How to reduce operating costs in the sewage treatment process?

In the process of sewage treatment, reducing operating costs can be achieved by optimizing process operation, strengthening equipment management, and rational utilization of resources. The following are specific measures:

Optimize process operation

Accurate control of aeration: Aeration is a high energy consuming process in wastewater treatment. By installing an online dissolved oxygen monitor, the aeration rate can be adjusted in real-time based on the dissolved oxygen content in the wastewater to avoid excessive aeration. At the same time, frequency conversion technology is adopted to automatically adjust the operating frequency of the aeration equipment according to the actual oxygen demand, reducing energy consumption.

Reasonably adjust sludge concentration: Excessive sludge concentration will increase the cost of sludge treatment and aeration energy consumption, while insufficient concentration will affect the treatment effect. Determine the optimal sludge concentration range suitable for this process through experiments and operational experience, and regularly monitor and adjust it. For example, for the activated sludge process, the sludge concentration is generally controlled at around 2-4 g/L.

Optimize the dosage of chemicals: Accurately calculate the dosage of chemicals based on the quality of wastewater and treatment requirements. Adopting advanced dosing equipment and control technology to achieve precise dosing of drugs. During the coagulation and sedimentation process, the optimal dosage of coagulant should be determined through methods such as beaker testing to avoid wastage of chemicals. Meanwhile, it is possible to explore the use of low-cost but equally effective alternative drugs.

Strengthen equipment management

Regular maintenance: Develop a detailed equipment maintenance plan, regularly inspect, maintain, and repair sewage treatment equipment, replace worn parts in a timely manner, ensure that the equipment is in good operating condition, improve equipment efficiency and service life, and reduce maintenance costs and downtime losses caused by equipment failures.

Equipment selection optimization: When building new facilities or updating equipment, choose high-efficiency and energy-saving equipment. If new high-efficiency aerators, energy-saving water pumps, and fans are selected, although the initial investment may be high, long-term operation can significantly reduce energy consumption. At the same time, according to the processing scale and actual operation situation, the number of equipment should be reasonably configured to avoid idle or excessive equipment configuration.

RESOURCE RECYCLING

Sludge treatment and resource recovery: Proper treatment of sludge can be achieved through anaerobic digestion technology, which converts organic matter in the sludge into biogas for power generation or heating, achieving energy recovery and utilization. In addition, the treated sludge can also be used as fertilizer for landscaping or agricultural production, reducing the cost of sludge disposal.

Reclaimed water: The treated reclaimed water is reused in industrial production, urban greening, road spraying, and other fields to reduce the use of fresh water resources and lower water bills. For example, in some industrial parks, the reclaimed water from sewage treatment plants is reused for enterprise cooling water, landscape water replenishment, etc., to achieve the recycling of water resources.

Strengthen operational management

Personnel training and management: Strengthen the training of sewage treatment plant operators, improve their professional skills and operational level, enable them to proficiently master the operation and maintenance skills of equipment, correctly execute process operation procedures, and reduce cost increases caused by operational errors. At the same time, establish a comprehensive performance evaluation system to motivate employees to actively participate in cost control.

Data analysis and optimization: Establish a sewage treatment operation data monitoring and analysis system to monitor water quality, water quantity, equipment operating parameters and other data in real time. By analyzing the data, timely identify problems that exist during the operation process and take corresponding optimization measures. For example, adjusting process parameters in a timely manner according to changes in water quality can avoid a decrease in treatment efficiency and an increase in costs caused by fluctuations in water quality.