I. Project Overview
This plan mainly deals with industrial wastewater that contains complex pollutants, has poor biodegradability, high levels of heavy metals and salts, or high organic content and good biodegradability.
II. Characteristics of Wastewater
The composition of pollutants is complex.
The biodegradability is poor.
Heavy metals and salts have high content in certain special circumstances.
Some industrial wastewater has a high organic content and good biodegradability.
III. Common Treatment Processes
High-salt wastewater: regulating tank + high-speed sedimentation tank + V-shaped filter + UF + NF + RO + evaporation.
High organic wastewater: regulating tank + coagulation sedimentation tank + two-stage Fenton process + anaerobic reactor + MBR + NF/RO.
IV. Process Overview
Process for treating high-salt wastewater:
Adding reagents for sedimentation: Add chemicals to the wastewater to adjust the pH value and remove impurities.
Membrane filtration: Utilizing membrane technologies such as ultrafiltration (UF), nanofiltration (NF), and reverse osmosis (RO) for filtration to remove salt and other impurities from wastewater.
Evaporation: The concentrated water produced by membrane filtration is subjected to evaporation treatment to achieve zero discharge.
Additive precipitation: Add coagulants and precipitants to the wastewater to remove organic substances and suspended solids from it.
Advanced oxidation: By using advanced oxidation technologies such as Fenton oxidation, large-molecule organic substances are decomposed into small-molecule organic substances, thereby enhancing the biodegradability of wastewater.
Biodegradation: Utilizing biological treatment technologies such as anaerobic reactors and MBR to further remove organic substances from the wastewater.
Membrane filtration: Through membrane technologies such as ultrafiltration (UF), nanofiltration (NF), and reverse osmosis (RO), the wastewater is filtered to ensure it meets discharge standards or is reused.
V. Main Equipment
Regulator tank: Used to regulate the quality and quantity of wastewater.
Gao Mi Pool: Used to remove suspended solids and colloidal substances from wastewater.
V-shaped filter: Used for filtering fine particles and suspended substances in wastewater.
UF ultrafiltration equipment: Used to remove large molecular organic substances and suspended solids from wastewater.
NF nanofiltration equipment: Used to remove salt and small molecular organic substances from wastewater.
RO reverse osmosis equipment: used to remove salt and most of the organic substances from wastewater.
Evaporation equipment: Used for evaporating the concentrated water from high-salt wastewater to achieve zero discharge.
Coagulation sedimentation tank: Used to remove organic matter and suspended solids from wastewater.
Two-stage Fenton: Used for advanced oxidation treatment, it decomposes large-molecule organic substances into small-molecule organic substances.
Anaerobic reactor: Used for the biological degradation of organic matter in wastewater.
MBR membrane bioreactor: Used for further removal of organic matter and suspended solids from wastewater.
VI. Operation and Maintenance
Regularly inspect, maintain and service the equipment to ensure its normal operation.
Monitor water quality indicators and adjust process parameters according to the actual situation.
Timely remove the sediment and impurities from the equipment such as sedimentation tanks and filter tanks.
Regularly replace consumable materials such as ultrafiltration, nanofiltration and reverse osmosis membranes.
Train the operators to make them familiar with the operating procedures and the performance of the equipment.
VII. Important Notes
During the treatment of high-salinity wastewater, it is necessary to prevent membrane contamination and scaling, and conduct regular chemical cleaning.
During the treatment of high organic wastewater, it is necessary to carefully control the reaction conditions of Fenton oxidation to avoid generating excessive sludge.
During the biological treatment process, it is necessary to carefully control parameters such as temperature, pH value and dissolved oxygen to ensure the normal growth and metabolism of microorganisms.
During the evaporation process, it is necessary to prevent scaling and corrosion, and regular cleaning and maintenance should be carried out.
Establish a sound system for recording operations and monitoring, which will facilitate the tracing and analysis of treatment effects.
Jinkebotong Environmental Protection Technology (Jiangsu) Co., Ltd
