Potential of Thai Soil on the Anaerobic Treatment of Urban Wastewater in the Alternate Flooding and Drying of the Soil with Plant System

Abstract

To evaluate potential treatment of organic waste (OW) dominant pollutions in the urban wastewater by Thai soils, a primary and a main anaerobic incubation experiments have been carried out. First probation, excess glucose solution (1500 mg/l) without (0) and with (+3750 mg/l of 16-20-0 fertilizer) in a 5 x 2 factorial in CRD, having 5 flooding periods: 0, 1, 3, 5 and 7 days and 2 fertilization: 0 and + replicatied 3 times, in a Tropaquepts (Rb series) at 1:2 of soil:solution ratio, has been carried out. This trial confirmed, LERD’s discovery that anaerobic treatment of the OW was very effective reaching the treatment potential at the 5 days period at 2730 ppm from the 3000 ppm load used. Next demonstation, the soil and other 16 ones in 7 of the 9 Thai soil Orders which were Alfisols (4), Inceptisols (3), Mollisols (3), Ultisols (3), Vertisols (2), Spodosols (1), and Oxisols (1) were investigated. Anaerobic incubation at 1:2 soil:solution ratio of the fertilized glucose solution at 5 days period in the CRD experiment of the 17 soils with 3 replications that was highly significant difference (P<0.01). Soil properties had correlated with glucose treatment by Pearson correlation, were related in linear equation which can forecasted potential of wastewater treatment because of many soil properties were encourage anaerobe activities which are nutrients, enzymes and electron accepters.