Sustainable Interior Design in Restaurants by Applying Lumajang Locality Elements

The design case study is a creative, educational and family tourism park located in Lumajang Regency, East Java. The design focus is on the restaurant which is one of the facilities in this area. This place carries the theme of returning to nature by using bamboo material in most of its buildings. The problem is, the interior design of the restaurant area needs to be redesigned to become an attractive family tourist destination and has local characteristics. The redesign of this restaurant aims to rebrand and facilitate visitor activities at this tourist park. To strengthen the theme of returning to nature and educating visitors, the restaurant interior design will apply the Sustainable Design concept. Apart from that, to strengthen the branding of the study object, the application of locality elements from the Lumajang area will also be applied to the restaurant interior design. The local elements that will be applied to the interior design of this restaurant are bamboo and “Pisang Agung” batik. This design data collection stage was carried out using literature studies, field surveys and observations, interviews and questionnaires. The results of this restaurant interior redesign can rebrand and facilitate tourist park visitors and provide education on environmentally friendly interior design, in line with SDGs goals.


Introduction
Sustainable design is an environmentally friendly building with facilities that utilize environmentally friendly processes and adopt efficient use of resources throughout the building's life cycle [1].The role of Interior Designers is very necessary in designing spaces that can reduce negative impacts on the environment, health, comfort for building occupants and improve building performance [2].In this case, we not only pay attention to building users, but also community behavior patterns, relationships with the surrounding environment and community responses to the environment [1].
In Indonesia there are various cultures whose origins are still unknown.The environment and natural potential as well as local community knowledge make local themed building designs have a strong philosophical meaning and provide special characteristics and identity to the work and are capable of sustainability [3].Lumajang is called the "City of Bananas" because it is a surplus agribusiness area, producing abundant bananas.The results of this agribusiness make Lumajang have the "Pisang Agung" batik motif which is one of the cultural products of Lumajang Regency [4].The location of Lumajang Regency, which is at the foot of Mount Semeru, can be found with lots of bamboo plants.Many residents use the bamboo plant for building houses or as raw material for various handicrafts.Apart from that, there are several well-known bamboo forest tourist attractions and education about bamboo.
The design object is a restaurant located in Lumajang regency.The redesign aims to facilitate user activities, namely creative parks, education and family tourism, many of whom come from outside the location.Apart from that, this place also plays a role and promotes Lumajang's business and economic IOP Publishing doi:10.1088/1755-1315/1324/1/012036 2 activities by implementing Lumajang's characteristics and the concept of sustainable design.Apart from that, we also want to grow public perception regarding Lumajang's identity as the location of this restaurant.The problem formulation in this design is How to redesign the interior to rebrand the restaurant by applying the sustainable design concept as the identity of business activities.The problem limitations in this design are using the concept of sustainable design, incorporating traditional Lumajang elements, namely the "Pisang Agung" batik motif, focusing the design on the restaurant area and its surroundings.
The aim of this design is to design a restaurant that maximizes natural elements, rebranding Lumajang local wisdom, sustainable design to contribute to environmental problems and comfort the activities of its users.The benefits of this design are providing a comfortable place for users as well as implementing sustainable design and rebranding local wisdom of Lumajang.Increased knowledge of visitors from outside the business location regarding the natural and cultural potential of Lumajang, as well as an increase in places to eat and drink with different concepts from other places.

Methodology
This research uses primary data collection methods by means of field surveys, observations and interviews.Meanwhile, secondary data is collected by studying literature from a number of books, magazines, journals and articles related to design problems and objectives.Observations were carried out to analyze comparative studies that had criteria in accordance with restaurant 'X', as well as field surveys to determine existing conditions and problems with the design object.The next data collection is an in-depth interview with the owner about the concept, needs and goals to be achieved from this place.Other interviews were also conducted with employees regarding comfort in activities, needs in multi-purpose areas and restaurants that need to be improved to maximize activities.Apart from that, questionnaire data was also collected from visitors regarding the comfort and needs of multi-purpose areas that need to be improved.The results of the data analysis are then used to obtain a general description of the scope of comfort, needs, activities and shared expectations in the restaurant area.

Sustainable Interior Design
In general, the strategies that can be implemented to resolve sustainable issues are as follows [5]: Plan the connection between the building interior and its site.The use of interior space elements is expected to minimize environmental intervention.Climatic conditions, topography, soil, air and plants will be the main focus in the design so that the design gets a response, the main circulation (entrance) which accommodates paths for disabled people and ramps to reach sloping areas. Site Preservation Regional and ecological analysis of land to bring to life the relationship between soil, water and plants.Buildings are dominated by vegetation and protection of natural ecosystems needs to be considered.

 Visual Amenity
Visual Amenity is related to appropriate zoning, orientation and scale.The division of public and private space must be clear.The orientation of the building is related to the local climate and behavior needs to be considered, so that the consequences that will arise are known related to the climate.The direction the building is facing, and the scale conforms to Indonesian visual standards so that it has good comfort standards.Circulation must be able to achieve a sustainable lifestyle and a clear path.

 Economic and Social Well-being
This strategy relies on the potential of society to maintain long-term prosperity.The welfare in question has an environmental, economic and social perspective by meeting current needs without sacrificing meeting the needs of future generations.

 Day lighting and Natural Ventilation
Lighting and ventilation in interior buildings must provide comfort for users in carrying out their activities.Good natural ventilation and lighting will provide sufficient air humidity, so that environmental health is maintained and saves electrical energy.Natural lighting and ventilation can be provided during the day, while at night the lighting is not as dominant due to the lack of natural lighting at night. Reduce, Reuse, Recycle and Re-new able Material Minimize the use of new materials, so that at the end of the building's life it can be reused to form other architectural structures. Embodied Energy and Energy Efficiency Does not use renewable energy such as solar panels and so on, but uses low technology such as sun shading.As little as possible uses energy sources that are rare or require a long time to produce them again (minimize energy scarcity).The solution that can overcome this is that the building design must be able to modify the climate and be made to adapt to the environment, not change the existing environment.

Lumajang Locality
Locality is a characteristic of an environment that has an impact on the atmosphere within it.This element can be seen from real and abstract objects such as culture and the area in which humans live [6][7].Locality imagery can be implemented in interiors as an identity of an environment that is closely related to visual experience [8].This identity can be reflected through dominant colors, materials and shapes.
Lumajang is known as the "City of Bananas" because the area is a surplus agribusiness area and produces abundant bananas."Pisang Agung" is a superior banana variety in Lumajang, so this type of banana has become one of the characteristic symbols of Lumajang.From this, the symbol was developed as a work of art into the "Pisang Agung" batik.The "Pisang Agung" batik design is described as "Nature's majesty" because it is an abundant natural resource in Lumajang Regency."Pisang Agung" is described as a plantation product which is a natural processed product that emerges from nature.It is depicted with a large shape reflecting its name, namely 'Agung', which has the number four, meaning the four cardinal directions (east, south, west and north) in Javanese terms are "sedulur qibla".It means brothers born together from the east, west, south, north, far away, close to us, are still brothers and help each other because humans cannot live alone, they need help from brothers or friends and God's help [9].The philosophy of "Pisang Agung" batik is reflected in the people of Lumajang district who are united and help each other and work together to develop the regional economy through the cultivation of majestic bananas which fulfill the national and international markets, especially in ASEAN countries.
Bamboo found in Lumajang Regency is also quite abundant and cultivated.One of the places for bamboo cultivation is the bamboo forest at the foot of Mount Semeru.The bamboo found there includes yellow bamboo, hedgehog bamboo and others.

Result & Discussion
This design carries the theme "Longing for Nature" which means longing for nature so that visitors feel comfortable and entertained from busy daily lives, and care about the environment which is starting to be eroded by technological developments.The concept used in designing Restaurant X is minimalist rustic.The rustic style uses the concept of environmental awareness which emphasizes materials from nature using the 3R (reduce, reuse, reuse) method such as wood, bamboo or stone.Its application is in reducable materials, reusable furniture, recycled furniture and decorative elements, and others.Meanwhile, minimalism prioritizes simplicity, without complicated decoration, design elements with firm and clean lines.
The application of this design style is in the form of furniture and interior elements (floors, walls, ceilings) and the use of materials such as wood, exposed brick/cement and others.The colors used adopt the colors of natural wealth such as yellow and brown big bananas, green banana leaves and yellow bamboo.The interior concept applies traditional Lumajang elements, namely banana grand batik, as a rebranding of local wisdom to evoke Indonesian-style feelings and atmosphere according to the place of origin of business activities.Through the play of shapes, colors, materials and textures applied to interior elements.The atmosphere that we want to create in this design is a family atmosphere, calm, and elements of traditionality.This is achieved by applying local materials from business locations and sustainable or environmentally friendly materials, as well as the formation of banana great batik into the interior.

Natural Landscaping
This restaurant is located in an open area with lots of grass, shrubs, trees and bamboo.The restaurant building is a semi-open building, so the view of the surrounding garden is unobstructed.Because there is a lot of vegetation in this area, it makes the air in the restaurant area and its surroundings feel fresh.The visitor circulation path is differentiated from the grass area, so that if it rains it is not muddy and the grass can grow well because it is not frequently trampled by visitors.Disabled access such as ramps and special toilets for the disabled (wheelchairs) are also provided to make it easier for them to move around in this restaurant.

 Lighting
The semi-outdoor area uses natural lighting during the day.Meanwhile, at night it uses smart LED artificial lighting, LED Spot Light and LED Strip.The lampshade material in this area uses bamboo material which also comes from the surrounding area.

Material Resource
• Wall The walls use materials that are dominated by local materials originating from the surrounding area, such as various processed bamboo materials such as woven bamboo and bamboo boards.For the walls, bamboo material is combined with exposed brick, exposed concrete and wood (Fig. 4). Furniture There are four types of furniture in the restaurant area : built-in, multifunctional, loose and upcycled furniture.Built-in furniture has been planned from the start of the design based on needs, while multifunctional furniture has many benefits to accommodate space limitations and facilitate the activities of restaurant employees.The restaurant uses loose furniture that is already on the market and used furniture (Reuse/Recycle) for tables and chairs for visitors.This furniture is made from wood, plywood, High Pressure Laminated (HPL), foam or sponge, cloth, bamboo and synthetic rattan.

Refurbished & Upcycle Furniture
Build-in furniture Loose furniture Multifunctional Furniture • Aesthetic elements.
The aesthetic element uses woven bamboo material which is applied as a lampshade and decoration on the ceiling.

Indoor Health and Comfort
Besides functioning as decoration and giving the impression of being one with nature, indoor plants can also function to support indoor air quality.The plants in this restaurant area are grass, Calathea Lutea, Pothos, Sansevieria.There is also a fish pond as one of the dividers of the restaurant area with an open area which also functions to maintain humidity and temperature.

Economic and Social Wellbeing
Interior design elements such as walls, ceilings, aesthetic elements and furniture mostly use bamboo materials originating from the surrounding area.Apart from that, the processing of bamboo into interior elements is also carried out by local residents, such as making woven material that is applied to walls, ceilings and aesthetic elements.Apart from bamboo, the exploration of batik with the "Pisang Agung" motif is also applied in restaurant interior design as an aesthetic element and motif on furniture.This strategy aims to introduce the "Pisang Agung" batik motif to restaurant guests, most of whom are domestic tourists from outside the city.
The "Pisang Agung" batik motif in the shape of a banana leaf was applied to the restaurant walls and entrance area walls which are made from High Moisture Resistant (HMR) material finished with black paint.Apart from that, this motif is also applied to the wall panels and ceiling in the large multipurpose area using wood material.The "Pisang Agung" motif is also applied to the backs of the dining area chairs which are made of wood.

Conclusion
The interior design of Restaurant 'X' is an interior design with a minimalist rustic theme with the application of sustainable design and traditional elements of Lumajang "Pisang Agung" batik.Implementation of sustainable design into interiors with an approach to 6 sustainable design achievements, namely natural landscaping, site preservation, visual amenities, economic and social well-being, day lighting and natural ventilation, reduce, reuse, recycle and renewable materials.The implementation of these achievements through various analyzes includes, among other things, the location of the building which influences sunlight entering the room and the temperature around the location which influences indoor ventilation.Selecting types of natural materials that come from the surrounding area and are processed by local residents is also part of the effort to achieve sustainable design.Indoor air quality and energy saving are also the focus of this restaurant design by maximizing natural lighting and ventilation, vegetation and fish ponds around it.The interior design of Restaurant 'X' using the "Longing for Nature" concept gives a different impression from the daily lives of visitors, most of whom are from the city center, and invites them to care about environmental degradation.The application of locality elements can be seen in the colors chosen, namely yellow, brown, green and brownish yellow which depict the natural richness of the location where this restaurant is located.The materials chosen are in accordance with the concept of sustainable design and empowerment of local materials.Utilizing local materials and promoting local culture aims to preserve the nature, culture and economy of the surrounding community, in line with SDG goals to protect the planet and ensure prosperity for all.
This design can be further developed by deepening the community and environmental conditions around the design object, deepening insight into the chosen concept and its application.This design can also be used as a reference, information, or input for new concepts or a type of sustainable design with local content.

Figure 4 .Figure 5 .
Figure 4. Application of local natural materials on restaurant walls.

Figure 6 .
Figure 6.Type and material of furniture.

Figure 7 .
Figure 7. Bamboo material application for lampshades and ceiling decorations.

Figure 8 .
Figure 8. Application of Lumajang cultural elements in restaurant interior design.