A study of treated municipal waste leachate and Zeolite effects on soils

Document Type: Full Article

Authors

1 Department of Soil Science, College of Agriculture and Natural Resources, University of Tehran, Karaj, I. R. Iran

2 Department of Water Engineering, Faculty of Agriculture, Shahrekord University, Shahrekord, I. R. Iran

Abstract

ABSTRACT- As the world's population has grown and become more urban and affluent, waste production has raised drastically. Wastewater reuse has been identified as a way to alleviate water scarcity and improve crop productivity and environmental sustainability. To address the issue, a soil column experiment was carried out in a 3 × 3 factorial randomized block design including three treatments of adsorbents (non-pretreated leachate (L1), rice husk filtered leachate (L2), activated carbon filtered leachate (L3)) and three levels of zeolite (0, 5 and 10% by soil weight).A decrease in drainage water volume through the experiment period was observed. Application of zeolite at 5% level could improve soil removal efficiency and had a positive impact on the quality of the wastewater, as indicated by changes in EC, Na+, Ca2++Mg2+, Cl- (decreased by 22%, 15%, 24%, 15% respectively) and total P (increased by 12%) for treatment of leachate. However, adding 10% zeolite did not make a significant difference (p<0.05). Adsorbents used in the experiment had a significant effect (p<0.05) on the parameters such as N-NH4+, SAR, total P and Na+ content. Changes in most parameters for the L3 treatment were statistically significant (p<0.05) compared to other leachates (less N-NH4+ (40%), total P (33%) and more Ca2++Mg2+ (14.3%), Na+ (14%)) indicating an increase in adsorbent efficiency due to rice husk activation. Therefore, it can be concluded that application of zeolite can improve soil removal efficiency for treatment of leachate, but the rates of application can be case sensitive depending on the soil and the type of zeolite.

Keywords

Main Subjects


Article Title [Persian]

مطالعه اثرات استفاده از شیرابه تیمار شده پسماند زباله شهری و زئولیت برخاکها

Authors [Persian]

  • حسین میر سید حسینی 1
  • رسول کریمی 1
  • سپیده باقری 1
  • حسن طباطبایی 2
1 گروه علوم خاک ، دانشکده کشاورزی، دانشگاه تهران، کرج ، ج. ا. ایران
2 گروه مهندسی آب، دانشکده کشاورزی، دانشگاه شهر کرد، شهر کرد، ج. ا. ایران
Abstract [Persian]

چکیده- همانطور که جمعیت جهان در حال رشد بوده و شهر نشینی و رفاه افزایش یافته ، تولید زباله نیز به شدت در حال افزایش می باشد. استفاده مجدد ازفاضلاب به عنوان یک راهکار برای کاهش کمبود آب، بهبود تولید محصول و پایداری محیط زیست شناخته شده است. به جهت بررسی این مسئله، آزمایش ستون خاک براساس طرح بلوک تصادفی فاکتوریل 3×3 شامل سه تیمار جاذب (شیرابه بدون پیش تصفیه (L1)، شیرابه  عبور نموده از پوسته برنج (L2)، شیرابه عبور نموده از کربن فعال (L3)) و سه سطح زئولیت (0، 5 و 10 % وزنی خاک)  انجام پذیرفت. حجم آب زهکشی شده در طول آزمایش کاهش یافت. کاربرد سطح 5% زئولیت کارایی برداشت خاک را می تواند بهبود بخشد و اثر مثبتی بر کیفیت زه آب دارد. همچنان که به صورت تغییرات در EC, Na+, Ca2++Mg2+Cl-(تا 22%، 15%، 24%، %15 کاهش یافته) و فسفر کل (تا 12% افزایش یافته) در تیمار شیرابه نشان داده شده است. اما افزودن 10%  زئولیت تفاوت معنی داری نداشت (05/0p<). جاذب های مورد استفاده در این آزمایش اثر معنی داری بر پارامتر هایی مانند N-NH4+, SAR، فسفر کل و مقدار سدیم داشتند. تغییرات در اغلب پارامترها در تیمار L3از نظر آماری به طور معنی دار (05/0p <) در مقایسه با دیگر شیرابه ها (( N-NH4+(40%) و فسفر کل (33%)  بیشتر و Ca2++Mg2+(3/14%) و سدیم (14%) کمتر) متفاوت بود، که نشان دهنده افزایش کارایی جاذب ناشی از فعال سازی پوسته برنج می باشد. کاربرد زئولیت می تواند کارایی برداشت خاک را برای تیمار شیرابه بهبود بخشد، اما سطوح کاربرد بسته به خاک و نوع زئولیت متفاوت خواهد

Keywords [Persian]

  • زه آب
  • شیرابه
  • تصفیه زمینی
  • خاک
  • جاذب
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