Technology for preparation of contaminated water from poultry farms for irrigation

Abstract

Studies of the possibility of using wastewater from poultry enterprises for irrigation of light chestnut soils using sprinkler machines have shown that wastewater needs preliminary treatment. Currently, it remains relevant to search for the most effective and cost-efficient ways to treat wastewater. We propose wastewater treatment by sedimentation on natural zeolite, after which the treated effluents can be discharged into storage ponds for further use in agriculture using sprinklers. For sewage treatment, the settling method was used, before which the particle size distribution of zeolite tuffs was selected and the size of fractions was selected using sieves. The sedimentation was carried out at regular intervals on a natural sorbent (zeolite tuffs). As a result of the study, the optimal contact time of the natural sorbent with the studied effluents was selected, which allowed to reduce the concentration of impurities present to the value below the maximum permissible one. As a result of settling for 80 minutes, there is a decrease in the concentration of chemical impurities in the studied poultry runoff to the maximum permissible concentration. Irrigation with wastewater diluted in 1: 4 with pure water increased the yield of spring wheat compared to the control option by a factor of 1.5. The absorption of organic substances by a soil layer 0.6 m thick is 80-100%. Agricultural use of wastewater diluted 6-7 times provides additional net income from the cultivation of spring wheat by 40%.