GB 18466-2005 Discharge Standard for Water Pollutants in Medical Institutions
Gbj 15- 188 Code for Design of Water Supply and Drainage in Buildings;
Implementation manual of water supply and drainage standards and specifications;
Code for Design of Outdoor Radiation (GBJ14-87);
Environmental noise standard (GB 5096-93);
Code for Design of Low Voltage Distribution (GB 50054-95；; );
Water quality of irrigation water for urban sewage reuse (GB 20922-2007);
Practical experience and engineering parameters of similar projects completed by our company;
Comprehensive wastewater discharge standard (GB8978- 1996).
design principle
1) Strictly implement the current national technical standards and norms for environmental protection and abide by national and local laws and regulations on environmental protection;
2) Advanced, reasonable and reliable treatment technology is selected, which is simple in operation, convenient in management, less in land occupation, less in investment and low in operation cost on the premise of ensuring the treatment discharge reaches the standard;
3) This project is an environmental protection project, so special attention should be paid to environmental protection to avoid and reduce secondary pollution. It is required to improve labor hygiene conditions and implement the policy of safe production and clean and civilized production;
4) In order to improve the management level of sewage treatment station, the design adopts a high degree of automation and low labor intensity of operators;
5) Reasonable selection of high-quality accessories, reducing energy consumption, improving work efficiency and service life, and reducing costs;
6) In the process design, it has greater flexibility and adjustability to adapt to the periodic changes of water quantity and water quality. Adopt a set of sewage treatment facilities to improve the flexibility and variability of the system;
7) Adopt sludge pre-reflux nitrification process to reduce sludge output;
8) Adjust measures to local conditions, make rational layout and make effective use of space.
3. Design scope
The process, structure, equipment, electrical and automatic control of the medical sewage treatment equipment system from the outlet of the regulating tank to the discharge port. Civil works, pipelines outside the treatment station, decoration works, heating, ventilation and fire fighting construction are not included. Our factory provides drawings and data of civil foundation design scheme.
The design of sewage treatment station is mainly divided into two parts: sewage treatment and sludge treatment and disposal.
A) sewage treatment
Investigate and study the changes of sewage quality and quantity, and choose a scheme with mature technology, reasonable economy, flexible operation, convenient management and stable treatment effect.
B) sludge treatment and disposal
Usually, there are two methods for sludge treatment in small sewage treatment stations: one is mechanical dehydration of sludge concentration; The second is sludge drying treatment. Considering the owner's large investment in dewatering treatment of sludge concentration machinery, sludge concentration and drying treatment has an impact on the surrounding health. Due to the sludge digestion system in this process, the amount of sludge produced is very small. Therefore, the sludge produced in this project will enter the sludge concentration tank for simple concentration, and then it will be pumped out by the dung truck.
Chapter III Sources, Nature, Quantity, Discharge Standards and Design Scale of Sewage
1, sewage source
The sewage of this sewage treatment system mainly comes from medical wastewater and domestic wastewater. After being treated by the sewage treatment system, the wastewater is discharged into the urban pipe network.
2. The nature of sewage
Comprehensive medical and domestic sewage in typical hospitals.
3. Sewage volume
According to the information provided by the hospital, the maximum sewage discharge is greater than or equal to 30T/D, and the designed treatment capacity is1.5m3/h. ..