Effect of activated water treatment plant solid waste sludge on waste water for irrigation

الملخص EN

This study aims to reusing of normal sludge from water treatment plants for waste water treatment for agricultural use.

Normal and acid activated sludge with different acid concentration is used for the treatments.

1, 2, 4 N HCl is the activator.

1- 20 g/lt from sludge are used.

The best effect of water treatment plant sludge(WTPS) in waste water treatment, due to using of acid activated sludge ( 1N HCL, 2N HCl ) in waste water treatment was 3g/lt at room temperature.

It was observed that, activation of sludge affected on their particles properties; size, structure and density that leads to increase of; surface area and adsorption efficiency, pH decreased from 9.6 to 8.3 then raised to 9, BOD as well as COD decreased from78/129 to 30/10 with addition of raw or acidified sludge till 2N HCl while the effect of 4N HCl is 500/100, Ammonia decreased by 14-33% with addition of sludgeand 20% , Heavy metals; Al+3 and Fe+3, reduction is observed in this study.

These uptakes of them is up to 75% to 95 % turbidity (1 NTU) where it was improved till 99% ; Phosphate uptake is 19-60% with addition of raw sludge and acidified with 1N and 2N, HCl; while at 4N, HCl the uptake is 19% , conductivity and TDS increased together with 8% approximately but it was observed, conductivity and TDS decreased.

The influence of mixed salt solutions percolation on the media that elevated exchangeable sodium levels at low concentrations cause dispersion and swelling of the clay minerals and consequently a reduction in hydraulic conductivity of the water solution.

wateranalysed with reference COD, BOD, Turbidity, conductivity, TDS, pH, Ammonia, Phosphate and aluminum, Iron according to international standards.

The result indicates to the best using of normal sludge was 5g/lt, at room temperature and acid activated sludge ( 1N HCL, 2N HCl ) in waste water treatment was 3g/ltat room temperature.

We can recommended that the reuse of raw water clarification sludge was the best compensation to get suitable COD, BOD, Turbidity, conductivity, TDS, pH, Ammonia, Phosphate and heavy metals removal in waste water and preserving the environment.