I. Project Overview
This plan mainly treats industrial wastewater containing complex pollutants, poor biodegradability, high heavy metal and salt content, or high organic matter content with good biodegradability.
Ii. Characteristics of Wastewater
The composition of pollutants is complex.
Poor biodegradability.
Heavy metals and salts are present in high amounts under certain special circumstances.
Some industrial wastewater has a high content of organic matter and good biodegradability.
Iii. Common Treatment Processes
High-salt wastewater: regulating tank + high-density tank + V-shaped filter +UF+NF+RO+ evaporation.
High organic wastewater: regulating tank + coagulation sedimentation tank + two-stage Fenton+ anaerobic reactor +MBR+NF/RO.
Iv. Process Introduction
Adding chemicals to regulate sedimentation: Add chemicals to the wastewater to adjust the pH of the wastewater and precipitate impurities.
Membrane filtration: It uses membrane technologies such as ultrafiltration (UF), nanofiltration (NF), and reverse osmosis (RO) for filtration to remove salts and other impurities from wastewater.
Evaporation: The concentrated water produced by membrane filtration is subjected to evaporation treatment to achieve zero discharge.
High organic wastewater treatment process
Chemical sedimentation: Add coagulants and precipitants to the wastewater to remove organic matter and suspended solids from it.
Advanced oxidation: Advanced oxidation technologies such as Fenton oxidation are adopted to decompose large-molecule organic substances into small-molecule organic substances, thereby enhancing the biodegradability of wastewater.
Biological degradation: By using biological treatment technologies such as anaerobic reactors and MBR, organic matter in wastewater is further removed.
Membrane filtration: Filtration is carried out through membrane technologies such as ultrafiltration (UF), nanofiltration (NF), and reverse osmosis (RO) to ensure that wastewater meets discharge standards or is reused.
V. Main Equipment
Regulating tank: It is used to regulate the quality and quantity of wastewater.
High-density tank: It is used to remove suspended solids and colloidal substances from wastewater.
V-shaped filter: It is used to filter fine particles and suspended solids in wastewater.
UF ultrafiltration equipment: It is used to remove large-molecule organic substances and suspended solids from wastewater.
NF nanofiltration equipment: It is used to remove salts and small-molecule organic substances from wastewater.
RO reverse osmosis equipment: It is used to remove salts and the vast majority of organic matter from wastewater.
Evaporation equipment: It is used for evaporating the concentrated water of high-salt wastewater to achieve zero discharge.
Coagulation sedimentation tank: It is used to remove organic matter and suspended solids from wastewater.
Two-stage Fenton: It is used for advanced oxidation treatment to decompose large-molecule organic substances into small-molecule organic substances.
Anaerobic reactor: It is used for the biological degradation of organic matter in wastewater.
MBR membrane bioreactor: It is used to further remove 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 clean the sediment and impurities in equipment such as sedimentation tanks and filter tanks.
Regularly replace consumables such as ultrafiltration, nanofiltration and reverse osmosis membranes.
Train the operators to familiarize them with the operation procedures and equipment performance.
Vii. Precautions
During the treatment of high-salt wastewater, it is necessary to prevent membrane fouling and scaling, and regular chemical cleaning should be carried out.
During the treatment of high-organic wastewater, it is necessary to pay attention to controlling the reaction conditions of Fenton oxidation to avoid generating excessive sludge.
During the biological treatment process, it is necessary to pay attention to controlling 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 and improve the operation record and monitoring system to facilitate traceability and analysis of the handling effect.
Jinkebotong Environmental Protection Technology (Jiangsu) Co., Ltd
