Chapter 4 Water service system design of songhe park
4.7 New system upgrades
The new system has brought improvements in logistics, services, ecology, economy and culture.
4.7.1 Changes in logistics
Under the new system, the water consumption of the tap water in songhe park has been significantly changed and reduced. Based on the original scale, the water consumption of tap water decreased from 2947.56 m3/year in 2016 to 532.76 m3/ year, which reduced by 553%; The use of tap water in public toilets decreased from 1179.02 m3/ year to 235.8 m3/ year. The water consumption of teahouse decreased from 326.79 m3/ year to 80 m3/ year. Provision of free drinking water has been reduced from 218.79 m3/ year to 216.96 m3/ year. However, plant irrigation, viewing pool and fountain are no longer dependent on tap water, and a total of 1222.96 m3/ year of tap water is saved among the three.
Songhe park's displacement is 3867.86 m3/year (2016; Excluding surface rainwater and irrigation drainage); High quality clean drainage (including handwashing, cleaning, disinfection of tea utensils, etc.), tea remains and viewing pool water are collected to the middle water pipeline, a total of 2865.68m3/ year. The shower, lavatory, cleaning, laundry drainage and air-conditioning condensation water of the buildings in tieling road 50, 90 and 110 are collected to the middle water pipeline, a total of 193631m3/ year. The aquaculture displacement collected by the seafood market is 1,350 m3/ year. The new system has collected about 197846.68 m3/ year of high-quality drainage from the park interior, surrounding communities and seafood market, of which 7803.7 m3/ year is used for the artificial wetland water source in the new system, and the rest drainage will be further utilized in the long-term goal.
The artificial wetland system, with a water volume of 7803.7m3/ year, provides water for the cleaning of the viewing pool, fountain, teahouse and toilet of songhe park, as well as for the irrigation of plants. It also supplies clean water for the yangshupu port and the aquaculture for the seafood market. The design of the artificial wetland system in songhe park will be detailed in chapter 5.
The constructed wetland system also reduced the amount of silt in songhe park, from 148.5 m3/ year to 17.56m3/ year.
The new system collected 65.9kg/ year of tea leaves. Tea leaves and silt are combined to make fertilizer for plants to grow.
4.7.2 Improvement of water quality
Artificial wetland system brought the ascension of water quality, water from the surface water environment quality standard "(GB3838-2002) of bad V kind into Ⅲ class. At the same time, the water environment of the viewing pool and the fountain has been substantially improved, and the water pollution has been effectively controlled, making the water environment of the park get a better experience.
4.7.3 Waste turned resources
All of the current drain is fed into the sewer line. The new system carries out sewage and wastewater diversion, collects high-quality drainage, and is purified through the artificial wetland system, so that it can be reused in various water services in the park.
Tea leaves are made into organic fertilizer. The tea residue was decomposed by mixed fermentation bacteria under the action of microorganism. The soil was mixed with 1:5 quantity to make organic fertilizer68. Tea residue mixed with soil yields better organic fertilizer. Through the treatment of the constructed wetland system, the tea residue mixed silt can produce the high-quality organic fertilizer of 0.39 m3/ year.
The method of constructed wetland silt treatment will be detailed in chapter 5.
4.7.4 Improvement of water services
The new system brings comprehensive improvements to the park's water service, both in terms of quantity and quality of water and in terms of system operation.
In terms of park water demand, the new system can not only meet the current park water demand, but also increase the supply of various types of water, such as free drinking water and tea supply, while economic benefits are improved. There are also new water projects, such as cooling spray in the summer. The new system also serves the perimeter of the park. Seafood markets get recycled water use services. In the long term, the new system will also serve the residents of the surrounding communities and provide them with access to central water.
The new system not only provides sufficient demand for water, but also provides
68 Tea residue composting method. China Tea Network [EB/OL]. http://www.zgchawang.com/knowledge/show-82565.html, 2014-12-31 /2018-04-18.
water quality services. Ⅲ artificial wetland system can purify the surface water quality, and can satisfy the park in addition to drinking and nearly all water projects outside of direct contact with the skin. The improvement of water quality reduces the pollution of water environment and provides the service of beautifying the environment. In parks, improved water quality brings better experiences and promotes interaction between people and water. At the same time, the improvement of water quality also serves the park, and the water quality of yangshupu port has been improved. The park exports renewable water to yangshupu port all year round, which can reduce water pollution in yangshupu port, reduce water treatment cost in yangshupu port and improve social benefits.
As a result of the improvement of water quality, the former semi-closed state of the teahouse to re-inject vitality. Under the new system, the teahouse will be open for visitors to view the water. Water services create opportunities for communication while promoting the utilization of teahouse space.
The new system reduces water maintenance processes. Under the action of artificial wetland system, the water in the park is less polluted and the maintenance cost is low. The artificial wetland system does not need to be maintained all the year round.
It only needs to harvest the aquatic plants of the wetland in summer and autumn. And the regular monthly cleaning of the initial sink into the mud. Compared with the current system, the artificial wetland system of the new system saves a lot of manpower and cost by eliminating the need to regularly replace and clean up the water in the park pools.
4.7.5 Promotion of community communication and cooperation
The new system, which brings parks and communities together in a interdependent way, promotes win-win cooperation. The two share resources, information, behavior, culture and other community elements with each other to facilitate communication.
These exchanges help to create a dynamic, non-linear network of communication in motion, form a model of self-creation system, reduce problems in the current system, and promote the benign and stable development of parks and communities.
Community cooperation also promotes neighborhood harmony. Residents are willing to participate in communication and sharing, and their behaviors change from passivity to initiative, which reduces the waste of resources and pollution in water
service, improves the efficiency of system operation, and also creates a stable and healthy community atmosphere.
4.7.6 Change of ideas
The establishment of the new system changed the participants' previous development concepts. The participants established the idea of deep ecology. The manager changes from the previous water service mode which relies on high consumption and pollution to the sustainable water service mode. From the mode of operation that relies on government subsidies to the mode of operation that moves towards ecological intelligence. With the change of concept, individual visitors start from saving water and protecting the environment, which drives the healthy operation of the whole system.