Solid waste management (SWM) in various cities around the world is still a serious and complex problem. Currently, SWM causes problems not only in an environmental context but also in social and economic contexts. Therefore, integrated waste management (IWM) is an option that needs to be explored in municipal SWM. In this regard, it is necessary to develop models of an IWM system to integrate the formal system (government) with non-formal systems (informal sector/IS and community-based activity). To integrate all three groups' roles in an integrated system, as theoretically there are 59 factors that influence IWM. However, not all factors are relevant to the implementation in Bandung municipality because every city and country has different situations and priority problems. For the case in Bandung municipality, based on studies, there are only 17 factors that influence IWM, i.e. waste generation, infrastructure, handled waste, reduction of waste, residual handling, final processing site, population/source of waste, mind-set and lifestyle, socialisation, recognition of IS, organisation of IS, clarity for the role of all stakeholders, accessibility of waste, quantity and quality of recyclable waste, price of recyclable material, waste picker income, and incentives or financial loans.

In Indonesia, the organic waste is the largest type of household waste of 60% to 70%. Organic waste is potential to be composted, namely as biofertilizer beneficial to plants. Various methods have been developed to process organic waste into compost, one of which is the method of Brick Overlay. This method is practical and easy to do by the community. Community Services activities (PKM) is done for socializing and training processing organic waste using Brick Overlay method to community of RW 22 Cipageran Puri Indah 2, Tanimulya Village, Ngamprah District of West Bandung regency. Through the socialization activity, it is found that there has been an increase knowledge of RW 22 community about the types of garbage and how to manage waste materials/trash that environmentally friendly. Even 60% of community have practiced the result of the training directly.

AbstrakSampah organik merupakan sampah dominan di  Bank sampah Sahdu, maka perlu pengolahan untuk mengurangi timbulan sampah organik di TPA. Penelitian ini membandingkan 3 jenis komposter aerob di Bank sampah Sahdu yaitu bata terawang, drum dan takakura. Jenis sampah yang digunakan adalah sampah organik campuran (sisa makanan dan sampah halaman). Kapasitas komposter bata terawang, drum dan takakura dapat menampung sampah per harinya dari 456, 210 dan 20 sumber. Kinerja komposter bata terawang, drum dan takakura dalam mengolah sampah organik menjadi kompos adalah 53,45%, 48,27% dan 56,01%. Kualitas kompos yang dihasilkan seluruh komposter memenuhi baku mutu, kecuali parameter pH kompos dari hasil komposter drum tidak memenuhi baku mutu. Kata kunci: sampah organik, bank sampah, komposter aerobik.Abstract Organic waste is the most dominant waste produced, thus the reduction of this type of waste will reduce waste entering the landfill. This research aims were to compare the performance of 3 types of aerobic composters in Waste bank Sahdu which are brick overlay, drum and takakura. The wastes used in this research is mixed organic waste (food waste and yard waste). The capacity of brick overlay, drum and takakura are able to treat waste per day from 456, 210 and 20 households respectively. As related to their performance, the bric overlay, drum and takakura are able to treat 53,45%, 48,27% and 56,01% of organic waste into compost, respectively. The compost quality that produced by all composter has met the standard quality, except pH parameters from the composter drum. Keyword: organic waste, waste bank, aerobic composter.

Recently business competition is getting tougher, especially concerning the fulfillment of consumer needs. Unstable market demand is often a challenge for companies in fulfillment of market demand. The study was conducted at PT TSJ, and the problem is when the supply is higher than the demand, the company will have to bear the holding cost. Meanwhile, when inventory is lower than the demand, the company must bear the cost of a product backlog. This research uses a dynamic system method with three scenarios: real situation scenario, raising the safety stock and reducing lead time. Results of the simulation are based on a real situation that shows the lead time from distributors to retailers and distributor safety stock has a major effect on the costs borne by the distributor and the longer the safety stock; results of the increase of the safety stock scenario shows that the backlog costs are reduced but the product as inventory at the distributor increases and thus the saving costs increases, and the result of reducing the lead time shows that holding cost at distributor reduced. The conclusion of this research shows that the best scenario to minimize the total cost is to reduce lead time.

The challenges facing the city solid waste management (SWM) are increasing and complex because, in a new paradigm, solid waste is not only an environmental issue but also an economic and social issue. Therefore, the involvement of all stakeholders both the government and non-government in SWM is crucial. One of the roles of society as a part of city waste management is through the waste bank. This research is carried out by using a mix methods approach, for mapping and identifying the existing condition of the waste bank, a quantitative method is used and for designing waste bank development, a qualitative approach is used. Data collections were carried out by cluster purposive sampling method and to design the development of WB was done by a focus group interview. The result of this research shows that waste bank contributes to reducing recyclable waste up to 99,3 tons per day or 6,7% of the total generation of waste. To ensure sustainability, the waste bank must be integrated both in municipal waste management and in economic activities that affect the circular economy and the governments must pay attention of finance (incentives), procurement of facilities and infrastructure, as well as human resources training.