quality.
The water-use stage is concentrated in the core production processes, and wastewater treatment poses significant challenges. Therefore, water resource recycling has become a key trend in the industry.
In the photovoltaic industry, water use is primarily concentrated on two high-water-consumption stages: “silicon material processing → wafer fabrication.”
Silicon material processing is the most water-intensive stage in the entire photovoltaic industry chain, and the treatment and recycling of wastewater are crucial.
In the manufacturing of solar cells and the semiconductor industry, ultra-pure water is the core component of water usage. The semiconductor industry has even higher requirements. Both industries represent typical “high-water-quality, high-recirculation” water-use scenarios.
Characteristics of Wastewater in the Photovoltaic Industry
• Uneven water distribution: Over 70% of wastewater discharge is concentrated in silicon material preparation (30%-40%) and wafer fabrication (35%-45%).
The drainage during the component encapsulation stage is minimal and can be disregarded.
• “Diversity + Targeted Approach” for Pollutants: There is no uniform type of pollutant; instead, pollutants must be treated separately according to their specific characteristics at each stage.
No single process can cover all drainage needs.
• Large differences in recyclability rates:
Easy Recycling: Wastewater from silicon wafer cutting—especially from diamond wire cutting—can be treated and recycled at a rate of over 70%.
Difficult-to-circulate: After deep treatment of fluoride- and heavy-metal-containing wastewater from solar cells and acidic wastewater from silicon materials,
Only a portion can be reused as cooling water, and the reuse rate is typically less than 50%.
Characteristics of Wastewater in the Semiconductor Industry
The drainage characteristics of the semiconductor industry are deeply intertwined with its production processes.
It exhibits distinct characteristics including "highly complex pollutants, strong and rigid demands for differentiated treatment, intensive reliance on recycling technologies, and differentiated regional environmental standards."
Specifically reflected in:
• Drainage is primarily concentrated in the original crystal manufacturing stage, where multi-dimensional pollution overlaps and intertwines.
• Wastewater fractionation treatment + resource recovery—highly demand-driven, technology-intensive process pathways;
• The industry’s high demand for reuse is compounded by regional differences in environmental protection efforts.
The key to wastewater treatment
Wastewater treatment in the photovoltaic semiconductor industry shares two common characteristics: "strong demand for differentiated treatment and high requirements for recycling."
Therefore, combining wastewater treatment with recycling is key to effective wastewater management.
Huatai Environmental Protection's Solutions
For ion-containing wastewater with acidic or alkaline properties, rely on Huatai Environmental Protection. HTIPS Core technology,
Solid-liquid separation equipment can stably treat high-concentration solid-containing wastewater without occupying a large workshop area, striking a balance between space utilization and treatment efficiency.
The wastewater contains high-concentration organic substances such as photoresist and developer.
Huatai Environmental Protection Electrocatalytic oxidation 、 Ozone catalytic oxidation technology Precise pre-treatment capabilities: It can efficiently degrade recalcitrant organic pollutants while also preventing secondary pollution.
Make subsequent wastewater treatment easier and more efficient.
More information:
Relevant Cases
Huatai Environmental Protection is committed to becoming a global leader in industrial wastewater treatment, driving toward a “zero-waste future” through technological innovation.
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