AiKe's after-sales operation and maintenance team went to a middle school in Chongqing to provide original free on-site special maintenance services for the AK-SYFS-PJ series 200 L/day popular laboratory wastewater treatment equipment that has been in use for 1 year. As an urban junior high school mainly engaged in basic physics, chemistry and biology teaching experiments, the school has long faced special treatment difficulties under small water volume: the experimental wastewater is discharged in pulses with a large pH fluctuation range, coupled with the high-humidity and foggy climate of Chongqing, and the school has no full-time operation and maintenance personnel, only part-time management by experimental teachers. The long-term stable operation of small wastewater treatment equipment has always been the focus of campus environmental protection.

As an urban junior high school mainly engaged in basic physics, chemistry and biology teaching experiments, the school has long faced special treatment difficulties under small water volume: the experimental wastewater is discharged in pulses with a large pH fluctuation range, coupled with the high-humidity and foggy climate of Chongqing, and the school has no full-time operation and maintenance personnel, only part-time management by experimental teachers. The long-term stable operation of small wastewater treatment equipment has always been the focus of campus environmental protection.

This maintenance completed the full-process verification and commissioning of the potential operation risks of the newly installed equipment, and simultaneously conducted hands-on training for the school's operation and maintenance personnel. Finally, on-site sampling and testing showed that all effluent met the standards, building a low-cost and easy-to-maintain compliant defense line for middle-school basic teaching scenarios.

📅Service time: 1 year

🏫 User organization: A middle school in Chongqing

📍 Province/City: Chongqing Municipality

🧪 Equipment series: AK-SYFS-PJ

💧 Daily treatment: 200L

I. Small Water Volume, Mainly Basic Experiments — Analysis of Laboratory Wastewater Treatment Difficulties in a Chongqing Middle School

As an urban junior high school, the chemistry and biology laboratories of a Chongqing middle school are mainly based on basic teaching demonstrations and student group experiments. The daily treatment water volume is only 200 liters, which seems to be a light burden, but in fact faces a number of thorny difficulties.

First, the arrangement of middle-school experiment courses is highly concentrated, and wastewater discharge is usually concentrated after a few fixed experiment classes every week, showing a 'short-term pulsed' discharge characteristic. The instantaneous flow far exceeds the daily average treatment volume, which puts high requirements on the equipment's rapid start-up and buffer regulation capabilities.

Second, the experimental content involves neutralization, metal and salt solution reactions, and simple organic matter identification, etc. The wastewater is mixed with dilute acid and alkali liquids, trace heavy-metal ions such as copper and zinc, and a small amount of indicator solution. The pH value often fluctuates greatly between 2 and 11. Conventional simple neutralization devices can hardly achieve precise regulation.

Third, the school is located in a mountainous area of Chongqing. It is foggy and humid in spring and hot and stuffy in summer. If the equipment is installed in a semi-open area, it will face the test of high humidity and temperature difference for a long time. In addition, middle schools generally lack full-time operation and maintenance personnel, usually managed concurrently by laboratory teachers, with insufficient professional technical reserves. When facing equipment alarms or abnormal operation, they often cannot deal with it in time and effectively, which puts practical requirements on the equipment's automatic operation and fault self-diagnosis capabilities.

II. AiKe Provides Free Maintenance for a Chongqing Middle School's Laboratory Wastewater Equipment

Recently, AiKe's after-sales engineer team rushed to a middle school in Chongqing Municipality to provide free on-site maintenance services for the newly installed and commissioned AK-SYFS-PJ series laboratory wastewater treatment equipment, helping the middle school's physics, chemistry and biology experimental wastewater achieve compliant disposal and consolidating the foundation of campus environmental protection construction.

The school conducts chemistry and biology group teaching experiments on a daily basis, generating acid-base waste liquid, trace heavy-metal ions and biological culture residues. The wastewater is discharged concentrated after experiments. The newly installed AK-SYFS-PJ equipment has a daily treatment capacity of 200L, belongs to a small integrated model, occupies a small footprint, adapts to the space conditions of middle-school laboratories, operates fully automatically without dedicated attendance, and fits the actual situation that the school lacks full-time operation and maintenance personnel. The Chongqing region is humid and foggy all year round, which puts high requirements on the moisture-proof and anti-corrosion performance of the equipment.

On-site engineers checked and debugged the whole machine pipes, chemical dosing unit and intelligent electronic control system item by item, verified various operating parameters of the equipment, and investigated potential operation risks of the newly installed equipment, and completed the water-pass commissioning verification. At the same time, they conducted operation training for the school's experimental teachers and explained the key points of daily inspection. After on-site sampling and testing, the outlet indicators met the relevant national wastewater discharge standards. AiKe's professional original maintenance service builds a green environmental protection defense line for middle-school teaching experiments.

III. Introduction to AiKe AK-SYFS-PJ Series Laboratory Wastewater Treatment Equipment

AiKe's popular-type comprehensive wastewater (sewage) treatment system adopts the all-new AiKe sewage system V1 to precisely control the system, improving response time and accuracy while reducing the failure rate; the program reserves an upgrade interface, with a simple, direct, and visual interface.

AK-SYFS-PJ wastewater (sewage) treatment system features PLC fully-automatic control and a manual-interface human-intervention system. When the system fails during operation, manual enabling is performed. The upper part of the manual interface controls chemical treatment, while the lower part controls the operation of each process. Manual mode is used by AiKe engineers during commissioning and fault conditions, forcibly enabling a certain link of the system and adding fault-alarm prompt bars, making system faults clear at a glance and maintenance more direct and simple. It meets the relevant requirements in the national standards 《Integrated Wastewater Discharge Standard》(GB8978-1996), 《Water Pollutant Discharge Standard for Medical Organizations》(GB18466-2016), and 《Water Quality Standard for Sewage Discharged into Urban Sewers》(GB/T 31962-2015).

 IV. Parameters of AiKe AK-SYFS-PJ Series Laboratory Wastewater Treatment Equipment