Sewage treatment system quality appraisal

Sewage treatment system refers to the general name of facilities and equipment that treats used sewage to meet national, local and industry environmental protection standards and then discharges it into the environment. It is a very important part in the field of environmental protection, which can effectively reduce the discharge of pollutants, protect water resources, and maintain environmental sanitation.
The construction of sewage treatment system is also a necessary condition for promoting the development of urbanization and industrialization, and is of great significance for achieving sustainable development goals.
In sewage treatment system quality appraisal cases, Zhongke Testing can provide sewage treatment system quality appraisal services.

1. Appearance inspection of equipment: Carefully inspect the appearance of sewage purification equipment, including containers, pipes, valves and other components. Make sure there is no obvious damage, corrosion or leakage issues.
2. Equipment process flow inspection: Review the process flow diagram and design parameters of the equipment to understand its sewage treatment process and operating requirements. Ensure equipment complies with design specifications and meets process water volume and contaminant removal requirements.
3. Check key components: Check key components of sewage purification equipment, such as aeration systems, sedimentation tanks, filters, phosphorus removal devices, etc. Make sure they are of the required quality and not damaged, clogged or loose.
4. Performance test: Test the processing efficiency and removal rate of the equipment. This can be done by taking samples and testing the quality of the incoming and outgoing water. Test items may include suspended solids, chemical oxygen demand (COD), ammonia nitrogen, total phosphorus, heavy metals, etc. Ensure that the equipment can achieve the expected treatment results under the set water quality standards.
5. Run the test: Run the sewage purification equipment and observe its working status. Check for unusual noises, vibrations, leaks or leaks. Ensure that the equipment runs smoothly and stably and can work continuously for a long time.
6. Control system test: Check the automatic control system of sewage purification equipment, such as sensors, control valves, automatic adjustment devices, etc. Ensure control systems are reliable and meet specification requirements.
7. Maintenance and maintenance requirements: Understand the maintenance and maintenance requirements of sewage purification equipment, such as cleaning cycles, replacement of filter media, calibration of sensors, etc.

GB/T 34173-2017 Urban drainage and sewage treatment services
GB/T 37071-2018 Rural domestic sewage treatment guidelines
GB/T 10833-2015 Technical conditions for marine domestic sewage treatment equipment
GB/T 28743-2012 Sewage treatment container equipment General technical conditions
GB/T 28742-2012 Safety technical specifications for sewage treatment equipment
GB/T 40201-2021 Technical requirements for evaluation of operation effects of rural domestic sewage treatment facilities
GB 37485-2019 Energy efficiency limit values and energy efficiency levels of submersible push flow mixers for sewage treatment
GB/T 27888.4-2011 Ships and offshore technology Drainage systems for ships and offshore structures Part 4: Sanitary water discharge and sewage treatment pipes

A court in Hunan City entrusted our company to conduct a quality analysis of the "sewage treatment system" involved in the case. The purpose of the quality appraisal analysis of the sewage treatment system is as follows:
To identify whether there are quality problems in the complete set of sewage energy conversion equipment supplied by the defendant XX Energy Co., Ltd. to the plaintiff XX Energy Company, and whether it can complete the five agreed process flows of concentration-conditioning reaction-compression-low-temperature negative pressure drying-granulation to achieve the contract purpose of sludge energy conversion. The
analysis expert group conducted discussions and comprehensive technical analysis on the relevant information, on-site investigation and test data of the "sewage treatment system" involved in the case, and made the following sewage treatment system quality appraisal analysis opinions:
(1) The case involves unreasonable design of the stand-alone sludge energy conversion equipment: for example, there are structural design issues with the cyclone receiver, and the inlet wind speed is too small, which can easily cause dust accumulation and blockage; the nano dust collector’s compressed air backflush pipe is unreasonable, and the backflush air volume is insufficient, resulting in incomplete dust cleaning, leading to blockage of the paste bag. The above-mentioned single-machine equipment blockage quality problems affect the normal operation of the system. The process design of the complete set of sludge energy conversion equipment involved in the
(2) case did not take into account the material characteristics of the sludge with high oil content.