Abstract
Composting can be use as one of the alternatives solution to managing solid waste. The purposes of this research are (1) Knowing the initial description of the potential milk powder and waste management through surveys (2) Knowing the influence of the concentration of Waste Water Treatment Process (WWTP) sludge as waste decomposers and fortification dose of milk powder. Indicators used are compost quality, yield and growth of leafy vegetables and improvement of soil fertility. This research used 2 factors and 3 replications. Factor A: WWTP sludge concentrations (0%, 10% and 20%) and Factor B: dose fortification of milk wastes powder (0%, 10% , 20% and 30%). Complete factorial designs were used as a tools in this research. The survey shows that the average distributor waste is 2,35% per month. Waste management of milk powder solid waste usually done by burn it with diesel fuel or gasoline. In the industries 68,7% of waste are damaged waste that burn in incinerator. In the quality of compost show that interaction between A and B havehighly significant effect in total of N. The result of fortified compost has met quality standards microbe well as heavy metals. The aplication of fortified compost was increase soil labile C organic. Factor B have significant effect in the width of leaves and yield of vegetable. In the soil fertility show that the interaction between A and B have significant effect in total of Nand K2O .The best combination in this research is A3B4 (20 % WWTP sludge and dosage fortification solid waste 30%dry basis).
Highlights
Industri susu bubuk merupakan industri yang terus berkembang
Factor A: Waste Water Treatment Process (WWTP) sludge concentrations (0%, 10% and 20%) and Factor B: dose fortification of milk wastes powder (0%, 10%, 20% and 30%)
Waste management of milk powder solid waste usually done by burn it with diesel fuel or gasoline
Summary
Industri susu bubuk merupakan industri yang terus berkembang. Asosiasi Industri Pengolah Susu (AIPS) memproyeksikan tahun 2012 industri pengolahan berbahan baku susu sapi bisa tumbuh antara 6,8 % - 7 %. Susu bubuk memiliki kandungan gizi sebagai berikut : protein (min 23%), lemak (1,5 % - 26,0 %), P, K dan unsur lainnya serta aman dari mikroba pathogen yaitu Escherichia coli, Staphylococcus aureus dan Salmonella (SNI 2006). National Organic Standards Board (2002) mendefinisikan kompos sebagai bahan organik berasal dari tanaman atau hewan yang diolahdengan dekomposisi aerobik dan peningkatan suhu untuk memperbaiki sifat fisik, kandungan nutrisi yang bisa memperbaiki tanah serta meminimalkan organisme yang merugikan (pathogen). Menurut Wilkinson et al (2011) pada konsentrasi sludge (kandungan padatan 10-15%) limbah produksi susu sebesar 25 % (berat) dan lama pengomposan 21 hari serta menggunakan reaktor eksperimental diperoleh kompos tanpa efek yang merugikan ditinjau dari bau yang ditimbulkan dan VOC (Volatile Organic Compound) yang dihasilkan. Konsekuensinya, dalam pertanian organik terjadi proses kimiawi dan biologi di tanah agar dihasilkan nutrisi yang bisa dikonsumsi oleh tanaman (Stockdale & Watson 2005)
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