Design standards:

The scope of scientific research experiments in research institutions and higher education institutions is becoming increasingly wide. The composition of wastewater discharged from laboratories is relatively more complex compared to other wastewater, and the amount and quality of discharged water have characteristics such as uncertainty, dynamism, and poor reproducibility This untreated laboratory wastewater, after long-term bioaccumulation, may ultimately damage plant growth and endanger the lives of humans and animals. Experimental wastewater is discharged directly into sewage pipes without treatment or with simple treatment, causing great difficulties for subsequent domestic wastewater treatment and reuse of reclaimed water. Therefore, the professional treatment of laboratory wastewater has become an inevitable trend, and it will also require the establishment of professional treatment facilities, just like industrial wastewater and domestic wastewater.

The traditional processes for treating heavy metal wastewater mostly have disadvantages such as poor treatment efficiency, high treatment costs, complex process flow, and large equipment footprint. Membrane technology, as an emerging separation technology, has considerable technical advantages in the field of water treatment due to its high separation efficiency, low energy consumption, no phase change, easy operation, no secondary pollution, easy recovery of separation products, and high degree of automation. The basic principle of membrane separation is to use the selective permeability of the membrane for separation and concentration under a certain driving force. According to the differences in particle size and membrane performance of membrane retention components, common membrane separation processes can be divided into the following categories: microfiltration (MF), ultrafiltration (UF), nanofiltration (UF), reverse osmosis (RO), electrodialysis (ED), etc. Especially, reverse osmosis membrane separation technology, as an advanced technology in water treatment in the world today, has the advantages of cleanliness, efficiency, and pollution-free. It has been widely used in seawater desalination, urban water treatment, pure water and ultrapure water preparation, urban sewage treatment and utilization, industrial wastewater treatment, radioactive wastewater treatment, and other fields.

Solution:
Laboratory wastewater has the characteristics of uncertain total discharge and complex pollutant composition. Different experimental wastewater has different pollutant compositions and treatment methods. There are two methods for determining the pollutants in wastewater: logistics analysis method and actual measurement method.

Logistics analysis method is to roughly determine the composition of experimental wastewater based on the laboratory's experimental content, the properties and dosage of experimental reagents. When the properties of wastewater are unclear, actual measurement methods can be used to determine through experiments. Experimental wastewater often contains the constituent elements of all substances in the experimental process. By understanding the experimental mechanism and process, the main constituent substances in the wastewater can be roughly identified, laying a good foundation for selecting reasonable wastewater treatment methods.

Molecular weight cut-off:

Microfiltration 0.02-10 μ m
Dialysis of 3000 Dalton to tens of thousands of Dalton
Ultrafiltration of 50nm~100nm or 50000-500000 Dalton
Nanofiltration 200-1000 Dalton or 1nm
Reverse osmosis 200 Dalton or below 1nm

Due to the small total amount of laboratory wastewater, unpredictable discharge cycles, and complex composition; This device automatically extracts waste from the wastewater collection tank (collection bucket)Water, after multiple small batch automatic circulation treatments using a reaction device, flocculation and sedimentation device, and membrane treatment device, meets the Comprehensive Wastewater Discharge Standard

(GB8978-1996)After meeting the discharge standards, it enters the biochemical tank or urban industrial sewage pipeline network for subsequent treatment.

Adjust the pH value of laboratory wastewater during the neutralization reaction stage to remove any acidic or alkaline substances that may be present in the water; Chelation reaction removes small amounts of heavy metals and organic sulfur from laboratory wastewater; The flocculation precipitation reaction removes suspended solids from water and filters them during the filtration stage, while the Fenton reaction removes organic matter from wastewater. Based on the characteristics of small laboratory wastewater discharge, uncertain, dynamic, poor reproducibility, and complex composition, as well as the simple equipment, small footprint, low energy consumption, and no phase change of membrane treatment technology, Cnonline laboratory wastewater membrane treatment technology+physical and chemical treatment technology has become a feasible and effective device for dispersed treatment of laboratory wastewater. The odor that may be generated during the treatment process is introduced into the laboratory exhaust gas treatment system.

Process flow description:
1. Laboratory wastewater enters the collection tank through the pipeline network;
2. The wastewater from the regulating tank is pumped into the neutralization reaction tank through a lift pump, and the pH is adjusted to 6-9. Heavy metal ions react with alkali to form hydroxide precipitates.
3. Chelation reaction tank, by adding chelating agents, heavy metals react with chelating agents to form stable chelates, further removing heavy metal ions;
4. Then, by adding PAC and PAM for coagulation and flocculation;
5. The wastewater after coagulation enters the security filter to remove suspended solids;
6. The produced water enters the membrane treatment system;
7. Sludge and solid waste shall be handed over to qualified units for treatment; The odor in the integrated device pool is introduced into the laboratory exhaust gas treatment system through pipelines for discharge.
8. Install one or more sets of Cnonline laboratory wastewater treatment equipment in the laboratory, deeply treat the laboratory wastewater and discharge it to the biochemical tank or urban sewage pipe network after meeting relevant standards.
9. Laboratory hazardous waste liquids, high concentration hazardous wastewater, hazardous solid waste, etc. should be stored and disposed of in accordance with the relevant requirements of the "Pollution Control Standards for Hazardous Waste Storage" (GB18597-2001), and a hazardous waste disposal agreement should be signed with qualified units.

Purpose:

Dealing with hazardous wastewater generated from irregular and irregular intervals in the laboratory, temporarily storing hazardous waste, and effectively reducing excessive laboratory discharge, referring to the standards "Comprehensive Wastewater Discharge Label" GB8978, "Water Pollution Discharge Standard for Medical Institutions" GB18466-2005, "Pollutant Discharge Standard for Urban Wastewater Treatment Plants" GB18918-2002, "Water Pollutant Discharge Standard for Bioengineering Pharmaceutical Industry" GB21907-2008

Product Features:

1. Develop personalized emission reduction treatment plans for hazardous wastewater in laboratories.
2. The equipment has functions such as automatic acid and alkali addition, chemical addition, precipitation, and filtration.
3. The wastewater treated by the equipment can meet the sewage discharge standards or surface water standards.
4. Automatic dosing of online pH meter.
5. Waste liquid collection.
6. Reduce
7. Heavy metal capture
8. Flocculation, sedimentation, filtration
9. Micro electrolysis, water purification process, chlorination disinfection
10. Standard emissions (users must test according to environmental requirements before emissions)

Explanation: For the treatment of large quantities of waste liquids, it is necessary to design separate treatment processes based on the properties and emissions of pollutants; The equipment comes with a program for treating waste liquids containing copper sulfate, chromium, cadmium, lead, arsenic, phenol, and cyanide. For more information, please call 0731-88842508.