Alternative waste treatment systems by Bhamidimarri, Rao PDF

By Bhamidimarri, Rao

Court cases of the overseas convention held at Massey collage, Palmerston North, New Zealand, 26-27 might 1988

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1–5% acetylene, in order to assess denitrification losses. A more detailed description of the experimental system has been given by Russell and Cooper [1], Some lysimeter trials, similar to those described for anaerobically treated effluent irrigation, were also done. Anaerobically Treated Effluent Irrigation Effluent from an anaerobic lagoon was applied to small scale lysimeters filled with Horotiu sandy loam and established with a ryegrass/clover pasture, and pasture production and composition, the soil characteristics, and leaching water composition were assessed.

1983, 17, pp 415–422. F. , 1987, 14, pp 20–24. O. Box 617, Hamilton New Zealand ABSTRACT Effluents from meat-processing operations contain high concentrations of the plant nutrients N, P and K. These effluents are therefore ideal substrates for land application disposal/treatment schemes. Irrigation can be undertaken with primary-treated or biologically-treated effluent onto land that is either cropped or grazed. Irrigation transfers the environmental effect of effluent discharge from surface waters to the soil, plants and ALTERNATIVE WASTE TREATMENT SYSTEMS 35 groundwater, and the groundwater and any crops grown must be safe for subsequent use.

This is in line with reported studies of colour removals of up to 65% being observed when bleached kraft effluent, with a colour of 1, 000 ppm, was applied to similar sandy loam soil [4]. What happens to the coloured organics is not clear. Whether the lignin is metabolised or adsorbed by the soil particles has not been determined, but there was evidence from other studies that part of the lignin fraction could be removed from the soil by leaching with large quantities of water [5]. At applied BOD loadings up to 60 kg ha−1 week−1, the soil water contained approximately 6 mg/1 BOD less, which was similar to the concentrations obtained from the control plots (rainfall only).

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