Project Policy Background

Chapter VII: The Outline of the 14th Five-Year Plan"Commit to prioritizing the development of agriculture, rural areas, and rural revitalization," emphasizing the need to launch an action for improving rural living environment, focusing on town centers and key villages for tiered advancement in rural wastewater treatment.

The notice issued by the National Development and Reform Commission on the "Special Management Measures for Central Budgetary Investment in Pollution Control and Energy Conservation and Carbon Reduction" proposes to prioritize support for environmental infrastructure projects such as wastewater treatment and the utilization of wastewater resources in various regions.

Project Background

Current rural water pollutant emissions account for a significant portion of the national total.Over 50% of the wastewater is generated, yet the treatment rate is only 10%-20%, with a large volume of untreated wastewater discharged directly, severely impacting the local water ecological environment.

In recent years, guided by policies and supported by substantial funding, numerous rural wastewater treatment stations have been constructed across various provinces and cities.(As shown in Figure 1 and Figure 2), this centralized treatment of rural wastewater has somewhat alleviated the pressure on rural wastewater management and achieved notable results. However, it has also exposed many issues, with the most prominent being "wastewater not meeting treatment standards and non-compliant wastewater being discharged directly again." The root cause is the lack of wastewater quality monitoring in the rural wastewater treatment process. The main reasons for this gap or inadequacy are limited local government budgets and the high cost of traditional chemical analysis monitoring equipment compared to rural wastewater treatment stations. Additionally, rural wastewater is characterized by its widespread sources, dispersion, large variation in water volume, and significant regional differences, leading to a large number of treatment stations with suboptimal performance and no real construction significance.

Under policy guidance and real-world pressures, rural supervisory units urgently require a wastewater monitoring system that can achieve water quality monitoring while being relatively cost-effective for rural conditions.

Hebei Derun Hou Tian Instrument Manufacturing Co., Ltd. has been committed to the research and manufacturing of environmental protection monitoring equipment. The head of our R&D team has repeatedly conducted on-site inspections at rural domestic wastewater treatment stations, combining the actual on-site conditions. After a large number of experiments and field tests, we have developed an online monitoring system for rural domestic wastewater. 

System Composition

Rural domestic wastewater online monitoring system consists of: water quality analysis unit, water sample collection unit, data collection/Transmission Unit, Video Surveillance Unit (optional), and Central Platform (optional) constitute.

Water Quality Analysis Unit: Responsible for monitoring the water quality after the domestic wastewater station treatment, featuring real-time data output, no secondary reagent contamination, and many other advantages.;

Water Sampling Unit: Responsible for collecting water samples exceeding the set values during monitoring, securing evidence, etc.;

Data Collection/Transmission Unit: Responsible for collecting the analysis data from the water quality analysis unit and uploading it to the central platform.

Video Monitoring Unit: Responsible for real-time feedback of the actual situation at the domestic wastewater treatment station, facilitating management.;

Central Platform: Displays monitoring data and on-site video footage centrally, allowing managers to clearly view the monitoring data and videos of each sewage treatment plant.

System topology diagram

System Advantages

Low capital investment: Common pollution factors that need to be monitored in rural domestic wastewater include:COD, ammonia-nitrogen, pH, total phosphorus, BOD, etc. For example, monitoring the investment in COD factors (refer to the table below).

Low maintenance workload:The "Technical Specification for the Operation of Online Monitoring Systems for Water Pollutants (CODcr, NH3-N, etc.)" (HJ 355-2019), issued by the Ministry of Ecology and Environment in December 2019, requires "at least one on-site maintenance of the online monitoring system for water pollutants every 7 days," which includes replacing reagents, calibrating equipment, and collecting waste liquids.

The water quality analysis and monitoring equipment in the rural wastewater monitoring system developed by Derun Houtian has an average maintenance cycle of3 months, maintenance does not include changing reagents, collecting waste liquids, etc.

Small land area required:The "Technical Specification for Installation of Online Monitoring Systems for Water Pollution Sources (CODcr, NH3-N, etc.)" (HJ 353-2019), issued by the Ministry of Ecology and Environment in December 2019, stipulates that the area of the station room housing online analyzers such as CODcr shall not be less than 15㎡.

DeRun HouTian's developed rural wastewater monitoring system on-site terminalSure.The total land area covers approximately2㎡ - Maximizes space savings, especially suitable for installation at rural wastewater treatment stations.

Accurate Data Analysis: The water quality analysis unit within the system demonstrates good consistency in the accuracy of monitoring data, utilizing analytical methods similar to the traditional chemical reagent analysis model.

Significance of Construction

Real-time Water Quality Monitoring: Once the system is established, it can monitor the water quality after treatment at rural domestic wastewater treatment stations in real-time, truly achieving the construction purpose of the wastewater treatment stations.

Reduce labor costs: The system includes a remote data monitoring platform, allowing supervisors to access the operation status and wastewater treatment effects of the wastewater treatment station without leaving their homes, thereby alleviating personnel stress and reducing labor costs to some extent.

Water Quality Analysis Unit

Unit Composition: Multi-wavelength Water Quality Detector, Ammonia Nitrogen Sensor,pH sensor, conductivity sensor, dissolved oxygen sensor, turbidity sensor, and field data display meter head.

Technical Specifications: The multi-wavelength water quality detector boasts fast analysis speed, no reagent consumption, no secondary pollution, easy installation, and low investment, among other advantages.;Dual measurement mode with continuous and single measurements; features over-limit alarms and automatic calibration.

Water Sampling Unit

Unit Composition:DR-803M Water Quality Automatic Sampler, Sampling Pipeline, Sampling Pump.

　　DR-803M Automatic Water Quality Sampler

This water quality automatic sampler utilizes embedded control technology and is a fully functional intelligent sampler. It offers features such as timed sampling, proportional sampling based on time, simultaneous sampling, external control sampling, over-limit sampling, and immediate sampling. The sampler features password protection, power failure protection, and has the advantages of compact size, automatic refrigeration, and easy installation, making it an essential component of rural wastewater treatment stations.

Data CollectionTransmission Unit

Unit Composition:DR-295A Data Acquisition and Transmission Device, Mobile, Unicom, or Telecom data flow cards, or wired network.

　　DR-295A Data Collection and Transmission Device

Video Surveillance Unit

Unit Composition: On-site End2 cameras, 1 hard disk recorder, and 1 network switch make up the system.

Camera

　　4 million pixels

Supported H.265/H.264/MJPEG video compression standards

Interface Protocol onVIF(PROFILE S,PROFILE G),ISAPI,SDK;

Mobile detection and occlusion alarm supported.IP address conflict, unauthorized login, storage full;

Supports boundary detection, area intrusion detection;

Interlock Methods: Image capture, alarm output, video recording, etc.

Hard Disk Video Recorder

Video Input:8 channels

Video Output:2 HDMI ports, 2 VGA ports;

Alarm Output:4 lanes

Alarm Input:16 channels

Interface:1 standard RS-485 port, 1 RS-232 port, 2 USB 2.0 ports, 1 USB 3.0 port.

Ingress Protection (IP) Rating:IP40。

Network Switch

　　POE Power Supply

　　6KV lightning protection

Transmission Distance≤ 250 meters

Storage Temperature-40℃~85℃;

Support Agreement IEEE 802.3af、IEEE 802.3at。

Central Platform

The system's central platform displays data and videos centrally, allowing administrators to clearly and visually view data and videos from various monitoring locations.

Historical Data Inquiry: The software allows management personnel to real-time inquire historical data for various parameters.;

Fault Inquiry Function, managers can view historical power failure and alarm records;

Historical Curve, Software supports viewing the historical curve chart of measurement parameters.;

Data Reports: Customizable data reports can be generated based on user parameters, and can be exported locally.(Excel Format) Process further data handling;

Historical Records: The platform software allows for viewing historical data information and data curve analysis for all measurement parameters at different time intervals.Export in Excel or PDF format.

Site Addition and Deletion: Site information can be added or deleted through the platform software.;

Dynamic Account Management: Add or delete users, modify user access permissions, change login passwords, etc., through the administrator account login.;

Platform software category3-tier access management (Level 1 can only view data and alarm information; Level 2 can add or delete sites, configure parameters; Level 3 is the administrator, with all functions of Levels 1 and 2, plus the ability to perform backend management operations like software upgrades).

Key Function Showcase