A Novel Process Using Enhanced Acidification And A UASB Reactor For Biomethanation Of Vegetable Market Waste  

Oleh:

Rajeshwari, K. V. ; Lata, K. ; Pant, D. C. ; Kishore, V. V. N.

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Waste Management & Research vol. 19 no. 4 (Aug. 2001), page 292-300.
Topik: Vegetable market waste; hydrolysis; acidification; sprinkling; leachate; UASB; solid bed; biomethanation; solid waste; waste treatment; biogas
Fulltext: 292.pdf (381.04KB)

Isi artikel

The processing of solid vegetable market waste was attempted in a two-stage digester. Initially, for the hydrolysis and acidification of waste, enhanced extraction process was carried out by continuous sprinkling of water over the bed of waste in a mild steel 100 l solid bed digester. The leachate obtained after completion of acidification phase was further treated in 24.6 l UASB reactor for biogas production. The effect of waste-liquid ratio, dilution and sprinkling rate on the digestion of waste were studied. A high strength leachate, with a COD of 25,298 mg l–1 and total volatile fatty acids concentration of 11.3 g l–1, was obtained as a result of hydrolysis and acidification in a very short retention time of 40 h. The COD reduction of 94% was achieved during UASB reactor operation at organic loading rate of 19.6 kg COD m day–3. A minimum hydraulic retention time of 16 h was achieved.

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