GB/T 40378-2021 English PDF (GBT40378-2021)

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GB/T 40378-2021: Technical specification of treatment equipments for chemistry laboratory waste water
GB/T 40378-2021
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 13.030.40
CCS Z 05
Technical specification of treatment equipment for
chemistry laboratory waste water
ISSUED ON: AUGUST 20, 2021
IMPLEMENTED ON: MARCH 1, 2022
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 4
4 General requirements ... 5
5 Unit requirements ... 5
6 Disposal methods ... 7
7 Environmental protection requirements ... 9
Technical specification of treatment equipment for
chemistry laboratory waste water
1 Scope
This document specifies the general requirements, unit requirements, treatment
and disposal methods, and environmental protection requirements for chemical
laboratory wastewater treatment equipment.
This document applies to on-site treatment devices and processes for
wastewater generated in chemical laboratories.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) is applicable to this standard.
GB 5085.7 Identification standards for hazardous waste -- General rules
GB 8978 Integrated wastewater discharge standard
GB 18599 Standard for pollution control on the non-hazardous industrial
solid waste storage and landfill
JB/T 8938 General specification for sewage treatment equipment
3 Terms and definitions
The following terms and definitions apply to this document.
3.1 Chemical laboratory
A place for exploring, researching, experimenting, and testing analysis of
chemistry.
3.2 Chemistry laboratory waste water
Waste water from the process of container washing, instrument washing, and
cleaning of contaminants.
Note: Excluding waste liquid and hazardous waste.
4 General requirements
4.1 The chemical laboratory waste water treatment device (hereinafter referred
to as the "device") shall be equipped with overflow holes, sampling ports, and
exhaust holes.
4.2 The device shall be equipped with inspection holes or doors to facilitate
inspection and repair.
4.3 The device shall be equipped with an exhaust fan and an exhaust air pipe
connection to the outdoors, and a purification device can be installed if
necessary.
4.4 The device shall be treated effectively against corrosion and leakage.
4.5 The device shall have sufficient rigidity and strength, and shall meet the
requirements of JB/T 8938.
4.6 The device shall be equipped with manual and automatic operation modes
and fault alarm facilities. The device's whole process of treating chemical
laboratory wastewater (hereinafter referred to as "waste water") shall be fully
automatic control.
4.7 Corresponding measures shall be taken during the operation of the device
to ensure that liquids such as waste water and chemical liquids do not freeze.
4.8 The device shall operate safely and reliably under normal maintenance and
specified conditions of use.
4.9 The main equipment of the device shall be a modular design, and the
corresponding processing unit can be selected according to the processing
function requirements.
4.10 The device shall have a collection and storage unit.
4.11 The device shall have a sludge collection and dehydration treatment unit.
4.12 The port of the online monitoring unit shall be reserved in the device.
5 Unit requirements
5.1 Collection and storage unit
remove microbial pollutants.
6.2 Process flow
6.2.1 The waste water is discharged to the waste water collection tank. When
the liquid level in the collection tank reaches the set level, the system
automatically starts to process it.
6.2.2 The waste water is transferred to the pH adjustment tank by the pump.
The acid or lye is automatically added by the automatic dosing device to adjust
the pH value, then to remove acid and alkali pollution. During the dosing
process, aeration stirring or mechanical stirring shall work to stir the liquid well.
6.2.3 The neutralized waste water enters the coagulation-sedimentation tank.
When heavy metal ions need to be processed, the heavy metal trapping agent
is automatically added by the automatic dosing device to remove heavy metal
ions. Add flocculants or coagulants to coagulate-settle the suspended solids
and colloidal substances in the waste water.
6.2.4 After the waste water is coagulated-settled, the organic pollutants in the
non-biodegradable treated waste water are degraded by oxidant oxidation or
advanced oxidation; the organic pollutants in the biodegradable treated waste
water are degraded by biochemical methods. Then, the effluent is passed
through the membrane separation system of the membrane bioreactor (MBR)
or the secondary sedimentation tank for mud-water separation.
6.2.5 After the oxidation and biochemistry treatment, the waste water is filtered
through adsorption to remove residual pollutants. It may continue to treat it by
membrane filtration, to make the effluent meet higher standards.
6.2.6 After disinfection, the waste water can reach the standards and be
discharged.
6.2.7 The sludge generated by the coagulation-sedimentation unit, the
oxidation unit, and the biochemical unit is regularly transferred to the sludge
filtration and dewatering device by the sludge pump. After the filtration and
dehydration treatment, the liquid generated by dehydration treatment is
returned to the waste water collection tank.
6.3 Process flow diagram
The chemical laboratory waste water treatment process is shown in Figure 1.