Chemical manufacturing generates some of the most complex and hazardous industrial wastewater streams. The diversity of chemical processes — from petrochemical synthesis and agrochemical production to specialty chemicals and plastics — means each facility produces a unique cocktail of pollutants including toxic organics, heavy metals, acids, alkalis, and refractory compounds that resist conventional treatment methods.
Chemical wastewater often contains substances that are inhibitory or toxic to biological treatment organisms, requiring careful pre-treatment strategies. Concentration fluctuations can be extreme, with batch processes creating slug loads that can overwhelm treatment systems. Many chemical compounds are persistent organic pollutants (POPs) that require advanced oxidation to break down.
Zhongsheng Environmental designs robust treatment systems for the chemical industry, combining physical-chemical pre-treatment, specialized biological processes, and advanced polishing technologies to handle even the most challenging effluent streams while ensuring full regulatory compliance.
Toxic & Inhibitory Compounds: Many chemical intermediates and byproducts are toxic to biological treatment organisms, requiring detoxification through chemical oxidation, reduction, or precipitation before biological treatment.
Extreme pH Variations: Acid and alkali streams from different processes create extreme pH swings (pH 1–14) that must be carefully neutralized before downstream treatment.
Refractory Organics: Many synthetic chemicals and their intermediates are resistant to biodegradation (low BOD/COD ratio), requiring advanced oxidation processes (AOP) to break molecular bonds.
Heavy Metal Pollution: Catalyst residues, metal salts, and plating chemicals introduce heavy metals (Cr, Ni, Cu, Zn) that must be removed to ppb levels through precipitation, ion exchange, or membrane separation.
Comprehensive treatment approach for chemical industry wastewater
Separate collection of concentrated toxic streams, acid/alkali streams, and general process water. Equalization tanks buffer batch process fluctuations for stable downstream treatment.
Neutralization, heavy metal precipitation (hydroxide/sulfide), chemical oxidation (Fenton, ozone, or peroxide) for detoxification of toxic organics and cyanide destruction.
IC (Internal Circulation) or UASB anaerobic reactor for high-COD streams, followed by aerobic treatment (MBR or SBR) for final COD polishing and nitrogen removal.
Activated carbon adsorption, membrane filtration (UF/NF/RO), and evaporation-crystallization for facilities targeting ZLD or stringent discharge limits.
Robust wastewater treatment equipment for chemical plants
Integrated MBR membrane bioreactor system combining activated sludge treatment with submerged PVDF membrane filtration. Delivers near-reuse-quality effluent (<1 μm filtration) with 60% smaller footprint than conventional systems. Ideal for municipal sewage, industrial process water, and water reuse projects from 10 to 2,000 m³/day.
Zhongsheng Environmental industrial RO systems deliver ultra-pure permeate at recovery rates up to 95%, serving pharmaceutical, semiconductor, food & beverage, and power generation applications worldwide. Fully automated PLC-controlled operation with continuous output and minimal chemical consumption.
Zhongsheng Environmental multi-media filters remove suspended solids, turbidity, and colloidal matter from raw water, achieving SDI values suitable for downstream RO membrane protection. Robust, low-maintenance vessels with long-life filter media and automated backwash.
Zhongsheng Environmental automatic chemical dosing systems provide precise, PLC-controlled injection of coagulants, flocculants, pH adjusters, and specialty chemicals for water and wastewater treatment. Skid-mounted, pre-wired, and factory-tested for rapid installation.
Zhongsheng Environmental plate and frame filter presses deliver efficient solid-liquid separation for municipal and industrial sludge dewatering, with filtration areas from 1 m² to 500 m² and manual, hydraulic, or fully automatic PLC-controlled operation.
Zhongsheng Environmental high-efficiency sedimentation tanks (lamella clarifiers) combine sludge recirculation, flocculation, and inclined-plate separation in a single compact structure — achieving surface loading rates of 20–40 m/h while reducing chemical consumption by up to 30%.
Zhongsheng's Flue Gas Desulfurization (FGD) Scrubber combines SO₂ removal and particulate collection in a single integrated tower. Using lime/limestone wet scrubbing, it achieves high desulfurization efficiency while producing reusable gypsum byproduct — with no moving parts, low operating cost, and compliance with EPA NSPS, EU Industrial Emissions Directive 2010/75/EU, and World Bank emission guidelines.
The ZSDM Series Pulse Jet Baghouse is a high-efficiency fabric filter dust collector engineered for coal-fired boilers and industrial furnaces. Featuring low-pressure long-bag pulse cleaning, an integrated bypass system, and modular construction, it achieves particulate emission levels below 10 mg/Nm³ — meeting EPA NSPS, EU Industrial Emissions Directive 2010/75/EU, and BAT-AEL requirements.
Our engineers have extensive experience with complex chemical wastewater. Send us your effluent analysis and we will design the optimal treatment system.
