The bulk of municipal waste is biodegradable organic matter ( 60-75% ) coming from the kitchen and yard. This kind of waste if allowed or too late will be processed in anaerobic odor due process alter sulfate into sulfide. Chemically, this process is reacting lactate into acetate sulfate, sulfide, water, and CO2. Sulfide ion reacts with H + and Fe2 + to H2S and FeS form of foul-smelling black liquid.

Management of urban waste is to be eradicated, not only require large-scale waste processing technique that capital intensive, but also simultaneously require the application of small-scale waste processing technique which is distributed in large numbers so as to reduce the burden of centralized waste, and become an important means of maintaining cultural practices cultivate waste independently, which will be the basis of ecosystem resilience at large-scale unit to crash.
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Rotary Klin Manual Biophosko® RKM 1000L with the dimension ( Height= 190 cm, width= 155 cm, Weight= 750 kg and length= 290 cm) made of metal and fiber resin and others aeration tools. Rotary Kiln is a perfect solution to overcome communal trash problem at the city that dominated by organic trash such as traditional market trash, restaurant, hotel, and also domestic' s trash that comes from households within one RW ( administrative unit at the next-to-lowest level in city, consisting of several RTs) or even a few RWs or public residence/ estate. Organic trash categories ( degradable) including food remnants, pepper, residu of fish bone, fruit peel, pieces of vegetables, etc) . Convert organic trashes into something usefull- which is compost- that' ll usefull to maintenance the fertile of the soil and as nutrient supllier to the plants around the environments like the public' s resident, hotel, restaurant, public' s environment, etc. Compost can also sells commercially to farmers, garden owners, to everyone who has hobbies in plantation, florish, and gardening.