WO2012100550A1 - 一种零价铁两相厌氧反应器 - Google Patents

一种零价铁两相厌氧反应器 Download PDF

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Publication number
WO2012100550A1
WO2012100550A1 PCT/CN2011/079911 CN2011079911W WO2012100550A1 WO 2012100550 A1 WO2012100550 A1 WO 2012100550A1 CN 2011079911 W CN2011079911 W CN 2011079911W WO 2012100550 A1 WO2012100550 A1 WO 2012100550A1
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reactor
anaerobic
zero
valent iron
hydrolysis acidification
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English (en)
French (fr)
Inventor
张耀斌
刘轶文
全燮
孟旭升
陈硕
赵智强
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Dalian University of Technology
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Dalian University of Technology
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Priority to US13/981,884 priority Critical patent/US8758616B2/en
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/28—Anaerobic digestion processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/28—Anaerobic digestion processes
    • C02F3/286—Anaerobic digestion processes including two or more steps
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/10—Packings; Fillings; Grids
    • C02F3/105—Characterized by the chemical composition
    • C02F3/107—Inorganic materials, e.g. sand, silicates
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/28—Anaerobic digestion processes
    • C02F3/2826—Anaerobic digestion processes using anaerobic filters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Definitions

  • the invention relates to a wastewater treatment technology, in particular to a zero-valent iron two-phase anaerobic reactor.
  • the anaerobic wastewater treatment process is not restricted by dissolved oxygen, and has obvious advantages in the treatment of medium and high concentration wastewater: high volumetric load, short hydraulic retention time, low energy consumption, and biogas generation.
  • Anaerobic process volume load reach a dozen to several tens kg COD / m 3 d, the aerobic process is generally ten times or more, and is suitable for one treatment process, high concentration organic waste water.
  • zero-valent iron As a cheap and environmentally friendly reducing agent, zero-valent iron has received more attention in the field of pollution control in recent years. According to reports, in the anoxic groundwater, zero-valent iron can not only directly decompose organochlorine as an electron donor, but also provide electrons for the production of the mites, promote the metabolism of the mites, and accelerate the organic chlorine. Mineralization.
  • PRBs permeable active grids designed according to this principle have been used in groundwater and soil pollution remediation.
  • zero-valent iron is mainly used for pretreatment before biological treatment, in order to improve the biodegradability of wastewater.
  • the activity of the zero-valent iron bed may be affected due to the adhesion of microorganisms.
  • the anaerobic hydrolysis acidification product as a substrate for the production of formazan the type and yield of acidification products undoubtedly have a great impact on the subsequent production of formazan.
  • the pH, oxidation-reduction potential, and substrate concentration of the reactor all have important effects on the hydrolysis process.
  • the environment suitable for the production of formazan is not necessarily suitable for the hydrolysis and acidification, nor can it regulate the formation of substrate types that are favorable for hyperthyroidism. Therefore, the formation of an acidified product which is favorable for the production of formazan is important for improving the anaerobic treatment performance.
  • the existing two-phase anaerobic treatment process whose main goal is to improve the efficiency of the production of the nail-forming section, and lacks an effective method for regulating the hydrolysis acidification process.
  • a zero-valent iron two-phase anaerobic reactor comprising a cylindrical anaerobic hydrolysis acidification reactor, a feed water pump, a regulating tank, a circulation pump and an anaerobic nail-reducing reactor,
  • the lower part of the anaerobic hydrolysis acidification reactor is connected to the feed water pump through the water inlet pipe, and the upper water outlet pipe of the anaerobic hydrolysis acidification reactor is connected with the regulating tank, and the circulation pump inputs the sewage in the regulating tank through the water inlet pipe to the anatomical tank.
  • Oxygen production reactor; 2 to 4 zero-valent iron filling layers are disposed in the middle of the anaerobic hydrolysis acidification reactor.
  • the lowest point of the zero-valent iron-filled layer of the present invention is located at 1/2 of the effective height H of the anaerobic hydrolysis acidification reactor, and the height of the zero-valent iron-filled layer is 10% of the effective height H of the anaerobic hydrolysis acidification reactor.
  • the bottom plate and the surrounding wall of the zero-valent iron filling layer are provided with sieve holes; the zero-valent iron filling layer is filled with the zero-valent iron granular material of 2/3 height.
  • the present invention processes the hydrolysis acidification and the production of formazan in two anaerobic reactors in series, that is, a two-phase anaerobic process.
  • the technology places zero-valent iron in the hydrolysis acidification section, and utilizes the strengthening ability of zero-valent iron to anaerobic hydrolysis of organic substances, promotes the metabolic reaction of microorganisms, and generates a large number of easy-to-be-reported segments.
  • the acetic acid used in the production of formazan reduces the production of propionic acid which inhibits the production of formazan, thereby regulating the hydrolysis and acidification process; at the same time, the acidic pH of the hydrolysis tank promotes zero-valent iron.
  • the dissolution reaction, the formation of divalent iron ions with the effluent into the anaerobic meruform reactor significantly enhanced the activity of the second stage of the production of mites, thereby improving the stability and processing capacity of the overall anaerobic reactor.
  • the invention provides a zero-valent iron layer in the middle of the anaerobic hydrolysis acidification reactor, and the effluent enters the anaerobic meruform reactor, which is not a simple superposition of the anaerobic reactor and the zero-valent iron technology, but can form the following coupling Function: 1) Zero-valent iron effectively enhances the degradation of organic matter in anaerobic hydrolysis acidification tank; 2) Hydrolysis of acid in the acidification tank promotes the production of acetic acid, thereby regulating the hydrolysis and acidification process; 3) Further strengthening the acid produced Dissolution of zero-valent iron; 4) The dissolved ferrous iron enters the anaerobic meruform reactor to promote the growth of the mites-producing bacteria, accelerate the granulation, and significantly improve the organic processing capacity of the reactor.
  • the invention is provided with 2 ⁇ 4 zero-valent iron filling layers in the middle of the hydrolysis acidification reactor, and the zero-valent iron effectively strengthens the organic matter degradation ability in the anaerobic hydrolysis acidification tank, and promotes the easy production of the microorganisms in the latter stage.
  • the formation of acetic acid is utilized to effect the regulation of the hydrolysis acidification process; the effluent from the hydrolysis acidification tank is passed through a circulation pump to the post-anaerobic meruform reactor.
  • the two-phase anaerobic reactor has simple and reasonable structure and good working performance, and overcomes the defect that the anaerobic reactor is difficult to start with acidification.
  • the hydrolysis of acidified effluent enhanced by zero-valent iron improves the decomposition rate of anaerobic melanogenic bacteria to organic matter.
  • the anaerobic nail-producing reactor is stable and has strong impact resistance.
  • the acid production capacity and the production capacity of the system are significantly improved compared with similar reference reactors.
  • Figure 1 is a schematic view showing the structure of a zero-valent iron-reinforced two-phase anaerobic reactor.
  • Figure 2 is a comparative plot of the change in chemical oxygen demand (COD) of the influent and effluent phases during the start-up phase of synthetic glucose wastewater.
  • Figure 3 is a graph comparing the changes in acetic acid output from the start-up phase of synthetic glucose wastewater.
  • Anaerobic hydrolysis acidification reactor 2. Feed water pump, 3. Zero-valent iron filling layer, 4. Adjustment Pool, 5, circulation pump, 6, anaerobic nail production reactor.
  • a zero-valent iron two-phase anaerobic reactor includes a cylindrical anaerobic hydrolysis acidification reactor 1, a feed water pump 2, a regulating tank 4, a circulation pump 5, and an anaerobic nail-producing reactor. 6.
  • the lower portion of the anaerobic hydrolysis acidification reactor 1 is connected to the feed water pump 2 through an inlet pipe, and the upper outlet pipe of the anaerobic hydrolysis acidification reactor 1 is connected to the adjustment tank 4, and the circulation pump 5 is adjusted in the adjustment tank 4.
  • the sewage is supplied to the anaerobic meruform reactor 6 through the water inlet pipe; characterized in that: 2 to 4 zero-valent iron-filled layers 3 are disposed in the middle of the anaerobic hydrolysis acidification reactor 1.
  • the lowest point of the zero-valent iron-filled layer 3 is located at 1/2 of the effective height H of the anaerobic hydrolysis acidification reactor 1, and the height of the zero-valent iron-filled layer 3 is 10 of the effective height H of the anaerobic hydrolysis acidification reactor 1.
  • % ⁇ 15%, the bottom plate and the surrounding wall of the zero-valent iron filling layer 3 are provided with sieve holes; the zero-valent iron filling layer 3 is filled with a zero-valent iron granular material having a height of 2/3.
  • the anaerobic hydrolysis acidification reactor 1 shown in Fig. 1 is made of plexiglass and has an inner diameter of 10 cm, a height of 25 cm and an effective volume of 1.8 L.
  • a zero-valent iron filling layer 3 is provided in the middle of the anaerobic hydrolysis acidification reactor 1.
  • the sewage enters the anaerobic hydrolysis acidification reactor 1 through the feed water pump 2 and the water inlet pipe, and then passes through the zero-valent iron filling layer 3.
  • the anaerobic nail-producing reactor 6 is driven by the circulation pump 5, which has an inner diameter of 10 cm, a height of 100 cm, and an effective volume of 7.5 liters.
  • the working process of the present invention is as follows:
  • the sewage a enters the bottom of the anaerobic hydrolysis acidification reactor 1 through the feed water pump 2, and is in full contact with the organism in the sludge during the ascending process of the sewage, and then passes through the zero-valent iron filling layer 3 to reach
  • the nozzle enters the conditioning tank 4, after which the anaerobic hydrolysis acidification reactor 1 enters the anaerobic meruform reactor 6 through the circulation pump 5.
  • the conditions for treating synthetic glucose wastewater by the present invention are shown in Figures 2 and 3.
  • the abscissa in Figure 2 is the number of days of stable operation of the reactor, and the ordinate is the COD value; five of the curves are the COD value of the effluent from the hydrolysis acidification section of the influent and zero-valent iron-enhanced anaerobic reactor, and the effluent COD of the production section The value, and the COD value of the effluent from the hydrolysis acidification section of the ordinary two-phase anaerobic reactor and the COD value of the effluent from the production section.
  • the reactor is stably operated, and the ordinate is the acetic acid value; wherein the two curves are the acetic acid value of the effluent from the hydrolysis acidification section of the zero-valent iron-enhanced anaerobic reactor and the hydrolysis and acidification of the common two-phase anaerobic reactor.
  • the acetic acid value of the effluent It can be seen from Fig.

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  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Description

说 明 书 一种零价铁两相厌氧反应器 技术领域
本发明涉及一种废水处理技术， 特别是一种零价铁两相厌氧反应器。
背景技术
化工、 制药、 焦化等许多工业行业都要排放中、 高浓度难降解废水， 这类 废水有机负荷高、 生物降解性差， 多数含有毒性物质， 排放到水体后对环境和 人类健康产生较大威胁， 一直是废水处理中的难题。
厌氧污水处理工艺由于不受溶解氧的制约， 在处理中、 高浓度废水时优势 明显： 容积负荷高、 水力停留时间短、 能耗小、 产生沼气等。 厌氧工艺的容积 负荷可达到十几到几十 kg COD/m3 d， 是一般好氧工艺的十倍以上， 是中、 高 浓度有机废水的适宜处理工艺之一。
但厌氧工艺在实际运行中容易受到酸化干扰， 严重影响污水处理效果。 造 成这一结果的主要原因是， 水解、 发酵菌代谢能力强、 繁殖速度快、 对环境的 适应性较强。 产甲垸细菌繁殖速度较慢， 且受环境因素如 pH值、 温度、 抑制 物质的影响较大。 在正常运行的厌氧反应器内， 以上阶段维持着某种程度的动 态平衡。 一旦条件发生变化， 则首先表现为对甲垸化的抑制， 结果会导致有机 酸的积累， 并进一步恶化产甲垸菌的生长条件， 甚至导致整个消化过程停滞。 众所周知， 产甲垸是厌氧污水处理有机物的主要矿化途径。 一旦产甲垸过程受 阻， 污水处理效率必然下降。
为了提高厌氧污水处理的稳定性， 必须控制厌氧的酸性。 目前， 人们采用 增加进水碱度、 在反应器中投加碱液等方式控制 pH。 这些做法除了增加操作的 复杂性外， 在加药点或进水点的碱液浓度显著高于其他部位， 长期、 连续投加 将对厌氧处理系统构成严重伤害。 因此， 在调控 pH时， 同样应考虑在其它方面 为厌氧产甲垸菌创造适宜的生长环境。
零价铁作为一种廉价、 环境友好的还原剂， 近些年来在污染控制领域受到 较多关注。 据报道， 零价铁在缺氧的地下水中， 不仅可以直接作为电子供体分 解有机氯， 还可为产甲垸菌提供电子， 促进产甲垸菌的代谢， 从而加快有机氯 的矿化。 目前， 按照这一原理设计的可渗透性活性格栅（PRB ) 已经在地下水和 土壤污染修复中得到应用。 在废水处理方面， 零价铁则主要被用在生物处理之 前的预处理， 目的是提高废水的可生化性。我们在专利申请号为 200910012293.4 的 《一种零价铁的污水处理方法》 中， 将零价铁置于厌氧反应器中， 零价铁缓 慢释放的亚铁离子， 可有效压缩胶体污泥的双电层， 降低 Zeta电位， 加速污泥 颗粒化的进程。 除此之外， 零价铁可显著降低厌氧反应器内的氧化还原电位， 缓解酸性， 有助于厌氧微生物的生长。
该方法在运行一段时间后， 由于微生物的附着， 零价铁床层的活性可能会 受到影响。 另一方面， 厌氧水解酸化产物作为产甲垸菌的底物， 其酸化产物的 种类与产量无疑对后续产甲垸过程有巨大影响。 研究表明， 产甲垸菌对乙酸的 利用率较高， 而丙酸等对产甲垸有抑制作用。 而反应器的 pH、 氧化还原电位、 底物浓度等对水解过程都有重要影响。 显然， 在单一的厌氧反应器内， 适合于 产甲垸的环境未必适于水解酸化的进行， 也无法调控形成有利于甲垸化的底物 类型。 因此， 形成有利于产甲垸的酸化产物对于提高厌氧处理性能有重要意义。
现有的两相厌氧处理工艺， 其主要目标是提高产甲垸段的效率， 缺乏针对 水解酸化过程调控的有效方法。
发明内容
为了克服现有技术中存在的问题， 本发明的目的是提供一种既可以提高产 甲垸段的效率、 又针对水解酸化过程进行有效调控的零价铁强化的厌氧两相反 应器。
本发明采用的技术方案是： 一种零价铁两相厌氧反应器， 包括圆筒形的厌 氧水解酸化反应器、 进水泵、 调节池、 循环泵和厌氧产甲垸反应器， 所述的厌 氧水解酸化反应器的下部通过进水管道与进水泵连接， 厌氧水解酸化反应器的 上部出水管道与调节池连接， 循环泵则将调节池中的污水通过进水管道输入至 厌氧产甲垸反应器； 在所述的厌氧水解酸化反应器的中部设置 2〜4个零价铁填 充层。
本发明所述的零价铁填充层的最低处位于厌氧水解酸化反应器有效高度 H 的 1/2处，零价铁填充层的高度为厌氧水解酸化反应器有效高度 H的 10%〜15%， 零价铁填充层的底板和围壁上设有筛孔；在零价铁填充层中装填有 2/3高度的零 价铁粒状材料。 与现有技术相比， 本发明具有以下有益效果：
1、 由于本发明将水解酸化和产甲垸过程分别在两个串联的厌氧反应器中进 行， 即两相厌氧工艺。 但不同于普通的两相厌氧工艺， 本技术将零价铁置于水 解酸化段， 利用零价铁对有机物厌氧水解的强化能力， 促进微生物的代谢反应， 生成了大量的易于被后段产甲垸菌所利用的乙酸， 降低了对产甲垸菌产生抑制 作用的丙酸的产量， 从而实现对水解酸化过程的调控； 与此同时， 水解池偏酸 性的 pH则促进了零价铁的溶出反应，形成的二价铁离子随出水进入厌氧产甲垸 反应器后显著增强了后段的产甲垸菌活性， 从而提高整体厌氧反应器的稳定性 及处理能力。
2、 本发明在厌氧水解酸化反应器的中部设置零价铁层， 出水进入厌氧产甲 垸反应器， 这不是厌氧反应器与零价铁技术的简单叠加， 而是可形成以下耦合 作用： 1 ) 零价铁有效地强化厌氧水解酸化池中有机物降解能力； 2) 水解酸化 池中铁的作用同时促进乙酸的产生， 从而实现对水解酸化过程的调控； 3 ) 产生 的酸进一步强化零价铁的溶出； 4) 溶出的二价铁进入厌氧产甲垸反应器后促进 产甲垸菌的生长， 加速颗粒化， 使反应器的有机物处理能力得到显著提升。
3、 本发明在位于水解酸化反应器的中部设置 2〜4个零价铁填充层， 零价 铁有效地强化了厌氧水解酸化池中有机物降解能力， 并促进易于被后段产甲垸 菌所利用的乙酸的形成， 实现对水解酸化过程的调控； 水解酸化池出水通过循 环泵进入到后置的厌氧产甲垸反应器。 该两相厌氧反应器结构简单合理， 工作 性能好， 克服了厌氧反应器启动困难易于酸化的缺陷， 经零价铁强化的水解酸 化出水提高了厌氧产甲垸菌对有机物的分解速度， 使厌氧产甲垸反应器稳定运 行， 抗冲击能力强， 该系统的产酸能力及产甲垸能力较同类参比反应器都有了 显著地提升。
附图说明
本发明共有附图 3张， 其中：
图 1是一种零价铁强化两相厌氧反应器结构示意图。
图 2是采用合成葡萄糖废水启动阶段进、出水化学需氧量 (COD)变化对比曲 线图。
图 3是采用合成葡萄糖废水启动阶段出水乙酸变化对比曲线图。
图中： 1、 厌氧水解酸化反应器， 2、 进水泵， 3、 零价铁填充层， 4、 调节 池， 5、 循环泵， 6、 厌氧产甲垸反应器。
具体实施方式
下面结合附图和实施例对本发明作进一步说明。 如图 1 所示， 一种零价铁 两相厌氧反应器， 包括圆筒形的厌氧水解酸化反应器 1、 进水泵 2、 调节池 4、 循环泵 5和厌氧产甲垸反应器 6，所述的厌氧水解酸化反应器 1的下部通过进水 管道与进水泵 2连接， 厌氧水解酸化反应器 1的上部出水管道与调节池 4连接， 循环泵 5则将调节池 4中的污水通过进水管道输入至厌氧产甲垸反应器 6;其特 征在于： 在所述的厌氧水解酸化反应器 1的中部设置 2〜4个零价铁填充层 3。 所述的零价铁填充层 3的最低处位于厌氧水解酸化反应器 1有效高度 H的 1/2 处，零价铁填充层 3的高度为厌氧水解酸化反应器 1有效高度 H的 10%〜15%， 零价铁填充层 3的底板和围壁上设有筛孔；在零价铁填充层 3中装填有 2/3高度 的零价铁粒状材料。
图 1 所示的厌氧水解酸化反应器 1 的壳体采用有机玻璃制成， 其内径为 10cm, 高为 25cm， 有效容积为 1.8L。在厌氧水解酸化反应器 1中部设有零价铁 填充层 3。 污水通过进水泵 2及进水管道进入厌氧水解酸化反应器 1， 后经过零 价铁填充层 3。 出水进入调节池 4后通过循环泵 5打入厌氧产甲垸反应器 6， 其 内径为 10cm， 高 100cm, 有效容积为 7.5L。
本发明的工作过程如下： 污水 a通过进水泵 2进入厌氧水解酸化反应器 1 的底部， 在污水上升过程中与污泥中的生物体充分接触， 后穿过零价铁填充层 3 到达出水口进入调节池 4，后厌氧水解酸化反应器 1通过循环泵 5进入厌氧产甲 垸反应器 6。
经本发明处理合成葡萄糖废水的情况见图 2和图 3。图 2中的横坐标为反应 器稳定运行的天数， 纵坐标为 COD值； 其中五条曲线分别是进水、 零价铁强化 厌氧反应器水解酸化段出水的 COD值及产甲垸段出水 COD值， 和普通两相厌 氧反应器水解酸化段出水的 COD值及产甲垸段出水 COD值。 图 3中的横坐标 为反应器稳定运行的天数， 纵坐标为乙酸值； 其中二条曲线分别是零价铁强化 厌氧反应器水解酸化段出水的乙酸值及普通两相厌氧反应器水解酸化段出水的 乙酸值。由图 2-3可看出零价铁强化两相厌氧反应器的水解酸化段及产甲垸段的 COD去除能力均高于普通两相厌氧反应器的相应部分， 同时零价铁强化两相厌 氧反应器的水解酸化段产乙酸量明显高于普通两相厌氧反应器水解酸化段。

Claims

权 利 要 求 书
1、 一种零价铁两相厌氧反应器， 包括圆筒形的厌氧水解酸化反应器 （1)、 进水泵 （2)、 调节池 （4)、 循环泵 （5) 和厌氧产甲垸反应器 （6)， 所述的厌氧 水解酸化反应器 （1) 的下部通过进水管道与进水泵 （2) 连接， 厌氧水解酸化 反应器 （1) 的上部出水管道与调节池 （4) 连接， 循环泵 （5) 则将调节池 （4) 中的污水通过进水管道输入至厌氧产甲垸反应器 （6); 其特征在于： 在所述的 厌氧水解酸化反应器 （1) 的中部设置 2〜4个零价铁填充层 （3)。
2、 根据权利要求 1所述的一种零价铁两相厌氧反应器， 其特征在于： 所述 的零价铁填充层（3) 的最低处位于厌氧水解酸化反应器（1)有效高度 H的 1/2 处， 零价铁填充层（3)的高度为厌氧水解酸化反应器（1)有效高度 H的 10%〜 15%, 零价铁填充层 （3) 的底板和围壁上设有筛孔； 在零价铁填充层 （3) 中装 填有 2/3高度的零价铁粒状材料。
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