What is Sewage Treatment?

Sewage treatment (wastewater treatment): The process of purifying sewage in order to achieve the quality of water discharged into a water body or reused. Sewage treatment is widely used in various fields such as construction, agriculture, transportation, energy, petrochemicals, environmental protection, urban landscape, medical treatment, catering, etc., and it is increasingly entering the daily life of ordinary people.

Sewage treatment

The topic of water pollution is constantly being raised, especially

Elastic packing

Use

Modern sewage treatment technology can be divided into primary, secondary and tertiary treatment according to the degree of treatment. Generally, the degree of sewage treatment is determined according to the water quality status and the whereabouts of the treated water.

There are many kinds of sewage treatment chemicals, the most commonly used is flocculant, which can be divided into inorganic flocculant and organic flocculant.

Main application areas:

From the perspective of sewage treatment equipment, due to the low technological content of domestic sewage treatment equipment, high-end equipment for sewage treatment is mainly imported, and these imported equipment are mainly produced by large foreign water companies. All are competitive and have higher bargaining power.

Upstream supplier bargaining power

The upstream suppliers of the sewage treatment industry are mainly manufacturers of sewage treatment equipment and suppliers of sewage treatment chemicals. All belong to industries that are developing rapidly and in good demand.

Existing problems and countermeasures

I. Problems

1. Operational services and efficient supervision have become prominent issues. Operation management is becoming increasingly important and prominent. Due to the large number and wide distribution of subordinate enterprises, sewage treatment enterprises have also put forward higher requirements for supervision.

2. In the operation stage of sewage treatment enterprises, the requirements for management level and cost control are constantly increasing.

3. How can sewage treatment enterprises extend the management experience of excellent sewage treatment plants in the industry to all plants and stations, while improving the company's overall management level.

Establish an information-based integrated wastewater treatment management platform

Objectives and tasks of the integrated water management management system: By adopting advanced information technology, a comprehensive information platform for production and operation management is established for the water business group, so that operational management can develop to professional, real-time and intelligent development, eliminating decision makers, The information is disconnected between managers and executives, and the basic framework of "digital water operation management" is set up, which is marked by the digitization of information resources, the information transmission network, and the popularization of information technology applications, to achieve refined and economical production control and process scheduling. Real-time and optimization, systemization and institutionalization of daily management, service standardization and humanization, provide information-based guarantees for its intensified and innovative operation management model.

The integrated water management management system has:

1. Advancement: This system is developed using Spring and Hibernate framework technology, based on J2EE software platform; it adopts B / S architecture, and uses international mainstream enterprise software development technologies JSP / Servlet, Ext, Flex, etc .; in the development efficiency, It has unique advantages in terms of operation stability, data security, and application function expansion.

2. Professionalism: This system combines the excellent operation and management methods of the top ten sewage operation companies in the country. Its management model is composed of a number of senior industry experts in the top ten sewage treatment operation units in the country and the School of Environmental Engineering of Tsinghua University and Computer of Huazhong University of Science and Technology. Designed by several professors and experts of the college, the system was developed over two years using advanced computer technology. It has been trial-run in several large drainage groups and has received unanimous high praise from users.

3. Practicality: This system basically covers all levels in the production and operation activities of the sewage treatment plant, which has comprehensively improved the level of enterprise informatization; the system has a friendly and intuitive display interface, which enables real-time graphical monitoring of production processes and real-time display of various energy consumption ; The system has targeted the energy conservation and consumption reduction issues that the sewage treatment plant is most concerned about, and uses a variety of scientific methods to optimize the control, such as: joint control of pumping units, optimized scheduling, reducing energy consumption, and extending unit life ; Automatic analysis of water quality data, calculation of appropriate medication ratio, saving medication costs; stable control of dissolved oxygen concentration in the aeration tank, reducing energy consumption of the aeration system, etc.

4. Scalability: This system is divided into two parts: the plant data collection system and the operation management platform, which can meet the different application environments of different sewage treatment plants to the greatest extent. The modular design not only meets the basic information of the sewage treatment plant. According to the needs of the platform, the system functions can be customized according to the individual needs of users. At the same time, with the continuous improvement of the enterprise's informationization and management level, the application is expanded to meet higher-level needs.

Advantages of integrated water management system:

1. Centralized optimization management: This system adopts a centralized data collection system to collect real-time production and operation data of the original distributed factories and stations for centralized management and real-time storage, while supporting remote network access; breaking the tradition The narrow vision of the automatic control system and configuration software effectively combines the production control layer and the decision-making management of the enterprise. The real-time system and the management information system are infiltrated and combined with each other to form a multi-level, networked and automated information processing system. Limits have improved the overall level of operations.

2. Online real-time monitoring: This system monitors the real-time operating status and real-time energy consumption status of various equipment according to the production process. The system monitors the real-time graphical and real-time operation status. During the production process, real-time alarms are issued during abnormal processes and emergency plans are issued. Post-alarm processing conditions and results can also be saved as a knowledge base, or you can write an alarm plan yourself to continuously improve the efficiency of fault handling. And with the improvement of experience over time, the ability of the system to automatically deal with various problems is continuously strengthened. It greatly reduces the risk of uncertainty caused by technical personnel in the past to provide such plans in the past. This greatly enhances the stability of production operations.

3. Optimize scheduling, save energy and reduce consumption: Provide expert optimization scheduling solutions for key energy consumption units (pump room, aeration tank, dosing system, etc.) in production and operation. Improve processing efficiency, the system achieves energy saving and consumption reduction.

4. Equipment (spare parts) management: Achieve comprehensive maintenance, maintenance, and inventory management of assets such as equipment and spare parts, and track and record asset changes. Provide a variety of reports. Equipment (instrument) maintenance process, equipment (instrument) maintenance plan, equipment lubrication plan, etc. are fully automated management, and reminded at that time. It has realized the scientific, standardized and information-based management of production equipment, prolonged the service life of equipment and increased the efficiency of equipment use.

5. Statistical analysis function: This system provides a variety of intelligent analysis tools, which can perform statistics, comparison, analysis on various stages, periods, and types of production and operation data, and present it in the form of intuitive charts, such as comprehensive analysis of historical production data. , Comparative analysis of important index parameters. Provide strong support to assist managers' decision-making.

6. Flexible and efficient reporting system: The system can automatically collect, automatically generate statistical analysis reports, preset the process data reporting, and can customize the production report reporting process according to user requirements, and can perform data in any format according to user permissions at any time. Report export, providing first-hand information for management decisions at any time, while greatly alleviating human labor and reducing corporate labor costs.

7. Auxiliary analysis: The built-in energy measurement management module and production planning module can automatically analyze and compare the direct and comprehensive costs of production operations to assist managers in finding a production management plan that can optimize the benefits. According to the algorithm model provided by the user, a variety of intelligent auxiliary analysis tools can be customized and combined with the system at any time.

Problems to be solved for Water Group

1. Establish an enterprise portal to solve the problem of disconnected enterprise information transmission and "information island".

2. Realize the professional, standardized and standardized information management mode of sewage treatment enterprises, and improve their market competitiveness.

3. Establish an enterprise dynamic decision support system to achieve professional and scientific management decisions.

4. Establish an enterprise workflow platform, standardize and standardize work processes, improve management levels, and achieve effective supervision.

5. Improve the enterprise plan database and knowledge base, improve personnel knowledge level and quality, and ensure safe and efficient production.

6. Establish an intelligent wastewater treatment process simulation model to achieve optimal production scheduling, save energy consumption and reduce costs.

Due to the increasingly serious pollution of water resources, the role of sewage treatment is becoming more and more important. So what are the types of work in general wastewater treatment plants? What skills do you need to master in the wastewater treatment field?

1. What kinds of jobs are needed in a sewage treatment plant?

The daily treatment scale of large-scale urban sewage treatment plants generally ranges from tens to millions of tons, and is usually located in remote places. The production, inspection and maintenance, and various service posts in the yard are relatively complete, with their own systems and clear division of labor. The main types of work include laboratory workers, pump management workers, sewage treatment workers, sludge treatment workers, sludge dewatering workers, etc. The auxiliary types of work include electricians, fitters, welders, turners, instrument workers, green chemicals, cooks, doormen, etc.

The daily treatment scale of a small industrial wastewater treatment plant is generally only a few hundred to tens of thousands of tons, which is usually a link in industrial production. The treatment scale is small, the number of employees in the treatment plant is small, and the division of labor is not very clear. Sewage treatment workers are often responsible for many tasks such as pump management, sewage treatment, sludge treatment, and sludge dewatering. Service functions such as inspection and maintenance, and laboratory testing are borne by industrial production enterprises.

2. What are the basic knowledge of sewage treatment workers?

Sewage and sludge treatment are inseparable. Sewage treatment workers have to "Four Understandings and Four Meetings".

"Four Understandings" is: to understand the basic knowledge of sewage treatment, to understand the functions and management methods of various structures in the sewage treatment site, to understand the distribution and use of various pipelines in the sewage treatment site, to understand the meaning of the analysis indicators of the sewage treatment system Its application.

The "four sessions" are: it will reasonably distribute water and mud, it will reasonably dispatch air, it will correctly return and discharge sludge, and it will eliminate common faults in operation.

3. Standards of "should know and know" level for primary sewage treatment workers

Knowledge requirements:

(1) Basic knowledge of sewage flow and its unit conversion, sewage water quality indicators CODcr, BOD5 and SS;

(2) Sewage treatment process flow, names of structures and attachments, uses and mutual relations;

(3) Sewage sources, water quality and water volume change rules, and requirements for effluent water quality;

(4) Safety operation regulations and post responsibility system for sewage treatment;

(6) Basic knowledge of the name, performance, power, flow rate, head, and number of revolutions of electrical machinery for sewage treatment equipment;

(7) the trend, use and interrelationship of the main process pipelines, the opening and closing requirements of various valves and the impact on the process;

(8) Principles of primary sewage treatment and basic knowledge of secondary biological treatment of sewage.

Skill requirements:

(1) Fill in the duty records correctly, timely and clearly;

(2) Collect representative water samples on time and keep them properly;

(3) operation, maintenance and control steps of various process-related equipment and valves;

(4) Can identify whether the primary treatment and secondary biological treatment structures are operating normally;

(5) Secondary biological treatment aeration tank-the basic operation of water distribution, gas distribution, reflux, and sludge removal of the second settling tank system;

(6) Basic operations for slag and mud removal of each structure;

(7) Master the basic operations of key equipment such as sand remover, mud scraper, screw return pump, and mud pump;

(8) Can be observed and tested using general testing equipment. (Paragraph from 100,000 volts of Vito Environment)