Guangxi green building design code is a guiding document for green buildings in Guangxi, which represents the highest level of green buildings in Guangxi province and plays a role in standardizing and guiding the design of green buildings in Guangxi. Among them, what are the provisions of Guangxi Green Building Design Code for the utilization of non-traditional water sources? The following is an introduction to the provisions of Guangxi green building design code for non-traditional water resources utilization brought by the construction network for reference.

non-traditional water sources, such as rainwater and reclaimed water, should be used for domestic water that is not in contact with people, such as landscape water, greening water, car washing water, road surface and ground washing water and toilet washing water. Rainwater can also be used for replenishing water for circulating cooling system and fire fighting water. Landscape water should give priority to rainwater and reclaimed water, and municipal water supply and self-provided underground well water supply should not be used as landscape water.

When using non-traditional water sources such as rainwater and reclaimed water, the following requirements should be met:

1) When rainwater and reclaimed water are reused, the water quality should conform to the national standards GB/T18921 for Landscape Water Quality of Urban Sewage Recycling and GB/T 18921 for Urban Miscellaneous Water Quality of Urban Sewage Recycling;

2) The engineering design using non-traditional water sources should meet the requirements of relevant provisions in Code for Design of Wastewater Recycling Engineering (GB 51335), Code for Design of Reclaimed Water in Buildings (GB 51336) and Technical Code for Rainwater Utilization in Buildings and Residential Areas (GB 51411);

3) Non-traditional water sources should have sufficient disinfection and sterilization capacity in the process of treatment, storage, transmission and distribution, and safety protection and monitoring (inspection) control measures should be taken;

4) When reclaimed water is used as greening water, it is not appropriate to use sprinkler irrigation method to atomize water;

5) If seawater is used to flush toilets, the anticorrosion of pipes and equipment, as well as the disposal and discharge after use should be considered.

The following safety measures must be taken for the water supply system using non-traditional water sources:

1) The reclaimed water pipeline should be provided with identification belts, and the reclaimed water pipeline should be identified according to GB 51336, Code for Design of Reclaimed Water in Buildings.

2) effective measures should be taken to prevent wrong connection, misuse and drinking, such as pools (boxes), valves, water meters and water intakes.

when non-traditional water sources are used for landscape water in residential areas, the waterscape design, water quality and water quantity guarantee should be comprehensively considered, and the following measures should be taken:

1) When site conditions permit, wetland technology should be adopted for landscape water pretreatment and landscape water recycling purification.

2) Mechanical facilities are adopted in the landscape water to strengthen the hydraulic circulation of the water body, enhance the disturbance of the water surface and destroy the growth environment of algae.

3) adopt biological measures, such as cultivating aquatic animals and plants to absorb nutrients in water and controlling algae, and eliminate the potential factors of eutrophication and water corruption in time.

Through technical and economic comparison, the scheme of rainwater storage, treatment and utilization should be reasonably determined to meet the following requirements:

1) The rainwater collection and utilization system should be equipped with an initial rainwater discarding device and a rainwater regulating pond, and the collection and utilization system can be combined with the design of landscape water bodies.

2) The treated rainwater quality should meet the water quality standards for corresponding purposes, and should be used for greening, landscape, air conditioning and cooling.

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