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Small batch composters are digging deep to find big waste solutions

At Bishop O’Dowd High School in the Oakland hills, gardener Ned Lange is making small-batch vermicompost from the school’s food scraps. He takes scraps like leafy greens, peels, and stems that won’t make it into the cooked lunch, and blends them into a smoothie that he feeds into an 8-by-4-foot corrugated steel bin that is home to 100 pounds of worms. He lifts the roof off and carefully peels back pages of damp newspaper that are beginning to disintegrate. Underneath,…