Purpose of Review

The use of conventional chemical coagulant in treatment of wastewater is gaining great attention. Drawbacks related to the prolonged effects on human health and environment due to the generation of by-product non-biodegradable sludge are becoming the latest topics. Transition from chemical to natural coagulant can be a good strategy to reduce the aforementioned drawbacks. Therefore, this review aims to provide critical discussions on the use of natural coagulant along with the comparative evaluation over the chemical coagulant.

Recent Findings

Treatment performances by chemical and natural coagulant have been reviewed on various types of wastewater with different success rates. Based on this review, a transition from the use of chemical to natural coagulant is highly suggested as the performance of the natural coagulant is comparable to that of the chemical coagulant and in some cases even better. The comparative advantages and disadvantages also convinced that the natural coagulant stands a great chance to be used as an alternative over the chemical coagulant.

Summary

Though the current utilization of natural coagulant is encouraging, three main aspects were overlooked by researchers: active coagulant agent, extraction, and optimization due to different wastewater characteristics. Furthermore, delving into these aspects could clarify the uncertainties on the natural coagulant. Hence, it makes this transition a prospect of green technology with sustainable application towards wastewater treatment.

中文翻译：

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基于混凝的废水处理的最新进展：从化学混凝剂到天然混凝剂的转变

审查目的

常规化学混凝剂在废水处理中的应用正引起广泛关注。由于产生副产物不可生物降解的污泥而对人类健康和环境造成长期影响的弊端正成为最新话题。从化学凝结剂向天然凝结剂的过渡可能是减少上述缺点的好策略。因此，本综述旨在就天然凝结剂的使用以及对化学凝结剂的比较评估提供关键性的讨论。

最近的发现

综述了化学和天然混凝剂对各种类型废水的处理性能，其成功率不同。基于该综述，强烈建议从化学凝结剂过渡到天然凝结剂，因为天然凝结剂的性能与化学凝结剂相当，在某些情况下甚至更好。比较的优缺点也使人相信，天然凝结剂极有可能被用作化学凝结剂的替代品。

概括

尽管目前对天然混凝剂的利用令人鼓舞，但研究人员忽略了三个主要方面：活性混凝剂，提取和由于废水特性不同而进行的优化。此外，深入研究这些方面可以澄清天然凝结剂的不确定性。因此，它将使这种过渡成为绿色技术的前景，并将其可持续地应用于废水处理。