Composting toilet system for ecological garden bio wc outline diagram. Labeled educational scheme with technical biodegradable organic waste decomposition using sawdust as filter vector illustration. premium vector by VectorMine

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green vector illustration model nature air concept structure ecology organic bathroom closet eco decay biology chemical gardening ecological dry system outline engineering comfort pipe toilet sanitary lid filter fertility scheme bio educational sawdust diagram sustainable bacteria example explanation lavatory wc compost decomposition ventilation vents excrement composting labeled biodegradable biowaste

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