ارزیابی پتانسیل کودی لجن تصفیه‌خانه کشتارگاه صنعتی دام و اثر آن بر ویژگی‌های شیمیایی خاک (مطالعه موردی: کشتارگاه صنعتی دام سنندج)

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه علوم و مهندسی خاک، دانشکده کشاورزی، دانشگاه کردستان، سنندج، ایران

2 گروه علوم و مهندسی خاک، دانشکده کشاورزی، دانشگاه کردستان

چکیده

استفاده از لجن فاضلاب در خاک­های کشاورزی با ماده­ی آلی کم یکی از مهم­‌ترین روش­های بازچرخانی سالم این پس­ماند آلی است؛ اما وجود آلاینده­هایی همچون فلزات سنگین در آن برای سلامت انسان و محیط‌زیست زیان­بار است که بایستی پیش از استفاده مورد ارزیابی قرار گیرد. در این پژوهش، کنترل کیفی لجن حاصل از تصفیه‌خانه کشتارگاه صنعتی دام سنندج از دیدگاه بهبود کیفیت و سلامت خاک ارزیابی شد. همچنین اثر این لجن بر ویژگی­های شیمیایی خاک تحت تیمار خاک با t ha-112 از این لجن و گرماگذاری آن به مدت 70 روز انجام شد. نتایج حاصل از مقایسه ویژگی­های لجن با استانداردهای معتبر نشان داد که این لجن از نظر pH، میزان کل C، N، K، Na، Mn، Fe، Zn، Pb، Ni و Cd در حد استاندارد کودهای آلی برای اهداف کشاورزی است اما میزان قابلیت هدایت الکتریکی در این لجن با ضریب زیان­آوری (HQ) برابر با 5/1 به میزان کمی بیش از استاندارد کودهای آلی برای اهداف کشاورزی می­باشد. همچنین نتایج حاصل از تیمار خاک با این لجن سبب افزایش میزان N (%4/148)، NO3 (%7/113)، C (20%)، P (%2/118)، Fe (%7/90)، Zn (%0/440) و Na (%0/66) و EC (%7/168) خاک در مقایسه با شاهد شد. بر اساس نتایج این ارزیابی، کیفیت لجن بررسی‌شده برای اهداف کشاورزی مناسب می­باشد؛ هرچند که پیشنهاد می‌شود قبل از کاربرد این لجن در کشاورزی، از نظر آلودگی­های میکروبی و آلی مورد بررسی قرار گیرد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Fertilizing Potential Assessment of Livestock Industrial Abattoir Refinery Sludge and Its Effect on Soil Chemical Properties (Case Study: Livestock Industrial Abattoir of Sanandaj)

نویسندگان [English]

  • Mehran Gholami 1
  • Zahed Sharifi 2
1 Department of Soil Science, College of Agriculture, University of Kurdistan
2 Department of Soil Science, College of Agriculture, University of Kurdistan
چکیده [English]

Application of sewage sludge in low organic matter agricultural soils is one of the most important methods for healthy recycling of such organic waste. But the presence of contaminants such as heavy metals in sewage sludge may pose risks and hazards to humans and the environment, which must be evaluated before use. This study was conducted to investigate the effect of industrial abattoir refinery sludge, produced in Sanandaj city, on improving the soil quality and health. Furthermore, the effect of sludge on the soil chemical properties was investigated by treating the soil with 12 ton ha-1 of sludge and incubating it for 70 days. The results of comparing sludge properties with valid standards showed that this sludge is in the standard range of organic fertilizers for agricultural purposes in terms of pH, total C, N, K, Na, Mn, Fe, Zn, Pb, Ni and Cd. But the salinity of the sludge with a Hazard Quotient (HQ) of 1.5 was slightly above the standard level of organic fertilizers for agricultural purposes. Furthermore, soil treated with the sludge increased N (148.4%), NO3 (113.7%), C (20%), P (118.2%), Fe (90.7%), Zn (440%) and Na (66%) as compared to the control soil. Based on the results of this assessment, in general the quality of the sludge is suitable for agricultural purposes. However, it is suggested that the sludge is examined in terms of microbial and organic contamination before it is used in agriculture. 

کلیدواژه‌ها [English]

  • Abattoir sludge
  • Heavy metals
  • nutrient elements
  • Organic fertilizer
  • Soil quality
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