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Potential use of treated wastewater and sludge in the agricultural sector of the Gaza strip

机译：加沙地带农业部门中经过处理的废水和污泥的潜在利用

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Twelve elements (Ag, Al, As, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb, and Zn) were analyzed in 120 composite samples of influent and effluent wastewater; the results revealed that domestic wastewater influent contains considerable amounts of heavy metals and the partially functional treatment plants of Gaza are able to remove 40-70% of most metals during the treatment process. Heavy metals in 31 industrial wastewater effluents are within the ranges of international standards. All industries of Gaza are light; although they have no treatment facilities, their effluents are being discharged to municipal sewerage system and the existing treatment plants are capable of absorbing the industrial effluents with no significant impact on treatment bioprocesses. Thirty parameters were determined in 35 sludge samples: P, AOX, C, S, CaCO{sub}3, Mg, Ca, Na, K, Li, Cu, Zn, Ni, Pb, Mn, Fe, Cr, Co, Cd, As, Hg, Ti, Se, Br, Rb, Th, Sr, Y, U, and Zr. Although there are no treatment facilities for sludge within the treatment plants, the results indicated that sludge in general is clean of heavy metals. Only Zinc and AOX showed anomalous concentrations; more than 85% of sludge samples showed that averages of zinc and AOX are 2,000 mg/kg and 550 mg Cl/kg, respectively, which exceed the standards of all industrial countries for sludge to be used in land application.
机译：分析了120个进水和出水废水复合样品中的十二种元素（银，铝，砷，镉，钴，铬，铜，铁，锰，镍，铅和锌）；结果表明，生活污水中含有大量的重金属，加沙具有部分功能的处理厂在处理过程中能够去除40-70％的大多数金属。 31种工业废水中的重金属在国际标准范围内。加沙的所有产业都是轻工业。尽管它们没有处理设施，但它们的废水已排入市政污水处理系统，并且现有的处理厂能够吸收工业废水，而对处理生物过程没有重大影响。在35个污泥样品中确定了30个参数：P，AOX，C，S，CaCO3 {3}，Mg，Ca，Na，K，Li，Cu，Zn，Ni，Pb，Mn，Fe，Cr，Co，Cd ，As，Hg，Ti，Se，Br，Rb，Th，Sr，Y，U和Zr。尽管在处理厂内没有污泥处理设施，但结果表明，污泥通常不含重金属。仅锌和AOX浓度异常；超过85％的污泥样品表明，锌和AOX的平均值分别为2,000 mg / kg和550 mg Cl / kg，超过了所有工业化国家用于土地应用的污泥的标准。

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